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Artículos de revistas sobre el tema "Oceanic carbonate system"

Autor: Grafiati

Publicado: 25 de mayo de 2024

Última modificación: 31 de julio de 2025

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1

Li, Futian, Yaping Wu, David A. Hutchins, Feixue Fu, and Kunshan Gao. "Physiological responses of coastal and oceanic diatoms to diurnal fluctuations in seawater carbonate chemistry under two CO<sub>2</sub> concentrations." Biogeosciences 13, no. 22 (2016): 6247–59. http://dx.doi.org/10.5194/bg-13-6247-2016.

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Abstract. Diel and seasonal fluctuations in seawater carbonate chemistry are common in coastal waters, while in the open-ocean carbonate chemistry is much less variable. In both of these environments, ongoing ocean acidification is being superimposed on the natural dynamics of the carbonate buffer system to influence the physiology of phytoplankton. Here, we show that a coastal Thalassiosira weissflogii isolate and an oceanic diatom, Thalassiosira oceanica, respond differentially to diurnal fluctuating carbonate chemistry in current and ocean acidification (OA) scenarios. A fluctuating carbona

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2

Humphreys, Matthew P., Ernie R. Lewis, Jonathan D. Sharp, and Denis Pierrot. "PyCO2SYS v1.8: marine carbonate system calculations in Python." Geoscientific Model Development 15, no. 1 (2022): 15–43. http://dx.doi.org/10.5194/gmd-15-15-2022.

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Abstract. Oceanic dissolved inorganic carbon (TC) is the largest pool of carbon that substantially interacts with the atmosphere on human timescales. Oceanic TC is increasing through uptake of anthropogenic carbon dioxide (CO2), and seawater pH is decreasing as a consequence. Both the exchange of CO2 between the ocean and atmosphere and the pH response are governed by a set of parameters that interact through chemical equilibria, collectively known as the marine carbonate system. To investigate these processes, at least two of the marine carbonate system's parameters are typically measured – m

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3

Calvès, Gérôme, Alan Mix, Liviu Giosan, et al. "The Nazca Drift System – palaeoceanographic significance of a giant sleeping on the SE Pacific Ocean floor." Geological Magazine 159, no. 3 (2021): 322–36. http://dx.doi.org/10.1017/s0016756821000960.

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AbstractThe evolution and resulting morphology of a contourite drift system in the SE Pacific oceanic basin is investigated in detail using seismic imaging and an age-calibrated borehole section. The Nazca Drift System covers an area of 204 500 km2 and stands above the abyssal basins of Peru and Chile. The drift is spread along the Nazca Ridge in water depths between 2090 and 5330 m. The Nazca Drift System was drilled at Ocean Drilling Program Site 1237. This deep-water drift overlies faulted oceanic crust and onlaps associated volcanic highs. Its thickness ranges from 104 to 375 m. The seismi

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4

Hart, Malcolm B., Wendy Hudson, Christopher W. Smart, and Jarosław Tyszka. "A reassessment of ‘<i>Globigerina bathoniana</i>’ Pazdrowa, 1969 and the palaeoceanographic significance of Jurassic planktic foraminifera from southern Poland." Journal of Micropalaeontology 31, no. 2 (2012): 97–109. http://dx.doi.org/10.1144/0262-821x11-015.

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Abstract. ‘Globigerina Ooze’, Foraminiferal Ooze or Carbonate Ooze as it is now known, is a widespread and highly characteristic sediment of the modern ocean system. Comparable sediments are much less common in the geological record although, as we describe here, a number of Middle Jurassic carbonate sediments with distinctive assemblages from Central Europe fulfil many of the criteria. One important component of these assemblages in the Middle Jurassic is ‘Globigerina bathoniana’ Pazdrowa, 1969, first described from the Bathonian sediments near Ogrodzieniec (Poland). The generic assignment of

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5

Nisumaa, A. M., S. Pesant, R. G. J. Bellerby, et al. "EPOCA/EUR-OCEANS data-mining compilation on the impacts of ocean acidification." Earth System Science Data Discussions 3, no. 1 (2010): 109–30. http://dx.doi.org/10.5194/essdd-3-109-2010.

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Abstract. The uptake of anthropogenic CO2 by the oceans has led to a rise in the oceanic partial pressure of CO2, and to a decrease in pH and carbonate ion concentration. This modification of the marine carbonate system is referred to as ocean acidification. Numerous papers report the effects of ocean acidification on marine organisms and communities but few have provided details concerning full carbonate chemistry and complementary observations. Additionally, carbonate system variables are often reported in different units, calculated using different sets of dissociation constants and on diff

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6

Nisumaa, A. M., S. Pesant, R. G. J. Bellerby, et al. "EPOCA/EUR-OCEANS data compilation on the biological and biogeochemical responses to ocean acidification." Earth System Science Data 2, no. 2 (2010): 167–75. http://dx.doi.org/10.5194/essd-2-167-2010.

