Stable carbon isotope ratios of the planktonic foraminifera Globigerina bulloides in ODP Hole 117-723A from the Arabian Sea (Table 2)
Production of Globigerina bulloides generally increases during upwelling in the tropical ocean and, in particular, during southwest monsoon season in the Arabian Sea. We studied the d13C signatures of G. bulloides from Ocean Drilling Program (ODP) site 723A located in the intense upwelling area alon...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.678266 2023-05-15T18:01:03+02:00 Stable carbon isotope ratios of the planktonic foraminifera Globigerina bulloides in ODP Hole 117-723A from the Arabian Sea (Table 2) Naidu, Pothuri Divakar Niitsuma, Nobuaki LATITUDE: 18.051800 * LONGITUDE: 57.609000 * DATE/TIME START: 1987-09-15T11:45:00 * DATE/TIME END: 1987-09-17T04:30:00 * MINIMUM DEPTH, sediment/rock: 0.03 m * MAXIMUM DEPTH, sediment/rock: 7.40 m 2004-06-02 text/tab-separated-values, 43 data points https://doi.pangaea.de/10.1594/PANGAEA.678266 https://doi.org/10.1594/PANGAEA.678266 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.678266 https://doi.org/10.1594/PANGAEA.678266 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Naidu, Pothuri Divakar; Niitsuma, Nobuaki (2004): Atypical d13C signature in Globigerina bulloides at the ODP Site 723A (Arabian Sea): implications of environmental changes caused by upwelling. Marine Micropaleontology, 53(1-2), 1-10, https://doi.org/10.1016/j.marmicro.2004.01.005 117-723A AGE Arabian Sea DEPTH sediment/rock DRILL Drilling/drill rig Globigerina bulloides δ13C Joides Resolution Leg117 Mass spectrometer Finnigan MAT 250 Ocean Drilling Program ODP Dataset 2004 ftpangaea https://doi.org/10.1594/PANGAEA.678266 https://doi.org/10.1016/j.marmicro.2004.01.005 2023-01-20T08:44:16Z Production of Globigerina bulloides generally increases during upwelling in the tropical ocean and, in particular, during southwest monsoon season in the Arabian Sea. We studied the d13C signatures of G. bulloides from Ocean Drilling Program (ODP) site 723A located in the intense upwelling area along the Oman Margin, Arabian Sea. The delta13C signature of G. bulloides from the Oman Margin during the last 19 ka ranges from -2.65‰ to -1.13‰. Strikingly, the delta13C values of G. bulloides are about 1‰ lower than that of benthic foraminifera Uvigerina excellens at this site. Apparently, the vital effects induced carbon isotopic fractionation in G. bulloides results in abnormal delta13C values. During upwelling seasons, G. bulloides calcifies faster, perhaps because of high-nutrient availability. Faster calcification rates in this species require higher respiration, which involves more respired CO2 enriched with 12C accounting for nearly 10% of shell carbon. Therefore, the combination the foraminifera of faster calcification and involvement of respired CO2 would induce more negative delta13C in G. bulloides compared to other foraminifera. Apart from vital effects, the environmental changes caused by the variations of upwelling intensity during Holocene and last glacial maximum also affected the down-core delta13C record of G. bulloides in the Arabian Sea. Significant ontogenic differences in both delta18O and delta13C occurred between large and small size classes of G. bulloides. Dataset Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(57.609000,57.609000,18.051800,18.051800) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
117-723A AGE Arabian Sea DEPTH sediment/rock DRILL Drilling/drill rig Globigerina bulloides δ13C Joides Resolution Leg117 Mass spectrometer Finnigan MAT 250 Ocean Drilling Program ODP |
spellingShingle |
117-723A AGE Arabian Sea DEPTH sediment/rock DRILL Drilling/drill rig Globigerina bulloides δ13C Joides Resolution Leg117 Mass spectrometer Finnigan MAT 250 Ocean Drilling Program ODP Naidu, Pothuri Divakar Niitsuma, Nobuaki Stable carbon isotope ratios of the planktonic foraminifera Globigerina bulloides in ODP Hole 117-723A from the Arabian Sea (Table 2) |
