Diatom, ice rafted debris and Neogloboquadrina pachyderma (sinistral) abundance in sediment core OCE326-GGC14
A high-resolution diatom census coupled with other proxy data from Laurentian Fan (LF) provides a detailed description of the last deglaciation, bringing new insight to that period by revealing directly the timing of sea-ice formation and melting. Cold events Heinrich Event 1 (H1) and the Younger Dr...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.854452 2024-06-23T07:53:23+00:00 Diatom, ice rafted debris and Neogloboquadrina pachyderma (sinistral) abundance in sediment core OCE326-GGC14 Gil, Isabelle M Keigwin, Lloyd D Abrantes, Fatima F LATITUDE: 43.065980 * LONGITUDE: -55.833200 * DATE/TIME START: 1998-07-06T00:00:00 * DATE/TIME END: 1998-07-06T00:00:00 2015 application/zip, 6 datasets https://doi.pangaea.de/10.1594/PANGAEA.854452 https://doi.org/10.1594/PANGAEA.854452 en eng PANGAEA Gil, Isabelle M; Keigwin, Lloyd D; Abrantes, Fatima F (2015): The deglaciation over Laurentian Fan: History of diatoms, IRD, ice and fresh water. Quaternary Science Reviews, 129, 57-67, https://doi.org/10.1016/j.quascirev.2015.10.006 Gil, Isabelle M; Keigwin, Lloyd D; Abrantes, Fatima F (2016): Reply to comment received from A. E. Carlson et al. regarding “The deglaciation over Laurentian Fan: History of diatoms, IRD, ice and fresh water” by Gil et al. (2015), Quaternary Science Reviews 129, 57–67. Quaternary Science Reviews, 139, 166-169, https://doi.org/10.1016/j.quascirev.2016.03.001 https://doi.pangaea.de/10.1594/PANGAEA.854452 https://doi.org/10.1594/PANGAEA.854452 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess GGC Giant gravity corer North Atlantic OCE326-GGC14 Dataset 2015 ftpangaea https://doi.org/10.1594/PANGAEA.85445210.1016/j.quascirev.2015.10.00610.1016/j.quascirev.2016.03.001 2024-06-12T14:17:12Z A high-resolution diatom census coupled with other proxy data from Laurentian Fan (LF) provides a detailed description of the last deglaciation, bringing new insight to that period by revealing directly the timing of sea-ice formation and melting. Cold events Heinrich Event 1 (H1) and the Younger Dryas (YD) were multiphase events. H1 (~16.8-15.7 cal kyr BP) was defined by a two-pulse release of icebergs promoting sea-ice formation. Melting of sea-ice after H1 corresponds to a cold and fresh anomaly that may have kept the Bølling colder than the Allerød. At ~13.6 cal kyr BP, a cooling trend culminated with sea-ice formation, marking the YD onset (~12.8 cal kyr BP). The decrease in sea-ice (~12.2 cal kyr BP) led to a YD second phase characterized by very cold winters. However, the contribution of warm water diatoms tends to increase at the same time and the YD gradual end (~11.6 cal kyr BP) contrasts with its abrupt end in Greenland ice cores. The YD cannot be regarded as an event triggered by a fresh water input through the Laurentian Channel since only one weak brief input nearly 1000 yrs after its onset is recorded. Very cold and cool conditions without ice mark the following Preboreal. A northward heat flux between 10.8 and 10.2 cal kyr BP was interrupted by the increased influence of coastal waters likely fed by inland melting. There was no further development of sea-ice or ice-drift then. Dataset Greenland Greenland ice cores Neogloboquadrina pachyderma North Atlantic Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Greenland ENVELOPE(-55.833200,-55.833200,43.065980,43.065980) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
GGC Giant gravity corer North Atlantic OCE326-GGC14 |
spellingShingle |
GGC Giant gravity corer North Atlantic OCE326-GGC14 Gil, Isabelle M Keigwin, Lloyd D Abrantes, Fatima F Diatom, ice rafted debris and Neogloboquadrina pachyderma (sinistral) abundance in sediment core OCE326-GGC14 |
topic_facet |
