Global database of oceanic particulate organic carbon to particulate ²³⁴Th ratios
The particulate export of photosynthetically fixed carbon from the surface ocean to the ocean interior is a key component of the biological carbon pump and, by extension, of the global carbon cycle. An extensively applied method to estimate the downward flux of particulate carbon is the ²³⁴Th techni...
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| Format: | Dataset |
| Language: | English |
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PANGAEA
2019
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| Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.911424 https://doi.org/10.1594/PANGAEA.911424 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.911424 |
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openpolar |
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Open Polar |
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PANGAEA - Data Publisher for Earth & Environmental Science |
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ftpangaea |
| language |
English |
| topic |
234Th C/234Th ratios carbon export global POC |
| spellingShingle |
234Th C/234Th ratios carbon export global POC Puigcorbé, Viena Global database of oceanic particulate organic carbon to particulate ²³⁴Th ratios |
| topic_facet |
234Th C/234Th ratios carbon export global POC |
| description |
The particulate export of photosynthetically fixed carbon from the surface ocean to the ocean interior is a key component of the biological carbon pump and, by extension, of the global carbon cycle. An extensively applied method to estimate the downward flux of particulate carbon is the ²³⁴Th technique, which uses the deficit of ²³⁴Th with respect to its parent, ²³⁸U, coupled with the C/²³⁴Th ratios measured in sinking. More than two decades have passed since the ²³⁴Th technique was first applied to determine the export flux of particulate carbon but the C/²³⁴Th ratio on sinking particles remains as one of the principal uncertainties of this approach. Here we present a global database of 9110 C/²³⁴Th ratios collected using in situ pumps, sediment traps and bottles. Ratios have been grouped, based on the particle size or the device used for the sampling, as: i) Large particles ii) Small particles, iii) Sediment traps and iv) Bulk. The samples were collected between 1989 and 2016 and are distributed among most of the open ocean Longhurst provinces, with some coastal areas also represented. As expected, the data are not evenly distributed along the water column, with most of the data points found in the upper 100-200 m, although the depth range expands from surface down to >5500 m. Globally, the ratios range from 0.012 to 1778 µmol/dpm. This database shows how particulate C/²³⁴Th ratios vary with time, depth, particle size and location, which is important for the application of the ²³⁴Th approach and the estimate of the global magnitude of the biological carbon pump. |
| format |
Dataset |
| author |
Puigcorbé, Viena |
| author_facet |
Puigcorbé, Viena |
| author_sort |
Puigcorbé, Viena |
| title |
Global database of oceanic particulate organic carbon to particulate ²³⁴Th ratios |
| title_short |
Global database of oceanic particulate organic carbon to particulate ²³⁴Th ratios |
| title_full |
Global database of oceanic particulate organic carbon to particulate ²³⁴Th ratios |
| title_fullStr |
Global database of oceanic particulate organic carbon to particulate ²³⁴Th ratios |
