A 2000-year annual record of snow accumulation rates for Law Dome, East Antarctica
Accurate high-resolution records of snow accumulation rates in Antarctica are crucial for estimating ice sheet mass balance and subsequent sea level change. Snowfall rates at Law Dome, East Antarctica, have been linked with regional atmospheric circulation to the mid-latitudes as well as regional An...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00016661 2023-05-15T13:41:02+02:00 A 2000-year annual record of snow accumulation rates for Law Dome, East Antarctica Roberts, J. Plummer, C. Vance, T. van Ommen, T. Moy, A. Poynter, S. Treverrow, A. Curran, M. George, S. 2015-05 electronic https://doi.org/10.5194/cp-11-697-2015 https://noa.gwlb.de/receive/cop_mods_00016661 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00016616/cp-11-697-2015.pdf https://cp.copernicus.org/articles/11/697/2015/cp-11-697-2015.pdf eng eng Copernicus Publications Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-11-697-2015 https://noa.gwlb.de/receive/cop_mods_00016661 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00016616/cp-11-697-2015.pdf https://cp.copernicus.org/articles/11/697/2015/cp-11-697-2015.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2015 ftnonlinearchiv https://doi.org/10.5194/cp-11-697-2015 2022-02-08T22:54:04Z Accurate high-resolution records of snow accumulation rates in Antarctica are crucial for estimating ice sheet mass balance and subsequent sea level change. Snowfall rates at Law Dome, East Antarctica, have been linked with regional atmospheric circulation to the mid-latitudes as well as regional Antarctic snowfall. Here, we extend the length of the Law Dome accumulation record from 750 years to 2035 years, using recent annual layer dating that extends to 22 BCE. Accumulation rates were calculated as the ratio of measured to modelled layer thicknesses, multiplied by the long-term mean accumulation rate. The modelled layer thicknesses were based on a power-law vertical strain rate profile fitted to observed annual layer thickness. The periods 380–442, 727–783 and 1970–2009 CE have above-average snow accumulation rates, while 663–704, 933–975 and 1429–1468 CE were below average, and decadal-scale snow accumulation anomalies were found to be relatively common (74 events in the 2035-year record). The calculated snow accumulation rates show good correlation with atmospheric reanalysis estimates, and significant spatial correlation over a wide expanse of East Antarctica, demonstrating that the Law Dome record captures larger-scale variability across a large region of East Antarctica well beyond the immediate vicinity of the Law Dome summit. Spectral analysis reveals periodicities in the snow accumulation record which may be related to El Niño–Southern Oscillation (ENSO) and Interdecadal Pacific Oscillation (IPO) frequencies. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet Niedersächsisches Online-Archiv NOA Antarctic East Antarctica Law Dome ENVELOPE(112.833,112.833,-66.733,-66.733) Law Dome Summit ENVELOPE(112.833,112.833,-66.733,-66.733) Pacific Climate of the Past 11 5 697 707 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Roberts, J. Plummer, C. Vance, T. van Ommen, T. Moy, A. Poynter, S. Treverrow, A. Curran, M. George, S. A 2000-year annual record of snow accumulation rates for Law Dome, East Antarctica |
topic_facet |
article Verlagsveröffentlichung |
description |
Accurate high-resolution records of snow accumulation rates in Antarctica are crucial for estimating ice sheet mass balance and subsequent sea level change. Snowfall rates at Law Dome, East Antarctica, have been linked with regional atmospheric circulation to the mid-latitudes as well as regional Antarctic snowfall. Here, we extend the length of the Law Dome accumulation record from 750 years to 2035 years, using recent annual layer dating that extends to 22 BCE. Accumulation rates were calculated as the ratio of measured to modelled layer thicknesses, multiplied by the long-term mean accumulation rate. The modelled layer thicknesses were based on a power-law vertical strain rate profile fitted to observed annual layer thickness. The periods 380–442, 727–783 and 1970–2009 CE have above-average snow accumulation rates, while 663–704, 933–975 and 1429–1468 CE were below average, and decadal-scale snow accumulation anomalies were found to be relatively common (74 events in the 2035-year record). The calculated snow accumulation rates show good correlation with atmospheric reanalysis estimates, and significant spatial correlation over a wide expanse of East Antarctica, demonstrating that the Law Dome record captures larger-scale variability across a large region of East Antarctica well beyond the immediate vicinity of the Law Dome summit. Spectral analysis reveals periodicities in the snow accumulation record which may be related to El Niño–Southern Oscillation (ENSO) and Interdecadal Pacific Oscillation (IPO) frequencies. |
format |
Article in Journal/Newspaper |
author |
Roberts, J. Plummer, C. Vance, T. van Ommen, T. Moy, A. Poynter, S. Treverrow, A. Curran, M. George, S. |
author_facet |
Roberts, J. Plummer, C. Vance, T. van Ommen, T. Moy, A. Poynter, S. Treverrow, A. Curran, M. George, S. |
author_sort |
Roberts, J. |
title |
A 2000-year annual record of snow accumulation rates for Law Dome, East Antarctica |
title_short |
A 2000-year annual record of snow accumulation rates for Law Dome, East Antarctica |
title_full |
A 2000-year annual record of snow accumulation rates for Law Dome, East Antarctica |
title_fullStr |
A 2000-year annual record of snow accumulation rates for Law Dome, East Antarctica |
title_full_unstemmed |
A 2000-year annual record of snow accumulation rates for Law Dome, East Antarctica |
title_sort |
2000-year annual record of snow accumulation rates for law dome, east antarctica |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/cp-11-697-2015 https://noa.gwlb.de/receive/cop_mods_00016661 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00016616/cp-11-697-2015.pdf https://cp.copernicus.org/articles/11/697/2015/cp-11-697-2015.pdf |
long_lat |
ENVELOPE(112.833,112.833,-66.733,-66.733) ENVELOPE(112.833,112.833,-66.733,-66.733) |
geographic |
Antarctic East Antarctica Law Dome Law Dome Summit Pacific |
geographic_facet |
Antarctic East Antarctica Law Dome Law Dome Summit Pacific |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
op_relation |
Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-11-697-2015 https://noa.gwlb.de/receive/cop_mods_00016661 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00016616/cp-11-697-2015.pdf https://cp.copernicus.org/articles/11/697/2015/cp-11-697-2015.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-11-697-2015 |
container_title |
Climate of the Past |
container_volume |
11 |
container_issue |
5 |
container_start_page |
697 |
op_container_end_page |
707 |
_version_ |
1766144963729424384 |