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Abstract. The uptake of anthropogenic CO2 by the oceans has led to a rise in the oceanic partial pressure of CO2, and to a decrease in pH and carbonate ion concentration. This modification of the marine carbonate system is referred to as ocean acidification. Numerous papers report the effects of ocean acidification on marine organisms and communities but few have provided details concerning full carbonate chemistry and complementary observations. Additionally, carbonate system variables are often reported in different units, calculated using different sets of dissociation constants and on diff

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7

George, Bivin G., Jyotiranjan S. Ray, and Sanjeev Kumar. "Geochemistry of carbonate formations of the Chhattisgarh Supergroup, central India: implications for Mesoproterozoic global events." Canadian Journal of Earth Sciences 56, no. 3 (2019): 335–46. http://dx.doi.org/10.1139/cjes-2018-0144.

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The Chhattisgarh Supergroup is one of the major Proterozoic marine sedimentary sequences of India. It consists of largely undeformed and unmetamorphosed siliciclastic, volcaniclastic, and carbonate formations deposited in two sub-basins, Hirri and Bharadwar, separated by an Archean greenstone belt. In spite of its apparent importance for Mesoproterozoic oceanic records, very few geochemical studies have been carried in the basin. Here, we present results of our high resolution geochemical and C–O–Sr isotopic studies in two carbonate formations of the supergroup: the Charmuria and the Chandi. W

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8

Zahn, Rainer, Ahmed Rushdi, Nicklas G. Pisias, Brian D. Bornhold, Bertrand Blaise та Robert Karlin. "Carbonate deposition and benthicδ13C in the subarctic Pacific: implications for changes of the oceanic carbonate system during the past 750,000 years". Earth and Planetary Science Letters 103, № 1-4 (1991): 116–32. http://dx.doi.org/10.1016/0012-821x(91)90154-a.

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9

Wagener, Thibaut, Nicolas Metzl, Mathieu Caffin, et al. "Carbonate system distribution, anthropogenic carbon and acidification in the western tropical South Pacific (OUTPACE 2015 transect)." Biogeosciences 15, no. 16 (2018): 5221–36. http://dx.doi.org/10.5194/bg-15-5221-2018.

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Abstract. The western tropical South Pacific was sampled along a longitudinal 4000 km transect (OUTPACE cruise, 18 February, 3 April 2015) for the measurement of carbonate parameters (total alkalinity and total inorganic carbon) between the Melanesian Archipelago (MA) and the western part of the South Pacific gyre (WGY). This paper reports this new dataset and derived properties: pH on the total scale (pHT) and the CaCO3 saturation state with respect to aragonite (Ωara). We also estimate anthropogenic carbon (CANT) distribution in the water column using the TrOCA method (Tracer combining Oxyge

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10

Loretz, Jeremy. "(Invited) Electrochemical Marine Carbon Dioxide Removal (mCDR)." ECS Meeting Abstracts MA2024-01, no. 28 (2024): 1493. http://dx.doi.org/10.1149/ma2024-01281493mtgabs.

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Ebb Carbon is developing an electrochemical system to safely remove carbon dioxide from the atmosphere and store it in the ocean as dissolved inorganic carbon. The core process uses bipolar electrodialysis (BPED) to process incoming seawater into aqueous acid and alkaline seawater. The acid is kept on land and used for beneficial purposes that result in its neutralization. The alkaline seawater is returned to the ocean, shifting the carbonate buffer system toward carbonate, resulting in the removal of CO2 from the air into oceanic bicarbonate as air-sea equilibration is restored. For the mCDR

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11

Dumousseaud, C., E. P. Achterberg, T. Tyrrell, et al. "Contrasting effects of temperature and winter mixing on the seasonal and inter-annual variability of the carbonate system in the Northeast Atlantic Ocean." Biogeosciences Discussions 6, no. 5 (2009): 9701–35. http://dx.doi.org/10.5194/bgd-6-9701-2009.

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Abstract. Future climate change due to the increase in atmospheric CO2 concentrations is expected to strongly affect the oceans, with shallower winter mixing and consequent reduction in primary productivity and oceanic carbon drawdown in low and mid-latitudinal oceanic regions. Here we test this hypothesis by examining the effects of cold and warm winters on the carbonate system in the surface waters of the Northeast Atlantic Ocean for the period between 2005 and 2007. Monthly observations were made between the English Channel and the Bay of Biscay using a ship of opportunity program. During t

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12

Dumousseaud, C., E. P. Achterberg, T. Tyrrell, et al. "Contrasting effects of temperature and winter mixing on the seasonal and inter-annual variability of the carbonate system in the Northeast Atlantic Ocean." Biogeosciences 7, no. 5 (2010): 1481–92. http://dx.doi.org/10.5194/bg-7-1481-2010.

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Abstract. Future climate change as a result of increasing atmospheric CO2 concentrations is expected to strongly affect the oceans, with shallower winter mixing and consequent reduction in primary production and oceanic carbon drawdown in low and mid-latitudinal oceanic regions. Here we test this hypothesis by examining the effects of cold and warm winters on the carbonate system in the surface waters of the Northeast Atlantic Ocean for the period between 2005 and 2007. Monthly observations were made between the English Channel and the Bay of Biscay using a ship of opportunity program. During

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13

Pimentel, Márcio M., and Maria da Glória Silva. "Sm-Nd age of the fazenda brasileiro gabbro, Bahia, Brazil: example of robust behavior of the Sm-Nd isotopic system under extreme hydrothermal alteration." Anais da Academia Brasileira de Ciências 75, no. 3 (2003): 383–92. http://dx.doi.org/10.1590/s0001-37652003000300009.