| title_full_unstemmed |
Global database of oceanic particulate organic carbon to particulate ²³⁴Th ratios |
| title_sort |
global database of oceanic particulate organic carbon to particulate ²³⁴th ratios |
| publisher |
PANGAEA |
| publishDate |
2019 |
| url |
https://doi.pangaea.de/10.1594/PANGAEA.911424 https://doi.org/10.1594/PANGAEA.911424 |
| op_coverage |
MEDIAN LATITUDE: 30.098871 * MEDIAN LONGITUDE: 179.569860 * SOUTH-BOUND LATITUDE: -77.990000 * WEST-BOUND LONGITUDE: 0.000000 * NORTH-BOUND LATITUDE: 90.000000 * EAST-BOUND LONGITUDE: -6.210701 * DATE/TIME START: 1989-04-29T00:00:00 * DATE/TIME END: 2018-06-03T00:00:00 |
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ENVELOPE(0.000000,-6.210701,90.000000,-77.990000) |
| genre |
Arctic |
| genre_facet |
Arctic |
| op_relation |
Project: U.S. JGOFS Antarctic Environment and Southern Ocean Process Study (2019). Biological and Chemical Oceanography Data Management Office (BCO-DMO), https://www.bco-dmo.org/project/2044 Project: U.S. JGOFS Arabian Sea (2019). Biological and Chemical Oceanography Data Management Office (BCO-DMO), https://www.bco-dmo.org/project/2043 Project: U.S. JGOFS Equatorial Pacific (2019). Biological and Chemical Oceanography Data Management Office (BCO-DMO), https://www.bco-dmo.org/project/2042 Alkalay, Ronen; Zlatkin, Olga; Katz, Timor; Herut, Barak; Halicz, Ludwik; Berman-Frank, Ilana; Weinstein, Yishai (2020): Carbon export and drivers in the southeastern Levantine Basin. Deep Sea Research Part II: Topical Studies in Oceanography, 171, 104713, https://doi.org/10.1016/j.dsr2.2019.104713 Amiel, David; Cochran, J Kirk (2008): Terrestrial and marine POC fluxes derived from 234Th distributions and δ13C measurements on the Mackenzie Shelf. Journal of Geophysical Research, 113(C3), https://doi.org/10.1029/2007JC004260 Amiel, David; Cochran, J Kirk; Hirschberg, David J (2002): 234Th/238U disequilibrium as an indicator of the seasonal export flux of particulate organic carbon in the North Water. Deep Sea Research Part II: Topical Studies in Oceanography, 49(22-23), 5191-5209, https://doi.org/10.1016/S0967-0645(02)00185-6 Aono, Tatsuo; Yamada, Masatoshi; Kudo, Isao; Imai, Keiri; Nojiri, Yukihiro; Tsuda, Atsushi (2005): Export fluxes of particulate organic carbon estimated from 234Th/238U disequilibrium during the Subarctic Pacific Iron Experiment for Ecosystem Dynamics Study (SEEDS 2001). Progress in Oceanography, 64(2-4), 263-282, https://doi.org/10.1016/j.pocean.2005.02.013 Bacon, Michael P; Cochran, J Kirk; Hirschberg, David J; Fleer, Alan P (1996): Export flux of carbon at the equator during the EqPac time-series cruises estimated from 234Th measurements. Deep Sea Research Part II: Topical Studies in Oceanography, 43(4-6), 1133-1153, https://doi.org/10.1016/0967-0645(96)00016-1 Baskaran, Mark; Swarzenski, Peter W; Porcelli, Don (2003): Role of colloidal material in the removal of 234Th in the Canada basin of the Arctic Ocean. Deep Sea Research Part I: Oceanographic Research Papers, 50(10-11), 1353-1373, https://doi.org/10.1016/S0967-0637(03)00140-7 Baumann, M S; Moran, S Bradley; Lomas, Michael W; Kelly, R P; Bell, D W (2013): Seasonal decoupling of particulate organic carbon export and net primary production in relation to sea-ice at the shelf break of the eastern Bering Sea: Implications for off-shelf carbon export. Journal of Geophysical Research: Oceans, 118(10), 5504-5522, https://doi.org/10.1002/jgrc.20366 Benitez-Nelson, Claudia