Mg/Ca values for planktonic foraminifera N. pachyderma and G. bulloides from ocean sediment core MD02-2496 on the Vancouver margin, Northeastern Pacific Ocean
A new, high-resolution planktonic foraminiferal Mg/Ca-based ocean temperature record has been generated for deep sea core MD02-2496, sited offshore of Vancouver Island, Western Canada during the last deglaciation (21-12 ka). The relationship between Cordilleran Ice Sheet (CIS) retreat and changing r...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.835607 2023-05-15T16:40:40+02:00 Mg/Ca values for planktonic foraminifera N. pachyderma and G. bulloides from ocean sediment core MD02-2496 on the Vancouver margin, Northeastern Pacific Ocean Taylor, Meghan A Hendy, Ingrid L Pak, Dorothy K LATITUDE: 48.974500 * LONGITUDE: -127.035700 * DATE/TIME START: 2002-06-01T13:48:00 * DATE/TIME END: 2002-06-01T13:48:00 2014-09-08 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.835607 https://doi.org/10.1594/PANGAEA.835607 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.835607 https://doi.org/10.1594/PANGAEA.835607 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Taylor, Meghan A; Hendy, Ingrid L; Pak, Dorothy K (2014): Deglacial ocean warming and marine margin retreat of the Cordilleran Ice Sheet in the North Pacific Ocean. Earth and Planetary Science Letters, 403, 89-98, https://doi.org/10.1016/j.epsl.2014.06.026 British Columbia Margin Giant piston corer GPC IMAGES VIII - MONA Marion Dufresne (1995) MD022496 MD02-2496 MD126 Dataset 2014 ftpangaea https://doi.org/10.1594/PANGAEA.835607 https://doi.org/10.1016/j.epsl.2014.06.026 2023-01-20T07:33:20Z A new, high-resolution planktonic foraminiferal Mg/Ca-based ocean temperature record has been generated for deep sea core MD02-2496, sited offshore of Vancouver Island, Western Canada during the last deglaciation (21-12 ka). The relationship between Cordilleran Ice Sheet (CIS) retreat and changing regional ocean temperatures has been reconstructed through glaciomarine sediments in MD02-2496 that capture tidewater glacier response to surface ocean thermal forcing. At CIS maximum extent, the marine margin of the ice sheet advanced onto the continental shelf. During this interval, ocean temperatures recorded by surface ocean dwelling Globigerina bulloides remained a relatively constant ~7.5°C while subsurface dwelling Neogloboquadrina pachyderma (s.) recorded temperatures of ~5°C. These ocean temperatures were sufficiently warm to induce significant melt along the tidewater ice terminus similar to modern Alaskan tidewater glacial systems. During the deglacial retreat of the CIS, the N. pachyderma temperature record shows two distinct warming steps of ~2 and 2.5°C between 17.2-16 and 15.5-14 ka respectively, coincident with ice rafting events from the CIS, while G. bulloides records an ~3°C warming from 15 to14 ka. We hypothesize that submarine melting resulting from relatively warm ocean temperatures was an important process driving ice removal from CIS tidewater glaciers during the initial stages of deglaciation. Dataset Ice Sheet Neogloboquadrina pachyderma Planktonic foraminifera Tidewater PANGAEA - Data Publisher for Earth & Environmental Science Canada Pacific British Columbia ENVELOPE(-125.003,-125.003,54.000,54.000) ENVELOPE(-127.035700,-127.035700,48.974500,48.974500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
British Columbia Margin Giant piston corer GPC IMAGES VIII - MONA Marion Dufresne (1995) MD022496 MD02-2496 MD126 |
spellingShingle |
British Columbia Margin Giant piston corer GPC IMAGES VIII - MONA Marion Dufresne (1995) MD022496 MD02-2496 MD126 Taylor, Meghan A Hendy, Ingrid L Pak, Dorothy K Mg/Ca values for planktonic foraminifera N. pachyderma and G. bulloides from ocean sediment core MD02-2496 on the Vancouver margin, Northeastern Pacific Ocean |
topic_facet |
British Columbia Margin Giant piston corer GPC IMAGES VIII - MONA Marion Dufresne (1995) MD022496 MD02-2496 MD126 |
