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Journal articles on the topic 'Canadian Marine Drilling Limited'

Author: Grafiati

Published: 4 June 2021

Last updated: 29 July 2025

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1

Reyff, James, and Adwait Ambaskar. "Down-the-hole drilling construction acoustic research." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 269, no. 1 (2024): 1108–23. http://dx.doi.org/10.3397/nc_2024_0149.

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nd The Alaska Department of Transportation and Public Faculties (DOT&PF) is conducting research to characterize underwater sounds from down-the-hole (DTH) drilling activities. This method of drilling is commonly used to drill holes through hard or rock substrates to support piles or tensions anchors for piles. A pneumatic DTH hammer is driven by pressured air coming from an air compressor that provides the energy to power the percussion piston that hits the drill bit with a specific impact frequency and energy to break the rock and advanced the hole. This activity produces continuous and i

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2

Zazarli Shah, Mohamad Safwan, Arina Sauki, Wan Zairani Wan Bakar, Nurul Aimi Ghazali, and Azlinda Azizi. "Drilling Fluid Design for Shale Gas Drilling." Advanced Materials Research 1113 (July 2015): 617–24. http://dx.doi.org/10.4028/www.scientific.net/amr.1113.617.

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Shale gas nowadays is an important source of unconventional gas. The limited conventional gas supply makes the unconventional sources as a new source of gas. In this research, the aim is to design a mud formulation that can carry out essential functions of mud for shale gas drilling. Commonly for shale gas drilling, water based mud is used. However, water based mud is ineffective when dealing with water-sensitive shale. The alternative way to deal with this type of shale is using synthetic-based mud (SBM) or oil-based mud (OBM). OBM is an effective mud while drilling well. However, it is toxic

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3

Harries, Peter J., and Kenneth M. Schopf. "The first evidence of drilling predation in inoceramids." Journal of Paleontology 77, no. 5 (2003): 1011–15. http://dx.doi.org/10.1017/s0022336000044838.

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The inoceramid bivalves first appeared in the Permian of Australia (Browne and Newell, 1966; Waterhouse, 1970), thrived during certain intervals in the Jurassic (e.g., the Toarcian; Harries and Little, 1999), and dominated many benthic marine communities globally from the late Early through the Late Cretaceous. Despite excellent preservation (the prismatic, outer calcitic layer is retained in many cases), ubiquitous presence in Late Mesozoic marine deposits, and intense study (e.g., Tröger, 1967; Kauffman et al., 1977; Crampton, 1996; Walaszczyk and Cobban, 2000; Walaszczyk et al., 2001), no e

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4

Wang, Qibing, Ren Wang, Jiaxin Sun, et al. "Effect of Drilling Fluid Invasion on Natural Gas Hydrate Near-Well Reservoirs Drilling in a Horizontal Well." Energies 14, no. 21 (2021): 7075. http://dx.doi.org/10.3390/en14217075.

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Horizontal wells can significantly improve the gas production and are expected to be an efficient exploitation method for the industrialization of natural gas hydrates (NGHs) in the future. However, the near-wellbore hydrate is highly prone to decomposition during the drilling process, owing to the disturbance aroused by the factors such as the drilling fluid temperature, pressure, and salinity. These issues can result in the engineering accidents such as bit sticking and wellbore instability, which are required for further investigations. This paper studies the characteristics of drilling flu

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5

Steiner, Nadja, Kumiko Azetsu-Scott, Jim Hamilton, et al. "Observed trends and climate projections affecting marine ecosystems in the Canadian Arctic." Environmental Reviews 23, no. 2 (2015): 191–239. http://dx.doi.org/10.1139/er-2014-0066.

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Past trends and future projections of key atmospheric, oceanic, sea ice, and biogeochemical variables were assessed to increase our understanding of climate change impacts on Canadian Arctic marine ecosystems. Four subbasins are evaluated: Beaufort Sea, Canadian Arctic Archipelago, Baffin Bay/Davis Strait, and Hudson Bay Complex. Limited observations, especially for ecosystem variables, compromise the trend analyses. Future projections are predominately from global models with few contributions from available marine basin scale models. The assessment indicates a significant increase in air tem

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6

MacMillan, Gwyneth Anne, John Chételat, Joel P. Heath, Raymond Mickpegak, and Marc Amyot. "Rare earth elements in freshwater, marine, and terrestrial ecosystems in the eastern Canadian Arctic." Environmental Science: Processes & Impacts 19, no. 10 (2017): 1336–45. http://dx.doi.org/10.1039/c7em00082k.

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7

Lefort, K. J., C. J. D. Matthews, J. W. Higdon, et al. "A review of Canadian Arctic killer whale (Orcinus orca) ecology." Canadian Journal of Zoology 98, no. 4 (2020): 245–53. http://dx.doi.org/10.1139/cjz-2019-0207.