R; Buesseler, Ken O; Crossin, Glen (2000): Upper ocean carbon export, horizontal transport, and vertical eddy diffusivity in the southwestern Gulf of Maine. Continental Shelf Research, 20(6), 707-736, https://doi.org/10.1016/S0278-4343(99)00093-X Benitez-Nelson, Claudia R; Buesseler, Ken O; Karl, David Michael; Andrews, John A (2001): A time-series study of particulate matter export in the North Pacific Subtropical Gyre based on 234Th:238U disequilibrium. Deep Sea Research Part I: Oceanographic Research Papers, 48(12), 2595-2611, https://doi.org/10.1016/S0967-0637(01)00032-2 Black, Erin; Buesseler, Ken O; Pike, Steven M; Lam, Phoebe J (2018): 234Th as a tracer of particulate export and remineralization in the southeastern tropical Pacific. Marine Chemistry, 201, 35-50, https://doi.org/10.1016/j.marchem.2017.06.009 Brew, H S; Moran, S Bradley; Lomas, Michael W; Burd, Adrian B (2009): Plankton community composition, organic carbon and thorium-234 particle size distributions, and particle export in the Sargasso Sea. Journal of Marine Research, 67(6), 845-868, https://doi.org/10.1357/002224009792006124 Buesseler, Ken O; Andrews, J E; Pike, Steven M; Charette, Matthew A; Goldson, Laura; Brzezinski, Mark A; Lance, V P (2005): Particle export during the Southern Ocean Iron Experiment (SOFeX). Limnology and Oceanography, 50(1), 311-327, https://doi.org/10.4319/lo.2005.50.1.0311 Buesseler, Ken O; Andrews, John A; Hartman, Mary C; Belastock, Rebecca; Chai, Fei (1995): Regional estimates of the export flux of particulate organic carbon derived from thorium-234 during the JGOFS EqPac program. Deep Sea Research Part II: Topical Studies in Oceanography, 42(2-3), 777-804, https://doi.org/10.1016/0967-0645(95)00043-P Buesseler, Ken O; Bacon, Michael P; Cochran, J Kirk; Livingston, H D (1992): Carbon and nitrogen export during the JGOFS North Atlantic Bloom experiment estimated from 234Th: 238U disequilibria. Deep Sea Research Part A. Oceanographic Research Papers, 39(7-8), 1115-1137, https://doi.org/10.1016/0198-0149(92)90060-7 Buesseler, Ken O; Ball, Lary A; Andrews, James; Benitez-Nelson, Claudia R; Belastock, Rebecca; Chai, Fei; Chao, Yi (1998): Upper ocean export of particulate organic carbon in the Arabian Sea derived from Thorium-234. Deep Sea Research Part II: Topical Studies in Oceanography, 45(10-11), 2461-2487, https://doi.org/10.1016/S0967-0645(98)80022-2 Buesseler, Ken O; Ball, Lary A; Andrews, John E; Cochran, J Kirk; Hirschberg, David J; Bacon, Michael P; Fleer, Alan P; Brzezinski, Mark A (2001): Upper ocean export of particulate organic carbon and biogenic silica in the Southern Ocean along 170°W. Deep Sea Research Part II: Topical Studies in Oceanography, 48(19-20), 4275-4297, https://doi.org/10.1016/S0967-0645(01)00089-3 Buesseler, Ken O; Lamborg, C H; Cai, Pinghe; Escoube, R; Johnson, Rodney J; Pike, Jennifer; Masqué, Pere; McGillicuddy, Dennis; Verdeny, E (2008): Particle fluxes associated with mesoscale eddies in the Sargasso Sea. Deep Sea Research Part II: Topical Studies in Oceanography, 55(10-13), 1426-1444, https://doi.org/10.1016/j.dsr2.2008.02.007 Buesseler, Ken O; McDonnell, Andrew; Schofield, Oscar; Steinberg, Deborah K; Ducklow, Hugh W (2010): High particle export over the continental shelf of the west Antarctic Peninsula. Geophysical Research Letters, 37(22), L22606, https://doi.org/10.1029/2010GL045448 Buesseler, Ken O; Michaels, Anthony F; Siegel, David A; Knap, Anthony H (1994): A three dimensional