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Artykuły w czasopismach na temat „Estuarine processes”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 28 stycznia 2023

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1

Silva, Alex Evaristo da, Pedro Smith Menandro, Kleverson Alencastre Do Nascimento, Valéria Da S. Quaresma, and Alex C. Bastos. "INTERPRETATION OF SEDIMENTARY PROCESSES USING ECHO-CHARACTER DISTRIBUTION: CASE STUDY OF PIRAQUÊ-AÇU AND PIRAQUÊ-MIRIM ESTUARINE SYSTEM, ARACRUZ – ES (BRAZIL)." Revista Brasileira de Geofísica 32, no. 2 (June 1, 2014): 301. http://dx.doi.org/10.22564/rbgf.v32i2.484.

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ABSTRACT. This research aimed to map distinct types of echo-character in order to recognize estuarine sedimentary processes along the Piraquê-Açu System, in Aracruz, Espírito Santo State, Brazil. Echo-character mapping was undertaken using high frequency sub-bottom profiling data. Four echo-character (EC1, EC2, EC3,EC4) patterns were recognized by combining sub-bottom and surficial sedimentological data. These EC patterns defined three distinct areas within the system that arecharacterized by the predominance of a specific echo-character and a seabed type: i) estuarine mouth, where sand beds w

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Bernardino, Angelo Fraga, Paulo Roberto Pagliosa, Ronaldo Adriano Christofoletti, Francisco Barros, Sergio A. Netto, Pablo Muniz, and Paulo da Cunha Lana. "Benthic estuarine communities in Brazil: moving forward to long term studies to assess climate change impacts." Brazilian Journal of Oceanography 64, spe2 (2016): 81–96. http://dx.doi.org/10.1590/s1679-875920160849064sp2.

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Abstract Estuaries are unique coastal ecosystems that sustain and provide essential ecological services for mankind. Estuarine ecosystems include a variety of habitats with their own sediment-fauna dynamics, all of them globally undergoing alteration or threatened by human activities. Mangrove forests, saltmarshes, tidal flats and other confined estuarine systems are under increasing stress due to human activities leading to habitat and species loss. Combined changes in estuarine hydromorphology and in climate pose severe threats to estuarine ecosystems on a global scale. The ReBentos network

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Laruelle, Goulven Gildas, Nicolas Goossens, Sandra Arndt, Wei-Jun Cai, and Pierre Regnier. "Air–water CO<sub>2</sub> evasion from US East Coast estuaries." Biogeosciences 14, no. 9 (May 15, 2017): 2441–68. http://dx.doi.org/10.5194/bg-14-2441-2017.

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Abstract. This study presents the first regional-scale assessment of estuarine CO2 evasion along the US East Coast (25–45° N). The focus is on 42 tidal estuaries, which together drain a catchment of 697 000 km2 or 76 % of the total area within this latitudinal band. The approach is based on the Carbon–Generic Estuary Model (C-GEM) that allows the simulation of hydrodynamics, transport, and biogeochemistry for a wide range of estuarine systems using readily available geometric parameters and global databases of seasonal climatic, hydraulic, and riverine biogeochemical information. Our simulatio

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Le Vu, Hong, and Ron Johnstone. "Anthropogenic Impacts on Biochemical Processes in a Tropical Estuarine Lagoon." International Journal of Engineering Technology and Sciences 5, no. 2 (August 1, 2018): 102–6. http://dx.doi.org/10.15282/ijets.v5i2.1401.

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Estuaries play an invaluable role in the transformation and cycling of materials as they move between land and sea; including anthropogenic materials. Increasingly, human land use is delivering material loads that risk overwhelming the normal functions that these ecosystems provide. In this context, the objective of this study is to assess key biogeochemical processes to understand the connections of anthropogenic activities on ecosystem performance in a tropical estuarine lagoon system. This research focuses on a case study area, Dong Ho lagoon in Vietnam, which exemplifies the anthropogenic

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Wei, Xi, Josette Garnier, Vincent Thieu, Paul Passy, Romain Le Gendre, Gilles Billen, Maia Akopian, and Goulven Gildas Laruelle. "Nutrient transport and transformation in macrotidal estuaries of the French Atlantic coast: a modeling approach using the Carbon-Generic Estuarine Model." Biogeosciences 19, no. 3 (February 15, 2022): 931–55. http://dx.doi.org/10.5194/bg-19-931-2022.

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Abstract. Estuaries are key reactive ecosystems along the land–ocean aquatic continuum, with significant ecological and economic value. However, they have been facing strong morphological management changes and increased nutrient and contaminant inputs, possibly leading to ecological problems such as coastal eutrophication. Therefore, it is necessary to quantify the import and export fluxes of the estuaries, their retention capacity, and estuarine eutrophication potential. The 1-D Carbon-Generic Estuary Model (C-GEM) was used to simulate the transient hydrodynamics, transport, and biogeochemis

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Moore-Maley, Benjamin L., Debby Ianson, and Susan E. Allen. "The sensitivity of estuarine aragonite saturation state and pH to the carbonate chemistry of a freshet-dominated river." Biogeosciences 15, no. 12 (June 20, 2018): 3743–60. http://dx.doi.org/10.5194/bg-15-3743-2018.