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The killer whale (Orcinus orca (Linnaeus, 1758)) is a widely distributed marine predator with a broad ecological niche at the species level with evidence of specialization and narrow ecological niches among populations. Their occurrence in Canadian Arctic waters is limited by sea ice and it has been suggested that climate warming, which has caused increases in the area of ice-free water and duration of the ice-free season, has led to an increased killer whale presence during the open-water period. In this review, we summarize our knowledge of Canadian Arctic killer whale demographics and ecolo

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8

Lemmen, Donald S., Alec E. Aitken, and Robert Gilbert. "Early Holocene deglaciation of Expedition and Strand fiords, Canadian High Arctic." Canadian Journal of Earth Sciences 31, no. 6 (1994): 943–58. http://dx.doi.org/10.1139/e94-084.

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Terrestrial and marine records provide the first reconstruction of past glacial events on west-central Axel Heiberg Island. Lateral moraines along Expedition Fiord define an early Holocene ice margin when a trunk glacier occupied the inner half of the fiord. Limited sediment accumulation in the outer fiord (< 10–40 m) questions whether this ice margin records the limit of the last glaciation. Ice retreat began > 8.4 ka BP, principally by calving of an unstable ice front to a position well upvalley of the present ice limit. Rapid deglaciation is evidenced by (i) an absence of ice marginal

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9

Bell, Trevor. "The last glaciation and sea level history of Fosheim Peninsula, Ellesmere Island, Canadian High Arctic." Canadian Journal of Earth Sciences 33, no. 7 (1996): 1075–86. http://dx.doi.org/10.1139/e96-082.

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The last glaciation of Fosheim Peninsula is reconstructed on the basis of landform and sediment mapping and associated radiocarbon dates. Ice growth involved the expansion of cirque glaciers and accumulation on upland surfaces that are now ice free. Limited ice buildup, despite lowering of the paleoglaciation level by 700–800 m, is attributed to the hyperaridity of the region during glacial conditions. Marine deposits in formerly submerged basins beyond the ice margins are interpreted to represent (i) sedimentation caused by local ice buildup and marine transgression by 10.6 ka BP, (ii) increa

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10

Walker, T. R. "DEEPWATER AND FRONTIER EXPLORATION IN AUSTRALIA—HISTORICAL PERSPECTIVES, PRESENT ENVIRONMENT AND LIKELY FUTURE TRENDS." APPEA Journal 47, no. 1 (2007): 15. http://dx.doi.org/10.1071/aj06001.

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Australian deepwater (>500 m) basinal areas are generally extensions of known shallow-water basins, filled with non-marine to marginal marine sedimentary facies. True deepwater sedimentary facies are found in very few of these basins. In Australia, the transition to deep water is often associated with the edge of thick, prograding Tertiary carbonates, which have buried the inboard sediments and promoted recent hydrocarbon generation.Of ~1,040 offshore exploration wells, only 61 have been drilled in deep water, and only one in depths greater than 1,500 m. Most deepwater exploration drilling

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11

Noakes, Donald J. "Oceans of opportunity: a review of Canadian aquaculture." Marine Economics and Management 1, no. 1 (2018): 43–54. http://dx.doi.org/10.1108/maem-06-2018-002.

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Purpose The world’s population is expected to increase by 30 percent to 10bn people by 2050 and with 70 percent of the earth’s surface covered by water aquaculture will play an important role in producing food for the future. The paper aims to discuss this issue. Design/methodology/approach While Canada has the longest coastline in the world by far (202,080 km) with 80,000 km of marine coastline capable of supporting aquaculture and fisheries, it ranks only 25th in terms of world aquaculture production. The reasons are many and varied, and this review examines statistical reports and publicati

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Oliver, G. A., and S. J. Fisher. "THE PERSISTENCE AND EFFECTS OF NON-WATER-BASED DRILLING FLUIDS ON AUSTRALIA'S NORTH WEST SHELF: PROGRESS FINDINGS FROM THREE SEABED SURVEYS." APPEA Journal 39, no. 1 (1999): 647. http://dx.doi.org/10.1071/aj98044.

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The effects and persistence of non-water-based drilling fluids discharged into the marine environment were investigated at three locations on Western Australia's North West Shelf (NWS), namely the North Rankin 4A' (NRA) drilling platform, the Wanaea–6 production well and the Lynx–la exploration well. For the multiple-well drilling operation at NRA, acute biological effects at the completion of drilling were restricted to within 400 m in the direction of the prevailing current. High total petroleum hydrocarbon (TPH) concentrations within the NRA cuttings pile persisted between 1991 and 1993. Aw

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ELVIN, SANDRA S., and GAIL S. FRASER. "ADVANCING A NATIONAL STRATEGIC ENVIRONMENTAL ASSESSMENT FOR THE CANADIAN OFFSHORE OIL AND GAS INDUSTRY WITH SPECIAL EMPHASIS ON CUMULATIVE EFFECTS." Journal of Environmental Assessment Policy and Management 14, no. 03 (2012): 1250015. http://dx.doi.org/10.1142/s1464333212500159.

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Cumulative environmental effects from the offshore oil and gas industry in Canada are inadequately addressed in the Environmental Assessment process due to the complexity of analysis required to overcome unknowns with respect to offshore environments. Limited Environmental Assessments can lead to deleterious consequences for wildlife populations and their habitats dependent on offshore marine ecosystems, particularly as adverse effects become additive and synergistic. A Strategic Environmental Assessment generates guiding policies and programmes for future industrial activities, while taking e

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D’Angelo, Alessandra, Nicole Trenholm, Brice Loose, Laura Glastra, Jacob Strock, and Jongsun Kim. "Microplastics Distribution within Western Arctic Seawater and Sea Ice." Toxics 11, no. 9 (2023): 792. http://dx.doi.org/10.3390/toxics11090792.