time-dependent approach to calibrating sediment trap fluxes. Global Biogeochemical Cycles, 8(2), 179-193, https://doi.org/10.1029/94GB00207 Buesseler, Ken O; Pike, Steven M; Maiti, Kanchan; Lamborg, C H; Siegel, David A; Trull, Tom W (2009): Thorium-234 as a tracer of spatial, temporal and vertical variability in particle flux in the North Pacific. Deep Sea Research Part I: Oceanographic Research Papers, 56(7), 1143-1167, https://doi.org/10.1016/j.dsr.2009.04.001 Buesseler, Ken O; Steinberg, Deborah K; Michaels, Anthony F; Johnson, Rodney J; Andrews, John E; Valdes, J R; Price, James F (2000): A comparison of the quantity and composition of material caught in a neutrally buoyant versus surface-tethered sediment trap. Deep Sea Research Part I: Oceanographic Research Papers, 47(2), 277-294, https://doi.org/10.1016/S0967-0637(99)00056-4 Cai, Pinghe; Chen, Weifang; Dai, Minhan; Wan, Zhenwen; Wang, Dongxiao; Li, Qing; Tang, Tiantian; Lv, Dongwei (2008): A high-resolution study of particle export in the southern South China Sea based on 234Th:238U disequilibrium. Journal of Geophysical Research, 113(C4), C04019, https://doi.org/10.1029/2007JC004268 Cai, Pinghe; Dai, Minhan; Chen, Weifang; Tang, Tiantian; Zhou, Kuanbo (2006): On the importance of the decay of 234Th in determining size-fractionated C/234Th ratio on marine particles. Geophysical Research Letters, 33(23), L23602, https://doi.org/10.1029/2006GL027792 Cai, Pinghe; Huang, Yipu; Chen, Min; Liu, Guangshan; Qiu, Yusheng (2001): Export of particulate organic carbon estimated from 234Th-238U disequilibria and its temporal variation in the South China Sea. Chinese Science Bulletin, 46(20), 1722-1726, https://doi.org/10.1007/BF02900660 Cai, Pinghe; Rutgers van der Loeff, Michiel M; Stimac, Ingrid; Nöthig, Eva-Maria; Lepore, Kate; Moran, S Bradley (2010): Low export flux of particulate organic carbon in the central Arctic Ocean as revealed by 234Th:238U disequilibrium. Journal of Geophysical Research: Oceans, 115, C10037, https://doi.org/10.1029/2009JC005595 Cai, Pinghe; Zhao, Daochen; Wang, Lei; Huang, Bangqin; Dai, Minhan (2015): Role of particle stock and phytoplankton community structure in regulating particulate organic carbon export in a large marginal sea. Journal of Geophysical Research: Oceans, 120(3), 2063-2095, https://doi.org/10.1002/2014JC010432 Ceballos-Romero, Elena; et al.: Location: Central Arctic Ocean, voyage: PS94, 20 Aug to 8 Oct 2015. (unpublished dataset) Ceballos-Romero, Elena; Le Moigne, Frédéric A C; Henson, Stephanie A; Marsay, Christopher M; Sanders, Richard J; García-Tenorio, Rafael; Villa-Alfageme, María (2016): Influence of bloom dynamics on Particle Export Efficiency in the North Atlantic: a comparative study of radioanalytical techniques and sediment traps. Marine Chemistry, 186, 198-210, https://doi.org/10.1016/j.marchem.2016.10.001 Charette, Matthew A; Moran, S Bradley (1999): Rates of particle scavenging and particulate organic carbon export estimated using 234Th as a tracer in the subtropical and equatorial Atlantic Ocean. Deep Sea Research Part II: Topical Studies in Oceanography, 46(5), 885-906, https://doi.org/10.1016/S0967-0645(99)00006-5 Charette, Matthew A; Moran, S Bradley; Bishop, James K B (1999): 234Th as a tracer of particulate organic carbon export in the subarctic Northeast Pacific Ocean. Deep Sea Research Part II: Topical Studies in Oceanography, 46(11-12), 2833-2861, https://doi.org/10.1016/S0967-0645(99)00085-5 Charette, Matthew A; Moran, S