A 15-year circum-Antarctic iceberg calving dataset derived from continuous satellite observations
Iceberg calving is the main process that facilitates the dynamic mass loss of ice sheets into the ocean, which accounts for approximately half of the mass loss of the Antarctic ice sheet. Fine-scale calving variability observations can help reveal the calving mechanisms and identify the principal pr...
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ftdoajarticles:oai:doaj.org/article:71c72b4f99aa483ca15722ffdf11008e 2023-05-15T13:42:35+02:00 A 15-year circum-Antarctic iceberg calving dataset derived from continuous satellite observations M. Qi Y. Liu J. Liu X. Cheng Y. Lin Q. Feng Q. Shen Z. Yu 2021-09-01T00:00:00Z https://doi.org/10.5194/essd-13-4583-2021 https://doaj.org/article/71c72b4f99aa483ca15722ffdf11008e EN eng Copernicus Publications https://essd.copernicus.org/articles/13/4583/2021/essd-13-4583-2021.pdf https://doaj.org/toc/1866-3508 https://doaj.org/toc/1866-3516 doi:10.5194/essd-13-4583-2021 1866-3508 1866-3516 https://doaj.org/article/71c72b4f99aa483ca15722ffdf11008e Earth System Science Data, Vol 13, Pp 4583-4601 (2021) Environmental sciences GE1-350 Geology QE1-996.5 article 2021 ftdoajarticles https://doi.org/10.5194/essd-13-4583-2021 2022-12-31T06:30:52Z Iceberg calving is the main process that facilitates the dynamic mass loss of ice sheets into the ocean, which accounts for approximately half of the mass loss of the Antarctic ice sheet. Fine-scale calving variability observations can help reveal the calving mechanisms and identify the principal processes that influence how the changing climate affects global sea level through the ice shelf buttressing effect on the Antarctic ice sheet. Iceberg calving from entire ice shelves for short time intervals or from specific ice shelves for long time intervals has been monitored before, but there is still a lack of consistent, long-term, and high-precision records on independent calving events for all of the Antarctic ice shelves. In this study, a 15-year annual iceberg calving product measuring every independent calving event larger than 1 km 2 over all of the Antarctic ice shelves that occurred from August 2005 to August 2020 was developed based on 16 years of continuous satellite observations. First, the expansion of the ice shelf frontal coastline was simulated according to ice velocity; following this, the calved areas, which are considered to be the differences between the simulated coastline, were manually delineated, and the actual coastline was derived from the corresponding satellite imagery, based on multisource optical and synthetic aperture radar (SAR) images. The product provides detailed information on each calving event, including the associated year of occurrence, area, size, average thickness, mass, recurrence interval, and measurement uncertainties. A total of 1975 annual calving events larger than 1 km 2 were detected on the Antarctic ice shelves from August 2005 to August 2020. The average annual calved area was measured as 3549.1 km 2 with an uncertainty value of 14.3 km 2 , and the average calving rate was measured as 770.3 Gt yr −1 with an uncertainty value of 29.5 Gt yr −1 . The number of calving events, calved area, and calved mass fluctuated moderately during the first decade, followed by a ... Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Iceberg* Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Earth System Science Data 13 9 4583 4601 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 M. Qi Y. Liu J. Liu X. Cheng Y. Lin Q. Feng Q. Shen Z. Yu A 15-year circum-Antarctic iceberg calving dataset derived from continuous satellite observations |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Iceberg calving is the main process that facilitates the dynamic mass loss of ice sheets into the ocean, which accounts for approximately half of the mass loss of the Antarctic ice sheet. Fine-scale calving variability observations can help reveal the calving mechanisms and identify the principal processes that influence how the changing climate affects global sea level through the ice shelf buttressing effect on the Antarctic ice sheet. Iceberg calving from entire ice shelves for short time intervals or from specific ice shelves for long time intervals has been monitored before, but there is still a lack of consistent, long-term, and high-precision records on independent calving events for all of the Antarctic ice shelves. In this study, a 15-year annual iceberg calving product measuring every independent calving event larger than 1 km 2 over all of the Antarctic ice shelves that occurred from August 2005 to August 2020 was developed based on 16 years of continuous satellite observations. First, the expansion of the ice shelf frontal coastline was simulated according to ice velocity; following this, the calved areas, which are considered to be the differences between the simulated coastline, were manually delineated, and the actual coastline was derived from the corresponding satellite imagery, based on multisource optical and synthetic aperture radar (SAR) images. The product provides detailed information on each calving event, including the associated year of occurrence, area, size, average thickness, mass, recurrence interval, and measurement uncertainties. A total of 1975 annual calving events larger than 1 km 2 were detected on the Antarctic ice shelves from August 2005 to August 2020. The average annual calved area was measured as 3549.1 km 2 with an uncertainty value of 14.3 km 2 , and the average calving rate was measured as 770.3 Gt yr −1 with an uncertainty value of 29.5 Gt yr −1 . The number of calving events, calved area, and calved mass fluctuated moderately during the first decade, followed by a ... |
format |
Article in Journal/Newspaper |
author |
M. Qi Y. Liu J. Liu X. Cheng Y. Lin Q. Feng Q. Shen Z. Yu |
author_facet |
M. Qi Y. Liu J. Liu X. Cheng Y. Lin Q. Feng Q. Shen Z. Yu |
author_sort |
M. Qi |
title |
A 15-year circum-Antarctic iceberg calving dataset derived from continuous satellite observations |
title_short |
A 15-year circum-Antarctic iceberg calving dataset derived from continuous satellite observations |
title_full |
A 15-year circum-Antarctic iceberg calving dataset derived from continuous satellite observations |
title_fullStr |
A 15-year circum-Antarctic iceberg calving dataset derived from continuous satellite observations |
title_full_unstemmed |
A 15-year circum-Antarctic iceberg calving dataset derived from continuous satellite observations |
title_sort |
15-year circum-antarctic iceberg calving dataset derived from continuous satellite observations |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/essd-13-4583-2021 https://doaj.org/article/71c72b4f99aa483ca15722ffdf11008e |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Iceberg* |
genre_facet |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Iceberg* |
op_source |
Earth System Science Data, Vol 13, Pp 4583-4601 (2021) |
op_relation |
https://essd.copernicus.org/articles/13/4583/2021/essd-13-4583-2021.pdf https://doaj.org/toc/1866-3508 https://doaj.org/toc/1866-3516 doi:10.5194/essd-13-4583-2021 1866-3508 1866-3516 https://doaj.org/article/71c72b4f99aa483ca15722ffdf11008e |
op_doi |
https://doi.org/10.5194/essd-13-4583-2021 |
container_title |
Earth System Science Data |
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13 |
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9 |
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4583 |
op_container_end_page |
4601 |
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1766169819377303552 |