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Microplastic pollution has emerged as a global environmental concern, exhibiting wide distribution within marine ecosystems, including the Arctic Ocean. Limited Arctic microplastic data exist from beached plastics, seabed sediments, floating plastics, and sea ice. However, no studies have examined microplastics in the sea ice of the Canadian Arctic Archipelago and Tallurutiup Imanga National Marine Conservation Area, and few have explored Arctic marginal seas’ water column. The majority of the microplastic data originates from the Eurasian Arctic, with limited data available from other regions

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15

Muir, D. E., H. I. H. Saravanamuttoo, and D. J. Marshall. "Health Monitoring of Variable Geometry Gas Turbines for the Canadian Navy." Journal of Engineering for Gas Turbines and Power 111, no. 2 (1989): 244–50. http://dx.doi.org/10.1115/1.3240243.

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The Canadian Department of National Defence has identified a need for improved Engine Health Monitoring procedures for the new Canadian Patrol Frigate (CPF). The CPF propulsion system includes two General Electric LM2500 gas turbines, a high-pressure-ratio engine with multiple stages of compressor variable geometry. A general method for predicting the thermodynamic performance of variable geometry axial compressors has been developed. The new modeling technique is based on a meanline stage-stacking analysis and relies only on the limited performance data typically made available by engine manu

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16

Chircop, Aldo, Hugh Kindred, Phillip Saunders, and David VanderZwaag. "Legislating for Integrated Marine Management: Canada’s Proposed Oceans Act of 1996." Canadian Yearbook of international Law/Annuaire canadien de droit international 33 (1996): 305–31. http://dx.doi.org/10.1017/s0069005800006111.

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SummaryBill C-26 is intended to provide for the integrated management of the oceans and marine resources within Canada’s jurisdiction. The bill sets out Canadian jurisdiction in the territorial sea, the contiguous zone, the exclusive economic zone, and the continental shelf in accordance with the United Nations Law of the Sea Convention. It defines a framework for a national oceans management strategy based on sustainable development, a precautionary approach, and integrated management plans for oceans and coastal resources and activities. These promising provisions suffer from limited commitm

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17

Thiessen, Bethany, Bram Noble, and Kevin Hanna. "Analysis of Impact Assessment Practice and Mitigation for Shipping Activity in the Eastern Canadian Arctic." ARCTIC 73, no. 2 (2020): 221–39. http://dx.doi.org/10.14430/arctic70471.

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Marine traffic is increasing in the Canadian Arctic, largely because of changing ice conditions, a growing tourism industry, and natural resource extraction. Impact assessment (IA) is a primary instrument for managing the impacts of project development in the Arctic, but there has been limited analysis of the scope and application of IA for identifying and managing the impacts of shipping. This paper examines the impacts of shipping activity associated with mining projects in the eastern Canadian Arctic, including barge traffic and resupply vessels; the mitigation actions commonly prescribed i

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18

Mc Nicholl, Darcy G., Les N. Harris, Tracey Loewen, et al. "Noteworthy occurrences among six marine species documented with community engagement in the Canadian Arctic." Animal Migration 8, no. 1 (2021): 74–83. http://dx.doi.org/10.1515/ami-2020-0113.

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Abstract Arctic marine ecosystems are changing, one aspect of which appears to be distributional expansions of sub-arctic species. For Arctic marine systems, there is limited occurrence information for many species, especially those found in restricted habitats (e.g., ice-covered, far north, or deep-water). Increasing observations through on-going Fisheries and Oceans Canada (DFO) community-based monitoring programs (e.g., Arctic Coast, Cambridge Bay Arctic Char stock assessment, Arctic Salmon, and Kugluktuk coastal surveys), community observation networks, and local media have augmented oppor

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19

Bryndum-Buchholz, A., K. Boerder, R. R. E. Stanley, et al. "A climate-resilient marine conservation network for Canada." FACETS 7 (January 1, 2022): 571–90. http://dx.doi.org/10.1139/facets-2021-0122.

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Climate change and biodiversity loss are twin crises that are driving global marine conservation efforts. However, if unaccounted for, climate change can undermine the efficacy of such efforts. Despite this, integration of climate change adaptation and resilience into spatial marine conservation and management has been limited in Canada and elsewhere. With climate change impacts becoming increasingly severe, now is the time to anticipate and reduce impacts wherever possible. We provide five recommendations for an inclusive, proactive, climate-ready approach for Canada’s growing marine conserva

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Mungall, E. L., B. Croft, M. Lizotte, et al. "Summertime sources of dimethyl sulfide in the Canadian Arctic Archipelago and Baffin Bay." Atmospheric Chemistry and Physics Discussions 15, no. 24 (2015): 35547–89. http://dx.doi.org/10.5194/acpd-15-35547-2015.

