Nd-isotope ratios of Cretaceous sediment samples
The role that meridional overturning circulation (MOC) patterns played in poleward heat transport during the extreme warmth of the Early to Late Cretaceous is a fundamental and unresolved question in climate dynamics. In order to address this question we must determine where deep waters formed, and...
Main Authors: | , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
2012
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.817396 https://doi.org/10.1594/PANGAEA.817396 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.817396 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.817396 2023-05-15T18:25:38+02:00 Nd-isotope ratios of Cretaceous sediment samples Murphy, Daniel P Thomas, Deborah J MEDIAN LATITUDE: -8.381240 * MEDIAN LONGITUDE: 118.060989 * SOUTH-BOUND LATITUDE: -53.551750 * WEST-BOUND LONGITUDE: 75.974880 * NORTH-BOUND LATITUDE: 36.127160 * EAST-BOUND LONGITUDE: 158.201580 * DATE/TIME START: 1988-08-06T07:30:00 * DATE/TIME END: 2001-10-09T19:00:00 2012-07-31 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.817396 https://doi.org/10.1594/PANGAEA.817396 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.817396 https://doi.org/10.1594/PANGAEA.817396 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Murphy, Daniel P; Thomas, Deborah J (2012): Cretaceous deep-water formation in the Indian sector of the Southern Ocean. Paleoceanography, 27(1), PA1211, https://doi.org/10.1029/2011PA002198 Ocean Drilling Program ODP Dataset 2012 ftpangaea https://doi.org/10.1594/PANGAEA.817396 https://doi.org/10.1029/2011PA002198 2023-01-20T07:33:05Z The role that meridional overturning circulation (MOC) patterns played in poleward heat transport during the extreme warmth of the Early to Late Cretaceous is a fundamental and unresolved question in climate dynamics. In order to address this question we must determine where deep waters formed, and how they may have circulated during periods of extreme warmth. Here we present late Albian through Maastrichtian (105 to 65 Ma) Nd isotope records from Deep Sea Drilling Project (DSDP) and Ocean Drilling Program (ODP) sites in the proto-Indian Ocean and the tropical Pacific. Comparison of these data with previously published records indicates deep-water formation in the Indian sector of the Southern Ocean began at least ∼105 Ma, extending the record of high-latitude convection back into the Early Cretaceous prior to the peak warmth of the mid-Cretaceous. The growing body of data supports a mode of MOC in part characterized by high-latitude downwelling during the peak of greenhouse warmth of the Mesozoic and Cenozoic. However, this mode of MOC likely was characterized by numerous locations of deep convection that were regionally important, but not significant in terms of a globally overturning circulation due to paleogeographic and bathymetric barriers. Dataset Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Indian Pacific Southern Ocean ENVELOPE(75.974880,158.201580,36.127160,-53.551750) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Ocean Drilling Program ODP |
spellingShingle |
Ocean Drilling Program ODP Murphy, Daniel P Thomas, Deborah J Nd-isotope ratios of Cretaceous sediment samples |
topic_facet |
Ocean Drilling Program ODP |
description |
The role that meridional overturning circulation (MOC) patterns played in poleward heat transport during the extreme warmth of the Early to Late Cretaceous is a fundamental and unresolved question in climate dynamics. In order to address this question we must determine where deep waters formed, and how they may have circulated during periods of extreme warmth. Here we present late Albian through Maastrichtian (105 to 65 Ma) Nd isotope records from Deep Sea Drilling Project (DSDP) and Ocean Drilling Program (ODP) sites in the proto-Indian Ocean and the tropical Pacific. Comparison of these data with previously published records indicates deep-water formation in the Indian sector of the Southern Ocean began at least ∼105 Ma, extending the record of high-latitude convection back into the Early Cretaceous prior to the peak warmth of the mid-Cretaceous. The growing body of data supports a mode of MOC in part characterized by high-latitude downwelling during the peak of greenhouse warmth of the Mesozoic and Cenozoic. However, this mode of MOC likely was characterized by numerous locations of deep convection that were regionally important, but not significant in terms of a globally overturning circulation due to paleogeographic and bathymetric barriers. |
format |
Dataset |
author |
Murphy, Daniel P Thomas, Deborah J |
author_facet |
Murphy, Daniel P Thomas, Deborah J |
author_sort |
Murphy, Daniel P |
title |
Nd-isotope ratios of Cretaceous sediment samples |
title_short |
Nd-isotope ratios of Cretaceous sediment samples |
title_full |
Nd-isotope ratios of Cretaceous sediment samples |
title_fullStr |
Nd-isotope ratios of Cretaceous sediment samples |
title_full_unstemmed |
Nd-isotope ratios of Cretaceous sediment samples |
title_sort |
nd-isotope ratios of cretaceous sediment samples |
publisher |
PANGAEA |
publishDate |
2012 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.817396 https://doi.org/10.1594/PANGAEA.817396 |
op_coverage |
MEDIAN LATITUDE: -8.381240 * MEDIAN LONGITUDE: 118.060989 * SOUTH-BOUND LATITUDE: -53.551750 * WEST-BOUND LONGITUDE: 75.974880 * NORTH-BOUND LATITUDE: 36.127160 * EAST-BOUND LONGITUDE: 158.201580 * DATE/TIME START: 1988-08-06T07:30:00 * DATE/TIME END: 2001-10-09T19:00:00 |
long_lat |
ENVELOPE(75.974880,158.201580,36.127160,-53.551750) |
geographic |
Indian Pacific Southern Ocean |
geographic_facet |
Indian Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Supplement to: Murphy, Daniel P; Thomas, Deborah J (2012): Cretaceous deep-water formation in the Indian sector of the Southern Ocean. Paleoceanography, 27(1), PA1211, https://doi.org/10.1029/2011PA002198 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.817396 https://doi.org/10.1594/PANGAEA.817396 |
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.817396 https://doi.org/10.1029/2011PA002198 |
_version_ |
1766207222731243520 |