Fifty years of instrumental surface mass balance observations at Vostok Station, central Antarctica
We present the surface mass balance (SMB) dataset from Vostok Station's accumulation stake farms which provide the longest instrumental record of its kind obtained with a uniform technique in central Antarctica over the last 53 years. The snow build-up values at individual stakes demonstrate a...
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ftdoajarticles:oai:doaj.org/article:83ff874cefb64c2db55fdf1471e19faf 2023-10-09T21:47:03+02:00 Fifty years of instrumental surface mass balance observations at Vostok Station, central Antarctica Alexey A. Ekaykin Vladimir Ya. Lipenkov Natalia A. Tebenkova https://doi.org/10.1017/jog.2023.53 https://doaj.org/article/83ff874cefb64c2db55fdf1471e19faf EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143023000539/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2023.53 0022-1430 1727-5652 https://doaj.org/article/83ff874cefb64c2db55fdf1471e19faf Journal of Glaciology, Pp 1-13 Antarctica instrumental observations snow density surface mass balance Vostok station Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article ftdoajarticles https://doi.org/10.1017/jog.2023.53 2023-09-10T00:39:15Z We present the surface mass balance (SMB) dataset from Vostok Station's accumulation stake farms which provide the longest instrumental record of its kind obtained with a uniform technique in central Antarctica over the last 53 years. The snow build-up values at individual stakes demonstrate a strong random scatter related to the interaction of wind-driven snow with snow micro-relief. Because of this depositional noise, the signal-to-noise ratio (SNR) in individual SMB time series derived at single points (from stakes, snow pits or firn cores) is as low as 0.045. Averaging the data over the whole stake farm increases the SNR to 2.3 and thus allows us to investigate reliably the climatic variability of the SMB. Since 1970, the average snow accumulation rate at Vostok has been 22.5 ± 1.3 kg m−2 yr−1. Our data suggest an overall increase of the SMB during the observation period accompanied by a significant decadal variability. The main driver of this variability is local air temperature with an SMB temperature sensitivity of 2.4 ± 0.2 kg m−2 yr−1 K−1 (11 ± 2% K−1). A covariation between the Vostok SMB and the Southern Oscillation Index is also observed. Article in Journal/Newspaper Antarc* Antarctica Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Vostok Station ENVELOPE(106.837,106.837,-78.464,-78.464) Journal of Glaciology 1 13 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctica instrumental observations snow density surface mass balance Vostok station Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Antarctica instrumental observations snow density surface mass balance Vostok station Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Alexey A. Ekaykin Vladimir Ya. Lipenkov Natalia A. Tebenkova Fifty years of instrumental surface mass balance observations at Vostok Station, central Antarctica |
topic_facet |
Antarctica instrumental observations snow density surface mass balance Vostok station Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
We present the surface mass balance (SMB) dataset from Vostok Station's accumulation stake farms which provide the longest instrumental record of its kind obtained with a uniform technique in central Antarctica over the last 53 years. The snow build-up values at individual stakes demonstrate a strong random scatter related to the interaction of wind-driven snow with snow micro-relief. Because of this depositional noise, the signal-to-noise ratio (SNR) in individual SMB time series derived at single points (from stakes, snow pits or firn cores) is as low as 0.045. Averaging the data over the whole stake farm increases the SNR to 2.3 and thus allows us to investigate reliably the climatic variability of the SMB. Since 1970, the average snow accumulation rate at Vostok has been 22.5 ± 1.3 kg m−2 yr−1. Our data suggest an overall increase of the SMB during the observation period accompanied by a significant decadal variability. The main driver of this variability is local air temperature with an SMB temperature sensitivity of 2.4 ± 0.2 kg m−2 yr−1 K−1 (11 ± 2% K−1). A covariation between the Vostok SMB and the Southern Oscillation Index is also observed. |
format |
Article in Journal/Newspaper |
author |
Alexey A. Ekaykin Vladimir Ya. Lipenkov Natalia A. Tebenkova |
author_facet |
Alexey A. Ekaykin Vladimir Ya. Lipenkov Natalia A. Tebenkova |
author_sort |
Alexey A. Ekaykin |
title |
Fifty years of instrumental surface mass balance observations at Vostok Station, central Antarctica |
title_short |
Fifty years of instrumental surface mass balance observations at Vostok Station, central Antarctica |
title_full |
Fifty years of instrumental surface mass balance observations at Vostok Station, central Antarctica |
title_fullStr |
Fifty years of instrumental surface mass balance observations at Vostok Station, central Antarctica |
title_full_unstemmed |
Fifty years of instrumental surface mass balance observations at Vostok Station, central Antarctica |
title_sort |
fifty years of instrumental surface mass balance observations at vostok station, central antarctica |
publisher |
Cambridge University Press |
url |
https://doi.org/10.1017/jog.2023.53 https://doaj.org/article/83ff874cefb64c2db55fdf1471e19faf |
long_lat |
ENVELOPE(106.837,106.837,-78.464,-78.464) |
geographic |
Vostok Station |
geographic_facet |
Vostok Station |
genre |
Antarc* Antarctica Journal of Glaciology |
genre_facet |
Antarc* Antarctica Journal of Glaciology |
op_source |
Journal of Glaciology, Pp 1-13 |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143023000539/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2023.53 0022-1430 1727-5652 https://doaj.org/article/83ff874cefb64c2db55fdf1471e19faf |
op_doi |
https://doi.org/10.1017/jog.2023.53 |
container_title |
Journal of Glaciology |
container_start_page |
1 |
op_container_end_page |
13 |
_version_ |
1779309747715964928 |