Flux of particulate elements in the North Atlantic Ocean constrained by multiple radionuclides
Author Posting. © American Geophysical Union, 2019. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 32(12), (2019): 1738-1758, doi:10.1029/2018GB005994. Sinking part...
Published in: | Global Biogeochemical Cycles |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
American Geophysical Union
2018
|
Subjects: | |
Online Access: | https://hdl.handle.net/1912/24136 |
id |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/24136 |
---|---|
record_format |
openpolar |
spelling |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/24136 2023-05-15T17:30:09+02:00 Flux of particulate elements in the North Atlantic Ocean constrained by multiple radionuclides Hayes, Christopher T. Black, Erin E. Anderson, Robert F. Baskaran, Mark Buesseler, Ken O. Charette, Matthew A. Cheng, Hai Cochran, J. Kirk Edwards, R. Lawrence Fitzgerald, Patrick Lam, Phoebe J. Lu, Yanbin Morris, Stephanie O. Ohnemus, Daniel C. Pavia, Frank Stewart, Gillian Tang, Yi 2018-11-22 https://hdl.handle.net/1912/24136 unknown American Geophysical Union https://doi.org/10.1029/2018GB005994 Hayes, C. T., Black, E. E., Anderson, R. F., Baskaran, M., Buesseler, K. O., Charette, M. A., Cheng, H., Cochran, J. K., Edwards, R. L., Fitzgerald, P., Lam, P. J., Lu, Y., Morris, S. O., Ohnemus, D. C., Pavia, F. J., Stewart, G., & Tang, Y. (2018). Flux of particulate elements in the North Atlantic Ocean constrained by multiple radionuclides. Global Biogeochemical Cycles, 32(12), 1738-1758. https://hdl.handle.net/1912/24136 doi:10.1029/2018GB005994 Hayes, C. T., Black, E. E., Anderson, R. F., Baskaran, M., Buesseler, K. O., Charette, M. A., Cheng, H., Cochran, J. K., Edwards, R. L., Fitzgerald, P., Lam, P. J., Lu, Y., Morris, S. O., Ohnemus, D. C., Pavia, F. J., Stewart, G., & Tang, Y. (2018). Flux of particulate elements in the North Atlantic Ocean constrained by multiple radionuclides. Global Biogeochemical Cycles, 32(12), 1738-1758. doi:10.1029/2018GB005994 Biological carbon pump Trace metals North Atlantic Export GEOTRACES Article 2018 ftwhoas https://doi.org/10.1029/2018GB005994 2022-10-29T22:57:15Z Author Posting. © American Geophysical Union, 2019. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 32(12), (2019): 1738-1758, doi:10.1029/2018GB005994. Sinking particles strongly regulate the distribution of reactive chemical substances in the ocean, including particulate organic carbon and other elements (e.g., P, Cd, Mn, Cu, Co, Fe, Al, and 232Th). Yet, the sinking fluxes of trace elements have not been well described in the global ocean. The U.S. GEOTRACES campaign in the North Atlantic (GA03) offers the first data set in which the sinking flux of carbon and trace elements can be derived using four different radionuclide pairs (238U:234Th ;210Pb:210Po; 228Ra:228Th; and 234U:230Th) at stations co‐located with sediment trap fluxes for comparison. Particulate organic carbon, particulate P, and particulate Cd fluxes all decrease sharply with depth below the euphotic zone. Particulate Mn, Cu, and Co flux profiles display mixed behavior, some cases reflecting biotic remineralization, and other cases showing increased flux with depth. The latter may be related to either lateral input of lithogenic material or increased scavenging onto particles. Lastly, particulate Fe fluxes resemble fluxes of Al and 232Th, which all have increasing flux with depth, indicating a dominance of lithogenic flux at depth by resuspended sediment transported laterally to the study site. In comparing flux estimates derived using different isotope pairs, differences result from different timescales of integration and particle size fractionation effects. The range in flux estimates produced by different methods provides a robust constraint on the true removal fluxes, taking into consideration the independent uncertainties associated with each method. These estimates will be valuable targets for biogeochemical modeling and may also offer insight into particle sinking processes. This study grew out of a ... Article in Journal/Newspaper North Atlantic Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Global Biogeochemical Cycles 32 12 1738 1758 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
unknown |
topic |
Biological carbon pump Trace metals North Atlantic Export GEOTRACES |
spellingShingle |
Biological carbon pump Trace metals North Atlantic Export GEOTRACES Hayes, Christopher T. Black, Erin E. Anderson, Robert F. Baskaran, Mark Buesseler, Ken O. Charette, Matthew A. Cheng, Hai Cochran, J. Kirk Edwards, R. Lawrence Fitzgerald, Patrick Lam, Phoebe J. Lu, Yanbin Morris, Stephanie O. Ohnemus, Daniel C. Pavia, Frank Stewart, Gillian Tang, Yi Flux of particulate elements in the North Atlantic Ocean constrained by multiple radionuclides |