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Abstract. Dimethyl sulfide (DMS) plays a major role in the global sulfur cycle. In addition, its atmospheric oxidation products contribute to the formation and growth of atmospheric aerosol particles, thereby influencing cloud condensation nuclei (CCN) populations and thus cloud formation. The pristine summertime Arctic atmosphere is a CCN-limited regime, and is thus very susceptible to the influence of DMS. However, atmospheric DMS mixing ratios have only rarely been measured in the summertime Arctic. During July–August 2014, we conducted the first high time resolution (10 Hz) DMS mixing rati

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Sridewi, Nanthini, Siti Nurbariah, and Syahida Ahmad. "Heavy Metal Content Analysis and Toxicity Assessment of Oil-Based Drilling Mud using Zebrafish Embryos." Transactions on Maritime Science 10, no. 2 (2021): 390–95. http://dx.doi.org/10.7225/toms.v10.n02.w06.

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Aim: Used oil-based drilling muds (OBDMs) are toxic to marine organisms due to the fluid’s complex chemical nature. The illegal dumping of used OBDMs is still rampant in many parts of the world despite of the stringent laws and regulations pertaining to its disposal. To date, study of the assessment of heavy metal content in used OBDMs from the Malaysian oil and gas industry has been limited. Furthermore, the study of the toxic effect of OBDMs using a zebrafish embryo model has never been reported before. Therefore, in this research, the used oil-based drilling muds (OBDMs) were analyzed for t

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Ulfers, A., K. Hesse, C. Zeeden, et al. "Cyclostratigraphy and paleoenvironmental inference from downhole logging of sediments in tropical Lake Towuti, Indonesia." Journal of Paleolimnology 65, no. 4 (2021): 377–92. http://dx.doi.org/10.1007/s10933-020-00171-9.

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AbstractLake Towuti is located on central Sulawesi/Indonesia, within the Indo Pacific Warm Pool, a globally important region for atmospheric heat and moisture budgets. In 2015 the Towuti Drilling Project recovered more than 1000 m of drill core from the lake, along with downhole geophysical logging data from two drilling sites. The cores constitute the longest continuous lacustrine sediment succession from the Indo Pacific Warm Pool. We combined lithological descriptions with borehole logging data and used multivariate statistics to better understand the cyclic sequence, paleoenvironments, and

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Daisy, Naznin Sultana, Mohammad Hesam Hafezi, Lei Liu, and Kenneth Lee. "A Comprehensive Review of Canadian Marine Oil Spill Response System through the Lens of Decanting Regulations and Practices." Journal of Marine Science and Engineering 10, no. 9 (2022): 1310. http://dx.doi.org/10.3390/jmse10091310.

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Marine oil spill response operations could generate a large volume of liquid oily wastes (e.g., emulsified oil, non-emulsified oil, and wastewater) that can be up to 30 to 40 times greater than the original volume of spilled oil. Oil decanting technologies are used globally for recovering spilled oil and handling liquid wastes. Canada follows the standards set out in the MARPOL 73/78 Annex 1 International regulations in most areas, with more strict discharge requirements in certain locations. For instance, inland waters discharge should not exceed 5 ppm, and in special areas, such as the Great

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Wang, Jianhua, Hongyu Ye, Jingyu Chen, et al. "Marine Natural Gas Hydrate Self-Entry Exploitation Device: Evaluation of Production Enhancement Measures." Journal of Marine Science and Engineering 11, no. 3 (2023): 543. http://dx.doi.org/10.3390/jmse11030543.

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Test exploitation equipment and technology have progressed considerably in marine natural gas hydrate (NGH) exploitation, but many critical technical issues still need to be resolved before commercial production. Previous studies have proposed a non-drilling exploitation device—a self-entry exploitation device (SEED)—but reaching the NGH commercial exploitation threshold in its initial state is difficult. Consequently, we verified and evaluated some production enhancement measures to improve the exploitation system of the SEED. In this study, based on the geological data from the SHSC-4 site i

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Kong, Lulin, Haige Wang, Longlian Cui, Xiangguo Zhao, LiangYu Rao, and Shupin Zhang. "Drilling Optimization for Ultra-long Slim Hole Horizontal Wells in Duvernay Shale project, Canada." Journal of Physics: Conference Series 2834, no. 1 (2024): 012085. http://dx.doi.org/10.1088/1742-6596/2834/1/012085.

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Abstract Objective/Scope(30-75): Drilling contractors have always strived to pursue higher single well production and lower well-construction cost in order to achieve higher return on investment. Efforts have been made in recent years to break technological barriers to create ultra-long(>3500m) slim hole horizontal wells in Duvernay shale project. However, there were many challenges while extending the 6.75-in. slim hole laterals, such as 1) difficulty in weight transfer regarding motor slide drilling, 2) high down-hole friction torque and high ECD, 3) short servicing life and low efficienc

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Roney, Nancy E., Anna Kuparinen, and Jeffrey A. Hutchings. "Comparative analysis of abundance–occupancy relationships for species at risk at both broad taxonomic and spatial scales." Canadian Journal of Zoology 93, no. 7 (2015): 515–19. http://dx.doi.org/10.1139/cjz-2014-0318.