Bradley; Pike, Steven M; Smith, John N (2001): Investigating the carbon cycle in the Gulf of Maine using the natural tracer thorium 234. Journal of Geophysical Research, 106(C6), 11553, https://doi.org/10.1029/1999JC000277 Chen, Min; Huang, Yipu; Cai, Pinghe; Guo, Laodong (2003): Particulate Organic Carbon Export Fluxes in The Canada Basin and Bering Sea as Derived from 234Th/238U Disequilibria. Arctic, 56(1), https://doi.org/10.14430/arctic600 Chen, Weifang; Cai, Pinghe; Dai, Minhan; Wei, Junfeng (2008): 234Th/238U disequilibrium and particulate organic carbon export in the northern South China Sea. Journal of Oceanography, 64(3), 417-428, https://doi.org/10.1007/s10872-008-0035-z Cochran, J Kirk; Barnes, Christina; Achman, Diane; Hirschberg, David J (1995): Thorium-234/uranium-238 disequilibrium as an indicator of scavenging rates and participate organic carbon fluxes in the Northeast Water Polynya, Greenland. Journal of Geophysical Research: Oceans, 100(C3), 4399-4410, https://doi.org/10.1029/94JC01954 Cochran, J Kirk; Buesseler, Ken O; Bacon, Michael P; Wang, H W; Hirschberg, David J; Ball, Lary A; Andrews, John A; Crossin, Glen; Fleer, Alan P (2000): Short-lived thorium isotopes (234Th, 228Th) as indicators of POC export and particle cycling in the Ross Sea, Southern Ocean. Deep Sea Research Part II: Topical Studies in Oceanography, 47(15-16), 3451-3490, https://doi.org/10.1016/S0967-0645(00)00075-8 Coppola, L; Roy-Barman, Matthieu; Mulsow, S; Povinec, P; Jeandel, Catherine (2005): Low particulate organic carbon export in the frontal zone of the Southern Ocean (Indian sector) revealed by 234Th. Deep Sea Research Part I: Oceanographic Research Papers, 52(1), 51-68, https://doi.org/10.1016/j.dsr.2004.07.020 Coppola, Laurent; Roy-Barman, Matthieu; Wassmann, Paul; Mulsow, Sandor; Jeandel, Catherine (2002): Calibration of sediment traps and particulate organic carbon export using 234 Th in the Barents Sea. Marine Chemistry, 80(1), 11-26, https://doi.org/10.1016/S0304-4203(02)00071-3 Dai, Minhan; Benitez-Nelson, Claudia R (2001): Colloidal organic carbon and 234Th in the Gulf of Maine. Marine Chemistry, 74(2-3), 181-196, https://doi.org/10.1016/S0304-4203(01)00012-3 Evangeliou, Nikolaos; Florou, Heleny; Psomiadou, Chrysoula (2013): Size-fractionated particulate organic carbon (POC) export fluxes estimated using 234Th-238U disequilibria in the Saronikos Gulf (Greece) during winter bloom. Fresenius Environmental Bulletin, 22 (7a), 1951-1961, https://folk.nilu.no/~nikolaos/3.List.of.pubs/Evangeliou_FEB_2013.pdf Foster, Jane M; Shimmield, Graham (2002): 234Th as a tracer of particle flux and POC export in the northern North Sea during a coccolithophore bloom. Deep Sea Research Part II: Topical Studies in Oceanography, 49(15), 2965-2977, https://doi.org/10.1016/S0967-0645(02)00066-8 Friedrich, Jana; Rutgers van der Loeff, Michiel M (2002): A two-tracer (210Po–234Th) approach to distinguish organic carbon and biogenic silica export flux in the Antarctic Circumpolar Current. Deep Sea Research Part I: Oceanographic Research Papers, 49(1), 101-120, https://doi.org/10.1016/S0967-0637(01)00045-0 Giuliani, Silvia; Radakovitch, Olivier; Frignani, Mauro; Bellucci, Luca Giorgio (2007): Short time scale variations of 234Th/238U disequilibrium related to mesoscale variability on the continental slope of the Gulf of Lions (France). Marine Chemistry, 106(3-4), 403-418, https://doi.org/10.1016/j.marchem.2007.03.007 Guo, Laodong; Hung, Chin-Chang; Santschi, Peter