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Abstract. Ocean acidification threatens to reduce pH and aragonite saturation state (ΩA) in estuaries, potentially damaging their ecosystems. However, the impact of highly variable river total alkalinity (TA) and dissolved inorganic carbon (DIC) on pH and ΩA in these estuaries is unknown. We assess the sensitivity of estuarine surface pH and ΩA to river TA and DIC using a coupled biogeochemical model of the Strait of Georgia on the Canadian Pacific coast and place the results in the context of global rivers. The productive Strait of Georgia estuary has a large, seasonally variable freshwater i

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Silva Junior, Milton Goncalves, Antonio Carlos Leal Castro, and Ulrich Saint-Paul. "Comparative Analysis of Distribution of Intertidal Fish Assemblages in Different Estuarine Systems on Northern Coast of Brazil." Journal of Sustainable Development 10, no. 2 (March 30, 2017): 26. http://dx.doi.org/10.5539/jsd.v10n2p26.

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The northern coast of Brazil has more than 30 estuaries distributed along 650 km of coastline. These conditions favor the presence of relatively large fish communities in estuarine environments, but published information on the fish fauna in tidal creeks in northern Brazil is only available for some mangrove systems, and comparative studies between fish estuarine communities in different tidal creeks are less common. The choice of the study area was based on the fact that it has been poorly investigated with regard to estuarine fish fauna in comparison in mangrove tidal creeks using the same f

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Lange, Xaver, and Hans Burchard. "The Relative Importance of Wind Straining and Gravitational Forcing in Driving Exchange Flows in Tidally Energetic Estuaries." Journal of Physical Oceanography 49, no. 3 (March 2019): 723–36. http://dx.doi.org/10.1175/jpo-d-18-0014.1.

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AbstractIn straight tidal estuaries, residual overturning circulation results mainly from a competition between gravitational forcing, wind forcing, and friction. To systematically investigate this for tidally energetic estuaries, the dynamics of estuarine cross sections is analyzed in terms of the relation between gravitational forcing, wind stress, and the strength of estuarine circulation. A system-dependent basic Wedderburn number is defined as the ratio between wind forcing and opposing gravitational forcing at which the estuarine circulation changes sign. An analytical steady-state solut

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Burchard, Hans, and Henk M. Schuttelaars. "Analysis of Tidal Straining as Driver for Estuarine Circulation in Well-Mixed Estuaries." Journal of Physical Oceanography 42, no. 2 (February 1, 2012): 261–71. http://dx.doi.org/10.1175/jpo-d-11-0110.1.

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Abstract Tidal straining, which can mathematically be described as the covariance between eddy viscosity and vertical shear of the along-channel velocity component, has been acknowledged as one of the major drivers for estuarine circulation in channelized tidally energetic estuaries. In this paper, the authors investigate the role of lateral circulation for generating this covariance. Five numerical experiments are carried out, starting with a reference scenario including the full physics and four scenarios in which specific key physical processes are neglected. These processes are longitudina

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Grégoire, Marilaure. "Coastal and estuarine fine sediment processes." Journal of Marine Systems 37, no. 4 (November 2002): 300–302. http://dx.doi.org/10.1016/s0924-7963(02)00181-1.

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Aranda, María, Francisco Javier Gracia, and Gloria Peralta. "Estuarine Mapping and Eco-Geomorphological Characterization for Potential Application in Conservation and Management: Three Study Cases along the Iberian Coast." Applied Sciences 10, no. 13 (June 27, 2020): 4429. http://dx.doi.org/10.3390/app10134429.

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Geomorphological changes in recent decades in three estuaries along the Iberian coast were analysed using aerial orthophotographs. A hierarchical classification scheme, based on a literature review representing 26 estuarine eco-geomorphological features relevant to estuarine dynamics and functioning, is described. The estuaries selected were San Vicente de la Barquera (N Spain), Guadiana River (SW border between Spain and Portugal) and the Ebro River Delta mouth (NE Spain). For these systems, a 60-year time series of high-resolution maps was developed, analysing the changes in feature surfaces

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Xu, Chaobin, Mengting Qi, Weisheng Lin, and Xiaofei Li. "Nitrous Oxide from Abiotic Processes of Hydroxylamine and Nitrite in Estuarine and Coastal Ecosystems: A Review." Journal of Marine Science and Engineering 10, no. 5 (May 2, 2022): 623. http://dx.doi.org/10.3390/jmse10050623.

