Organic geochemical parameters (biomarker) in sedimentary sequences and sediment traps
For the reconstruction of sea-ice variability, a biomarker approach which is based on (1) the determination of sea-ice diatom-specific highly-branched isoprenoid (IP25) and (2) the coupling of phytoplankton biomarkers and IP25 has been used. For the first time, such a data set was obtained from an a...
Main Authors: | , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
2012
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.775891 https://doi.org/10.1594/PANGAEA.775891 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.775891 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.775891 2023-05-15T14:25:42+02:00 Organic geochemical parameters (biomarker) in sedimentary sequences and sediment traps Fahl, Kirsten Stein, Ruediger MEDIAN LATITUDE: 79.619133 * MEDIAN LONGITUDE: 136.159167 * SOUTH-BOUND LATITUDE: 78.166667 * WEST-BOUND LONGITUDE: 133.398333 * NORTH-BOUND LATITUDE: 81.071600 * EAST-BOUND LONGITUDE: 138.920000 * DATE/TIME START: 1993-09-05T00:00:00 * DATE/TIME END: 1996-12-14T00:00:00 2012-02-13 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.775891 https://doi.org/10.1594/PANGAEA.775891 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.775891 https://doi.org/10.1594/PANGAEA.775891 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Fahl, Kirsten; Stein, Ruediger (2012): Modern seasonal variability and deglacial/Holocene change of central Arctic Ocean sea-ice cover: New insights from biomarker proxy records. Earth and Planetary Science Letters, 351-352, 123-133, https://doi.org/10.1016/j.epsl.2012.07.009 Arctic Ocean ARK-IX/4 ARK-XI/1 AWI_Paleo KAL Kasten corer Laptev Sea Mooring (long time) MOORY Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS2458-4 PS27 PS27/038 PS2756-1 PS36 PS36/051LOMO-2 Dataset 2012 ftpangaea https://doi.org/10.1594/PANGAEA.775891 https://doi.org/10.1016/j.epsl.2012.07.009 2023-01-20T07:32:25Z For the reconstruction of sea-ice variability, a biomarker approach which is based on (1) the determination of sea-ice diatom-specific highly-branched isoprenoid (IP25) and (2) the coupling of phytoplankton biomarkers and IP25 has been used. For the first time, such a data set was obtained from an array of two sediment traps deployed at the southern Lomonosov Ridge in the central Arctic Ocean at water depth of 150 m and 1550 m and recording the seasonal variability of sea ice cover in 1995/1996. These data indicate a predominantly permanent sea ice cover at the trap location between November 1995 and June 1996, an ice-edge situation with increased phytoplankton productivity and sea-ice algae input in July/August 1996, and the start of new-ice formation in late September. The record of modern sea-ice variability is then used to better interpret data from sediment core PS2458-4 recovered at the Laptev Sea continental slope close to the interception with Lomonosov Ridge and recording the post-glacial to Holocene change in sea-ice cover. Based on IP25 and phytoplankton biomarker data from Core PS2458-4, minimum sea-ice cover was reconstructed for the Bølling/Allerød warm interval between about 14.5 and 13 calendar kyr BP, followed by a rapid and distinct increase in sea-ice cover at about 12.8 calendar kyr BP. This sea-ice event was directly preceded by a dramatic freshwater event and a collapse of phytoplankton productivity, having started about 100 years earlier. These data are the first direct evidence that enhanced freshwater flux caused enhanced sea-ice formation in the Arctic at the beginning of the Younger Dryas. In combination with a contemporaneous, abrupt and very prominent freshwater/meltwater pulse in the Yermak Plateau/Fram Strait area these data may furthermore support the hypothesis that strongly enhanced freshwater (and ice) export from the Arctic into the North Atlantic could have played an important trigger role for the onset of the Younger Dryas cold reversal. During the Early Holocene, sea-ice ... Dataset Arctic Arctic Arctic Ocean Fram Strait ice algae laptev Laptev Sea Lomonosov Ridge North Atlantic Phytoplankton Sea ice Yermak plateau PANGAEA - Data Publisher for Earth & Environmental Science Arctic Arctic Ocean Laptev Sea Yermak Plateau ENVELOPE(5.000,5.000,81.250,81.250) ENVELOPE(133.398333,138.920000,81.071600,78.166667) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Arctic Ocean ARK-IX/4 ARK-XI/1 AWI_Paleo KAL Kasten corer Laptev Sea Mooring (long time) MOORY Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS2458-4 PS27 PS27/038 PS2756-1 PS36 PS36/051LOMO-2 |
spellingShingle |