Hans; Walsh, Ian D (2002): 234Th scavenging and its relationship to acid polysaccharide abundance in the Gulf of Mexico. Marine Chemistry, 78(2-3), 103-119, https://doi.org/10.1016/S0304-4203(02)00012-9 Gustafsson, Örjan; Andersson, Per S (2012): 234Th-derived surface export fluxes of POC from the Northern Barents Sea and the Eurasian sector of the Central Arctic Ocean. Deep Sea Research Part I: Oceanographic Research Papers, 68, 1-11, https://doi.org/10.1016/j.dsr.2012.05.014 Gustafsson, Örjan; Gschwend, Philip M; Buesseler, Ken O (1997): Using 234Th disequilibria to estimate the vertical removal rates of polycyclic aromatic hydrocarbons from the surface ocean. Marine Chemistry, 57(1-2), 11-23, https://doi.org/10.1016/S0304-4203(97)00011-X Gustafsson, Örjan; Larsson, Jenny; Andersson, Per S; Ingri, Johan (2006): The POC/234Th ratio of settling particles isolated using split flow-thin cell fractionation (SPLITT). Marine Chemistry, 100(3-4), 314-322, https://doi.org/10.1016/j.marchem.2005.10.018 Hall, Ian R; Schmidt, Sabine; McCave, I Nick; Reyss, Jean-Louis (2000): Particulate matter distribution and disequilibrium along the Northern Iberian Margin: implications for particulate organic carbon export. Deep Sea Research Part I: Oceanographic Research Papers, 47(4), 557-582, https://doi.org/10.1016/S0967-0637(99)00065-5 |
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CC-BY-NC-4.0: Creative Commons Attribution-NonCommercial 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
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https://doi.org/10.1594/PANGAEA.91142410.1016/j.dsr2.2019.10471310.1029/2007JC00426010.1016/S0967-0645(02)00185-610.1016/j.pocean.2005.02.01310.1016/0967-0645(96)00016-110.1016/S0967-0637(03)00140-710.1002/jgrc.2036610.1016/S0278-4343(99)00093-X10.1016/S0 |
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1799471688235089920 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.911424 2024-05-19T07:33:35+00:00 Global database of oceanic particulate organic carbon to particulate ²³⁴Th ratios Puigcorbé, Viena MEDIAN LATITUDE: 30.098871 * MEDIAN LONGITUDE: 179.569860 * SOUTH-BOUND LATITUDE: -77.990000 * WEST-BOUND LONGITUDE: 0.000000 * NORTH-BOUND LATITUDE: 90.000000 * EAST-BOUND LONGITUDE: -6.210701 * DATE/TIME START: 1989-04-29T00:00:00 * DATE/TIME END: 2018-06-03T00:00:00 2019 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.911424 https://doi.org/10.1594/PANGAEA.911424 en eng PANGAEA Project: U.S. JGOFS Antarctic Environment and Southern Ocean Process Study (2019). Biological and Chemical Oceanography Data Management Office (BCO-DMO), https://www.bco-dmo.org/project/2044 Project: U.S. JGOFS Arabian Sea (2019). Biological and Chemical Oceanography Data Management Office (BCO-DMO), https://www.bco-dmo.org/project/2043 Project: U.S. JGOFS Equatorial Pacific (2019). Biological and Chemical Oceanography Data Management Office (BCO-DMO), https://www.bco-dmo.org/project/2042 Alkalay, Ronen; Zlatkin, Olga; Katz, Timor; Herut, Barak; Halicz, Ludwik; Berman-Frank, Ilana; Weinstein, Yishai (2020): Carbon export and drivers in the southeastern Levantine Basin. Deep Sea Research Part II: Topical Studies in Oceanography, 171, 104713, https://doi.org/10.1016/j.dsr2.2019.104713 Amiel, David; Cochran, J Kirk (2008): Terrestrial and marine POC fluxes derived from 234Th distributions and δ13C measurements on the Mackenzie Shelf. Journal of Geophysical Research, 113(C3), https://doi.org/10.1029/2007JC004260 