topic_facet |
117-723A AGE Arabian Sea DEPTH sediment/rock DRILL Drilling/drill rig Globigerina bulloides δ13C Joides Resolution Leg117 Mass spectrometer Finnigan MAT 250 Ocean Drilling Program ODP |
description |
Production of Globigerina bulloides generally increases during upwelling in the tropical ocean and, in particular, during southwest monsoon season in the Arabian Sea. We studied the d13C signatures of G. bulloides from Ocean Drilling Program (ODP) site 723A located in the intense upwelling area along the Oman Margin, Arabian Sea. The delta13C signature of G. bulloides from the Oman Margin during the last 19 ka ranges from -2.65‰ to -1.13‰. Strikingly, the delta13C values of G. bulloides are about 1‰ lower than that of benthic foraminifera Uvigerina excellens at this site. Apparently, the vital effects induced carbon isotopic fractionation in G. bulloides results in abnormal delta13C values. During upwelling seasons, G. bulloides calcifies faster, perhaps because of high-nutrient availability. Faster calcification rates in this species require higher respiration, which involves more respired CO2 enriched with 12C accounting for nearly 10% of shell carbon. Therefore, the combination the foraminifera of faster calcification and involvement of respired CO2 would induce more negative delta13C in G. bulloides compared to other foraminifera. Apart from vital effects, the environmental changes caused by the variations of upwelling intensity during Holocene and last glacial maximum also affected the down-core delta13C record of G. bulloides in the Arabian Sea. Significant ontogenic differences in both delta18O and delta13C occurred between large and small size classes of G. bulloides. |
format |
Dataset |
author |
Naidu, Pothuri Divakar Niitsuma, Nobuaki |
author_facet |
Naidu, Pothuri Divakar Niitsuma, Nobuaki |
author_sort |
Naidu, Pothuri Divakar |
title |
Stable carbon isotope ratios of the planktonic foraminifera Globigerina bulloides in ODP Hole 117-723A from the Arabian Sea (Table 2) |
title_short |
Stable carbon isotope ratios of the planktonic foraminifera Globigerina bulloides in ODP Hole 117-723A from the Arabian Sea (Table 2) |
title_full |
Stable carbon isotope ratios of the planktonic foraminifera Globigerina bulloides in ODP Hole 117-723A from the Arabian Sea (Table 2) |
title_fullStr |
Stable carbon isotope ratios of the planktonic foraminifera Globigerina bulloides in ODP Hole 117-723A from the Arabian Sea (Table 2) |
title_full_unstemmed |
Stable carbon isotope ratios of the planktonic foraminifera Globigerina bulloides in ODP Hole 117-723A from the Arabian Sea (Table 2) |
title_sort |
stable carbon isotope ratios of the planktonic foraminifera globigerina bulloides in odp hole 117-723a from the arabian sea (table 2) |
publisher |
PANGAEA |
publishDate |
2004 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.678266 https://doi.org/10.1594/PANGAEA.678266 |
op_coverage |
LATITUDE: 18.051800 * LONGITUDE: 57.609000 * DATE/TIME START: 1987-09-15T11:45:00 * DATE/TIME END: 1987-09-17T04:30:00 * MINIMUM DEPTH, sediment/rock: 0.03 m * MAXIMUM DEPTH, sediment/rock: 7.40 m |
long_lat |
ENVELOPE(57.609000,57.609000,18.051800,18.051800) |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Supplement to: Naidu, Pothuri Divakar; Niitsuma, Nobuaki (2004): Atypical d13C signature in Globigerina bulloides at the ODP Site 723A (Arabian Sea): implications of environmental changes caused by upwelling. Marine Micropaleontology, 53(1-2), 1-10, https://doi.org/10.1016/j.marmicro.2004.01.005 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.678266 https://doi.org/10.1594/PANGAEA.678266 |
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.678266 https://doi.org/10.1016/j.marmicro.2004.01.005 |
_version_ |
1766170370758410240 |