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The abundance–occupancy relationship is one of the most well-examined relationships in ecology. At the species level, a positive association has been widely documented. However, until recently, research on the nature of this relationship at broad taxonomic and spatial scales has been limited. Here, we perform a comparative analysis of 12 taxonomic groups across a large spatial scale (Canada), using data on Canadian species at risk: amphibians, arthropods, birds, freshwater fishes, lichens, marine fishes, marine mammals, molluscs, mosses, reptiles, terrestrial mammals, and vascular plants. We f

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Somasekharan, Syam Prakash, Amal El-Naggar, Poul H. Sorensen, Yuzhuo Wang, and Hongwei Cheng. "An Aqueous Extract of Marine Microalgae Exhibits Antimetastatic Activity through Preferential Killing of Suspended Cancer Cells and Anticolony Forming Activity." Evidence-Based Complementary and Alternative Medicine 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/9730654.

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Research on marine natural products as potential anticancer agents is still limited. In the present study, an aqueous extract of a Canadian marine microalgal preparation was assessed for anticancer activities using various assays and cell lines of human cancers, including lung, prostate, stomach, breast, and pancreatic cancers, as well as an osteosarcoma.In vitro, the microalgal extract exhibited marked anticolony forming activity. In addition, it was more toxic, as indicated by increased apoptosis, to nonadherent cells (grown in suspension) than to adherent cells.In vivo, an antimetastatic ef

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Birk, A. M., and W. R. Davis. "Suppressing the Infrared Signatures of Marine Gas Turbines." Journal of Engineering for Gas Turbines and Power 111, no. 1 (1989): 123–29. http://dx.doi.org/10.1115/1.3240210.

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The exhaust plumes and visible areas of the engine exhaust ducting associated with marine gas turbines are major sources of infrared (IR) radiation on ships. These high-radiance sources make excellent targets for IR-guided threats. In recent years significant efforts have been made to reduce or eliminate these high-radiance sources to increase the survivability of naval and commercial ships when sailing in high-risk areas of the world. Typical IR signature suppression (IRSS) systems incorporate film cooling of visible metal sources, optical blockage to eliminate direct line-of-sight visibility

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Ramani, Tara, Rohit Jaikumar, Haneen Khreis, Mathieu Rouleau, and Nick Charman. "Air Quality and Health Impacts of Freight Modal Shifts: Review and Assessment." Transportation Research Record: Journal of the Transportation Research Board 2673, no. 3 (2019): 153–64. http://dx.doi.org/10.1177/0361198119834008.

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Freight movement is a significant and growing contributor to transportation emissions globally. Modal shifts in freight, that is, moving freight from a higher emission mode to one associated with lower emissions, are discussed as a strategy to reduce emissions of criteria pollutants and greenhouse gases (GHGs). However, there is limited knowledge of the magnitude of potential benefits and their impacts on human health. The overall goal of this study is to identify and characterize the potential of modal shifts in freight transport for mitigating air pollutant emissions, air pollutant concentra

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Bernier, Natacha B., Jose-Henrique G. M. Alves, Hendrik Tolman, et al. "Operational Wave Prediction System at Environment Canada: Going Global to Improve Regional Forecast Skill." Weather and Forecasting 31, no. 2 (2016): 353–70. http://dx.doi.org/10.1175/waf-d-15-0087.1.

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Abstract A global deterministic wave prediction system (GDWPS) is used to improve regional forecasts of waves off the Canadian coastline and help support the practice of safe marine activities in Canadian waters. The wave model has a grid spacing of ¼° with spectral resolution of 36 frequency bins and 36 directional bins. The wave model is driven with hourly 10-m winds generated by the operational global atmospheric prediction system. Ice conditions are updated every three hours using the ice concentration forecasts generated by the Global Ice–Ocean Prediction System. Wave forecasts are evalua

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Irish, Victoria E., Sarah J. Hanna, Yu Xi, et al. "Revisiting properties and concentrations of ice-nucleating particles in the sea surface microlayer and bulk seawater in the Canadian Arctic during summer." Atmospheric Chemistry and Physics 19, no. 11 (2019): 7775–87. http://dx.doi.org/10.5194/acp-19-7775-2019.

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Abstract. Despite growing evidence that the ocean is an important source of ice-nucleating particles (INPs) in the atmosphere, our understanding of the properties and concentrations of INPs in ocean surface waters remains limited. We have investigated INPs in sea surface microlayer and bulk seawater samples collected in the Canadian Arctic during the summer of 2016. Consistent with our 2014 studies, we observed that INPs were ubiquitous in the microlayer and bulk seawaters; heat and filtration treatments reduced INP activity, indicating that the INPs were likely heat-labile biological material

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Yang, Duo, Harold Ritchie, Serge Desjardins, Garry Pearson, Allan MacAfee, and Ismail Gultepe. "High-Resolution GEM-LAM Application in Marine Fog Prediction: Evaluation and Diagnosis." Weather and Forecasting 25, no. 2 (2010): 727–48. http://dx.doi.org/10.1175/2009waf2222337.1.

