Temporal variability in snow accumulation and density at Summit Camp, Greenland ice sheet
A 3-year record of weekly snow water equivalent (SWE) accumulation at Summit Camp, central Greenland ice sheet, obtained by direct sampling, is presented. While the overall SWE accumulation of 24.2 cm w.e. a−1 matches long-term ice core estimates, variability increases at shorter timescales. Half of...
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Cambridge University Press
2022
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Online Access: | https://doi.org/10.1017/jog.2022.21 https://doaj.org/article/c1db0ab7277246e1a8833e404721cc66 |
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ftdoajarticles:oai:doaj.org/article:c1db0ab7277246e1a8833e404721cc66 2023-05-15T16:27:42+02:00 Temporal variability in snow accumulation and density at Summit Camp, Greenland ice sheet Ian M. Howat 2022-12-01T00:00:00Z https://doi.org/10.1017/jog.2022.21 https://doaj.org/article/c1db0ab7277246e1a8833e404721cc66 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143022000211/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2022.21 0022-1430 1727-5652 https://doaj.org/article/c1db0ab7277246e1a8833e404721cc66 Journal of Glaciology, Vol 68, Pp 1076-1084 (2022) Accumulation ice-sheet mass balance snow/ice surface processes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2022 ftdoajarticles https://doi.org/10.1017/jog.2022.21 2023-03-12T01:30:54Z A 3-year record of weekly snow water equivalent (SWE) accumulation at Summit Camp, central Greenland ice sheet, obtained by direct sampling, is presented. While the overall SWE accumulation of 24.2 cm w.e. a−1 matches long-term ice core estimates, variability increases at shorter timescales. Half of the annual SWE accumulation occurs during a few large events, with the average accumulation rate decreasing 35% between the first and second halves of the record coinciding with exceptional anticyclonic conditions in the spring and summer of 2019. No seasonality in accumulation is detected. Rather, local accumulation rates appear to be significantly impacted by wind redistribution that obscures temporal patterns in snowfall. Surface snow density is consistent, on average, with previously measured values but does not correlate with near surface temperature or wind speed. Two surface mass balance reanalysis models significantly underestimate accumulation rates at Summit Camp. This is concerning because such models are often used to estimate ice-sheet mass loss. Article in Journal/Newspaper Greenland ice core Ice Sheet Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Greenland Summit Camp ENVELOPE(-38.453,-38.453,72.579,72.579) Journal of Glaciology 68 272 1076 1084 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Accumulation ice-sheet mass balance snow/ice surface processes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Accumulation ice-sheet mass balance snow/ice surface processes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Ian M. Howat Temporal variability in snow accumulation and density at Summit Camp, Greenland ice sheet |
topic_facet |
Accumulation ice-sheet mass balance snow/ice surface processes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
A 3-year record of weekly snow water equivalent (SWE) accumulation at Summit Camp, central Greenland ice sheet, obtained by direct sampling, is presented. While the overall SWE accumulation of 24.2 cm w.e. a−1 matches long-term ice core estimates, variability increases at shorter timescales. Half of the annual SWE accumulation occurs during a few large events, with the average accumulation rate decreasing 35% between the first and second halves of the record coinciding with exceptional anticyclonic conditions in the spring and summer of 2019. No seasonality in accumulation is detected. Rather, local accumulation rates appear to be significantly impacted by wind redistribution that obscures temporal patterns in snowfall. Surface snow density is consistent, on average, with previously measured values but does not correlate with near surface temperature or wind speed. Two surface mass balance reanalysis models significantly underestimate accumulation rates at Summit Camp. This is concerning because such models are often used to estimate ice-sheet mass loss. |
format |
Article in Journal/Newspaper |
author |
Ian M. Howat |
author_facet |
Ian M. Howat |
author_sort |
Ian M. Howat |
title |
Temporal variability in snow accumulation and density at Summit Camp, Greenland ice sheet |
title_short |
Temporal variability in snow accumulation and density at Summit Camp, Greenland ice sheet |
title_full |
Temporal variability in snow accumulation and density at Summit Camp, Greenland ice sheet |
title_fullStr |
Temporal variability in snow accumulation and density at Summit Camp, Greenland ice sheet |
title_full_unstemmed |
Temporal variability in snow accumulation and density at Summit Camp, Greenland ice sheet |
title_sort |
temporal variability in snow accumulation and density at summit camp, greenland ice sheet |
publisher |
Cambridge University Press |
publishDate |
2022 |
url |
https://doi.org/10.1017/jog.2022.21 https://doaj.org/article/c1db0ab7277246e1a8833e404721cc66 |
long_lat |
ENVELOPE(-38.453,-38.453,72.579,72.579) |
geographic |
Greenland Summit Camp |
geographic_facet |
Greenland Summit Camp |
genre |
Greenland ice core Ice Sheet Journal of Glaciology |
genre_facet |
Greenland ice core Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 68, Pp 1076-1084 (2022) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143022000211/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2022.21 0022-1430 1727-5652 https://doaj.org/article/c1db0ab7277246e1a8833e404721cc66 |
op_doi |
https://doi.org/10.1017/jog.2022.21 |
container_title |
Journal of Glaciology |
container_volume |
68 |
container_issue |
272 |
container_start_page |
1076 |
op_container_end_page |
1084 |
_version_ |
1766017153160445952 |