topic_facet |
Biological carbon pump Trace metals North Atlantic Export GEOTRACES |
description |
Author Posting. © American Geophysical Union, 2019. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 32(12), (2019): 1738-1758, doi:10.1029/2018GB005994. Sinking particles strongly regulate the distribution of reactive chemical substances in the ocean, including particulate organic carbon and other elements (e.g., P, Cd, Mn, Cu, Co, Fe, Al, and 232Th). Yet, the sinking fluxes of trace elements have not been well described in the global ocean. The U.S. GEOTRACES campaign in the North Atlantic (GA03) offers the first data set in which the sinking flux of carbon and trace elements can be derived using four different radionuclide pairs (238U:234Th ;210Pb:210Po; 228Ra:228Th; and 234U:230Th) at stations co‐located with sediment trap fluxes for comparison. Particulate organic carbon, particulate P, and particulate Cd fluxes all decrease sharply with depth below the euphotic zone. Particulate Mn, Cu, and Co flux profiles display mixed behavior, some cases reflecting biotic remineralization, and other cases showing increased flux with depth. The latter may be related to either lateral input of lithogenic material or increased scavenging onto particles. Lastly, particulate Fe fluxes resemble fluxes of Al and 232Th, which all have increasing flux with depth, indicating a dominance of lithogenic flux at depth by resuspended sediment transported laterally to the study site. In comparing flux estimates derived using different isotope pairs, differences result from different timescales of integration and particle size fractionation effects. The range in flux estimates produced by different methods provides a robust constraint on the true removal fluxes, taking into consideration the independent uncertainties associated with each method. These estimates will be valuable targets for biogeochemical modeling and may also offer insight into particle sinking processes. This study grew out of a ... |
format |
Article in Journal/Newspaper |
author |
Hayes, Christopher T. Black, Erin E. Anderson, Robert F. Baskaran, Mark Buesseler, Ken O. Charette, Matthew A. Cheng, Hai Cochran, J. Kirk Edwards, R. Lawrence Fitzgerald, Patrick Lam, Phoebe J. Lu, Yanbin Morris, Stephanie O. Ohnemus, Daniel C. Pavia, Frank Stewart, Gillian Tang, Yi |
author_facet |
Hayes, Christopher T. Black, Erin E. Anderson, Robert F. Baskaran, Mark Buesseler, Ken O. Charette, Matthew A. Cheng, Hai Cochran, J. Kirk Edwards, R. Lawrence Fitzgerald, Patrick Lam, Phoebe J. Lu, Yanbin Morris, Stephanie O. Ohnemus, Daniel C. Pavia, Frank Stewart, Gillian Tang, Yi |
author_sort |
Hayes, Christopher T. |
title |
Flux of particulate elements in the North Atlantic Ocean constrained by multiple radionuclides |
title_short |
Flux of particulate elements in the North Atlantic Ocean constrained by multiple radionuclides |
title_full |
Flux of particulate elements in the North Atlantic Ocean constrained by multiple radionuclides |
title_fullStr |
Flux of particulate elements in the North Atlantic Ocean constrained by multiple radionuclides |
title_full_unstemmed |
Flux of particulate elements in the North Atlantic Ocean constrained by multiple radionuclides |
title_sort |
flux of particulate elements in the north atlantic ocean constrained by multiple radionuclides |
publisher |
American Geophysical Union |
publishDate |
2018 |
url |
https://hdl.handle.net/1912/24136 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Hayes, C. T., Black, E. E., Anderson, R. F., Baskaran, M., Buesseler, K. O., Charette, M. A., Cheng, H., Cochran, J. K., Edwards, R. L., Fitzgerald, P., Lam, P. J., Lu, Y., Morris, S. O., Ohnemus, D. C., Pavia, F. J., Stewart, G., & Tang, Y. (2018). Flux of particulate elements in the North Atlantic Ocean constrained by multiple radionuclides. Global Biogeochemical Cycles, 32(12), 1738-1758. doi:10.1029/2018GB005994 |
op_relation |
https://doi.org/10.1029/2018GB005994 Hayes, C. T., Black, E. E., Anderson, R. F., Baskaran, M., Buesseler, K. O., Charette, M. A., Cheng, H., Cochran, J. K., Edwards, R. L., Fitzgerald, P., Lam, P. J., Lu, Y., Morris, S. O., Ohnemus, D. C., Pavia, F. J., Stewart, G., & Tang, Y. (2018). Flux of particulate elements in the North Atlantic Ocean constrained by multiple radionuclides. Global Biogeochemical Cycles, 32(12), 1738-1758. https://hdl.handle.net/1912/24136 doi:10.1029/2018GB005994 |
op_doi |
https://doi.org/10.1029/2018GB005994 |
container_title |
Global Biogeochemical Cycles |
container_volume |
32 |
container_issue |
12 |
container_start_page |
1738 |
op_container_end_page |
1758 |
_version_ |
1766125962693443584 |