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The Fazenda Brasileiro gold mineralization is hosted by a gabbroic sill, intrusive into metavolcanicmetasedimentary rocks of the Rio Itapicuru Greenstone Belt, São Francisco Craton. The 2.05 Ga old mineralization is associated with intense shearing and hydrothermal alteration, and the host gabbro is altered to a series of rocks rich in sericite, chlorite, actinolite, carbonate and quartz. Twelve whole-rock samples of the gold mineralization, representing varied degrees of alteration, from rocks with preserved igneous textures to the ore (quartz-carbonate-sulfide-chlorite), were studied by the

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14

Gorbachev, N. S., A. V. Kostyuk, A. N. Nekrasov, P. N. Gorbachev, and D. M. Soultanov. "Experimental study of the system peridotite–basalt–fluid: phase relations at supra- and sepercritical P-T parameters." Петрология 27, no. 6 (2019): 606–16. http://dx.doi.org/10.31857/s0869-5903276606-616.

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To obtain new data on the phase relationships in the fluid-containing upper mantle at P up to 4 GPa, T up to 1400C, partial melting of H2O-containing peridotite, basalt, as well as peridotite-basalt association with an alkaline-carbonate fluid was experimentally studied as a model of the mantle reservoir with protoliths of the subdued oceanic crust. At partial melting of H2O-containing peridotite at P = 3.73.9 GPa, T = 10001300C, critical ratios were observed in the whole studied interval P and T. At partial melting of H2O-containing basalt critical relationships between the silicate melt and

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15

Pinsonneault, A. J., H. D. Matthews, E. D. Galbraith, and A. Schmittner. "Calcium carbonate production response to future ocean warming and acidification." Biogeosciences Discussions 8, no. 6 (2011): 11863–97. http://dx.doi.org/10.5194/bgd-8-11863-2011.

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Abstract. Anthropogenic carbon dioxide (CO2) emissions are acidifying the ocean, affecting calcification rates in pelagic organisms and thereby modifying the oceanic alkalinity cycle. However, the responses of pelagic calcifying organisms to acidification vary widely between species, contributing uncertainty to predictions of atmospheric CO2 and the resulting climate change. Meanwhile, ocean warming caused by rising CO2 is expected to drive increased growth rates of all pelagic organisms, including calcifiers. It thus remains unclear whether anthropogenic CO2 will ultimately increase or decrea

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16

Hofmann, A. F., E. T. Peltzer, and P. G. Brewer. "Kinetic bottlenecks to chemical exchange rates for deep-sea animals – Part 2: Carbon Dioxide." Biogeosciences 10, no. 4 (2013): 2409–25. http://dx.doi.org/10.5194/bg-10-2409-2013.

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Abstract. Increased ocean acidification from fossil fuel CO2 invasion, from temperature-driven changes in respiration, and from possible leakage from sub-seabed geologic CO2 disposal has aroused concern over the impacts of elevated CO2 concentrations on marine life. Discussion of these impacts has so far focused only on changes in the oceanic bulk fluid properties (ΔpH, Δ[∑ CO2], etc.) as the critical variable and with a major focus on carbonate shell formation. Here we describe the rate problem for animals that must export CO2 at about the same rate at which O2 is consumed. We analyse the bas

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17

Sulpis, Olivier, Siv K. Lauvset, and Mathilde Hagens. "Current estimates of K<sub>1</sub>* and K<sub>2</sub>* appear inconsistent with measured CO<sub>2</sub> system parameters in cold oceanic regions." Ocean Science 16, no. 4 (2020): 847–62. http://dx.doi.org/10.5194/os-16-847-2020.

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Abstract. Seawater absorption of anthropogenic atmospheric carbon dioxide (CO2) has led to a range of changes in carbonate chemistry, collectively referred to as ocean acidification. Stoichiometric dissociation constants used to convert measured carbonate system variables (pH, pCO2, dissolved inorganic carbon, total alkalinity) into globally comparable parameters are crucial for accurately quantifying these changes. The temperature and salinity coefficients of these constants have generally been experimentally derived under controlled laboratory conditions. Here, we use field measurements of c

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18

Humphreys, Matthew P. "Climate sensitivity and the rate of ocean acidification: future impacts, and implications for experimental design." ICES Journal of Marine Science 74, no. 4 (2016): 934–40. http://dx.doi.org/10.1093/icesjms/fsw189.

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The global mean surface temperature and partial pressure of carbon dioxide (CO2) are increasing both in the atmosphere and ocean. Oceanic CO2 uptake causes a decline in pH called ocean acidification (OA), which also alters other biologically important carbonate system variables such as carbonate mineral saturation states. Here, we discuss how a “temperature buffering” effect chemically links the rates of warming and OA at a more fundamental level than is often appreciated, meaning that seawater warming could mitigate some of the adverse biological impacts of OA. In a global mean sense, the rat

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19

Galdies, Charles, and Roberta Guerra. "High Resolution Estimation of Ocean Dissolved Inorganic Carbon, Total Alkalinity and pH Based on Deep Learning." Water 15, no. 8 (2023): 1454. http://dx.doi.org/10.3390/w15081454.