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Abiotic processes of nitrogen (N) are suggested to contribute to nitrous oxide (N2O) production; however, the important role of these processes in N2O emissions is invariably ignored. This review synthesized the main abiotic processes of hydroxylamine and nitrite and associated biogeochemical controls in estuarine and coastal ecosystems. Abiotic processes of hydroxylamine and nitrite are availably detected in estuarine and coastal environments. The abiotic processes of hydroxylamine contribute more to N2O production than the abiotic processes of nitrite in estuarine and coastal environments, s

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Lawson, Stephan Korblah, Hitoshi Tanaka, Keiko Udo, Nguyen Trong Hiep, and Nguyen Xuan Tinh. "Morphodynamics and Evolution of Estuarine Sandspits along the Bight of Benin Coast, West Africa." Water 13, no. 21 (October 21, 2021): 2977. http://dx.doi.org/10.3390/w13212977.

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It is well known that estuarine systems are significantly affected by hydrodynamic conditions such as river discharge, storm surges, waves and tidal conditions. In addition to this, human interferences through developmental projects have the capability of disrupting the natural morphological processes occurring at estuaries. In West Africa, the goal to improve standards of living through large-scale dam construction, offshore ports and coastal erosion countermeasures has triggered alarming changes in the morphodynamics of estuarine systems. The estuaries at the Volta River mouth (Ghana) and “B

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Santos, Sindiany Suelen Caduda dos, Edilson Divino de Araújo, and Rosemeri Melo e Souza. "Análise dos Tensores Antropogênicos dos Mangues no Complexo Estuarino Real- Piauí-Fundo, sul de Sergipe." Revista Brasileira de Geografia Física 14, no. 3 (July 20, 2021): 1690. http://dx.doi.org/10.26848/rbgf.v14.3.p1690-1706.

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Os mangues do litoral sul de Sergipe sobrevivem em meio à presença de tensores antropogênicos comprometedores da existência do ecossistema manguezal. Objetiva-se analisar os tensores antropogênicos que afetam os mangues Avicennia schaueriana Stapf. & Leech, Laguncularia racemosa (L.) Gaertn.f. e Rhizophora mangle L. e os níveis de vulnerabilidade decorrentes da tensão, no complexo estuarino Real-Piauí-Fundo/ Sergipe. Mediante adaptações na metodologia de Laranjeira e de Oliveira com Melo e Souza, foram determinadas características definidoras da transformação dos mangues. Os tensores foram

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Gomes, Vando J. C., Nils E. Asp, Eduardo Siegle, José Diego Gomes, Ariane M. M. Silva, Andrea S. Ogston, and Charles A. Nittrouer. "Suspended-Sediment Distribution Patterns in Tide-Dominated Estuaries on the Eastern Amazon Coast: Geomorphic Controls of Turbidity-Maxima Formation." Water 13, no. 11 (June 1, 2021): 1568. http://dx.doi.org/10.3390/w13111568.

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In tide-dominated estuaries, maximum-turbidity zones (MTZs) are common and prominent features, characterized by a peak in suspended-sediment concentration (SSC) associated with estuarine processes. The Brazilian Amazon coast includes many estuaries, experiencing macrotidal conditions. MTZs are expected to occur and are crucial for sediment delivery to the longest continuous mangrove belt of the world. The area is under influence of the Amazon River plume (ARP), the main SSC source, as local rivers do not deliver substantial sediment supply. To assess the processes that allow the ARP to supply

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Nayak, Ganapati Narayan. "Changing Tropical Estuarine Sedimentary Environments with Time and Metals Contamination, Cest Coast of India." Journal of The Indian Association of Sedimentologists 38, no. 2 (December 31, 2021): 63–78. http://dx.doi.org/10.51710/jias.v38i2.141.

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Estuaries are one of the major sub-environments of the coastal zone wherein freshwaters interact and mix with saline waters, and facilitate deposition of finer sediments, organic matter, and metals. Intertidal mudflat and mangrove sediment cores collected from estuaries along the central west coast of India were investigated for various sedimentological and geochemical parameters to understand the changes in the sedimentary depositional environments and various factors influencing the processes. Additionally, estuarine biota was examined to understand the bioaccumulation of metals with respect

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Huang, Weihao, Wenping Gong, Heng Zhang, Zhengbo Jia, Zhenyu Huang, Lei Zhu, and Jiahuan Liu. "Stochasticity in the estuarine sediment erosion processes." Continental Shelf Research 225 (August 2021): 104479. http://dx.doi.org/10.1016/j.csr.2021.104479.

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Ortega, T., J. M. Forja, and A. Gómez-Parra. "Teaching Estuarine Chemical Processes by Laboratory Simulation." Journal of Chemical Education 78, no. 6 (June 2001): 771. http://dx.doi.org/10.1021/ed078p771.

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Bernhard, Anne E., and Annette Bollmann. "Estuarine nitrifiers: New players, patterns and processes." Estuarine, Coastal and Shelf Science 88, no. 1 (June 2010): 1–11. http://dx.doi.org/10.1016/j.ecss.2010.01.023.