description |
A new, high-resolution planktonic foraminiferal Mg/Ca-based ocean temperature record has been generated for deep sea core MD02-2496, sited offshore of Vancouver Island, Western Canada during the last deglaciation (21-12 ka). The relationship between Cordilleran Ice Sheet (CIS) retreat and changing regional ocean temperatures has been reconstructed through glaciomarine sediments in MD02-2496 that capture tidewater glacier response to surface ocean thermal forcing. At CIS maximum extent, the marine margin of the ice sheet advanced onto the continental shelf. During this interval, ocean temperatures recorded by surface ocean dwelling Globigerina bulloides remained a relatively constant ~7.5°C while subsurface dwelling Neogloboquadrina pachyderma (s.) recorded temperatures of ~5°C. These ocean temperatures were sufficiently warm to induce significant melt along the tidewater ice terminus similar to modern Alaskan tidewater glacial systems. During the deglacial retreat of the CIS, the N. pachyderma temperature record shows two distinct warming steps of ~2 and 2.5°C between 17.2-16 and 15.5-14 ka respectively, coincident with ice rafting events from the CIS, while G. bulloides records an ~3°C warming from 15 to14 ka. We hypothesize that submarine melting resulting from relatively warm ocean temperatures was an important process driving ice removal from CIS tidewater glaciers during the initial stages of deglaciation. |
format |
Dataset |
author |
Taylor, Meghan A Hendy, Ingrid L Pak, Dorothy K |
author_facet |
Taylor, Meghan A Hendy, Ingrid L Pak, Dorothy K |
author_sort |
Taylor, Meghan A |
title |
Mg/Ca values for planktonic foraminifera N. pachyderma and G. bulloides from ocean sediment core MD02-2496 on the Vancouver margin, Northeastern Pacific Ocean |
title_short |
Mg/Ca values for planktonic foraminifera N. pachyderma and G. bulloides from ocean sediment core MD02-2496 on the Vancouver margin, Northeastern Pacific Ocean |
title_full |
Mg/Ca values for planktonic foraminifera N. pachyderma and G. bulloides from ocean sediment core MD02-2496 on the Vancouver margin, Northeastern Pacific Ocean |
title_fullStr |
Mg/Ca values for planktonic foraminifera N. pachyderma and G. bulloides from ocean sediment core MD02-2496 on the Vancouver margin, Northeastern Pacific Ocean |
title_full_unstemmed |
Mg/Ca values for planktonic foraminifera N. pachyderma and G. bulloides from ocean sediment core MD02-2496 on the Vancouver margin, Northeastern Pacific Ocean |
title_sort |
mg/ca values for planktonic foraminifera n. pachyderma and g. bulloides from ocean sediment core md02-2496 on the vancouver margin, northeastern pacific ocean |
publisher |
PANGAEA |
publishDate |
2014 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.835607 https://doi.org/10.1594/PANGAEA.835607 |
op_coverage |
LATITUDE: 48.974500 * LONGITUDE: -127.035700 * DATE/TIME START: 2002-06-01T13:48:00 * DATE/TIME END: 2002-06-01T13:48:00 |
long_lat |
ENVELOPE(-125.003,-125.003,54.000,54.000) ENVELOPE(-127.035700,-127.035700,48.974500,48.974500) |
geographic |
Canada Pacific British Columbia |
geographic_facet |
Canada Pacific British Columbia |
genre |
Ice Sheet Neogloboquadrina pachyderma Planktonic foraminifera Tidewater |
genre_facet |
Ice Sheet Neogloboquadrina pachyderma Planktonic foraminifera Tidewater |
op_source |
Supplement to: Taylor, Meghan A; Hendy, Ingrid L; Pak, Dorothy K (2014): Deglacial ocean warming and marine margin retreat of the Cordilleran Ice Sheet in the North Pacific Ocean. Earth and Planetary Science Letters, 403, 89-98, https://doi.org/10.1016/j.epsl.2014.06.026 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.835607 https://doi.org/10.1594/PANGAEA.835607 |
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.835607 https://doi.org/10.1016/j.epsl.2014.06.026 |
_version_ |
1766031073415790592 |