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Abstract A three-level nested rendering of a high-resolution limited-area model version of the Global Environment Multiscale configuration (GEM-LAM), running quasi-operationally at the Canadian Meteorological Centre, is evaluated for its capabilities in marine fog prediction. The model shows a general underestimation of the cloud water content at lower levels that is utilized as one of the proxies for fog and/or low stratus. A warm and dry tendency also appears at the lowest layer (a few hundreds of meters above the surface) of the vertical profiles and at screen level. The condensation scheme

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Khan, R. A. "Hematozoa of marine fish from Ungava Bay and adjacent northwestern Atlantic Ocean." Canadian Journal of Zoology 64, no. 1 (1986): 153–57. http://dx.doi.org/10.1139/z86-024.

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Blood of marine fish and gastrointestinal contents of piscivorous leeches from Ungava Bay and northern Labrador were examined for hematozoans and compared with samples taken from southern Labrador during 1982–1983. A limited number of fish from Ellesmere Island in the Canadian Arctic were also examined for hematozoans. Prevalence of trypanosome and piroplasm infections was greater in fish taken from Ungava Bay than in those from northern or southern Labrador whereas hemogregarines infected more fish in the latter area. Similarly, prevalence of trypanosome infections in the leech Johanssonia ar

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Catuneanu, Octavian, and Arthur R. Sweet. "Maastrichtian-Paleocene foreland-basin stratigraphies, western Canada: a reciprocal sequence architecture." Canadian Journal of Earth Sciences 36, no. 5 (1999): 685–703. http://dx.doi.org/10.1139/e98-018.

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Palynological and magnetostratigraphic chronostratigraphic correlations of lower Maastrichtian to Paleocene strata along an east-west Western Canada Basin transect allow for the recognition of a reciprocal sequence architecture in nonmarine strata. Reference sections include three Canadian Continental Drilling Program Cretaceous-Tertiary Boundary Project core holes and outcrops in Alberta, southern Saskatchewan, and north-central Montana. The spatial and temporal position of the third-order sequences provides evidence for the correlation of proximal sector regional disconformities and sediment

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Van Vessem, E. J., and T. L. Gan. "The Ninian Field, Blocks 3/3 & 3/8, UK North Sea." Geological Society, London, Memoirs 14, no. 1 (1991): 175–82. http://dx.doi.org/10.1144/gsl.mem.1991.014.01.22.

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AbstractThe Ninian Field, located in the northern North Sea, lies in the East Shetland Basin on the west side of the Viking Graben. The field straddles Blocks 3/3 and 3/8 and is developed under a unitization agreement with Chevron UK Limited as operator. The structure is a westward tilted fault block. The estimated original oil-in-place contained in the marine-deltaic sandstones of the Middle Jurassic Brent Group, is 2920 MMBBL, of which an estimated 35 to 40% is recoverable. The oil is a paraffinic-naphthenic type with an API gravity of 36°. The field development consists of three fixed platf

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Murphy, Gary, Vanessa Brown, and Denes Vigh. "Land FWI in the Delaware Basin, west Texas: A case study." Leading Edge 39, no. 5 (2020): 324–31. http://dx.doi.org/10.1190/tle39050324.1.

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As part of a wide-reaching full-waveform inversion (FWI) research program, FWI is applied to an onshore seismic data set collected in the Delaware Basin, west Texas. FWI is routinely applied on typical marine data sets with high signal-to-noise ratio (S/N), relatively good low-frequency content, and reasonably long offsets. Land seismic data sets, in comparison, present significant challenges for FWI due to low S/N, a dearth of low frequencies, and limited offsets. Recent advancements in FWI overcome limitations due to poor S/N and low frequencies making land FWI feasible to use to update the

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Wentworth, G. R., J. G. Murphy, B. Croft, et al. "Ammonia in the summertime Arctic marine boundary layer: sources, sinks and implications." Atmospheric Chemistry and Physics Discussions 15, no. 21 (2015): 29973–30016. http://dx.doi.org/10.5194/acpd-15-29973-2015.

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Abstract. Continuous hourly measurements of gas-phase ammonia (NH3(g)) were taken from 13 July to 7 August 2014 on a research cruise throughout Baffin Bay and the eastern Canadian Arctic Archipelago. Concentrations ranged from 30–650 ng m−3 (40–870 pptv) with the highest values recorded in Lancaster Sound (74°13' N, 84°00' W). Simultaneous measurements of total ammonium ([NHx]), pH and temperature in the ocean and in melt ponds were used to compute the compensation point (χ), which is the ambient NH3(g) concentration at which surface–air fluxes change direction. Ambient NH3(g) was usually seve

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Wentworth, Gregory R., Jennifer G. Murphy, Betty Croft, et al. "Ammonia in the summertime Arctic marine boundary layer: sources, sinks, and implications." Atmospheric Chemistry and Physics 16, no. 4 (2016): 1937–53. http://dx.doi.org/10.5194/acp-16-1937-2016.