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This study combines measurements of dissolved inorganic carbon (DIC), total alkalinity (TA), pH, earth observation (EO), and ocean model products with deep learning to provide a good step forward in detecting changes in the ocean carbonate system parameters at a high spatial and temporal resolution in the North Atlantic region (Long. −61.00° to −50.04° W; Lat. 24.99° to 34.96° N). The in situ reference dataset that was used for this study provided discrete underway measurements of DIC, TA, and pH collected by M/V Equinox in the North Atlantic Ocean. A unique list of co-temporal and co-located

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20

Mattsdotter Björk, M., A. Fransson, and M. Chierici. "Ocean acidification state in western Antarctic surface waters: drivers and interannual variability." Biogeosciences Discussions 10, no. 5 (2013): 7879–916. http://dx.doi.org/10.5194/bgd-10-7879-2013.

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Abstract. Each December during four years from 2006 to 2010, the surface water carbonate system was measured and investigated in the Amundsen Sea and Ross Sea, western Antarctica as part of the Oden Southern Ocean expeditions (OSO). The I/B Oden started in Punta Arenas in Chile and sailed southwest, passing through different regimes such as, the marginal/seasonal ice zone, fronts, coastal shelves, and polynyas. Discrete surface water was sampled underway for analysis of total alkalinity (AT), total dissolved inorganic carbon (CT) and pH. Two of these parameters were used together with sea-surf

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21

Rixen, T., C. Goyet, and V. Ittekkot. "Diatoms and their influence on the biologically mediated uptake of atmospheric CO<sub>2</sub> in the Arabian Sea upwelling system." Biogeosciences Discussions 2, no. 1 (2005): 103–36. http://dx.doi.org/10.5194/bgd-2-103-2005.

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Abstract. Model experiments have shown that diatoms can lower the atmospheric CO2-concentration when they grow at the expense of coccolithophorids, since this reduces the precipitation of calcium carbonate, which acts as an oceanic CO2 source. In the Arabian Sea we conducted long-term sediment trap experiments (water depth >1000 m) in order to study processes controlling shifts from diatom to non-diatom dominated systems. One of our major problems was to link sediment trap records to surface ocean processes. Satellite-derived observations on upper ocean parameters were helpful to reduce thi

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22

Kepezhinskas, P. K., A. I. Khanchuk, N. V. Berdnikov, and V. O. Krutikova. "RARE-EARTH MINERALS IN ULTRABASITES OF THE ILDEUS MASSIF (STANOVOY CRATONIC SUPERTERRANE): INFLUENCE OF POST-COLLISION PROCESSES ON DEEP ORE-MAGMATIC SYSTEMS OF CONVERGENT PLATE BOUNDARIES." Tikhookeanskaya Geologiya 43, no. 6 (2024): 3–23. http://dx.doi.org/10.30911/0207-4028-2024-43-6-3-23.

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The Ildeus ore-magmatic basite-ultrabasite system in the central part of the Stanovoy superterrane formed in the Triassic as a result of subduction of the Mongol-Okhotsk basin oceanic lithosphere. In the Jurassic and Early Cretaceous, it underwent hydrothermal-metasomatic alterations during collision and post-collision processes within the southern margin of the Siberian continent. Hydrothermally altered ultrabasites and acid-alkaline albite-quartz-biotite-K-feldspar-apatite (with calcite and barite) metasomatites of Ildeus contain rare earth element (REE) minerals, represented by monazite in

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23

Roberts, Christopher D., and Aradhna K. Tripati. "Modeled reconstructions of the oceanic carbonate system for different histories of atmospheric carbon dioxide during the last 20 Ma." Global Biogeochemical Cycles 23, no. 1 (2009): n/a. http://dx.doi.org/10.1029/2008gb003310.

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24

Long, Matthew C., Keith Lindsay, Synte Peacock, J. Keith Moore, and Scott C. Doney. "Twentieth-Century Oceanic Carbon Uptake and Storage in CESM1(BGC)*." Journal of Climate 26, no. 18 (2013): 6775–800. http://dx.doi.org/10.1175/jcli-d-12-00184.1.

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Abstract Ocean carbon uptake and storage simulated by the Community Earth System Model, version 1–Biogeochemistry [CESM1(BGC)], is described and compared to observations. Fully coupled and ocean-ice configurations are examined; both capture many aspects of the spatial structure and seasonality of surface carbon fields. Nearly ubiquitous negative biases in surface alkalinity result from the prescribed carbonate dissolution profile. The modeled sea–air CO2 fluxes match observationally based estimates over much of the ocean; significant deviations appear in the Southern Ocean. Surface ocean pCO2

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25

Petton, Sébastien, Fabrice Pernet, Valérian Le Roy, et al. "French coastal network for carbonate system monitoring: the CocoriCO₂ dataset." Earth System Science Data 16, no. 4 (2024): 1667–88. http://dx.doi.org/10.5194/essd-16-1667-2024.