Arctic Ocean ARK-IX/4 ARK-XI/1 AWI_Paleo KAL Kasten corer Laptev Sea Mooring (long time) MOORY Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS2458-4 PS27 PS27/038 PS2756-1 PS36 PS36/051LOMO-2 Fahl, Kirsten Stein, Ruediger Organic geochemical parameters (biomarker) in sedimentary sequences and sediment traps |
topic_facet |
Arctic Ocean ARK-IX/4 ARK-XI/1 AWI_Paleo KAL Kasten corer Laptev Sea Mooring (long time) MOORY Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS2458-4 PS27 PS27/038 PS2756-1 PS36 PS36/051LOMO-2 |
description |
For the reconstruction of sea-ice variability, a biomarker approach which is based on (1) the determination of sea-ice diatom-specific highly-branched isoprenoid (IP25) and (2) the coupling of phytoplankton biomarkers and IP25 has been used. For the first time, such a data set was obtained from an array of two sediment traps deployed at the southern Lomonosov Ridge in the central Arctic Ocean at water depth of 150 m and 1550 m and recording the seasonal variability of sea ice cover in 1995/1996. These data indicate a predominantly permanent sea ice cover at the trap location between November 1995 and June 1996, an ice-edge situation with increased phytoplankton productivity and sea-ice algae input in July/August 1996, and the start of new-ice formation in late September. The record of modern sea-ice variability is then used to better interpret data from sediment core PS2458-4 recovered at the Laptev Sea continental slope close to the interception with Lomonosov Ridge and recording the post-glacial to Holocene change in sea-ice cover. Based on IP25 and phytoplankton biomarker data from Core PS2458-4, minimum sea-ice cover was reconstructed for the Bølling/Allerød warm interval between about 14.5 and 13 calendar kyr BP, followed by a rapid and distinct increase in sea-ice cover at about 12.8 calendar kyr BP. This sea-ice event was directly preceded by a dramatic freshwater event and a collapse of phytoplankton productivity, having started about 100 years earlier. These data are the first direct evidence that enhanced freshwater flux caused enhanced sea-ice formation in the Arctic at the beginning of the Younger Dryas. In combination with a contemporaneous, abrupt and very prominent freshwater/meltwater pulse in the Yermak Plateau/Fram Strait area these data may furthermore support the hypothesis that strongly enhanced freshwater (and ice) export from the Arctic into the North Atlantic could have played an important trigger role for the onset of the Younger Dryas cold reversal. During the Early Holocene, sea-ice ... |
format |
Dataset |
author |
Fahl, Kirsten Stein, Ruediger |
author_facet |
Fahl, Kirsten Stein, Ruediger |
author_sort |
Fahl, Kirsten |
title |
Organic geochemical parameters (biomarker) in sedimentary sequences and sediment traps |
title_short |
Organic geochemical parameters (biomarker) in sedimentary sequences and sediment traps |
title_full |
Organic geochemical parameters (biomarker) in sedimentary sequences and sediment traps |
title_fullStr |
Organic geochemical parameters (biomarker) in sedimentary sequences and sediment traps |
title_full_unstemmed |
Organic geochemical parameters (biomarker) in sedimentary sequences and sediment traps |
title_sort |
organic geochemical parameters (biomarker) in sedimentary sequences and sediment traps |
publisher |
PANGAEA |
publishDate |
2012 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.775891 https://doi.org/10.1594/PANGAEA.775891 |
op_coverage |
MEDIAN LATITUDE: 79.619133 * MEDIAN LONGITUDE: 136.159167 * SOUTH-BOUND LATITUDE: 78.166667 * WEST-BOUND LONGITUDE: 133.398333 * NORTH-BOUND LATITUDE: 81.071600 * EAST-BOUND LONGITUDE: 138.920000 * DATE/TIME START: 1993-09-05T00:00:00 * DATE/TIME END: 1996-12-14T00:00:00 |
long_lat |
ENVELOPE(5.000,5.000,81.250,81.250) ENVELOPE(133.398333,138.920000,81.071600,78.166667) |
geographic |
Arctic Arctic Ocean Laptev Sea Yermak Plateau |
geographic_facet |
Arctic Arctic Ocean Laptev Sea Yermak Plateau |
genre |
Arctic Arctic Arctic Ocean Fram Strait ice algae laptev Laptev Sea Lomonosov Ridge North Atlantic Phytoplankton Sea ice Yermak plateau |
genre_facet |
Arctic Arctic Arctic Ocean Fram Strait ice algae laptev Laptev Sea Lomonosov Ridge North Atlantic Phytoplankton Sea ice Yermak plateau |
op_source |
Supplement to: Fahl, Kirsten; Stein, Ruediger (2012): Modern seasonal variability and deglacial/Holocene change of central Arctic Ocean sea-ice cover: New insights from biomarker proxy records. Earth and Planetary Science Letters, 351-352, 123-133, https://doi.org/10.1016/j.epsl.2012.07.009 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.775891 https://doi.org/10.1594/PANGAEA.775891 |
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.775891 https://doi.org/10.1016/j.epsl.2012.07.009 |
_version_ |
1766298156067192832 |