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Browsing Woods Hole Oceanographic Institution by Author "Adkins, Jess F."
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ArticleAuthigenic Formation of Clay Minerals in the Abyssal North Pacific(American Geophysical Union, 2022-11-02) Steiner, Zvi ; Rae, James W. B. ; Berelson, William M. ; Adkins, Jess F. ; Hou, Yi ; Dong, Sijia ; Lampronti, Giulio I. ; Liu, Xuewu ; Achterberg, Eric P. ; Subhas, Adam V. ; Turchyn, Alexandra V.Present estimates of the biogeochemical cycles of calcium, strontium, and potassium in the ocean reveal large imbalances between known input and output fluxes. Using pore fluid, incubation, and solid sediment data from North Pacific multi‐corer cores we show that, contrary to the common paradigm, the top centimeters of abyssal sediments can be an active site of authigenic precipitation of clay minerals. In this region, clay authigenesis is the dominant sink for potassium and strontium and consumes nearly all calcium released from benthic dissolution of calcium carbonates. These observations support the idea that clay authigenesis occurring over broad regions of the world ocean may be a major buffer for ocean chemistry on the time scale of the ocean overturning circulation, and key to the long‐term stability of Earth's climate.Key PointsNorth Pacific red clay sediments are a sink for marine calcium, strontium, and potassiumAuthigenic formation of clay minerals is prevalent in pelagic sediments throughout the North PacificThe main mechanism for clay formation is recrystallization of aluminosilicates, neoformation can occur in biogenic silica rich sediments
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DatasetCarbonate chemistry and CTD data collected along a North Pacific transect between Hawaii and Alaska on R/V Kilo Moana cruise KM1712 in August 2017(Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2022-02-01) Dong, Sijia ; Liu, Xuewu ; Naviaux, John D. ; Subhas, Adam V. ; Rollins, Nick E. ; Adkins, Jess F. ; Berelson, William M.This dataset includes carbonate chemistry and general measurements from CTD casts at 6 stations between Hawaii and Alaska. Data were collected in August 2017 onboard R/V Kilo Moana. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/836954
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DatasetCarbonate chemistry and CTD data collected along a North Pacific transect between Hawaii and Alaska on R/V Kilo Moana cruise KM1712 in August 2017(Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2021-01-20) Dong, Sijia ; Liu, Xuewu ; Naviaux, John D. ; Subhas, Adam V. ; Rollins, Nick E. ; Adkins, Jess F. ; Berelson, William M.This dataset includes carbonate chemistry and general measurements from CTD casts at 6 stations between Hawaii and Alaska. Data were collected in August 2017 onboard R/V Kilo Moana. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/836954
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ArticleGlobal reorganization of deep-sea circulation and carbon storage after the last ice age(American Association for the Advancement of Science, 2022-11-16) Rafter, Patrick A. ; Gray, William R. ; Hines, Sophia K. V. ; Burke, Andrea ; Costa, Kassandra M. ; Gottschalk, Julia ; Hain, Mathis P. ; Rae, James W. B. ; Southon, John R. ; Walczak, Maureen H. ; Yu, Jimin ; Adkins, Jess F. ; DeVries, TimothyUsing new and published marine fossil radiocarbon (C/C) measurements, a tracer uniquely sensitive to circulation and air-sea gas exchange, we establish several benchmarks for Atlantic, Southern, and Pacific deep-sea circulation and ventilation since the last ice age. We find the most C-depleted water in glacial Pacific bottom depths, rather than the mid-depths as they are today, which is best explained by a slowdown in glacial deep-sea overturning in addition to a "flipped" glacial Pacific overturning configuration. These observations cannot be produced by changes in air-sea gas exchange alone, and they underscore the major role for changes in the overturning circulation for glacial deep-sea carbon storage in the vast Pacific abyss and the concomitant drawdown of atmospheric CO.
