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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ftdoajarticles:oai:doaj.org/article:ec7e290ea858497cb6dea4ba3b444b99 2023-05-15T13:36:28+02:00 A 2000-year annual record of snow accumulation rates for Law Dome, East Antarctica J. Roberts C. Plummer T. Vance T. van Ommen A. Moy S. Poynter A. Treverrow M. Curran S. George 2015-05-01T00:00:00Z https://doi.org/10.5194/cp-11-697-2015 https://doaj.org/article/ec7e290ea858497cb6dea4ba3b444b99 EN eng Copernicus Publications http://www.clim-past.net/11/697/2015/cp-11-697-2015.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-11-697-2015 https://doaj.org/article/ec7e290ea858497cb6dea4ba3b444b99 Climate of the Past, Vol 11, Iss 5, Pp 697-707 (2015) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2015 ftdoajarticles https://doi.org/10.5194/cp-11-697-2015 2022-12-31T00:40:01Z 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 Directory of Open Access Journals: DOAJ Articles 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 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 J. Roberts C. Plummer T. Vance T. van Ommen A. Moy S. Poynter A. Treverrow M. Curran S. George A 2000-year annual record of snow accumulation rates for Law Dome, East Antarctica |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
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 |
J. Roberts C. Plummer T. Vance T. van Ommen A. Moy S. Poynter A. Treverrow M. Curran S. George |
author_facet |
J. Roberts C. Plummer T. Vance T. van Ommen A. Moy S. Poynter A. Treverrow M. Curran S. George |
author_sort |
J. Roberts |
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://doaj.org/article/ec7e290ea858497cb6dea4ba3b444b99 |
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_source |
Climate of the Past, Vol 11, Iss 5, Pp 697-707 (2015) |
op_relation |
http://www.clim-past.net/11/697/2015/cp-11-697-2015.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-11-697-2015 https://doaj.org/article/ec7e290ea858497cb6dea4ba3b444b99 |
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_ |
1766079105144455168 |