Benthic foraminiferal fauna and isotope record in Holocene sediments of the northwest Indian Ocean, supplement to: Gupta, Anil K; Das, Moumita; Clemens, Steven C; Mukherjee, Baidehi (2008): Benthic foraminiferal faunal and isotopic changes as recorded in Holocene sediments of the northwest Indian Ocean. Paleoceanography, 23(2), PA2214
Historically, the Holocene has been considered an interval of relatively stable climate. However, recent studies from the northern Arabian Sea (Netherlands Indian Ocean Program 905) suggested high-amplitude climate shifts in the early and middle Holocene based on faunal and benthic isotopic proxy re...
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ftdatacite:10.1594/pangaea.832193 2023-05-15T17:25:27+02:00 Benthic foraminiferal fauna and isotope record in Holocene sediments of the northwest Indian Ocean, supplement to: Gupta, Anil K; Das, Moumita; Clemens, Steven C; Mukherjee, Baidehi (2008): Benthic foraminiferal faunal and isotopic changes as recorded in Holocene sediments of the northwest Indian Ocean. Paleoceanography, 23(2), PA2214 Gupta, Anil K Das, Moumita Clemens, Steven C Mukherjee, Baidehi 2008 application/zip https://dx.doi.org/10.1594/pangaea.832193 https://doi.pangaea.de/10.1594/PANGAEA.832193 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1029/2007pa001546 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Ocean Drilling Program ODP Supplementary Collection of Datasets Collection article 2008 ftdatacite https://doi.org/10.1594/pangaea.832193 https://doi.org/10.1029/2007pa001546 2022-02-08T16:02:21Z Historically, the Holocene has been considered an interval of relatively stable climate. However, recent studies from the northern Arabian Sea (Netherlands Indian Ocean Program 905) suggested high-amplitude climate shifts in the early and middle Holocene based on faunal and benthic isotopic proxy records. We examined benthic foraminiferal faunal and stable isotopic data from Ocean Drilling Program (ODP) Site 723 and total organic carbon data from ODP Site 724, Oman Margin (808 and 593 m water depths, respectively). At Site 723 the mid-Holocene shift in d18O values of infaunal benthic species Uvigerina peregrina (1.4 per mil) is 3 times larger than that of epifaunal benthic species Cibicides kullenbergi recorded at Site NIOP 905 off Somalia. However, none of the five other benthic species we measured at Hole 723A exhibits such a shift in d18O. We speculate that the late Holocene d18O decrease in U. peregrina represents species-specific changes in ecological habitat or food preference in response to changes in surface and deep ocean circulation. While the stable isotopic data do not appear to indicate a middle Holocene climatic shift, our total organic carbon and benthic faunal assemblage data do indicate that the early Holocene deep Arabian Sea was influenced by increased ventilation perhaps by North Atlantic Deep Water and/or Circumpolar Deep Water incursions into the Indian Ocean, leading to remineralization of organic matter and a relatively weak early Holocene oxygen minimum zone in the northwest Arabian Sea in spite of strong summer monsoon circulation. Article in Journal/Newspaper North Atlantic Deep Water North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Indian |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Ocean Drilling Program ODP |
spellingShingle |
Ocean Drilling Program ODP Gupta, Anil K Das, Moumita Clemens, Steven C Mukherjee, Baidehi Benthic foraminiferal fauna and isotope record in Holocene sediments of the northwest Indian Ocean, supplement to: Gupta, Anil K; Das, Moumita; Clemens, Steven C; Mukherjee, Baidehi (2008): Benthic foraminiferal faunal and isotopic changes as recorded in Holocene sediments of the northwest Indian Ocean. Paleoceanography, 23(2), PA2214 |
topic_facet |
Ocean Drilling Program ODP |
description |
