Stable oxygen isotope ratios of the planktonic foraminifera Globigerina bulloides of ODP Hole 117-723A in the Arabian Sea (Table 2)
Oxygen and carbon isotopic analyses have been performed on the tests of Globigerina bulloides and Pulleniatina obliquiloculata (planktonic foraminifera) and Uvigerina excellens (benthic foraminifer) to study the evolution of surface and bottom water hydrographic changes associated with summer monsoo...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.695217 2023-05-15T18:00:42+02:00 Stable oxygen isotope ratios of the planktonic foraminifera Globigerina bulloides of ODP Hole 117-723A in 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 2003-06-02 text/tab-separated-values, 43 data points https://doi.pangaea.de/10.1594/PANGAEA.695217 https://doi.org/10.1594/PANGAEA.695217 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.695217 https://doi.org/10.1594/PANGAEA.695217 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 (2003): Carbon and oxygen isotope time series records of planktonic and benthic foraminifera from the Arabian Sea: implications on upwelling processes. Palaeogeography, Palaeoclimatology, Palaeoecology, 202(1-2), 85-95, https://doi.org/10.1016/S0031-0182(03)00629-1 117-723A AGE Arabian Sea DEPTH sediment/rock DRILL Drilling/drill rig Globigerina bulloides δ18O Joides Resolution Leg117 Mass spectrometer Finnigan MAT 250 Ocean Drilling Program ODP Dataset 2003 ftpangaea https://doi.org/10.1594/PANGAEA.695217 https://doi.org/10.1016/S0031-0182(03)00629-1 2023-01-20T08:46:21Z Oxygen and carbon isotopic analyses have been performed on the tests of Globigerina bulloides and Pulleniatina obliquiloculata (planktonic foraminifera) and Uvigerina excellens (benthic foraminifer) to study the evolution of surface and bottom water hydrographic changes associated with summer monsoon upwelling process at the Oman Margin over the last 19 kyr. Globigerina bulloides, P. obliquiloculata and U. excellens show sharp depleted delta18O excursions around 9 ka, ascribed to the distribution of melt water flux of Termination IB in this region. A synchronous delta18O shift in surface, subsurface and bottom water-living foraminifera around 9 ka reveals a rapid transfer of the Termination IB signal through the vertical circulation of the Arabian Sea in response to peak monsoon intensity. A steep increase in delta13C values of U. excellens between 9 and 8 ka reveals advection of Red Sea intermediate water into the Arabian Sea during peak monsoon intensity. For the first time a drastic climatic shift at ~4 ka is noticed in the Arabian Sea as evidenced by the lowest delta18O values of both P. obliquiloculata (-1.10 ‰) and G. bulloides (-2.29 ‰). This points to reduced upwelling strength. Both planktonic foraminifer species delta18O records suggest the establishment of modern surface water conditions after 3 ka at the Oman Margin. 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 δ18O 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 δ18O Joides Resolution Leg117 Mass spectrometer Finnigan MAT 250 Ocean Drilling Program ODP Naidu, Pothuri Divakar Niitsuma, Nobuaki Stable oxygen isotope ratios of the planktonic foraminifera Globigerina bulloides of ODP Hole 117-723A in the Arabian Sea (Table 2) |
topic_facet |
117-723A AGE Arabian Sea DEPTH sediment/rock DRILL Drilling/drill rig Globigerina bulloides δ18O Joides Resolution Leg117 Mass spectrometer Finnigan MAT 250 Ocean Drilling Program ODP |
description |
Oxygen and carbon isotopic analyses have been performed on the tests of Globigerina bulloides and Pulleniatina obliquiloculata (planktonic foraminifera) and Uvigerina excellens (benthic foraminifer) to study the evolution of surface and bottom water hydrographic changes associated with summer monsoon upwelling process at the Oman Margin over the last 19 kyr. Globigerina bulloides, P. obliquiloculata and U. excellens show sharp depleted delta18O excursions around 9 ka, ascribed to the distribution of melt water flux of Termination IB in this region. A synchronous delta18O shift in surface, subsurface and bottom water-living foraminifera around 9 ka reveals a rapid transfer of the Termination IB signal through the vertical circulation of the Arabian Sea in response to peak monsoon intensity. A steep increase in delta13C values of U. excellens between 9 and 8 ka reveals advection of Red Sea intermediate water into the Arabian Sea during peak monsoon intensity. For the first time a drastic climatic shift at ~4 ka is noticed in the Arabian Sea as evidenced by the lowest delta18O values of both P. obliquiloculata (-1.10 ‰) and G. bulloides (-2.29 ‰). This points to reduced upwelling strength. Both planktonic foraminifer species delta18O records suggest the establishment of modern surface water conditions after 3 ka at the Oman Margin. |
format |
Dataset |
author |
Naidu, Pothuri Divakar Niitsuma, Nobuaki |
author_facet |
Naidu, Pothuri Divakar Niitsuma, Nobuaki |
author_sort |
Naidu, Pothuri Divakar |
title |
Stable oxygen isotope ratios of the planktonic foraminifera Globigerina bulloides of ODP Hole 117-723A in the Arabian Sea (Table 2) |
title_short |
Stable oxygen isotope ratios of the planktonic foraminifera Globigerina bulloides of ODP Hole 117-723A in the Arabian Sea (Table 2) |
title_full |
Stable oxygen isotope ratios of the planktonic foraminifera Globigerina bulloides of ODP Hole 117-723A in the Arabian Sea (Table 2) |
title_fullStr |
Stable oxygen isotope ratios of the planktonic foraminifera Globigerina bulloides of ODP Hole 117-723A in the Arabian Sea (Table 2) |
title_full_unstemmed |
Stable oxygen isotope ratios of the planktonic foraminifera Globigerina bulloides of ODP Hole 117-723A in the Arabian Sea (Table 2) |
title_sort |
stable oxygen isotope ratios of the planktonic foraminifera globigerina bulloides of odp hole 117-723a in the arabian sea (table 2) |
publisher |
PANGAEA |
publishDate |
2003 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.695217 https://doi.org/10.1594/PANGAEA.695217 |
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 (2003): Carbon and oxygen isotope time series records of planktonic and benthic foraminifera from the Arabian Sea: implications on upwelling processes. Palaeogeography, Palaeoclimatology, Palaeoecology, 202(1-2), 85-95, https://doi.org/10.1016/S0031-0182(03)00629-1 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.695217 https://doi.org/10.1594/PANGAEA.695217 |
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.695217 https://doi.org/10.1016/S0031-0182(03)00629-1 |
_version_ |
1766169894677643264 |