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Ji, Z. G., M. R. Morton, and J. M. Hamrick. "Wetting and Drying Simulation of Estuarine Processes." Estuarine, Coastal and Shelf Science 53, no. 5 (November 2001): 683–700. http://dx.doi.org/10.1006/ecss.2001.0818.

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Dijkstra, Yoeri M., and Henk M. Schuttelaars. "A Unifying Approach to Subtidal Salt Intrusion Modeling in Tidal Estuaries." Journal of Physical Oceanography 51, no. 1 (January 2021): 147–67. http://dx.doi.org/10.1175/jpo-d-20-0006.1.

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AbstractThe salinity structure in estuaries is classically described in terms of the salinity structure as well mixed, partially mixed, or salt wedge. The existing knowledge about the processes that result in such salinity structures comes from highly idealized models that are restricted to either well-mixed and partially mixed cases or subtidal salt wedge estuaries. Hence, there is still little knowledge about the processes driving transitions between these different salinity structures and the estuarine parameters at which such a transition is found. As an important step toward a unified des

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Volta, C., S. Arndt, H. H. G. Savenije, G. G. Laruelle, and P. Regnier. "C-GEM (v 1.0): a new, cost-efficient biogeochemical model for estuaries and its application to a funnel-shaped system." Geoscientific Model Development 7, no. 4 (July 4, 2014): 1271–95. http://dx.doi.org/10.5194/gmd-7-1271-2014.

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Abstract. Reactive transport models (RTMs) are powerful tools for disentangling the complex process interplay that drives estuarine biogeochemical dynamics, for assessing the quantitative role of estuaries in global biogeochemical cycles and for predicting their response to anthropogenic disturbances (land-use change, climate change and water management). Nevertheless, the application of RTMs for a regional or global estimation of estuarine biogeochemical transformations and fluxes is generally compromised by their high computational and data demands. Here, we describe C-GEM (Carbon-Generic Es

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Souza, José Francisco Almeida de, José Luiz Lima de Azevedo, Leopoldo Rota de Oliveira, Ivan Dias Soares, and Maurício Magalhães Mata. "INCORPORATION OF NEW TURBULENT CLOSURE SCHEMES IN THE PRINCETON OCEAN MODEL (POM)." Revista Brasileira de Geofísica 31, no. 1 (March 1, 2013): 17. http://dx.doi.org/10.22564/rbgf.v31i1.243.

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One of the most challenging issues in oceanography is the simulation of the mixing processes, which are responsible for diffusion of momentum, heat, salt, sediments etc. In the modeling of flow, the hydrodynamic model simulates the properties of the mean flow while the turbulence model, coupled to the first, is responsible for simulating the mixing processes. In this article it is used the Princeton Ocean Model (POM), which includes the well known turbulent closure model q2 − q2L of Mellor & Yamada (1982), level 2.5. To add flexibility to the modeling, the k − ε and k − ω models, which bel

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De Oliveira, Allan De Oliveira. "CARACTERIZAÇÃO SEDIMENTAR E APLICAÇÃO DO DIAGRAMA DE PEJRUP PARA INTERPRETAÇÃO DA DINÂMICA EM UMA ENSEADA ESTUARINA NA LAGOA DOS PATOS/BRASIL / Sedimentary Characterization and Application of Pejrup Diagram to Interpret the Dinamics in a Small Cove of The Lagoa dos Patos/Brazil." Geographia Meridionalis 1, no. 2 (December 18, 2015): 363. http://dx.doi.org/10.15210/gm.v1i2.6232.

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A partir da análise dos parâmetros estatísticos dos sedimentos de fundo de uma enseada estuarina e da aplicação do diagrama de Pejrup, foi possível caracterizar os processos dinâmicos e sedimentares que ocorrem em uma pequena enseada da Lagoa dos Patos. Os sedimentos que recobrem o fundo da área estudada são formados por areias finas a muito finas, com presença de material lamoso, preferencialmente silte, em direção à região central e margens da enseada. A hidrodinâmica da área é dominada pela circulação estuarina e correntes fluviais, bem como pela ação dos ventos que influenciam estas corren

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Dolby, Greer A., Ryan Hechinger, Ryan A. Ellingson, Lloyd T. Findley, Julio Lorda, and David K. Jacobs. "Sea-level driven glacial-age refugia and post-glacial mixing on subtropical coasts, a palaeohabitat and genetic study." Proceedings of the Royal Society B: Biological Sciences 283, no. 1843 (November 30, 2016): 20161571. http://dx.doi.org/10.1098/rspb.2016.1571.

