Organic carbon accumulation in the South Atlantic Ocean
A compilation of 1118 surface sediment samples from the South Atlantic was used to map modern seafloor distribution of organic carbon content in this ocean basin. Using new data on Holocene sedimentation rates, we estimated the annual organic carbon accumulation in the pelagic realm (>3000 m wate...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.735988 2023-05-15T18:21:21+02:00 Organic carbon accumulation in the South Atlantic Ocean Mollenhauer, Gesine Schneider, Ralph R Jennerjahn, Tim C Müller, Peter J Wefer, Gerold MEDIAN LATITUDE: -24.023474 * MEDIAN LONGITUDE: -15.064098 * SOUTH-BOUND LATITUDE: -49.999300 * WEST-BOUND LONGITUDE: -59.733333 * NORTH-BOUND LATITUDE: 10.000000 * EAST-BOUND LONGITUDE: 19.760000 * DATE/TIME START: 1957-03-12T00:00:00 * DATE/TIME END: 2000-08-20T00:00:00 2004-03-31 application/zip, 5 datasets https://doi.pangaea.de/10.1594/PANGAEA.735988 https://doi.org/10.1594/PANGAEA.735988 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.735988 https://doi.org/10.1594/PANGAEA.735988 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Mollenhauer, Gesine; Schneider, Ralph R; Jennerjahn, Tim C; Müller, Peter J; Wefer, Gerold (2004): Organic carbon accumulation in the South Atlantic Ocean: its modern, mid-Holocene and last glacial distribution. Global and Planetary Change, 40(3-4), 249-266, https://doi.org/10.1016/j.gloplacha.2003.08.002 0016PG 0036PG 0050PG 0055PG 0058PG 0066PG 0071PG 0075PG 0082PG 0091PG 06MT28_2 108-663B 159-959C 159-962B 175-1082A 175-1084A 371 373 375 376 377 379 380 381 382 383 384 386 86014-12PC51 A-10-VG A150/180 A-15-VG A-16-BG A-17-BG A180-72 A180-73 A180-74 A180-76 A-19-VG A-1-VG A-20-BG A-21 A210709-0131PG A-23-VG A-24 A-25-BG A-26-VG A-27-VG A-28-BG A-29-BG Dataset 2004 ftpangaea https://doi.org/10.1594/PANGAEA.735988 https://doi.org/10.1016/j.gloplacha.2003.08.002 2023-01-20T07:31:43Z A compilation of 1118 surface sediment samples from the South Atlantic was used to map modern seafloor distribution of organic carbon content in this ocean basin. Using new data on Holocene sedimentation rates, we estimated the annual organic carbon accumulation in the pelagic realm (>3000 m water depth) to be approximately 1.8*10**12 g C/year. In the sediments underlying the divergence zone in the Eastern Equatorial Atlantic (EEA), only small amounts of organic carbon accumulate in spite of the high surface water productivity observed in that area. This implies that in the Eastern Equatorial Atlantic, organic carbon accumulation is strongly reduced by efficient degradation of organic matter prior to its burial. During the Last Glacial Maximum (LGM), accumulation of organic carbon was higher than during the mid-Holocene along the continental margins of Africa and South America (Brazil) as well as in the equatorial region. In the Eastern Equatorial Atlantic in particular, large relative differences between LGM and mid-Holocene accumulation rates are found. This is probably to a great extent due to better preservation of organic matter related to changes in bottom water circulation and not just a result of strongly enhanced export productivity during the glacial period. On average, a two- to three-fold increase in organic carbon accumulation during the LGM compared to mid-Holocene conditions can be deduced from our cores. However, for the deep-sea sediments this cannot be solely attributed to a glacial productivity increase, as changes in South Atlantic deep-water circulation seem to result in better organic carbon preservation during the LGM. Dataset South Atlantic Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-59.733333,19.760000,10.000000,-49.999300) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
0016PG 0036PG 0050PG 0055PG 0058PG 0066PG 0071PG 0075PG 0082PG 0091PG 06MT28_2 108-663B 159-959C 159-962B 175-1082A 175-1084A 371 373 375 376 377 379 380 381 382 383 384 386 86014-12PC51 A-10-VG A150/180 A-15-VG A-16-BG A-17-BG A180-72 A180-73 A180-74 A180-76 A-19-VG A-1-VG A-20-BG A-21 A210709-0131PG A-23-VG A-24 A-25-BG A-26-VG A-27-VG A-28-BG A-29-BG |
spellingShingle |