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Abstract. Since the beginning of the industrial revolution, atmospheric carbon dioxide (CO2) concentrations have risen steadily and have induced a decrease of the averaged surface ocean pH by 0.1 units, corresponding to an increase in ocean acidity of about 30 %. In addition to ocean warming, ocean acidification poses a tremendous challenge to some marine organisms, especially calcifiers. The need for long-term oceanic observations of pH and temperature is a key element to assess the vulnerability of marine communities and ecosystems to these pressures. Nearshore productive environments, where

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26

Sun, Yuan, Feifei Liu, Jia Liu, et al. "Microbial Community Response to Photoelectrons and Regulation on Dolomite Precipitation in Marine Sediments of Yellow Sea." Minerals 13, no. 6 (2023): 753. http://dx.doi.org/10.3390/min13060753.

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Dolomite exhibits a wide distribution in geological strata. The metabolic activities of microorganisms in marine sediments play a crucial role in the formation of dolomite. Semiconducting minerals, such as hematite, goethite, and rutile, generate photoelectrons when exposed to sunlight, which can impact the community structure and metabolic activities of microorganisms. In this study, a simulated photoelectron system was conducted to investigate the response of the microbial community, as well as the regulation of sulfate reduction, to photoelectrons using high-throughput sequencing of the 16S

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27

Klein, Frieder, Susan E. Humphris, Weifu Guo, Florence Schubotz, Esther M. Schwarzenbach, and William D. Orsi. "Fluid mixing and the deep biosphere of a fossil Lost City-type hydrothermal system at the Iberia Margin." Proceedings of the National Academy of Sciences 112, no. 39 (2015): 12036–41. http://dx.doi.org/10.1073/pnas.1504674112.

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Subseafloor mixing of reduced hydrothermal fluids with seawater is believed to provide the energy and substrates needed to support deep chemolithoautotrophic life in the hydrated oceanic mantle (i.e., serpentinite). However, geosphere-biosphere interactions in serpentinite-hosted subseafloor mixing zones remain poorly constrained. Here we examine fossil microbial communities and fluid mixing processes in the subseafloor of a Cretaceous Lost City-type hydrothermal system at the magma-poor passive Iberia Margin (Ocean Drilling Program Leg 149, Hole 897D). Brucite−calcite mineral assemblages prec

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28

Goričan, Špela, Josip Halamić, Tonći Grgasović, and Tea Kolar-Jurkovšek. "Stratigraphic evolution of Triassic arc-backarc system in northwestern Croatia." Bulletin de la Société Géologique de France 176, no. 1 (2005): 3–22. http://dx.doi.org/10.2113/176.1.3.

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Abstract Middle Triassic arc-related extensional tectonics in the western Tethys generated a complex pattern of intra-and backarc basins. We studied volcano-sedimentary successions of subsided continental-margin blocks (Mts. Žumberak and Ivanščica) and of dismembered incomplete ophiolite sequences interpreted as remnants of a backarc basin (Mts. Medvednica and Kalnik) in northwestern Croatia. We dated the successions with radiolarians, conodonts, foraminifers, algae, and sponges. The continental margin experienced a phase of accelerated subsidence in the late Anisian that was approximately

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Guo, Zhengfu, and Marjorie Wilson. "Late Oligocene–early Miocene transformation of postcollisional magmatism in Tibet." Geology 47, no. 8 (2019): 776–80. http://dx.doi.org/10.1130/g46147.1.

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Abstract Uplift of the Tibetan Plateau is thought to be one of the most important orogenic and climate forcing events of the Cenozoic Era, associated with geodynamic changes related to India-Asia collision and subsequent continental lithosphere subduction. However, the fate and scale of the subducted continental lithosphere segments remain highly controversial. Using a comprehensive compilation of the spatiotemporal distribution of postcollisional magmatic rocks across Tibet, together with new geochemical and Sr-Nd-Pb isotopic data and modeling simulations, we propose a holistic, two-stage evo

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30

Ridgwell, A., I. Zondervan, J. C. Hargreaves, J. Bijma, and T. M. Lenton. "Assessing the potential long-term increase of oceanic fossil fuel CO<sub>2</sub> uptake due to CO<sub>2</sub>-calcification feedback." Biogeosciences 4, no. 4 (2007): 481–92. http://dx.doi.org/10.5194/bg-4-481-2007.

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Abstract. Plankton manipulation experiments exhibit a wide range of sensitivities of biogenic calcification to simulated anthropogenic acidification of the ocean, with the "lab rat" of planktic calcifiers, Emiliania huxleyi apparently not representative of calcification generally. We assess the implications of this observational uncertainty by creating an ensemble of realizations of an Earth system model that encapsulates a comparable range of uncertainty in calcification response to ocean acidification. We predict that a substantial reduction in marine carbonate production is possible in the

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CALNER, MIKAEL, and LENNART JEPPSSON. "Carbonate platform evolution and conodont stratigraphy during the middle Silurian Mulde Event, Gotland, Sweden." Geological Magazine 140, no. 2 (2003): 173–203. http://dx.doi.org/10.1017/s0016756802007070.

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Evidence from sedimentology and conodont biostratigraphy is used to reinterpret the mid-Homerian (Late Wenlock) succession on Gotland, Sweden. A new conodont zonation includes from below: the Ozarkodina bohemica longa Zone (including five subzones), the Kockelella ortus absidata Zone and the Ctenognathodus murchisoni Zone (two taxa are named, Ozarkodina bohemica longa and Pseudooneotodus linguicornis). These new zones are integrated with facies in order to correlate strata and infer the major depositional environments and the controls on deposition during the mid-Homerian Mulde Event. Reef-ass

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32

Hartin, C. A., B. Bond-Lamberty, P. Patel, and A. Mundra. "Projections of ocean acidification over the next three centuries using a simple global climate carbon-cycle model." Biogeosciences Discussions 12, no. 23 (2015): 19269–305. http://dx.doi.org/10.5194/bgd-12-19269-2015.

