Stable isotope and Cd/Ca ratios of Neogloboquadrina pachyderma in high-latitude sediments
Recent studies have stressed the role of high latitude nutrient levels and productivity in controlling the carbon isotopic composition of the deep sea and the CO2 content of the atmosphere. We undertook a study of the chemical composition of the polar planktonic foraminifer Neogloboquadrina pachyder...
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1989
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.735611 2024-09-15T18:19:31+00:00 Stable isotope and Cd/Ca ratios of Neogloboquadrina pachyderma in high-latitude sediments Keigwin, Lloyd D Boyle, Edward A MEDIAN LATITUDE: 27.406516 * MEDIAN LONGITUDE: -18.013778 * SOUTH-BOUND LATITUDE: -54.916667 * WEST-BOUND LONGITUDE: -53.900000 * NORTH-BOUND LATITUDE: 85.850000 * EAST-BOUND LONGITUDE: 164.648000 * DATE/TIME START: 1965-08-30T00:00:00 * DATE/TIME END: 1983-07-02T00:00:00 1989 application/zip, 9 datasets https://doi.pangaea.de/10.1594/PANGAEA.735611 https://doi.org/10.1594/PANGAEA.735611 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.735611 https://doi.org/10.1594/PANGAEA.735611 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Keigwin, Lloyd D; Boyle, Edward A (1989): Late Quaternary paleochemistry of high-latitude surface waters. Palaeogeography, Palaeoclimatology, Palaeoecology, 73(1-2), 85-106, https://doi.org/10.1016/0031-0182(89)90047-3 94-606_Site AT_II-107_19 AT_II-107_22 ATII_USA Atlantic Ocean Atlantis II (1963) CEPAG CH67-19 CH69-32 CH69-69 CH6X CH70-K11 CH72-101 CH72-104 CH73-110 CH73-136 CH73-139 CH73-139C CH77-07 CH7X CH8X CHN115-26PG CHN115-27PG CHN115-36PG CHN82-04 CHN82-15 CHN82-20 CHN83-20 COMPCORE Composite Core Core Fram-I FramI/7 FramII/4 GC GEOGAS Glomar Challenger Gravity corer Gravity corer (Kiel type) HU75-41 HU75-42 Ice drift station Jean Charcot K708-006 Keigwin_31-33 KN708-1 KN708-6 KN714-15 KNR54-16BC dataset publication series 1989 ftpangaea https://doi.org/10.1594/PANGAEA.73561110.1016/0031-0182(89)90047-3 2024-08-21T00:02:25Z Recent studies have stressed the role of high latitude nutrient levels and productivity in controlling the carbon isotopic composition of the deep sea and the CO2 content of the atmosphere. We undertook a study of the chemical composition of the polar planktonic foraminifer Neogloboquadrina pachyderma (s., sinistral coiling) from 30 late Holocene samples and 49 down core records from the high-latitude North and South Atlantic Oceans to evaluate the history of sea surface chemical change from glacial to interglacial time. Stable isotopic analysis of coretop samples from the Atlantic, Pacific and Southern Oceans shows no significant correlation between the delta13C of N. pachyderma and either delta13C or PO4 in seawater. Conversely, Cd/Ca ratios in planktonic foraminifera are consistent with the PO4 content of surface waters. The level of maximum glaciation (18,000 yr B.P.), identified by CLIMAP and delta18O, was chosen for mapping. Isopleths of delta18O on N. pachyderma (s.) in the North Atlantic reveal a pattern largely influenced by sea surface temperature (S.S.T.) and generally support the S.S.T. reconstruction of CLIMAP. Differences between the two suggest significantly lower salinity in North Atlantic surface waters at high latitudes than in lower latitudes. Down core delta13C records of N. pachyderma confirm that low delta13C values occurred in the northeast Atlantic during the latest glacial maximum (Labeyrie and Duplessy, 1985, doi:10.1016/0031-0182(85)90069-0). However, a map of delta13C for the 18,000 yr B.P. level for a much larger region in the North Atlantic shows that minimum N. pachyderma delta13C occurred in temperate waters. N. pachyderma delta13C decreased toward the southwest, reaching a minimum of -1 per mil at 37°N. Despite the variability seen in delta13C records of N. pachyderma, none of our cores show significant temporal variability in Cd/Ca. From the combined Cd/Ca and delta13C data we can see no evidence for an upwelling gyre in the eastern North Atlantic during the latest glacial ... Other/Unknown Material Neogloboquadrina pachyderma North Atlantic Northeast Atlantic Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-53.900000,164.648000,85.850000,-54.916667) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
94-606_Site AT_II-107_19 AT_II-107_22 ATII_USA Atlantic Ocean Atlantis II (1963) CEPAG CH67-19 CH69-32 CH69-69 CH6X CH70-K11 CH72-101 CH72-104 CH73-110 CH73-136 CH73-139 CH73-139C CH77-07 CH7X CH8X CHN115-26PG CHN115-27PG CHN115-36PG CHN82-04 CHN82-15 CHN82-20 CHN83-20 COMPCORE Composite Core Core Fram-I FramI/7 FramII/4 GC GEOGAS Glomar Challenger Gravity corer Gravity corer (Kiel type) HU75-41 HU75-42 Ice drift station Jean Charcot K708-006 Keigwin_31-33 KN708-1 KN708-6 KN714-15 KNR54-16BC |
spellingShingle |