Historically, the Holocene has been considered an interval of relatively stable climate. However, recent studies from the northern Arabian Sea (Netherlands Indian Ocean Program 905) suggested high-amplitude climate shifts in the early and middle Holocene based on faunal and benthic isotopic proxy records. We examined benthic foraminiferal faunal and stable isotopic data from Ocean Drilling Program (ODP) Site 723 and total organic carbon data from ODP Site 724, Oman Margin (808 and 593 m water depths, respectively). At Site 723 the mid-Holocene shift in d18O values of infaunal benthic species Uvigerina peregrina (1.4 per mil) is 3 times larger than that of epifaunal benthic species Cibicides kullenbergi recorded at Site NIOP 905 off Somalia. However, none of the five other benthic species we measured at Hole 723A exhibits such a shift in d18O. We speculate that the late Holocene d18O decrease in U. peregrina represents species-specific changes in ecological habitat or food preference in response to changes in surface and deep ocean circulation. While the stable isotopic data do not appear to indicate a middle Holocene climatic shift, our total organic carbon and benthic faunal assemblage data do indicate that the early Holocene deep Arabian Sea was influenced by increased ventilation perhaps by North Atlantic Deep Water and/or Circumpolar Deep Water incursions into the Indian Ocean, leading to remineralization of organic matter and a relatively weak early Holocene oxygen minimum zone in the northwest Arabian Sea in spite of strong summer monsoon circulation. |
format |
Article in Journal/Newspaper |
author |
Gupta, Anil K Das, Moumita Clemens, Steven C Mukherjee, Baidehi |
author_facet |
Gupta, Anil K Das, Moumita Clemens, Steven C Mukherjee, Baidehi |
author_sort |
Gupta, Anil K |
title |
Benthic foraminiferal fauna and isotope record in Holocene sediments of the northwest Indian Ocean, supplement to: Gupta, Anil K; Das, Moumita; Clemens, Steven C; Mukherjee, Baidehi (2008): Benthic foraminiferal faunal and isotopic changes as recorded in Holocene sediments of the northwest Indian Ocean. Paleoceanography, 23(2), PA2214 |
title_short |
Benthic foraminiferal fauna and isotope record in Holocene sediments of the northwest Indian Ocean, supplement to: Gupta, Anil K; Das, Moumita; Clemens, Steven C; Mukherjee, Baidehi (2008): Benthic foraminiferal faunal and isotopic changes as recorded in Holocene sediments of the northwest Indian Ocean. Paleoceanography, 23(2), PA2214 |
title_full |
Benthic foraminiferal fauna and isotope record in Holocene sediments of the northwest Indian Ocean, supplement to: Gupta, Anil K; Das, Moumita; Clemens, Steven C; Mukherjee, Baidehi (2008): Benthic foraminiferal faunal and isotopic changes as recorded in Holocene sediments of the northwest Indian Ocean. Paleoceanography, 23(2), PA2214 |
title_fullStr |
Benthic foraminiferal fauna and isotope record in Holocene sediments of the northwest Indian Ocean, supplement to: Gupta, Anil K; Das, Moumita; Clemens, Steven C; Mukherjee, Baidehi (2008): Benthic foraminiferal faunal and isotopic changes as recorded in Holocene sediments of the northwest Indian Ocean. Paleoceanography, 23(2), PA2214 |
title_full_unstemmed |
Benthic foraminiferal fauna and isotope record in Holocene sediments of the northwest Indian Ocean, supplement to: Gupta, Anil K; Das, Moumita; Clemens, Steven C; Mukherjee, Baidehi (2008): Benthic foraminiferal faunal and isotopic changes as recorded in Holocene sediments of the northwest Indian Ocean. Paleoceanography, 23(2), PA2214 |
title_sort |
benthic foraminiferal fauna and isotope record in holocene sediments of the northwest indian ocean, supplement to: gupta, anil k; das, moumita; clemens, steven c; mukherjee, baidehi (2008): benthic foraminiferal faunal and isotopic changes as recorded in holocene sediments of the northwest indian ocean. paleoceanography, 23(2), pa2214 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2008 |
url |
https://dx.doi.org/10.1594/pangaea.832193 https://doi.pangaea.de/10.1594/PANGAEA.832193 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
North Atlantic Deep Water North Atlantic |
genre_facet |
North Atlantic Deep Water North Atlantic |
op_relation |
https://dx.doi.org/10.1029/2007pa001546 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.832193 https://doi.org/10.1029/2007pa001546 |
_version_ |
1766116880151478272 |