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Using a novel combination of palaeohabitat modelling and genetic mixture analyses, we identify and assess a sea-level-driven recolonization process following the Last Glacial Maximum (LGM). Our palaeohabitat modelling reveals dramatic changes in estuarine habitat distribution along the coast of California (USA) and Baja California (Mexico). At the LGM (approx. 20 kya), when sea level was approximately 130 m lower, the palaeo-shoreline was too steep for tidal estuarine habitat formation, eliminating this habitat type from regions where it is currently most abundant, and limiting such estuaries

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Leal Filho, Walter, Gustavo J. Nagy, Filipe Martinho, Mustafa Saroar, Mónica Gómez Erache, Ana Lígia Primo, Miguel A. Pardal, and Chunlan Li. "Influences of Climate Change and Variability on Estuarine Ecosystems: An Impact Study in Selected European, South American and Asian Countries." International Journal of Environmental Research and Public Health 19, no. 1 (January 5, 2022): 585. http://dx.doi.org/10.3390/ijerph19010585.

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It is well-known that climate change significantly impacts ecosystems (at the macro-level) and individual species (at the micro-level). Among the former, estuaries are the most vulnerable and affected ecosystems. However, despite the strong relations between climate change and estuaries, there is a gap in the literature regarding international studies across different regions investigating the impacts of climate change and variability on estuaries in different geographical zones. This paper addresses this need and reviews the impacts of climate change, variability and extreme weather on estuar

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Seriani, Robson, Lucas Buruaem Moreira, Denis Moledo de Souza Abessa, Laís D. Abujamara, Natashy S. B. de Carvalho, Luciane Alves Maranho, Aline A. Kirschbaum, and Maria José T. Ranzani-Paiva. "Hematological analysis of Micropogonias Furnieri, Desmarest, 1823, Scianidae, from two estuaries of Baixada Santista, São paulo Brazil." Brazilian Journal of Oceanography 58, spe3 (June 2010): 87–92. http://dx.doi.org/10.1590/s1679-87592010000700011.

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Hematological alterations in fish are considered a useful tool to evaluate pathological processes resulting from the exposure to environmental pollutants. The whitemouth croaker Micropogonias furnieri is a common species in estuarine areas and potentially exposed to many contaminants. In the present study, the hematological characteristics of fish collected at two sites in Baixada Santista (Santos Estuarine System - SES, a polluted site; and the Estuary of Itanhaém River - EIR, unpolluted site) del was analysed. The following blood descriptors were analyzed: number of Erythrocytes (Er), Hemato

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R., Anusiya, and Sukumaran M. "Assessment of Seasonal Variation (2020 to 2021) in Physico-Chemical Parameters of Nandalar Estuary in East Coast of Tamil Nadu, India." International Journal of Zoological Investigations 08, special issue (2022): 254–58. http://dx.doi.org/10.33745/ijzi.2022.v08i0s.030.

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Estuaries are defined as the areas between rivers and the ocean that have unique ecological characteristics, a wealth of flora and fauna, and are essential to both biodiversity and hydrological processes. Aquatic ecosystems depend on their biological traits as well as their physical and chemical qualities. The objective of the current study was to identify seasonal variations in the physico-chemical parameters of Tamil Nadu's Nandalar Estuary. The physico-chemical characteristics of the Nandalar Estuary were recorded which have an impact on the estuarine environment. Future analyses of the eco

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Kleinhans, Maarten G., Lonneke Roelofs, Steven A. H. Weisscher, Ivar R. Lokhorst, and Lisanne Braat. "Estuarine morphodynamics and development modified by floodplain formation." Earth Surface Dynamics 10, no. 2 (April 29, 2022): 367–81. http://dx.doi.org/10.5194/esurf-10-367-2022.

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Abstract. Rivers and estuaries are flanked by floodplains built by mud and vegetation. Floodplains affect channel dynamics and the overall system's pattern through apparent cohesion in the channel banks and through filling of accommodation space and hydraulic resistance. For rivers, effects of mud, vegetation and the combination are thought to stabilise the banks and narrow the channel. However, the thinness of estuarine floodplain, comprised of salt marsh and mudflats, compared to channel depth raises questions about the possible effects of floodplain as constraints on estuary dimensions. To

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Groeneveld, Johan C., Jorge Santos, Fiona MacKay, and Cosmas N. Munga. "A regional assessment of seasonal-to-decadal changes in estuarine socio-ecological systems in the Western Indian Ocean." Western Indian Ocean Journal of Marine Science, no. 1/2021 (December 23, 2021): 131–61. http://dx.doi.org/10.4314/wiojms.si2021.1.9.

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Estuarine socio-ecological systems (SES) in the Western Indian Ocean (WIO) region face mounting pressures from overexploitation, habitat degradation, impacts of climate change and governance inadequacies. A regional assessment of seasonal-to-decadal change in SES of three estuaries (Bons Sinais in Mozambique, Ruvu in Tanzania and Tana in Kenya) was undertaken along 2000 km of tropical coastline (3°-18°S), using a systems-oriented approach and information collected during the Estuarize-WIO project (2016-2019). All three estuaries were open and tidal, but differed along gradients of geomorpholog

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Volta, C., S. Arndt, H. H. G. Savenije, G. G. Laruelle, and P. Regnier. "C-GEM (v 1.0): a new, cost-efficient biogeochemical model for estuaries and its application to a funnel-shaped system." Geoscientific Model Development Discussions 6, no. 4 (November 14, 2013): 5645–709. http://dx.doi.org/10.5194/gmdd-6-5645-2013.

