Stable carbon and oxygen isotope ratios of Cibicidoides wuellerstorfi, and CaCO3 and sand content of ODP Hole 165-999A
The Late Cenozoic closure of the seaway between the North andSouth American continents is thought to have caused extensive changes in ocean circulation and Northern Hemisphere climate (Keigwin, 1982, doi:10.1126/science.217.4557.350; Maier-Reiners et al., 1990, doi:10.1029/PA005i003p00349). But the...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.789866 2024-09-15T18:12:35+00:00 Stable carbon and oxygen isotope ratios of Cibicidoides wuellerstorfi, and CaCO3 and sand content of ODP Hole 165-999A Haug, Gerald H Tiedemann, Ralf LATITUDE: 12.744000 * LONGITUDE: -78.739300 * DATE/TIME START: 1996-01-10T19:30:00 * DATE/TIME END: 1996-01-14T23:15:00 * MINIMUM DEPTH, sediment/rock: 55.15 m * MAXIMUM DEPTH, sediment/rock: 159.85 m 1998 text/tab-separated-values, 8303 data points https://doi.pangaea.de/10.1594/PANGAEA.789866 https://doi.org/10.1594/PANGAEA.789866 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.789866 https://doi.org/10.1594/PANGAEA.789866 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Haug, Gerald H; Tiedemann, Ralf (1998): Effect of the formation of the Isthmus of Panama on Atlantic Ocean thermohaline circulation. Nature, 393, 673-676, https://doi.org/10.1038/31447 165-999A Accumulation rate sand > 63 µm AGE Calcium carbonate Caribbean Sea Cibicidoides wuellerstorfi δ13C δ18O DEPTH sediment/rock sediment revised DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Joides Resolution Leg165 Ocean Drilling Program ODP Sample code/label Sand dataset 1998 ftpangaea https://doi.org/10.1594/PANGAEA.78986610.1038/31447 2024-07-24T02:31:31Z The Late Cenozoic closure of the seaway between the North andSouth American continents is thought to have caused extensive changes in ocean circulation and Northern Hemisphere climate (Keigwin, 1982, doi:10.1126/science.217.4557.350; Maier-Reiners et al., 1990, doi:10.1029/PA005i003p00349). But the timing and consequences of the emergence of the Isthmus of Panama, which closed the seaway, remain controversial (Keigwin, 1982, doi:10.1126/science.217.4557.350; Maier-Reiners et al., 1990, doi:10.1029/PA005i003p00349; Duque-Caro, 1990, doi:10.1016/0031-0182(90)90178-A; Keller et al., 1989, doi:10.1016/0895-9811(89)90028-X; Collins et al., 1996, doi:10.1130/0091-7613(1996)024<0687:TLMPIS>2.3.CO;2). Here we present stable-isotope and carbonate sand-fraction records from Caribbean sediments which, when compared to Atlantic and Pacific palaeoceanographic records, indicate that the closure caused a marked reorganization of ocean circulation starting 4.6 million years ago. Shallowing of the seaway intensified the Gulf Stream and introduced warm and saline water masses to high northern latitudes. These changes strengthened deep-water formation in the Labrador Sea over the next million years - as indicated by an increased deep-water ventilation and carbonate preservation in the Caribbean Sea - and favoured early Pliocene warming of the Northern Hemisphere. The evaporative cooling of surface waters during North Atlantic Deep Water formation would have introduced moisture to the Northern Hemisphere. Although the pronounced intensification of Northern Hemisphere glaciation between 3.1 and 2.5 million years ago substantially lagged the full development of North Atlantic Deep Water formation, we propose that the increased atmospheric moisture content was a necessary precondition for ice-sheet growth, which was then triggered by the incremental changes in the Earth's orbital obliquity. Dataset Ice Sheet Labrador Sea North Atlantic Deep Water North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-78.739300,-78.739300,12.744000,12.744000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
165-999A Accumulation rate sand > 63 µm AGE Calcium carbonate Caribbean Sea Cibicidoides wuellerstorfi δ13C δ18O DEPTH sediment/rock sediment revised DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Joides Resolution Leg165 Ocean Drilling Program ODP Sample code/label Sand |
spellingShingle |
165-999A Accumulation rate sand > 63 µm AGE Calcium carbonate Caribbean Sea Cibicidoides wuellerstorfi δ13C δ18O DEPTH sediment/rock sediment revised DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Joides Resolution Leg165 Ocean Drilling Program ODP Sample code/label Sand Haug, Gerald H Tiedemann, Ralf Stable carbon and oxygen isotope ratios of Cibicidoides wuellerstorfi, and CaCO3 and sand content of ODP Hole 165-999A |