GGC Giant gravity corer North Atlantic OCE326-GGC14 |
description |
A high-resolution diatom census coupled with other proxy data from Laurentian Fan (LF) provides a detailed description of the last deglaciation, bringing new insight to that period by revealing directly the timing of sea-ice formation and melting. Cold events Heinrich Event 1 (H1) and the Younger Dryas (YD) were multiphase events. H1 (~16.8-15.7 cal kyr BP) was defined by a two-pulse release of icebergs promoting sea-ice formation. Melting of sea-ice after H1 corresponds to a cold and fresh anomaly that may have kept the Bølling colder than the Allerød. At ~13.6 cal kyr BP, a cooling trend culminated with sea-ice formation, marking the YD onset (~12.8 cal kyr BP). The decrease in sea-ice (~12.2 cal kyr BP) led to a YD second phase characterized by very cold winters. However, the contribution of warm water diatoms tends to increase at the same time and the YD gradual end (~11.6 cal kyr BP) contrasts with its abrupt end in Greenland ice cores. The YD cannot be regarded as an event triggered by a fresh water input through the Laurentian Channel since only one weak brief input nearly 1000 yrs after its onset is recorded. Very cold and cool conditions without ice mark the following Preboreal. A northward heat flux between 10.8 and 10.2 cal kyr BP was interrupted by the increased influence of coastal waters likely fed by inland melting. There was no further development of sea-ice or ice-drift then. |
format |
Dataset |
author |
Gil, Isabelle M Keigwin, Lloyd D Abrantes, Fatima F |
author_facet |
Gil, Isabelle M Keigwin, Lloyd D Abrantes, Fatima F |
author_sort |
Gil, Isabelle M |
title |
Diatom, ice rafted debris and Neogloboquadrina pachyderma (sinistral) abundance in sediment core OCE326-GGC14 |
title_short |
Diatom, ice rafted debris and Neogloboquadrina pachyderma (sinistral) abundance in sediment core OCE326-GGC14 |
title_full |
Diatom, ice rafted debris and Neogloboquadrina pachyderma (sinistral) abundance in sediment core OCE326-GGC14 |
title_fullStr |
Diatom, ice rafted debris and Neogloboquadrina pachyderma (sinistral) abundance in sediment core OCE326-GGC14 |
title_full_unstemmed |
Diatom, ice rafted debris and Neogloboquadrina pachyderma (sinistral) abundance in sediment core OCE326-GGC14 |
title_sort |
diatom, ice rafted debris and neogloboquadrina pachyderma (sinistral) abundance in sediment core oce326-ggc14 |
publisher |
PANGAEA |
publishDate |
2015 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.854452 https://doi.org/10.1594/PANGAEA.854452 |
op_coverage |
LATITUDE: 43.065980 * LONGITUDE: -55.833200 * DATE/TIME START: 1998-07-06T00:00:00 * DATE/TIME END: 1998-07-06T00:00:00 |
long_lat |
ENVELOPE(-55.833200,-55.833200,43.065980,43.065980) |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice cores Neogloboquadrina pachyderma North Atlantic Sea ice |
genre_facet |
Greenland Greenland ice cores Neogloboquadrina pachyderma North Atlantic Sea ice |
op_relation |
Gil, Isabelle M; Keigwin, Lloyd D; Abrantes, Fatima F (2015): The deglaciation over Laurentian Fan: History of diatoms, IRD, ice and fresh water. Quaternary Science Reviews, 129, 57-67, https://doi.org/10.1016/j.quascirev.2015.10.006 Gil, Isabelle M; Keigwin, Lloyd D; Abrantes, Fatima F (2016): Reply to comment received from A. E. Carlson et al. regarding “The deglaciation over Laurentian Fan: History of diatoms, IRD, ice and fresh water” by Gil et al. (2015), Quaternary Science Reviews 129, 57–67. Quaternary Science Reviews, 139, 166-169, https://doi.org/10.1016/j.quascirev.2016.03.001 https://doi.pangaea.de/10.1594/PANGAEA.854452 https://doi.org/10.1594/PANGAEA.854452 |
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.85445210.1016/j.quascirev.2015.10.00610.1016/j.quascirev.2016.03.001 |
_version_ |
1802644998570639360 |