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Abstract. The first part of this paper describes C-GEM (Carbon – Generic Estuary Model), a new, one-dimensional, generic reactive-transport model for the biogeochemical dynamics of carbon and associated bio-elements (N, P, Si) in estuaries. C-GEM is computationally efficient and reduces data-requirements by using an idealized representation of the estuarine geometry to quantitatively predict the dominant features of the estuarine hydrodynamics, salt transport and biogeochemistry. A protocol for the set-up of C-GEM for an estuarine system is also described. The second part of this paper present

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Silva, Janaina Barbosa da, Josiclêda Domiciano Galvíncio, Antonio Carlos De Barros Corrêa, Danielle Gomes da Silva, and Célia Cristina Clemente Machado. "Classificação Geomorfológica dos Estuários do Estado de Pernambuco (Brasil) com Base em Imagens do LANDSAT 5/TM (Geomorphologic Classification of Estuaries of the State of Pernambuco (Brazil) Based on Landsat 5 TM Images)." Revista Brasileira de Geografia Física 4, no. 1 (July 17, 2011): 118. http://dx.doi.org/10.26848/rbgf.v4i1.232689.

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O presente estudo visou classificar os quinze estuários do Estado de Pernambuco, adotando como base as características geomorfológicas. A base de dados utilizada para a classificação foram imagens de satélites do Landsat 5-TM. Foram realizadas análises visuais das imagens de satélite e posteriormente efetuados trabalhos de campo com o intuito de validar as interpretações realizadas. Na zona costeira pernambucana os estuários classificam-se como: Planície Costeira (vale inundado), Formado por Barras e por Outros Processos. As interações espaço-temporal dos processos ambientais durante o Quatern

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Burchard, Hans. "A Universal Law of Estuarine Mixing." Journal of Physical Oceanography 50, no. 1 (January 2020): 81–93. http://dx.doi.org/10.1175/jpo-d-19-0014.1.

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AbstractA universal law of estuarine mixing is derived here, combining the approaches of salinity coordinates, Knudsen relations, total exchange flow, mixing definition as salinity variance loss, and the mixing–exchange flow relation. As a result, the long-term average mixing within an estuarine volume bounded by the isohaline of salinity S amounts to M(S) = S2Qr, where Qr is the average river runoff into the estuary. Consequently, the mixing per salinity class is m(S) = ∂SM(S) = 2SQr, which can also be expressed as the product of the isohaline volume and the mixing averaged over the isohaline

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Lonthair, Joshua, Rasmus Ern, and Andrew J. Esbaugh. "The early life stages of an estuarine fish, the red drum (Sciaenops ocellatus), are tolerant to high pCO2." ICES Journal of Marine Science 74, no. 4 (January 8, 2017): 1042–50. http://dx.doi.org/10.1093/icesjms/fsw225.

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Ocean acidification (OA) and other climate change induced environmental alterations are resulting in unprecedented rates of environmental deterioration. This environmental change is generally thought to be too fast for adaptation using typical evolutionary processes, and thus sensitivity may be dependent on the presence of existing tolerant genotypes and species. Estuaries undergo natural pCO2 fluctuations over a variety of time scales, and levels regularly exceed the predicted end of the century values. Interestingly, estuarine fish species have been overlooked in reference to the impacts of

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Hughes, Brent B., Kerstin Wasson, M. Tim Tinker, Susan L. Williams, Lilian P. Carswell, Katharyn E. Boyer, Michael W. Beck, et al. "Species recovery and recolonization of past habitats: lessons for science and conservation from sea otters in estuaries." PeerJ 7 (December 10, 2019): e8100. http://dx.doi.org/10.7717/peerj.8100.

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Recovering species are often limited to much smaller areas than they historically occupied. Conservation planning for the recovering species is often based on this limited range, which may simply be an artifact of where the surviving population persisted. Southern sea otters (Enhydra lutris nereis) were hunted nearly to extinction but recovered from a small remnant population on a remote stretch of the California outer coast, where most of their recovery has occurred. However, studies of recently-recolonized estuaries have revealed that estuaries can provide southern sea otters with high quali

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Bange, Hermann W., Chun Hock Sim, Daniel Bastian, Jennifer Kallert, Annette Kock, Aazani Mujahid, and Moritz Müller. "Nitrous oxide (N<sub>2</sub>O) and methane (CH<sub>4</sub>) in rivers and estuaries of northwestern Borneo." Biogeosciences 16, no. 22 (November 15, 2019): 4321–35. http://dx.doi.org/10.5194/bg-16-4321-2019.