Amiel, David; Cochran, J Kirk; Hirschberg, David J (2002): 234Th/238U disequilibrium as an indicator of the seasonal export flux of particulate organic carbon in the North Water. Deep Sea Research Part II: Topical Studies in Oceanography, 49(22-23), 5191-5209, https://doi.org/10.1016/S0967-0645(02)00185-6 Aono, Tatsuo; Yamada, Masatoshi; Kudo, Isao; Imai, Keiri; Nojiri, Yukihiro; Tsuda, Atsushi (2005): Export fluxes of particulate organic carbon estimated from 234Th/238U disequilibrium during the Subarctic Pacific Iron Experiment for Ecosystem Dynamics Study (SEEDS 2001). Progress in Oceanography, 64(2-4), 263-282, https://doi.org/10.1016/j.pocean.2005.02.013 Bacon, Michael P; Cochran, J Kirk; Hirschberg, David J; Fleer, Alan P (1996): Export flux of carbon at the equator during the EqPac time-series cruises estimated from 234Th measurements. Deep Sea Research Part II: Topical Studies in Oceanography, 43(4-6), 1133-1153, https://doi.org/10.1016/0967-0645(96)00016-1 Baskaran, Mark; Swarzenski, Peter W; Porcelli, Don (2003): Role of colloidal material in the removal of 234Th in the Canada basin of the Arctic Ocean. Deep Sea Research Part I: Oceanographic Research Papers, 50(10-11), 1353-1373, https://doi.org/10.1016/S0967-0637(03)00140-7 Baumann, M S; Moran, S Bradley; Lomas, Michael W; Kelly, R P; Bell, D W (2013): Seasonal decoupling of particulate organic carbon export and net primary production in relation to sea-ice at the shelf break of the eastern Bering Sea: Implications for off-shelf carbon export. Journal of Geophysical Research: Oceans, 118(10), 5504-5522, https://doi.org/10.1002/jgrc.20366 Benitez-Nelson, Claudia R; Buesseler, Ken O; Crossin, Glen (2000): Upper ocean carbon export, horizontal transport, and vertical eddy diffusivity in the southwestern Gulf of Maine. Continental Shelf Research, 20(6), 707-736, https://doi.org/10.1016/S0278-4343(99)00093-X Benitez-Nelson, Claudia R; Buesseler, Ken O; Karl, David Michael; Andrews, John A (2001): A time-series study of particulate matter export in the North Pacific Subtropical Gyre based on 234Th:238U disequilibrium. Deep Sea Research Part I: Oceanographic Research Papers, 48(12), 2595-2611, https://doi.org/10.1016/S0967-0637(01)00032-2 Black, Erin; Buesseler, Ken O; Pike, Steven M; Lam, Phoebe J (2018): 234Th as a tracer of particulate export and remineralization in the southeastern tropical Pacific. Marine Chemistry, 201, 35-50, https://doi.org/10.1016/j.marchem.2017.06.009 Brew, H S; Moran, S Bradley; Lomas, Michael W; Burd, Adrian B (2009): Plankton community composition, organic carbon and thorium-234 particle size distributions, and particle export in the Sargasso Sea. Journal of Marine Research, 67(6), 845-868, https://doi.org/10.1357/002224009792006124 Buesseler, Ken O; Andrews, J E; Pike, Steven M; Charette, Matthew A; Goldson, Laura; Brzezinski, Mark A; Lance, V P (2005): Particle export during the Southern Ocean Iron Experiment (SOFeX). Limnology and Oceanography, 50(1), 311-327, https://doi.org/10.4319/lo.2005.50.1.0311 Buesseler, Ken O; Andrews, John A; Hartman, Mary C; Belastock, Rebecca; Chai, Fei (1995): Regional estimates of the export flux of particulate organic carbon derived from thorium-234 during the JGOFS EqPac program. Deep Sea Research Part II: Topical Studies in Oceanography, 42(2-3), 777-804, https://doi.org/10.1016/0967-0645(95)00043-P Buesseler, Ken O; Bacon, Michael P; Cochran, J Kirk; Livingston, H D (1992): Carbon and nitrogen