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DatasetIn situ experimentally determined dissolution rates of biogenic calcites along a North Pacific transect between Hawaii and Alaska (KM1712 expedition) in August 2017(Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2022-08-03) Berelson, William M. ; Adkins, Jess F. ; Subhas, Adam V. ; Dong, Sijia ; Naviaux, John D.This dataset includes biogenic and inorganic calcite and aragonite dissolution rates from the CDisK-IV cruise in the North Pacific Ocean, August 2017. We include niskin incubator alkalinity, pH, silicate, phosphate, and nitrate data, as well as calculated saturation state and dissolution rates. Rates are reported in units of g/g/day and also g/cm2/day, normalized by the specific surface areas of the materials used. Dissolution rates of inorganic aragonite and calcite, along with biogenic E. huxleyi liths, a planktic foraminifera assemblage, and a benthic foraminifera Amphistegina species, are provided, for 4 out of the 6 stations occupied on the cruise. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/856409
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DatasetIn situ experimentally determined dissolution rates of biogenic calcites along a North Pacific transect between Hawaii and Alaska (KM1712 expedition) in August 2017(Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2021-08-20) Berelson, William M. ; Adkins, Jess F. ; Subhas, Adam V. ; Dong, Sijia ; Naviaux, John D.This dataset includes biogenic and inorganic calcite and aragonite dissolution rate data from the CDisK-IV cruise in the North Pacific Ocean, August 2017. We include niskin incubator alkalinity, pH, silicate, phosphate, and nitrate data, as well as calculated saturation state and dissolution rates. Rates are reported in units of g/g/day and also g/cm2/day, normalized by the specific surface areas of the materials used. Dissolution rates of inorganic aragonite and calcite, along with biogenic E. huxleyi liths, a planktic foraminifera assemblage, and a benthic foraminifera Amphistegina species, are provided, for 4 out of the 6 stations occupied on the cruise. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/856409
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ArticlePelagic calcium carbonate production and shallow dissolution in the North Pacific Ocean(Nature Research, 2023-02-20) Ziveri, Patrizia ; Gray, William Robert ; Anglada-Ortiz, Griselda ; Manno, Clara ; Grelaud, Michael ; Incarbona, Alessandro ; Rae, James William Buchanan ; Subhas, Adam V. ; Pallacks, Sven ; White, Angelicque ; Adkins, Jess F. ; Berelson, WilliamPlanktonic calcifying organisms play a key role in regulating ocean carbonate chemistry and atmospheric CO. Surprisingly, references to the absolute and relative contribution of these organisms to calcium carbonate production are lacking. Here we report quantification of pelagic calcium carbonate production in the North Pacific, providing new insights on the contribution of the three main planktonic calcifying groups. Our results show that coccolithophores dominate the living calcium carbonate (CaCO) standing stock, with coccolithophore calcite comprising ~90% of total CaCO production, and pteropods and foraminifera playing a secondary role. We show that pelagic CaCO production is higher than the sinking flux of CaCO at 150 and 200 m at ocean stations ALOHA and PAPA, implying that a large portion of pelagic calcium carbonate is remineralised within the photic zone; this extensive shallow dissolution explains the apparent discrepancy between previous estimates of CaCO production derived from satellite observations/biogeochemical modeling versus estimates from shallow sediment traps. We suggest future changes in the CaCO cycle and its impact on atmospheric CO will largely depend on how the poorly-understood processes that determine whether CaCO is remineralised in the photic zone or exported to depth respond to anthropogenic warming and acidification.
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DatasetSinking PIC, PC in shallow sediment traps collected along a North Pacific transect between Hawaii and Alaska on R/V Kilo Moana cruise KM1712 in August 2017(Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2021-09-23) Dong, Sijia ; Berelson, William M. ; Adkins, Jess F. ; Subhas, Adam V. ; Rollins, Nick E.This dataset includes general measurements for sediment trap casts at 5 stations along a transect between Hawaii and Alaska. Data was collected in August 2017 onboard R/V Kilo Moana cruise KM1712. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/860424
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DatasetSuspended PIC, PC, PN data collected along a North Pacific transect between Hawaii and Alaska on R/V Kilo Moana cruise KM1712 in August 2017(Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2021-09-23) Dong, Sijia ; Berelson, William M. ; Adkins, Jess F. ; Subhas, Adam V. ; Rollins, Nick E.This dataset includes general measurements for in situ pump casts at 5 stations on a transect between Hawaii and Alaska. Data was collected in August 2017 onboard R/V Kilo Moana cruise KM1712. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/860409