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Abstract. Nitrous oxide (N2O) and methane (CH4) are atmospheric trace gases which play important roles in the climate and atmospheric chemistry of the Earth. However, little is known about their emissions from rivers and estuaries, which seem to contribute significantly to the atmospheric budget of both gases. To this end concentrations of N2O and CH4 were measured in the Rajang, Maludam, Sebuyau and Simunjan rivers draining peatland in northwestern (NW) Borneo during two campaigns in March and September 2017. The Rajang River was additionally sampled in August 2016 and the Samunsam and Semata

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Hodgkin, Ernest P., and Patrick Hesp. "Estuaries to salt lakes: Holocene transformation of the estuarine ecosystems of south-western Australia." Marine and Freshwater Research 49, no. 3 (1998): 183. http://dx.doi.org/10.1071/mf96109.

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When the estuaries of south-western Australia were first flooded by the Holocene marine transgression about 7000 years before present (BP), most were enclosed by limestone barrier dunes. Coastal sand drift built bars and flood-tide deltas in the narrow entrances, but until about 3500 years BP the estuaries remained tidal-dominated systems with a diverse marine–estuarine fauna. Now the bars/deltas so obstruct the small tides that estuary water is fresh in winter and marine to hypersaline in summer; the estuaries are river-flow-dominated systems and the ecosystems are characterised by a restrict

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Windom, Herbert L., and Thomas M. Church. "Second international symposium on the biogeochemistry of model estuaries: Estuarine processes in global change." Marine Chemistry 43, no. 1-4 (July 1993): 1–2. http://dx.doi.org/10.1016/0304-4203(93)90211-6.

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Conroy, Ted, David A. Sutherland, and David K. Ralston. "Estuarine Exchange Flow Variability in a Seasonal, Segmented Estuary." Journal of Physical Oceanography 50, no. 3 (March 2020): 595–613. http://dx.doi.org/10.1175/jpo-d-19-0108.1.

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AbstractSmall estuaries in Mediterranean climates display pronounced salinity variability at seasonal and event time scales. Here, we use a hydrodynamic model of the Coos Estuary, Oregon, to examine the seasonal variability of the salinity dynamics and estuarine exchange flow. The exchange flow is primarily driven by tidal processes, varying with the spring–neap cycle rather than discharge or the salinity gradient. The salinity distribution is rarely in equilibrium with discharge conditions because during the wet season the response time scale is longer than discharge events, while during low

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Wei, Xiaoyan, Henk M. Schuttelaars, Megan E. Williams, Jennifer M. Brown, Peter D. Thorne, and Laurent O. Amoudry. "Unraveling Interactions between Asymmetric Tidal Turbulence, Residual Circulation, and Salinity Dynamics in Short, Periodically Weakly Stratified Estuaries." Journal of Physical Oceanography 51, no. 5 (May 2021): 1395–416. http://dx.doi.org/10.1175/jpo-d-20-0146.1.

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AbstractAsymmetric tidal turbulence (ATT) strongly influences estuarine health and functioning. However, its impact on the three-dimensional estuarine dynamics and the feedback of water motion and salinity distribution on ATT remain poorly understood, especially for short estuaries (estuarine length ≪ tidal wavelength). This study systematically investigates the abovementioned interactions in a short estuary for the first time, considering periodically weakly stratified conditions. This is done by developing a three-dimensional semi-analytical model (combining perturbation method with finite e

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Prandle, David, Andrew Lane, and Andrew J. Manning. "New typologies for estuarine morphology." Geomorphology 81, no. 3-4 (November 2006): 309–15. http://dx.doi.org/10.1016/j.geomorph.2006.04.017.

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Smith, Jansen A., Daniel A. Auerbach, Karl W. Flessa, Alexander S. Flecker, and Gregory P. Dietl. "Fossil clam shells reveal unintended carbon cycling consequences of Colorado River management." Royal Society Open Science 3, no. 9 (September 2016): 160170. http://dx.doi.org/10.1098/rsos.160170.

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Water management that alters riverine ecosystem processes has strongly influenced deltas and the people who depend on them, but a full accounting of the trade-offs is still emerging. Using palaeoecological data, we document a surprising biogeochemical consequence of water management in the Colorado River basin. Complete allocation and consumptive use of the river's flow has altered the downstream estuarine ecosystem, including the abundance and composition of the mollusc community, an important component in estuarine carbon cycling. In particular, population declines in the endemic Colorado de

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Dinauer, Ashley, and Alfonso Mucci. "Spatial variability in surface-water <i>p</i>CO<sub>2</sub> and gas exchange in the world's largest semi-enclosed estuarine system: St. Lawrence Estuary (Canada)." Biogeosciences 14, no. 13 (July 6, 2017): 3221–37. http://dx.doi.org/10.5194/bg-14-3221-2017.