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Abstract. Continued oceanic uptake of anthropogenic CO2 is projected to significantly alter the chemistry of the upper oceans, potentially having serious consequences for the marine ecosystems. Projections of ocean acidification are primarily determined from prescribed emission pathways within large scale earth system models. Rather than running the cumbersome earth system models, we can use a reduced-form model to quickly emulate the CMIP5 models for projection studies under arbitrary emission pathways and for uncertainty analyses of the marine carbonate system. In this study we highlight the

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33

Evans, W., J. T. Mathis, and J. N. Cross. "Calcium carbonate corrosivity in an Alaskan inland sea." Biogeosciences 11, no. 2 (2014): 365–79. http://dx.doi.org/10.5194/bg-11-365-2014.

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Abstract. Ocean acidification is the hydrogen ion increase caused by the oceanic uptake of anthropogenic CO2, and is a focal point in marine biogeochemistry, in part, because this chemical reaction reduces calcium carbonate (CaCO3) saturation states (Ω) to levels that are corrosive (i.e., Ω ≤ 1) to shell-forming marine organisms. However, other processes can drive CaCO3 corrosivity; specifically, the addition of tidewater glacial melt. Carbonate system data collected in May and September from 2009 through 2012 in Prince William Sound (PWS), a semienclosed inland sea located on the south-centra

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Evans, W., J. T. Mathis, and J. N. Cross. "Calcium carbonate corrosivity in an Alaskan inland sea." Biogeosciences Discussions 10, no. 9 (2013): 14887–922. http://dx.doi.org/10.5194/bgd-10-14887-2013.

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Abstract. Ocean acidification is the hydrogen ion increase caused by the oceanic uptake of anthropogenic CO2, and is a focal point in marine biogeochemistry, in part, because this chemical reaction reduces calcium carbonate (CaCO3) saturation states (Ω) to levels that are corrosive (i.e. Ω ≤ 1) to shell-forming marine organisms. However, other processes can drive CaCO3 corrosivity; specifically, the addition of tidewater glacial melt. Carbonate system data collected in May and September from 2009 through 2012 in Prince William Sound (PWS), a semi-enclosed inland sea located on the south-centra

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35

Hopkins, Frances E., Parvadha Suntharalingam, Marion Gehlen, et al. "The impacts of ocean acidification on marine trace gases and the implications for atmospheric chemistry and climate." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 476, no. 2237 (2020): 20190769. http://dx.doi.org/10.1098/rspa.2019.0769.

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Surface ocean biogeochemistry and photochemistry regulate ocean–atmosphere fluxes of trace gases critical for Earth's atmospheric chemistry and climate. The oceanic processes governing these fluxes are often sensitive to the changes in ocean pH (or p CO 2 ) accompanying ocean acidification (OA), with potential for future climate feedbacks. Here, we review current understanding (from observational, experimental and model studies) on the impact of OA on marine sources of key climate-active trace gases, including dimethyl sulfide (DMS), nitrous oxide (N 2 O), ammonia and halocarbons. We focus on

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36

McGoldrick, Siobhan, Alex Zagorevski, and Dante Canil. "Geochemistry of volcanic and plutonic rocks from the Nahlin ophiolite with implications for a Permo–Triassic arc in the Cache Creek terrane, northwestern British Columbia." Canadian Journal of Earth Sciences 54, no. 12 (2017): 1214–27. http://dx.doi.org/10.1139/cjes-2017-0069.

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In northwestern British Columbia, the Permian Nahlin ophiolite in the northern Cache Creek terrane comprises spinel harzburgite tectonite with minor lherzolite, lower crustal mafic and ultramafic cumulates, gabbroic rocks including dikes intruding mantle harzburgite, and basaltic volcanic and volcaniclastic rocks. New lithogeochemical data from the Menatatuline Range area confirm that plutonic and volcanic rocks of the ophiolite are tholeiitic and arc related, while only a minor component of volcanic rocks are alkaline intraplate basalts. Tholeiitic basalts of the Nahlin ophiolite represent th

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37

Petrova, Cendra Boskanita, Lilik Maslukah, Elis Indrayanti, et al. "Carbon Dioxide Flux and its Relationship to Water Quality in the Teluk Awur - Jepara, Indonesia." Ecological Chemistry and Engineering S 31, no. 3 (2024): 315–28. http://dx.doi.org/10.2478/eces-2024-0021.

