Dynamic intermediate waters across the late glacial revealed by paired radiocarbon and clumped isotope temperature records
Paired radiocarbon and clumped isotope temperature records from U/Thâ€dated Desmophyllum dianthus corals in the North Atlantic and Southern Ocean provide unique information about the history of intermediate waters (∼1,500–1,700 m) across the late glacial and deglaciation (∼35–10 ka). These m...
Published in: | Paleoceanography and Paleoclimatology |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
American Geophysical Union
2019
|
Subjects: | |
Online Access: | https://doi.org/10.1029/2019pa003568 |
id |
ftcaltechauth:oai:authors.library.caltech.edu:mwpv2-fac37 |
---|---|
record_format |
openpolar |
spelling |
ftcaltechauth:oai:authors.library.caltech.edu:mwpv2-fac37 2024-09-15T18:20:43+00:00 Dynamic intermediate waters across the late glacial revealed by paired radiocarbon and clumped isotope temperature records Hines, Sophia K. V. Eiler, John M. Southon, John R. Adkins, Jess F. 2019-07 https://doi.org/10.1029/2019pa003568 unknown American Geophysical Union https://doi.org/10.1029/2019pa003568 oai:authors.library.caltech.edu:mwpv2-fac37 eprintid:95957 resolverid:CaltechAUTHORS:20190530-102320622 info:eu-repo/semantics/openAccess Other Paleoceanography and Paleoclimatology, 34(7), 1074-1091, (2019-07) Radiocarbon Clumped Isotope Temperature Ocean Circulation Intermediate Water info:eu-repo/semantics/article 2019 ftcaltechauth https://doi.org/10.1029/2019pa003568 2024-08-06T15:35:00Z Paired radiocarbon and clumped isotope temperature records from U/Thâ€dated Desmophyllum dianthus corals in the North Atlantic and Southern Ocean provide unique information about the history of intermediate waters (∼1,500–1,700 m) across the late glacial and deglaciation (∼35–10 ka). These measurements allow for the construction of radiocarbonâ€temperature crossplots, which help to identify water mass endmembers at different times across the deglaciation. Radiocarbon and temperature values from the late glacial fall outside the range of modern ocean data from near the sample collection sites. In the North Atlantic, radiocarbon values tend to be much older than the modern, while in the Southern Ocean, they are more often younger than the modern. Reconstructed temperatures vary around respective modern ocean values; however, warm waters are observed at the Last Glacial Maximum and across the deglaciation in the north and south. We interpret our data in the context of the modern hydrography of the Western North Atlantic and Southern Ocean, and we draw upon direct comparisons between sediment coreâ€derived reconstructions of ocean circulation from the South Indoâ€Pacific and our deepâ€sea coral data from the Southern Ocean. Our North Atlantic data support accepted patterns of reduced North Atlantic Deep Water formation during Heinrich Stadials 1 and 2. In the Southern Ocean, deepâ€sea coral populations respond to changes in ocean structure that are also reflected in a depth profile of δ¹³C data from New Zealand, and data indicate that there was less influence of Pacific Deep Water between 1,500 and 1,700 m south of Tasmania across much of the deglaciation. © 2019 American Geophysical Union. Received 18 JAN 2019; Accepted 24 MAY 2019; Accepted article online 29MAY 2019; Published online 10 JUL 2019. We would like to thank Andrew Thompson, Nivedita Thiagarajan, and Julia Gottschalk for helpful discussions. We also acknowledge constructive comments from two anonymous reviewers. S. K. V. H. received ... Article in Journal/Newspaper North Atlantic Deep Water North Atlantic Southern Ocean Caltech Authors (California Institute of Technology) Paleoceanography and Paleoclimatology 34 7 1074 1091 |
institution |
Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
unknown |
topic |
Radiocarbon Clumped Isotope Temperature Ocean Circulation Intermediate Water |
spellingShingle |
Radiocarbon Clumped Isotope Temperature Ocean Circulation Intermediate Water Hines, Sophia K. V. Eiler, John M. Southon, John R. Adkins, Jess F. Dynamic intermediate waters across the late glacial revealed by paired radiocarbon and clumped isotope temperature records |