0016PG 0036PG 0050PG 0055PG 0058PG 0066PG 0071PG 0075PG 0082PG 0091PG 06MT28_2 108-663B 159-959C 159-962B 175-1082A 175-1084A 371 373 375 376 377 379 380 381 382 383 384 386 86014-12PC51 A-10-VG A150/180 A-15-VG A-16-BG A-17-BG A180-72 A180-73 A180-74 A180-76 A-19-VG A-1-VG A-20-BG A-21 A210709-0131PG A-23-VG A-24 A-25-BG A-26-VG A-27-VG A-28-BG A-29-BG Mollenhauer, Gesine Schneider, Ralph R Jennerjahn, Tim C Müller, Peter J Wefer, Gerold Organic carbon accumulation in the South Atlantic Ocean |
topic_facet |
0016PG 0036PG 0050PG 0055PG 0058PG 0066PG 0071PG 0075PG 0082PG 0091PG 06MT28_2 108-663B 159-959C 159-962B 175-1082A 175-1084A 371 373 375 376 377 379 380 381 382 383 384 386 86014-12PC51 A-10-VG A150/180 A-15-VG A-16-BG A-17-BG A180-72 A180-73 A180-74 A180-76 A-19-VG A-1-VG A-20-BG A-21 A210709-0131PG A-23-VG A-24 A-25-BG A-26-VG A-27-VG A-28-BG A-29-BG |
description |
A compilation of 1118 surface sediment samples from the South Atlantic was used to map modern seafloor distribution of organic carbon content in this ocean basin. Using new data on Holocene sedimentation rates, we estimated the annual organic carbon accumulation in the pelagic realm (>3000 m water depth) to be approximately 1.8*10**12 g C/year. In the sediments underlying the divergence zone in the Eastern Equatorial Atlantic (EEA), only small amounts of organic carbon accumulate in spite of the high surface water productivity observed in that area. This implies that in the Eastern Equatorial Atlantic, organic carbon accumulation is strongly reduced by efficient degradation of organic matter prior to its burial. During the Last Glacial Maximum (LGM), accumulation of organic carbon was higher than during the mid-Holocene along the continental margins of Africa and South America (Brazil) as well as in the equatorial region. In the Eastern Equatorial Atlantic in particular, large relative differences between LGM and mid-Holocene accumulation rates are found. This is probably to a great extent due to better preservation of organic matter related to changes in bottom water circulation and not just a result of strongly enhanced export productivity during the glacial period. On average, a two- to three-fold increase in organic carbon accumulation during the LGM compared to mid-Holocene conditions can be deduced from our cores. However, for the deep-sea sediments this cannot be solely attributed to a glacial productivity increase, as changes in South Atlantic deep-water circulation seem to result in better organic carbon preservation during the LGM. |
format |
Dataset |
author |
Mollenhauer, Gesine Schneider, Ralph R Jennerjahn, Tim C Müller, Peter J Wefer, Gerold |
author_facet |
Mollenhauer, Gesine Schneider, Ralph R Jennerjahn, Tim C Müller, Peter J Wefer, Gerold |
author_sort |
Mollenhauer, Gesine |
title |
Organic carbon accumulation in the South Atlantic Ocean |
title_short |
Organic carbon accumulation in the South Atlantic Ocean |
title_full |
Organic carbon accumulation in the South Atlantic Ocean |
title_fullStr |
Organic carbon accumulation in the South Atlantic Ocean |
title_full_unstemmed |
Organic carbon accumulation in the South Atlantic Ocean |
title_sort |
organic carbon accumulation in the south atlantic ocean |
publisher |
PANGAEA |
publishDate |
2004 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.735988 https://doi.org/10.1594/PANGAEA.735988 |
op_coverage |
MEDIAN LATITUDE: -24.023474 * MEDIAN LONGITUDE: -15.064098 * SOUTH-BOUND LATITUDE: -49.999300 * WEST-BOUND LONGITUDE: -59.733333 * NORTH-BOUND LATITUDE: 10.000000 * EAST-BOUND LONGITUDE: 19.760000 * DATE/TIME START: 1957-03-12T00:00:00 * DATE/TIME END: 2000-08-20T00:00:00 |
long_lat |
ENVELOPE(-59.733333,19.760000,10.000000,-49.999300) |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Supplement to: Mollenhauer, Gesine; Schneider, Ralph R; Jennerjahn, Tim C; Müller, Peter J; Wefer, Gerold (2004): Organic carbon accumulation in the South Atlantic Ocean: its modern, mid-Holocene and last glacial distribution. Global and Planetary Change, 40(3-4), 249-266, https://doi.org/10.1016/j.gloplacha.2003.08.002 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.735988 https://doi.org/10.1594/PANGAEA.735988 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.735988 https://doi.org/10.1016/j.gloplacha.2003.08.002 |
_version_ |
1766200563456802816 |