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Abstract Anthropogenic activities on land will affect the carbon system in coastal waters. This condition will affect the role of coastal waters as a source or sink of carbon. This research will examine the distribution of carbonate systems and estimate CO2 fluxes. Water samples were taken at 30 stations as well as measuring in situ water parameters including pH, temperature, salinity, and pressure. Alkalinity was analysed based on the titration method, chl-a using the fluorometer method, and carbonate system parameters (pCO2(sea) and DIC) calculated using CO2SYS.xlsm. The pCO2(atm) value is c

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Meier, K. J. S., L. Beaufort, S. Heussner, and P. Ziveri. "The role of ocean acidification in <i>Emiliania huxleyi</i> coccolith thinning in the Mediterranean Sea." Biogeosciences 11, no. 10 (2014): 2857–69. http://dx.doi.org/10.5194/bg-11-2857-2014.

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Abstract. Ocean acidification is a result of the uptake of anthropogenic CO2 from the atmosphere into the ocean and has been identified as a major environmental and economic threat. The release of several thousands of petagrams of carbon over a few hundred years will have an overwhelming effect on surface ocean carbon reservoirs. The recorded and anticipated changes in seawater carbonate chemistry will presumably affect global oceanic carbonate production. Coccolithophores as the primary calcifying phytoplankton group, and especially Emiliania huxleyi as the most abundant species have shown a

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39

Meier, K. J. S., L. Beaufort, S. Heussner, and P. Ziveri. "The role of ocean acidification in <i>Emiliania huxleyi</i> coccolith thinning in the Mediterranean Sea." Biogeosciences Discussions 10, no. 12 (2013): 19701–30. http://dx.doi.org/10.5194/bgd-10-19701-2013.

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Abstract. Ocean acidification is a result of the uptake of anthropogenic CO2 from the atmosphere into the ocean and has been identified as a major environmental and economic threat. The release of several thousands of petagrams of carbon over a few hundred years will overwhelm the capacity of the surface ocean reservoirs to absorb carbon. The recorded and anticipated changes in seawater carbonate chemistry will presumably affect the global oceanic carbonate production. Coccolithophores as the primary calcifying phytoplankton group, and especially Emiliania huxleyi as the most abundant species

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40

Menschel, Eduardo, Humberto E. González, and Ricardo Giesecke. "Coastal-oceanic distribution gradient of coccolithophores and their role in the carbonate flux of the upwelling system off Concepción, Chile (36°S)." Journal of Plankton Research 38, no. 4 (2016): 798–817. http://dx.doi.org/10.1093/plankt/fbw037.

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Fassbender, Andrea J., Simone R. Alin, Richard A. Feely, et al. "Seasonal carbonate chemistry variability in marine surface waters of the US Pacific Northwest." Earth System Science Data 10, no. 3 (2018): 1367–401. http://dx.doi.org/10.5194/essd-10-1367-2018.

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Abstract. Fingerprinting ocean acidification (OA) in US West Coast waters is extremely challenging due to the large magnitude of natural carbonate chemistry variations common to these regions. Additionally, quantifying a change requires information about the initial conditions, which is not readily available in most coastal systems. In an effort to address this issue, we have collated high-quality publicly available data to characterize the modern seasonal carbonate chemistry variability in marine surface waters of the US Pacific Northwest. Underway ship data from version 4 of the Surface Ocea

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42

Cartapanis, Olivier, Eric D. Galbraith, Daniele Bianchi, and Samuel L. Jaccard. "Carbon burial in deep-sea sediment and implications for oceanic inventories of carbon and alkalinity over the last glacial cycle." Climate of the Past 14, no. 11 (2018): 1819–50. http://dx.doi.org/10.5194/cp-14-1819-2018.

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Abstract. Although it has long been assumed that the glacial–interglacial cycles of atmospheric CO2 occurred due to increased storage of CO2 in the ocean, with no change in the size of the “active” carbon inventory, there are signs that the geological CO2 supply rate to the active pool varied significantly. The resulting changes of the carbon inventory cannot be assessed without constraining the rate of carbon removal from the system, which largely occurs in marine sediments. The oceanic supply of alkalinity is also removed by the burial of calcium carbonate in marine sediments, which plays a

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43

Xue, L., W. Yu, H. Wang, et al. "Temporal changes in surface partial pressure of carbon dioxide and carbonate saturation state in the eastern equatorial Indian Ocean during the 1962–2012 period." Biogeosciences 11, no. 22 (2014): 6293–305. http://dx.doi.org/10.5194/bg-11-6293-2014.

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Abstract. Information on changes in the oceanic carbon dioxide (CO2) concentration and air–sea CO2 flux as well as on ocean acidification in the Indian Ocean is very limited. In this study, temporal changes of the inorganic carbon system in the eastern equatorial Indian Ocean (EIO, 5° N–5° S, 90–95° E) are examined using partial pressure of carbon dioxide (pCO2) data collected in May 2012, historical pCO2 data since 1962, and total alkalinity (TA) data calculated from salinity. Results show that sea surface pCO2 in the equatorial belt (2° N–2° S, 90–95° E) increased from ∼307 μatm in April 196

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Jahn, A., K. Lindsay, X. Giraud, et al. "Carbon isotopes in the ocean model of the Community Earth System Model (CESM1)." Geoscientific Model Development 8, no. 8 (2015): 2419–34. http://dx.doi.org/10.5194/gmd-8-2419-2015.