topic_facet |
165-999A Accumulation rate sand > 63 µm AGE Calcium carbonate Caribbean Sea Cibicidoides wuellerstorfi δ13C δ18O DEPTH sediment/rock sediment revised DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Joides Resolution Leg165 Ocean Drilling Program ODP Sample code/label Sand |
description |
The Late Cenozoic closure of the seaway between the North andSouth American continents is thought to have caused extensive changes in ocean circulation and Northern Hemisphere climate (Keigwin, 1982, doi:10.1126/science.217.4557.350; Maier-Reiners et al., 1990, doi:10.1029/PA005i003p00349). But the timing and consequences of the emergence of the Isthmus of Panama, which closed the seaway, remain controversial (Keigwin, 1982, doi:10.1126/science.217.4557.350; Maier-Reiners et al., 1990, doi:10.1029/PA005i003p00349; Duque-Caro, 1990, doi:10.1016/0031-0182(90)90178-A; Keller et al., 1989, doi:10.1016/0895-9811(89)90028-X; Collins et al., 1996, doi:10.1130/0091-7613(1996)024<0687:TLMPIS>2.3.CO;2). Here we present stable-isotope and carbonate sand-fraction records from Caribbean sediments which, when compared to Atlantic and Pacific palaeoceanographic records, indicate that the closure caused a marked reorganization of ocean circulation starting 4.6 million years ago. Shallowing of the seaway intensified the Gulf Stream and introduced warm and saline water masses to high northern latitudes. These changes strengthened deep-water formation in the Labrador Sea over the next million years - as indicated by an increased deep-water ventilation and carbonate preservation in the Caribbean Sea - and favoured early Pliocene warming of the Northern Hemisphere. The evaporative cooling of surface waters during North Atlantic Deep Water formation would have introduced moisture to the Northern Hemisphere. Although the pronounced intensification of Northern Hemisphere glaciation between 3.1 and 2.5 million years ago substantially lagged the full development of North Atlantic Deep Water formation, we propose that the increased atmospheric moisture content was a necessary precondition for ice-sheet growth, which was then triggered by the incremental changes in the Earth's orbital obliquity. |
format |
Dataset |
author |
Haug, Gerald H Tiedemann, Ralf |
author_facet |
Haug, Gerald H Tiedemann, Ralf |
author_sort |
Haug, Gerald H |
title |
Stable carbon and oxygen isotope ratios of Cibicidoides wuellerstorfi, and CaCO3 and sand content of ODP Hole 165-999A |
title_short |
Stable carbon and oxygen isotope ratios of Cibicidoides wuellerstorfi, and CaCO3 and sand content of ODP Hole 165-999A |
title_full |
Stable carbon and oxygen isotope ratios of Cibicidoides wuellerstorfi, and CaCO3 and sand content of ODP Hole 165-999A |
title_fullStr |
Stable carbon and oxygen isotope ratios of Cibicidoides wuellerstorfi, and CaCO3 and sand content of ODP Hole 165-999A |
title_full_unstemmed |
Stable carbon and oxygen isotope ratios of Cibicidoides wuellerstorfi, and CaCO3 and sand content of ODP Hole 165-999A |
title_sort |
stable carbon and oxygen isotope ratios of cibicidoides wuellerstorfi, and caco3 and sand content of odp hole 165-999a |
publisher |
PANGAEA |
publishDate |
1998 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.789866 https://doi.org/10.1594/PANGAEA.789866 |
op_coverage |
LATITUDE: 12.744000 * LONGITUDE: -78.739300 * DATE/TIME START: 1996-01-10T19:30:00 * DATE/TIME END: 1996-01-14T23:15:00 * MINIMUM DEPTH, sediment/rock: 55.15 m * MAXIMUM DEPTH, sediment/rock: 159.85 m |
long_lat |
ENVELOPE(-78.739300,-78.739300,12.744000,12.744000) |
genre |
Ice Sheet Labrador Sea North Atlantic Deep Water North Atlantic |
genre_facet |
Ice Sheet Labrador Sea North Atlantic Deep Water North Atlantic |
op_source |
Supplement to: Haug, Gerald H; Tiedemann, Ralf (1998): Effect of the formation of the Isthmus of Panama on Atlantic Ocean thermohaline circulation. Nature, 393, 673-676, https://doi.org/10.1038/31447 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.789866 https://doi.org/10.1594/PANGAEA.789866 |
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.78986610.1038/31447 |
_version_ |
1810450173449469952 |