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Abstract. Continuous hourly measurements of gas-phase ammonia (NH3(g)) were taken from 13 July to 7 August 2014 on a research cruise throughout Baffin Bay and the eastern Canadian Arctic Archipelago. Concentrations ranged from 30 to 650 ng m−3 (40–870 pptv) with the highest values recorded in Lancaster Sound (74°13′ N, 84°00′ W). Simultaneous measurements of total ammonium ([NHx]), pH and temperature in the ocean and in melt ponds were used to compute the compensation point (χ), which is the ambient NH3(g) concentration at which surface–air fluxes change direction. Ambient NH3(g) was usually s

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Sikes, Derek S., Matthew Bowser, John M. Morton, Casey Bickford, Sarah Meierotto, and Kyndall Hildebrandt. "Building a DNA barcode library of Alaska’s non-marine arthropods." Genome 60, no. 3 (2017): 248–59. http://dx.doi.org/10.1139/gen-2015-0203.

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Climate change may result in ecological futures with novel species assemblages, trophic mismatch, and mass extinction. Alaska has a limited taxonomic workforce to address these changes. We are building a DNA barcode library to facilitate a metabarcoding approach to monitoring non-marine arthropods. Working with the Canadian Centre for DNA Barcoding, we obtained DNA barcodes from recently collected and authoritatively identified specimens in the University of Alaska Museum (UAM) Insect Collection and the Kenai National Wildlife Refuge collection. We submitted tissues from 4776 specimens, of whi

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Ricard, Daniel, Robert M. Branton, Donald W. Clark, and Peter Hurley. "Extracting groundfish survey indices from the Ocean Biogeographic Information System (OBIS): an example from Fisheries and Oceans Canada." ICES Journal of Marine Science 67, no. 4 (2009): 638–45. http://dx.doi.org/10.1093/icesjms/fsp275.

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Abstract Ricard, D., Branton, R. M., Clark, D. W., and Hurley, P. 2010. Extracting groundfish survey indices from the Ocean Biogeographic Information System (OBIS): an example from Fisheries and Oceans Canada. – ICES Journal of Marine Science, 67: 638–645. Scientific trawl surveys have been conducted in different regions of the world and by a variety of countries and agencies since the mid-1900s. Although the data are collected in a scientifically and statistically appropriate context and represent an important source of fishery-independent information for agency-specific stock assessments, th

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Glaviano, Francesca, Roberta Esposito, Anna Di Cosmo, et al. "Management and Sustainable Exploitation of Marine Environments through Smart Monitoring and Automation." Journal of Marine Science and Engineering 10, no. 2 (2022): 297. http://dx.doi.org/10.3390/jmse10020297.

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Monitoring of aquatic ecosystems has been historically accomplished by intensive campaigns of direct measurements (by probes and other boat instruments) and indirect extensive methods such as aero-photogrammetry and satellite detection. These measurements characterized the research in the last century, with significant but limited improvements within those technological boundaries. The newest advances in the field of smart devices and increased networking capabilities provided by emerging tools, such as the Internet of Things (IoT), offer increasing opportunities to provide accurate and precis

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Preusser, Frank, Matthias Büschelberger, Hans Axel Kemna, Johannes Miocic, Daniela Mueller, and Jan-Hendrik May. "Exploring possible links between Quaternary aggradation in the Upper Rhine Graben and the glaciation history of northern Switzerland." International Journal of Earth Sciences 110, no. 5 (2021): 1827–46. http://dx.doi.org/10.1007/s00531-021-02043-7.

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AbstractThe Quaternary filling of the Upper Rhine Graben is an excellent archive to reconstruct sediment dynamics in response to climate change, in particular related to past glaciations of the Swiss Alpine Foreland. Here, a sediment sequence recovered by drilling for exploration purposes near Kronau is investigated, using a combination of sedimentological logging, provenance studies (heavy minerals and clast petrography), and luminescence dating. Several phases of coarse sediment aggradation are identified that possibly correlate to Marine Isotope Stages (MIS) 12 (478–424 ka), 10 (374–337 ka)

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Kulessa, Bernd, and Tavi Murray. "Slug-test derived differences in bed hydraulic properties between a surge-type and a non-surge-type Svalbard glacier." Annals of Glaciology 36 (2003): 103–9. http://dx.doi.org/10.3189/172756403781816257.

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AbstractWe investigate the differences in subglacial hydraulic properties between Bakaninbreen, a surge-type glacier in southern Svalbard, and midre Lovénbreen, a non-surge-type glacier in northwest Svalbard, using slug tests. At Bakaninbreen, underlain by fine-grained glacial till and marine sediments, slug-test responses were underdamped and are analyzed with the Van der Kamp method using a fully penetrating screen. At midre Lovénbreen, underlain by metres-thick permafrost consisting of coarse clasts, ice and water, slug-test responses were overdamped and are analyzed with the Butler–Garnett

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McGrath, CDR Gabrielle G. "Preventing a Nationally-Significant Oil Spill on the Grand Banks of Newfoundland." International Oil Spill Conference Proceedings 2014, no. 1 (2014): 1226–38. http://dx.doi.org/10.7901/2169-3358-2014.1.1226.

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ABSTRACT As the Arctic becomes more heavily populated and more open to commercial shipping operations, the threat of an oil spill increases. On the Grand Banks of Newfoundland, both fixed and mobile oil rigs drill for the region's highly lucrative natural oil resources. This region also happens to be one of the most dangerous shipping areas in the world. The cold Labrador Current travels south from the Arctic bringing with it icebergs calved from the glaciers along the Western Greenland coast. As these icebergs travel south, they intersect directly with the transatlantic shipping lanes followi

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Quinn, Brady K. "Dramatic decline and limited recovery of a green crab (Carcinus maenas) population in the Minas Basin, Canada after the summer of 2013." PeerJ 6 (September 17, 2018): e5566. http://dx.doi.org/10.7717/peerj.5566.