export during the JGOFS North Atlantic Bloom experiment estimated from 234Th: 238U disequilibria. Deep Sea Research Part A. Oceanographic Research Papers, 39(7-8), 1115-1137, https://doi.org/10.1016/0198-0149(92)90060-7 Buesseler, Ken O; Ball, Lary A; Andrews, James; Benitez-Nelson, Claudia R; Belastock, Rebecca; Chai, Fei; Chao, Yi (1998): Upper ocean export of particulate organic carbon in the Arabian Sea derived from Thorium-234. Deep Sea Research Part II: Topical Studies in Oceanography, 45(10-11), 2461-2487, https://doi.org/10.1016/S0967-0645(98)80022-2 Buesseler, Ken O; Ball, Lary A; Andrews, John E; Cochran, J Kirk; Hirschberg, David J; Bacon, Michael P; Fleer, Alan P; Brzezinski, Mark A (2001): Upper ocean export of particulate organic carbon and biogenic silica in the Southern Ocean along 170°W. Deep Sea Research Part II: Topical Studies in Oceanography, 48(19-20), 4275-4297, https://doi.org/10.1016/S0967-0645(01)00089-3 Buesseler, Ken O; Lamborg, C H; Cai, Pinghe; Escoube, R; Johnson, Rodney J; Pike, Jennifer; Masqué, Pere; McGillicuddy, Dennis; Verdeny, E (2008): Particle fluxes associated with mesoscale eddies in the Sargasso Sea. 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Deep Sea Research Part I: Oceanographic Research Papers, 47(4), 557-582, https://doi.org/10.1016/S0967-0637(99)00065-5 CC-BY-NC-4.0: Creative Commons Attribution-NonCommercial 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess 234Th C/234Th ratios carbon export global POC Dataset 2019 ftpangaea https://doi.org/10.1594/PANGAEA.91142410.1016/j.dsr2.2019.10471310.1029/2007JC00426010.1016/S0967-0645(02)00185-610.1016/j.pocean.2005.02.01310.1016/0967-0645(96)00016-110.1016/S0967-0637(03)00140-710.1002/jgrc.2036610.1016/S0278-4343(99)00093-X10.1016/S0 2024-04-30T23:34:34Z The particulate export of photosynthetically fixed carbon from the surface ocean to the ocean interior is a key component of the biological carbon pump and, by extension, of the global carbon cycle. An extensively applied method to estimate the downward flux of particulate carbon is the ²³⁴Th technique, which uses the deficit of ²³⁴Th with respect to its parent, ²³⁸U, coupled with the C/²³⁴Th ratios measured in sinking. More than two decades have passed since the ²³⁴Th technique was first applied to determine the export flux of particulate carbon but the C/²³⁴Th ratio on sinking particles remains as one of the principal uncertainties of this approach. Here we present a global database of 9110 C/²³⁴Th ratios collected using in situ pumps, sediment traps and bottles. Ratios have been grouped, based on the particle size or the device used for the sampling, as: i) Large particles ii) Small particles, iii) Sediment traps and iv) Bulk. The samples were collected between 1989 and 2016 and are distributed among most of the open ocean Longhurst provinces, with some coastal areas also represented. As expected, the data are not evenly distributed along the water column, with most of the data points found in the upper 100-200 m, although the depth range expands from surface down to >5500 m. Globally, the ratios range from 0.012 to 1778 µmol/dpm. This database shows how particulate C/²³⁴Th ratios vary with time, depth, particle size and location, which is important for the application of the ²³⁴Th approach and the estimate of the global magnitude of the biological carbon pump. Dataset Arctic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(0.000000,-6.210701,90.000000,-77.990000) |