94-606_Site AT_II-107_19 AT_II-107_22 ATII_USA Atlantic Ocean Atlantis II (1963) CEPAG CH67-19 CH69-32 CH69-69 CH6X CH70-K11 CH72-101 CH72-104 CH73-110 CH73-136 CH73-139 CH73-139C CH77-07 CH7X CH8X CHN115-26PG CHN115-27PG CHN115-36PG CHN82-04 CHN82-15 CHN82-20 CHN83-20 COMPCORE Composite Core Core Fram-I FramI/7 FramII/4 GC GEOGAS Glomar Challenger Gravity corer Gravity corer (Kiel type) HU75-41 HU75-42 Ice drift station Jean Charcot K708-006 Keigwin_31-33 KN708-1 KN708-6 KN714-15 KNR54-16BC Keigwin, Lloyd D Boyle, Edward A Stable isotope and Cd/Ca ratios of Neogloboquadrina pachyderma in high-latitude sediments |
topic_facet |
94-606_Site AT_II-107_19 AT_II-107_22 ATII_USA Atlantic Ocean Atlantis II (1963) CEPAG CH67-19 CH69-32 CH69-69 CH6X CH70-K11 CH72-101 CH72-104 CH73-110 CH73-136 CH73-139 CH73-139C CH77-07 CH7X CH8X CHN115-26PG CHN115-27PG CHN115-36PG CHN82-04 CHN82-15 CHN82-20 CHN83-20 COMPCORE Composite Core Core Fram-I FramI/7 FramII/4 GC GEOGAS Glomar Challenger Gravity corer Gravity corer (Kiel type) HU75-41 HU75-42 Ice drift station Jean Charcot K708-006 Keigwin_31-33 KN708-1 KN708-6 KN714-15 KNR54-16BC |
description |
Recent studies have stressed the role of high latitude nutrient levels and productivity in controlling the carbon isotopic composition of the deep sea and the CO2 content of the atmosphere. We undertook a study of the chemical composition of the polar planktonic foraminifer Neogloboquadrina pachyderma (s., sinistral coiling) from 30 late Holocene samples and 49 down core records from the high-latitude North and South Atlantic Oceans to evaluate the history of sea surface chemical change from glacial to interglacial time. Stable isotopic analysis of coretop samples from the Atlantic, Pacific and Southern Oceans shows no significant correlation between the delta13C of N. pachyderma and either delta13C or PO4 in seawater. Conversely, Cd/Ca ratios in planktonic foraminifera are consistent with the PO4 content of surface waters. The level of maximum glaciation (18,000 yr B.P.), identified by CLIMAP and delta18O, was chosen for mapping. Isopleths of delta18O on N. pachyderma (s.) in the North Atlantic reveal a pattern largely influenced by sea surface temperature (S.S.T.) and generally support the S.S.T. reconstruction of CLIMAP. Differences between the two suggest significantly lower salinity in North Atlantic surface waters at high latitudes than in lower latitudes. Down core delta13C records of N. pachyderma confirm that low delta13C values occurred in the northeast Atlantic during the latest glacial maximum (Labeyrie and Duplessy, 1985, doi:10.1016/0031-0182(85)90069-0). However, a map of delta13C for the 18,000 yr B.P. level for a much larger region in the North Atlantic shows that minimum N. pachyderma delta13C occurred in temperate waters. N. pachyderma delta13C decreased toward the southwest, reaching a minimum of -1 per mil at 37°N. Despite the variability seen in delta13C records of N. pachyderma, none of our cores show significant temporal variability in Cd/Ca. From the combined Cd/Ca and delta13C data we can see no evidence for an upwelling gyre in the eastern North Atlantic during the latest glacial ... |
format |
Other/Unknown Material |
author |
Keigwin, Lloyd D Boyle, Edward A |
author_facet |
Keigwin, Lloyd D Boyle, Edward A |
author_sort |
Keigwin, Lloyd D |
title |
Stable isotope and Cd/Ca ratios of Neogloboquadrina pachyderma in high-latitude sediments |
title_short |
Stable isotope and Cd/Ca ratios of Neogloboquadrina pachyderma in high-latitude sediments |
title_full |
Stable isotope and Cd/Ca ratios of Neogloboquadrina pachyderma in high-latitude sediments |
title_fullStr |
Stable isotope and Cd/Ca ratios of Neogloboquadrina pachyderma in high-latitude sediments |
title_full_unstemmed |
Stable isotope and Cd/Ca ratios of Neogloboquadrina pachyderma in high-latitude sediments |
title_sort |
stable isotope and cd/ca ratios of neogloboquadrina pachyderma in high-latitude sediments |
publisher |
PANGAEA |
publishDate |
1989 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.735611 https://doi.org/10.1594/PANGAEA.735611 |
op_coverage |
MEDIAN LATITUDE: 27.406516 * MEDIAN LONGITUDE: -18.013778 * SOUTH-BOUND LATITUDE: -54.916667 * WEST-BOUND LONGITUDE: -53.900000 * NORTH-BOUND LATITUDE: 85.850000 * EAST-BOUND LONGITUDE: 164.648000 * DATE/TIME START: 1965-08-30T00:00:00 * DATE/TIME END: 1983-07-02T00:00:00 |
long_lat |
ENVELOPE(-53.900000,164.648000,85.850000,-54.916667) |
genre |
Neogloboquadrina pachyderma North Atlantic Northeast Atlantic Planktonic foraminifera |
genre_facet |
Neogloboquadrina pachyderma North Atlantic Northeast Atlantic Planktonic foraminifera |
op_source |
Supplement to: Keigwin, Lloyd D; Boyle, Edward A (1989): Late Quaternary paleochemistry of high-latitude surface waters. Palaeogeography, Palaeoclimatology, Palaeoecology, 73(1-2), 85-106, https://doi.org/10.1016/0031-0182(89)90047-3 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.735611 https://doi.org/10.1594/PANGAEA.735611 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.73561110.1016/0031-0182(89)90047-3 |
_version_ |
1810457868592218112 |