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This paper reports the results of a ten-year monitoring program of an Atlantic Canadian population of green crabs, Carcinus maenas, in the Minas Basin of the Bay of Fundy. Intertidal densities, sex and reproductive ratios, juvenile recruitment, subtidal catch-per-unit-effort (CPUE), and sizes of crabs in this population were recorded from 2008 to 2017. In 2013 intertidal densities, mean crab sizes, subtidal CPUE, and proportions of crabs mature and reproducing all dramatically decreased to all-time lows, and large crabs virtually disappeared from the population. From 2014 to 2017 the populatio

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Scrosati, Ricardo A., and Julius A. Ellrich. "A 5-year study (2014–2018) of the relationship between coastal phytoplankton abundance and intertidal barnacle size along the Atlantic Canadian coast." PeerJ 7 (May 2, 2019): e6892. http://dx.doi.org/10.7717/peerj.6892.

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Benthic–pelagic coupling refers to the ecological relationships between benthic and pelagic environments. Studying such links is particularly useful to understand biological variation in intertidal organisms along marine coasts. Filter-feeding invertebrates are ecologically important on marine rocky shores, so they have often been used to investigate benthic–pelagic coupling. Most studies, however, have been conducted on eastern ocean boundaries. To evaluate benthic–pelagic coupling on a western ocean boundary, we conducted a 5-year study spanning 415 km of the Atlantic coast of Nova Scotia (C

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Gong, Wanmin, Stephen R. Beagley, Sophie Cousineau, et al. "Assessing the impact of shipping emissions on air pollution in the Canadian Arctic and northern regions: current and future modelled scenarios." Atmospheric Chemistry and Physics 18, no. 22 (2018): 16653–87. http://dx.doi.org/10.5194/acp-18-16653-2018.

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Abstract. A first regional assessment of the impact of shipping emissions on air pollution in the Canadian Arctic and northern regions was conducted in this study. Model simulations were carried out on a limited-area domain (at 15 km horizontal resolution) centred over the Canadian Arctic, using the Environment and Climate Change Canada's on-line air quality forecast model, GEM-MACH (Global Environmental Multi-scale – Modelling Air quality and CHemistry), to investigate the contribution from the marine shipping emissions over the Canadian Arctic waters (at both present and projected future lev

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Ward, Brent C., Jeffrey D. Bond, and John C. Gosse. "Evidence for a 55–50 ka (early Wisconsin) glaciation of the Cordilleran ice sheet, Yukon Territory, Canada." Quaternary Research 68, no. 1 (2007): 141–50. http://dx.doi.org/10.1016/j.yqres.2007.04.002.

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AbstractCosmogenic 10Be ages on boulders of 54–51 ka (n=4) on a penultimate Cordilleran ice sheet (CIS) drift confirm that Marine Oxygen Isotope Stage (MIS) 4 (early Wisconsin) glaciation was extensive in parts of Yukon Territory, the first confirmed evidence in the Canadian Cordillera. We name the glaciation inferred from the mapped and dated drift the Gladstone. These results are in apparent contrast to the MIS 6 (Illinoian) age of the penultimate Reid glaciation to the east in central Yukon but are equivalent to exposure ages on MIS 4 drift in Alaska. Contrasting penultimate ice extents in

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MacRitchie, Colin, and Mohamed K. Zobaa. "Multiproxy sedimentary organic matter analysis of the upper Wolfcamp Formation in the Collier-1201 well, southeastern Delaware Basin, Texas." Interpretation 7, no. 4 (2019): SK45—SK52. http://dx.doi.org/10.1190/int-2019-0043.1.

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Horizontal drilling and multistage fracturing designs have recently made the Wolfcamp shale horizons a highly sought-after and low-cost oil opportunity at a time of market volatility. One current challenge is that the Wolfcamp shale horizons are unpredictable, especially in acreages with limited well control and seismic data. Sedimentary organic matter (palynofacies) analysis can delineate thermal maturity windows, determine kerogen types, and reflect depositional environments to aid in realizing hydrocarbon potential. We palynologically processed 16 samples at roughly 3 m intervals from the u

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Arai, Kohma, Martin Castonguay, Vyacheslav Lyubchich, and David H. Secor. "Integrating machine learning with otolith isoscapes: Reconstructing connectivity of a marine fish over four decades." PLOS ONE 18, no. 5 (2023): e0285702. http://dx.doi.org/10.1371/journal.pone.0285702.

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Stable isotopes are an important tool to uncover animal migration. Geographic natal assignments often require categorizing the spatial domain through a nominal approach, which can introduce bias given the continuous nature of these tracers. Stable isotopes predicted over a spatial gradient (i.e., isoscapes) allow a probabilistic and continuous assignment of origin across space, although applications to marine organisms remain limited. We present a new framework that integrates nominal and continuous assignment approaches by (1) developing a machine-learning multi-model ensemble classifier usin

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