topic_facet |
Radiocarbon Clumped Isotope Temperature Ocean Circulation Intermediate Water |
description |
Paired radiocarbon and clumped isotope temperature records from U/Thâ€dated Desmophyllum dianthus corals in the North Atlantic and Southern Ocean provide unique information about the history of intermediate waters (∼1,500–1,700 m) across the late glacial and deglaciation (∼35–10 ka). These measurements allow for the construction of radiocarbonâ€temperature crossplots, which help to identify water mass endmembers at different times across the deglaciation. Radiocarbon and temperature values from the late glacial fall outside the range of modern ocean data from near the sample collection sites. In the North Atlantic, radiocarbon values tend to be much older than the modern, while in the Southern Ocean, they are more often younger than the modern. Reconstructed temperatures vary around respective modern ocean values; however, warm waters are observed at the Last Glacial Maximum and across the deglaciation in the north and south. We interpret our data in the context of the modern hydrography of the Western North Atlantic and Southern Ocean, and we draw upon direct comparisons between sediment coreâ€derived reconstructions of ocean circulation from the South Indoâ€Pacific and our deepâ€sea coral data from the Southern Ocean. Our North Atlantic data support accepted patterns of reduced North Atlantic Deep Water formation during Heinrich Stadials 1 and 2. In the Southern Ocean, deepâ€sea coral populations respond to changes in ocean structure that are also reflected in a depth profile of δ¹³C data from New Zealand, and data indicate that there was less influence of Pacific Deep Water between 1,500 and 1,700 m south of Tasmania across much of the deglaciation. © 2019 American Geophysical Union. Received 18 JAN 2019; Accepted 24 MAY 2019; Accepted article online 29MAY 2019; Published online 10 JUL 2019. We would like to thank Andrew Thompson, Nivedita Thiagarajan, and Julia Gottschalk for helpful discussions. We also acknowledge constructive comments from two anonymous reviewers. S. K. V. H. received ... |
format |
Article in Journal/Newspaper |
author |
Hines, Sophia K. V. Eiler, John M. Southon, John R. Adkins, Jess F. |
author_facet |
Hines, Sophia K. V. Eiler, John M. Southon, John R. Adkins, Jess F. |
author_sort |
Hines, Sophia K. V. |
title |
Dynamic intermediate waters across the late glacial revealed by paired radiocarbon and clumped isotope temperature records |
title_short |
Dynamic intermediate waters across the late glacial revealed by paired radiocarbon and clumped isotope temperature records |
title_full |
Dynamic intermediate waters across the late glacial revealed by paired radiocarbon and clumped isotope temperature records |
title_fullStr |
Dynamic intermediate waters across the late glacial revealed by paired radiocarbon and clumped isotope temperature records |
title_full_unstemmed |
Dynamic intermediate waters across the late glacial revealed by paired radiocarbon and clumped isotope temperature records |
title_sort |
dynamic intermediate waters across the late glacial revealed by paired radiocarbon and clumped isotope temperature records |
publisher |
American Geophysical Union |
publishDate |
2019 |
url |
https://doi.org/10.1029/2019pa003568 |
genre |
North Atlantic Deep Water North Atlantic Southern Ocean |
genre_facet |
North Atlantic Deep Water North Atlantic Southern Ocean |
op_source |
Paleoceanography and Paleoclimatology, 34(7), 1074-1091, (2019-07) |
op_relation |
https://doi.org/10.1029/2019pa003568 oai:authors.library.caltech.edu:mwpv2-fac37 eprintid:95957 resolverid:CaltechAUTHORS:20190530-102320622 |
op_rights |
info:eu-repo/semantics/openAccess Other |
op_doi |
https://doi.org/10.1029/2019pa003568 |
container_title |
Paleoceanography and Paleoclimatology |
container_volume |
34 |
container_issue |
7 |
container_start_page |
1074 |
op_container_end_page |
1091 |
_version_ |
1810459112398389248 |