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Abstract. Carbon isotopes in the ocean are frequently used as paleoclimate proxies and as present-day geochemical ocean tracers. In order to allow a more direct comparison of climate model results with this large and currently underutilized data set, we added a carbon isotope module to the ocean model of the Community Earth System Model (CESM), containing the cycling of the stable isotope 13C and the radioactive isotope 14C. We implemented the 14C tracer in two ways: in the "abiotic" case, the 14C tracer is only subject to air–sea gas exchange, physical transport, and radioactive decay, while

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45

Jahn, A., K. Lindsay, X. Giraud, et al. "Carbon isotopes in the ocean model of the Community Earth System Model (CESM1)." Geoscientific Model Development Discussions 7, no. 6 (2014): 7461–503. http://dx.doi.org/10.5194/gmdd-7-7461-2014.

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Abstract. Carbon isotopes in the ocean are frequently used as paleo climate proxies and as present-day geochemical ocean tracers. In order to allow a more direct comparison of climate model results with this large and currently underutilized dataset, we added a carbon isotope module to the ocean model of the Community Earth System Model (CESM), containing the cycling of the stable isotope 13C and the radioactive isotope 14C. We implemented the 14C tracer in two ways: in the "abiotic" case, the 14C tracer is only subject to air–sea gas exchange, physical transport, and radioactive decay, while

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46

Mackenzie, F. T., R. S. Arvidson, and M. Guidry. "Chemostatic modes of the ocean-atmosphere-sediment system through Phanerozoic time." Mineralogical Magazine 72, no. 1 (2008): 329–32. http://dx.doi.org/10.1180/minmag.2008.072.1.329.

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AbstractThe essential state of the Phanerozoic ocean-atmosphere system with respect to major lithophile and organic components can be bounded by sedimentary observational data and relatively few model assumptions. The model assumptions are in turn sufficient to constrain and compute the remaining fluxes that result in a comprehensive model describing atmospheric and oceanic evolutionary history over the past 500 m.y. that is in accord with the sedimentary observational data. Two central themes emerge. First, there is a strong coupling of the state of various reservoirs throughout the entire sy

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47

Hartin, Corinne A., Benjamin Bond-Lamberty, Pralit Patel, and Anupriya Mundra. "Ocean acidification over the next three centuries using a simple global climate carbon-cycle model: projections and sensitivities." Biogeosciences 13, no. 15 (2016): 4329–42. http://dx.doi.org/10.5194/bg-13-4329-2016.

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Abstract. Continued oceanic uptake of anthropogenic CO2 is projected to significantly alter the chemistry of the upper oceans over the next three centuries, with potentially serious consequences for marine ecosystems. Relatively few models have the capability to make projections of ocean acidification, limiting our ability to assess the impacts and probabilities of ocean changes. In this study we examine the ability of Hector v1.1, a reduced-form global model, to project changes in the upper ocean carbonate system over the next three centuries, and quantify the model's sensitivity to parametri

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48

Giani, Michele, Nives Ogrinc, Samo Tamše, and Stefano Cozzi. "Elevated River Inputs of the Total Alkalinity and Dissolved Inorganic Carbon in the Northern Adriatic Sea." Water 15, no. 5 (2023): 894. http://dx.doi.org/10.3390/w15050894.

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The response of coastal systems to global acidification depends strongly on river inputs, which can alter the total alkalinity (AT) and dissolved inorganic carbon (DIC) in seawater. The northern Adriatic Sea (NAd) is a shallow continental shelf region that currently receives about 15% of the total freshwater input in the Mediterranean Sea, where the role of riverine discharges on the carbonate system has been poorly studied. In particular, river discharges can alter the carbonate system in the sea, affecting both the equilibrium chemistry and biological processes. For the main rivers flowing i

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Westbroek, Peter. "The coccolithophore Emiliania huxleyi and global climate." Paleontological Society Special Publications 6 (1992): 309. http://dx.doi.org/10.1017/s2475262200008698.

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Cells of Emiliania huxleyi are surrounded by ‘coccoliths', minute, elegant scales of calcium carbonate. In all the oceans, particularly at mid-latitudes, this species forms gigantic blooms, readily visualized by satellite imagery. Coccolith-bearing organisms, of which E. huxleyi is by far the most abundant representative, are the major contributors to the ocean floor limestone sediments, and this in turn is the largest long-term sink of inorganic carbon on earth. In addition, E. huxleyi blooms emit vast amounts of dimethyl-sulphide (DMS), a gas which, on oxidation, is a dominant source of clou

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Zhai, W. D., and H. D. Zhao. "A 1-D examination of decadal air–sea re-equilibration induced ocean surface anthropogenic CO<sub>2</sub> accumulation: present status, changes from 1960s to 2000s, and future scenarios." Biogeosciences Discussions 11, no. 7 (2014): 11509–32. http://dx.doi.org/10.5194/bgd-11-11509-2014.

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Abstract. Based upon the well-understood carbonate system chemistry over global ocean surface (above the wintertime thermocline and shallower than upper 100 m), we investigated potentials of wintertime ocean surface DIC (dissolved inorganic carbon) to rise in response to the decadal air–sea re-equilibration, and the corresponding anthropogenic CO2 accumulation rates. For a reference year 2000, the potentials of wintertime DIC to rise in response to the rising atmospheric CO2 mole fraction ranged from 0.28 to 0.70 μmol kg−1 ppm−1 (ppm = parts of CO2 per million dry air) over the global open oce

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