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Abstract. The incomplete spatial coverage of CO2 partial pressure (pCO2) measurements across estuary types represents a significant knowledge gap in current regional- and global-scale estimates of estuarine CO2 emissions. Given the limited research on CO2 dynamics in large estuaries and bay systems, as well as the sources of error in the calculation of pCO2 (carbonic acid dissociation constants, organic alkalinity), estimates of air–sea CO2 fluxes in estuaries are subject to large uncertainties. The Estuary and Gulf of St. Lawrence (EGSL) at the lower limit of the subarctic region in eastern C

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BRÜCKNER, MURIEL Z. M., WILLIAM J. MCMAHON, and MAARTEN G. KLEINHANS. "MUDDYING THE WATERS: MODELING THE EFFECTS OF EARLY LAND PLANTS IN PALEOZOIC ESTUARIES." PALAIOS 36, no. 5 (May 31, 2021): 173–81. http://dx.doi.org/10.2110/palo.2020.073.

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ABSTRACT The Paleozoic evolution of vegetation transformed terrestrial landscapes, facilitating novel sedimentary processes and creating new habitats. This transformation left a permanent mark on the sedimentary record, perhaps most strikingly via an upsurge in preserved terrestrial mudrock. Whereas feedbacks between evolving vegetation and river structure have been widely studied, Paleozoic estuaries have so far received scant attention. Located at the interface between the land and sea, the co-adjustment of estuarine morphology and plant traits are fundamentally tied to a varied range of geo

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Zhang, Bing, Jing Lv, Peng Huo, and Shao Xiong Zhang. "Application of EFDC to Density Stratified Flow." Applied Mechanics and Materials 256-259 (December 2012): 2486–89. http://dx.doi.org/10.4028/www.scientific.net/amm.256-259.2486.

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Environmental Fluid Dynamics Code (EFDC) was developed by Hamrick at Virginia Institute of Marine Science for estuarine and coastal applications. EFDC is a general-purpose modeling package for simulating three-dimensional flow, transport, and biogeochemical processes in surface water systems such as rivers, lakes, reservoirs, estuaries, wetlands and coastal regions. Use the 3-D numerical model EFDC simulated the density stratified flow in a slut. Compared the simulation and experimental data, the results showed that EFDC could accurately simulated the density stratified flow.

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Nidzieko, Nicholas J. "Allometric scaling of estuarine ecosystem metabolism." Proceedings of the National Academy of Sciences 115, no. 26 (June 11, 2018): 6733–38. http://dx.doi.org/10.1073/pnas.1719963115.

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There are still significant uncertainties in the magnitude and direction of carbon fluxes through coastal ecosystems. An important component of these biogeochemical budgets is ecosystem metabolism, the net result of organismal metabolic processes within an ecosystem. In this paper, I present a synthesis of published ecosystem metabolism studies from coastal ecosystems and describe an empirical observation that size-dependent patterns in aquatic gross primary production and community respiration exist across a wide range of coastal geomorphologies. Ecosystem metabolism scales to the 3/4 power w

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Ricci, SW, DB Eggleston, DR Bohnenstiehl, and A. Lillis. "Temporal soundscape patterns and processes in an estuarine reserve." Marine Ecology Progress Series 550 (May 25, 2016): 25–38. http://dx.doi.org/10.3354/meps11724.

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Thrush, Simon F., Judi E. Hewitt, Alf Norkko, Vonda J. Cummings, and Greig A. Funnell. "MACROBENTHIC RECOVERY PROCESSES FOLLOWING CATASTROPHIC SEDIMENTATION ON ESTUARINE SANDFLATS." Ecological Applications 13, no. 5 (October 2003): 1433–55. http://dx.doi.org/10.1890/02-5198.

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Telesh, Irena V., and Vladislav V. Khlebovich. "Principal processes within the estuarine salinity gradient: A review." Marine Pollution Bulletin 61, no. 4-6 (2010): 149–55. http://dx.doi.org/10.1016/j.marpolbul.2010.02.008.

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Chant, Robert J., Wayne R. Geyer, Robert Houghton, Elias Hunter, and James Lerczak. "Estuarine Boundary Layer Mixing Processes: Insights from Dye Experiments*." Journal of Physical Oceanography 37, no. 7 (July 1, 2007): 1859–77. http://dx.doi.org/10.1175/jpo3088.1.

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Abstract A series of dye releases in the Hudson River estuary elucidated diapycnal mixing rates and temporal variability over tidal and fortnightly time scales. Dye was injected in the bottom boundary layer for each of four releases during different phases of the tide and of the spring–neap cycle. Diapycnal mixing occurs primarily through entrainment that is driven by shear production in the bottom boundary layer. On flood the dye extended vertically through the bottom mixed layer, and its concentration decreased abruptly near the base of the pycnocline, usually at a height corresponding to a

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