Seasonal and interannual variability of the landfast ice mass balance between 2009 and 2018 in Prydz Bay, East Antarctica
Landfast ice (LFI) plays a crucial role for both the climate and the ecosystem of the Antarctic coastal regions. We investigate the snow and LFI mass balance in Prydz Bay using observations from 11 sea ice mass balance buoys (IMBs). The buoys were deployed offshore from the Chinese Zhongshan Station...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2023
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-17-917-2023 https://doaj.org/article/9c2f9ba912344fe1bd8219a01abb2984 |
id |
ftdoajarticles:oai:doaj.org/article:9c2f9ba912344fe1bd8219a01abb2984 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:9c2f9ba912344fe1bd8219a01abb2984 2023-05-15T13:44:33+02:00 Seasonal and interannual variability of the landfast ice mass balance between 2009 and 2018 in Prydz Bay, East Antarctica N. Li R. Lei P. Heil B. Cheng M. Ding Z. Tian B. Li 2023-02-01T00:00:00Z https://doi.org/10.5194/tc-17-917-2023 https://doaj.org/article/9c2f9ba912344fe1bd8219a01abb2984 EN eng Copernicus Publications https://tc.copernicus.org/articles/17/917/2023/tc-17-917-2023.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-17-917-2023 1994-0416 1994-0424 https://doaj.org/article/9c2f9ba912344fe1bd8219a01abb2984 The Cryosphere, Vol 17, Pp 917-937 (2023) Environmental sciences GE1-350 Geology QE1-996.5 article 2023 ftdoajarticles https://doi.org/10.5194/tc-17-917-2023 2023-03-05T01:34:58Z Landfast ice (LFI) plays a crucial role for both the climate and the ecosystem of the Antarctic coastal regions. We investigate the snow and LFI mass balance in Prydz Bay using observations from 11 sea ice mass balance buoys (IMBs). The buoys were deployed offshore from the Chinese Zhongshan Station (ZS) and Australian Davis Station (DS), with the measurements covering the ice seasons of 2009–2010, 2013–2016, and 2018. The observed annual maximum ice thickness and snow depth were 1.59 ± 0.17 and 0.11–0.76 m off ZS and 1.64 ± 0.08 and 0.11–0.38 m off DS, respectively. Early in the ice growth season (May–September), the LFI basal growth rate near DS (0.6 ± 0.2 cm d −1 ) was larger than that around ZS (0.5 ± 0.2 cm d −1 ). This is attributed to cooler air temperature (AT) and lower oceanic heat flux at that time in the DS region. Air temperature anomalies were more important in regulating the LFI growth rate at that time because of thinner sea ice having a weaker thermal inertia relative to thick ice in later seasons. Interannual and local spatial variabilities for the seasonality of LFI mass balance identified at ZS are larger than at DS due to local differences in topography and katabatic wind regime. Snow ice contributed up to 27 % of the LFI total ice thickness at the offshore site close to ground icebergs off ZS because of the substantial snow accumulation. Offshore from ZS, the supercooled water was observed at the sites close to the Dålk Glacier from July to October, which reduced the oceanic heat flux and promoted the LFI growth. During late austral spring and summer, the increased oceanic heat flux led to a reduction of LFI growth at all investigated sites. The variability of LFI properties across the study domain prevailed at interannual timescales, over any trend during the recent decades. Based on the results derived from this study, we argue that an increased understanding of snow (on LFI) processes, local atmospheric and oceanic conditions, as well as coastal morphology and bathymetry, are required to ... Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Iceberg* Prydz Bay Sea ice The Cryosphere Directory of Open Access Journals: DOAJ Articles Antarctic Austral Dålk Glacier ENVELOPE(76.472,76.472,-69.426,-69.426) Davis Station ENVELOPE(77.968,77.968,-68.576,-68.576) Davis-Station ENVELOPE(77.968,77.968,-68.576,-68.576) East Antarctica Prydz Bay The Antarctic Zhongshan ENVELOPE(76.371,76.371,-69.373,-69.373) Zhongshan Station ENVELOPE(76.371,76.371,-69.373,-69.373) The Cryosphere 17 2 917 937 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 N. Li R. Lei P. Heil B. Cheng M. Ding Z. Tian B. Li Seasonal and interannual variability of the landfast ice mass balance between 2009 and 2018 in Prydz Bay, East Antarctica |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Landfast ice (LFI) plays a crucial role for both the climate and the ecosystem of the Antarctic coastal regions. We investigate the snow and LFI mass balance in Prydz Bay using observations from 11 sea ice mass balance buoys (IMBs). The buoys were deployed offshore from the Chinese Zhongshan Station (ZS) and Australian Davis Station (DS), with the measurements covering the ice seasons of 2009–2010, 2013–2016, and 2018. The observed annual maximum ice thickness and snow depth were 1.59 ± 0.17 and 0.11–0.76 m off ZS and 1.64 ± 0.08 and 0.11–0.38 m off DS, respectively. Early in the ice growth season (May–September), the LFI basal growth rate near DS (0.6 ± 0.2 cm d −1 ) was larger than that around ZS (0.5 ± 0.2 cm d −1 ). This is attributed to cooler air temperature (AT) and lower oceanic heat flux at that time in the DS region. Air temperature anomalies were more important in regulating the LFI growth rate at that time because of thinner sea ice having a weaker thermal inertia relative to thick ice in later seasons. Interannual and local spatial variabilities for the seasonality of LFI mass balance identified at ZS are larger than at DS due to local differences in topography and katabatic wind regime. Snow ice contributed up to 27 % of the LFI total ice thickness at the offshore site close to ground icebergs off ZS because of the substantial snow accumulation. Offshore from ZS, the supercooled water was observed at the sites close to the Dålk Glacier from July to October, which reduced the oceanic heat flux and promoted the LFI growth. During late austral spring and summer, the increased oceanic heat flux led to a reduction of LFI growth at all investigated sites. The variability of LFI properties across the study domain prevailed at interannual timescales, over any trend during the recent decades. Based on the results derived from this study, we argue that an increased understanding of snow (on LFI) processes, local atmospheric and oceanic conditions, as well as coastal morphology and bathymetry, are required to ... |
format |
Article in Journal/Newspaper |
author |
N. Li R. Lei P. Heil B. Cheng M. Ding Z. Tian B. Li |
author_facet |
N. Li R. Lei P. Heil B. Cheng M. Ding Z. Tian B. Li |
author_sort |
N. Li |
title |
Seasonal and interannual variability of the landfast ice mass balance between 2009 and 2018 in Prydz Bay, East Antarctica |
title_short |
Seasonal and interannual variability of the landfast ice mass balance between 2009 and 2018 in Prydz Bay, East Antarctica |
title_full |
Seasonal and interannual variability of the landfast ice mass balance between 2009 and 2018 in Prydz Bay, East Antarctica |
title_fullStr |
Seasonal and interannual variability of the landfast ice mass balance between 2009 and 2018 in Prydz Bay, East Antarctica |
title_full_unstemmed |
Seasonal and interannual variability of the landfast ice mass balance between 2009 and 2018 in Prydz Bay, East Antarctica |
title_sort |
seasonal and interannual variability of the landfast ice mass balance between 2009 and 2018 in prydz bay, east antarctica |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/tc-17-917-2023 https://doaj.org/article/9c2f9ba912344fe1bd8219a01abb2984 |
long_lat |
ENVELOPE(76.472,76.472,-69.426,-69.426) ENVELOPE(77.968,77.968,-68.576,-68.576) ENVELOPE(77.968,77.968,-68.576,-68.576) ENVELOPE(76.371,76.371,-69.373,-69.373) ENVELOPE(76.371,76.371,-69.373,-69.373) |
geographic |
Antarctic Austral Dålk Glacier Davis Station Davis-Station East Antarctica Prydz Bay The Antarctic Zhongshan Zhongshan Station |
geographic_facet |
Antarctic Austral Dålk Glacier Davis Station Davis-Station East Antarctica Prydz Bay The Antarctic Zhongshan Zhongshan Station |
genre |
Antarc* Antarctic Antarctica East Antarctica Iceberg* Prydz Bay Sea ice The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Iceberg* Prydz Bay Sea ice The Cryosphere |
op_source |
The Cryosphere, Vol 17, Pp 917-937 (2023) |
op_relation |
https://tc.copernicus.org/articles/17/917/2023/tc-17-917-2023.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-17-917-2023 1994-0416 1994-0424 https://doaj.org/article/9c2f9ba912344fe1bd8219a01abb2984 |
op_doi |
https://doi.org/10.5194/tc-17-917-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
2 |
container_start_page |
917 |
op_container_end_page |
937 |
_version_ |
1766203081569075200 |