Tracking Holocene drift-ice limits on the northwest–southwest Iceland shelf: Comparing proxy data with observation and historical evidence
We detail variations in the weight percent (wt%) of quartz, a proxy for drift ice, in fifteen marine sediment cores from the northwest, west, and southwest Iceland shelf throughout the past 10 cal ka BP. We present the first map of iceberg distributions in Iceland waters between 1983 and 2011 and a...
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Taylor & Francis
2019
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ftdatacite:10.6084/m9.figshare.8010824.v1 2023-05-15T16:46:35+02:00 Tracking Holocene drift-ice limits on the northwest–southwest Iceland shelf: Comparing proxy data with observation and historical evidence Andrews, John T. Jónsdóttir, Ingibjörg Geirsdóttir, Áslaug 2019 https://dx.doi.org/10.6084/m9.figshare.8010824.v1 https://tandf.figshare.com/articles/Tracking_Holocene_drift-ice_limits_on_the_northwest_southwest_Iceland_shelf_Comparing_proxy_data_with_observation_and_historical_evidence/8010824/1 unknown Taylor & Francis https://dx.doi.org/10.1080/15230430.2019.1592648 https://dx.doi.org/10.6084/m9.figshare.8010824 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology FOS Biological sciences 20199 Astronomical and Space Sciences not elsewhere classified FOS Physical sciences 69999 Biological Sciences not elsewhere classified Marine Biology Inorganic Chemistry FOS Chemical sciences 60506 Virology dataset Dataset 2019 ftdatacite https://doi.org/10.6084/m9.figshare.8010824.v1 https://doi.org/10.1080/15230430.2019.1592648 https://doi.org/10.6084/m9.figshare.8010824 2021-11-05T12:55:41Z We detail variations in the weight percent (wt%) of quartz, a proxy for drift ice, in fifteen marine sediment cores from the northwest, west, and southwest Iceland shelf throughout the past 10 cal ka BP. We present the first map of iceberg distributions in Iceland waters between 1983 and 2011 and a new compilation of sea-ice records in the century from 850 to 1950 CE. The wt% of quartz, determined by quantitative X-ray diffraction (qXRD) analysis, is used to evaluate changes in the importation of drift ice. Small wt% of quartz were added to milled basalt (0% quartz), and to a mixture of non-clay and clay minerals; the qXRD method replicated 0 percent quartz, while measured 1–3 percent quartz always resulted in a “presence” estimate. The outer sites in the northwest sector lie close to the average position of the sea-ice margin between 1870 and 1920 CE; the southwest shelf sites lie south of this limit. Transects of cores along the Húnaflói and Djúpáll troughs indicate that the traces of drift ice decrease rapidly landward from the outer sites. The cores from the west/southwest of Iceland have limited amounts of quartz, generally possibly limited incursions of drift ice. Dataset Iceland Sea ice DataCite Metadata Store (German National Library of Science and Technology) Húnaflói ENVELOPE(-20.864,-20.864,65.746,65.746) Djúpáll ENVELOPE(-23.617,-23.617,66.400,66.400) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology FOS Biological sciences 20199 Astronomical and Space Sciences not elsewhere classified FOS Physical sciences 69999 Biological Sciences not elsewhere classified Marine Biology Inorganic Chemistry FOS Chemical sciences 60506 Virology |
spellingShingle |
59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology FOS Biological sciences 20199 Astronomical and Space Sciences not elsewhere classified FOS Physical sciences 69999 Biological Sciences not elsewhere classified Marine Biology Inorganic Chemistry FOS Chemical sciences 60506 Virology Andrews, John T. Jónsdóttir, Ingibjörg Geirsdóttir, Áslaug Tracking Holocene drift-ice limits on the northwest–southwest Iceland shelf: Comparing proxy data with observation and historical evidence |
topic_facet |
59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology FOS Biological sciences 20199 Astronomical and Space Sciences not elsewhere classified FOS Physical sciences 69999 Biological Sciences not elsewhere classified Marine Biology Inorganic Chemistry FOS Chemical sciences 60506 Virology |
description |
We detail variations in the weight percent (wt%) of quartz, a proxy for drift ice, in fifteen marine sediment cores from the northwest, west, and southwest Iceland shelf throughout the past 10 cal ka BP. We present the first map of iceberg distributions in Iceland waters between 1983 and 2011 and a new compilation of sea-ice records in the century from 850 to 1950 CE. The wt% of quartz, determined by quantitative X-ray diffraction (qXRD) analysis, is used to evaluate changes in the importation of drift ice. Small wt% of quartz were added to milled basalt (0% quartz), and to a mixture of non-clay and clay minerals; the qXRD method replicated 0 percent quartz, while measured 1–3 percent quartz always resulted in a “presence” estimate. The outer sites in the northwest sector lie close to the average position of the sea-ice margin between 1870 and 1920 CE; the southwest shelf sites lie south of this limit. Transects of cores along the Húnaflói and Djúpáll troughs indicate that the traces of drift ice decrease rapidly landward from the outer sites. The cores from the west/southwest of Iceland have limited amounts of quartz, generally possibly limited incursions of drift ice. |
format |
Dataset |
author |
Andrews, John T. Jónsdóttir, Ingibjörg Geirsdóttir, Áslaug |
author_facet |
Andrews, John T. Jónsdóttir, Ingibjörg Geirsdóttir, Áslaug |
author_sort |
Andrews, John T. |
title |
Tracking Holocene drift-ice limits on the northwest–southwest Iceland shelf: Comparing proxy data with observation and historical evidence |
title_short |
Tracking Holocene drift-ice limits on the northwest–southwest Iceland shelf: Comparing proxy data with observation and historical evidence |
title_full |
Tracking Holocene drift-ice limits on the northwest–southwest Iceland shelf: Comparing proxy data with observation and historical evidence |
title_fullStr |
Tracking Holocene drift-ice limits on the northwest–southwest Iceland shelf: Comparing proxy data with observation and historical evidence |
title_full_unstemmed |
Tracking Holocene drift-ice limits on the northwest–southwest Iceland shelf: Comparing proxy data with observation and historical evidence |
title_sort |
tracking holocene drift-ice limits on the northwest–southwest iceland shelf: comparing proxy data with observation and historical evidence |
publisher |
Taylor & Francis |
publishDate |
2019 |
url |
https://dx.doi.org/10.6084/m9.figshare.8010824.v1 https://tandf.figshare.com/articles/Tracking_Holocene_drift-ice_limits_on_the_northwest_southwest_Iceland_shelf_Comparing_proxy_data_with_observation_and_historical_evidence/8010824/1 |
long_lat |
ENVELOPE(-20.864,-20.864,65.746,65.746) ENVELOPE(-23.617,-23.617,66.400,66.400) |
geographic |
Húnaflói Djúpáll |
geographic_facet |
Húnaflói Djúpáll |
genre |
Iceland Sea ice |
genre_facet |
Iceland Sea ice |
op_relation |
https://dx.doi.org/10.1080/15230430.2019.1592648 https://dx.doi.org/10.6084/m9.figshare.8010824 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.8010824.v1 https://doi.org/10.1080/15230430.2019.1592648 https://doi.org/10.6084/m9.figshare.8010824 |
_version_ |
1766036680724185088 |