Mass evolution of the Antarctic Peninsula over the last 2 decades from a joint Bayesian inversion
The Antarctic Peninsula has become an increasingly important component of the Antarctic Ice Sheet mass budget over the last 2 decades, with mass losses generally increasing. However, due to the challenges presented by the topography and geometry of the region, there remain large variations in mass b...
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2022
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ftdoajarticles:oai:doaj.org/article:b21669553d7e451996d6395864941207 2023-05-15T13:56:14+02:00 Mass evolution of the Antarctic Peninsula over the last 2 decades from a joint Bayesian inversion S. J. Chuter A. Zammit-Mangion J. Rougier G. Dawson J. L. Bamber 2022-04-01T00:00:00Z https://doi.org/10.5194/tc-16-1349-2022 https://doaj.org/article/b21669553d7e451996d6395864941207 EN eng Copernicus Publications https://tc.copernicus.org/articles/16/1349/2022/tc-16-1349-2022.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-16-1349-2022 1994-0416 1994-0424 https://doaj.org/article/b21669553d7e451996d6395864941207 The Cryosphere, Vol 16, Pp 1349-1367 (2022) Environmental sciences GE1-350 Geology QE1-996.5 article 2022 ftdoajarticles https://doi.org/10.5194/tc-16-1349-2022 2022-12-31T10:20:13Z The Antarctic Peninsula has become an increasingly important component of the Antarctic Ice Sheet mass budget over the last 2 decades, with mass losses generally increasing. However, due to the challenges presented by the topography and geometry of the region, there remain large variations in mass balance estimates from conventional approaches and in assessing the relative contribution of individual ice sheet processes. Here, we use a regionally optimized Bayesian hierarchical model joint inversion approach that combines data from multiple altimetry studies (ENVISAT, ICESat, CryoSat-2 swath), gravimetry (GRACE and GRACE-FO), and localized DEM differencing observations to solve for annual mass trends and their attribution to individual driving processes for the period 2003–2019. This is first time that such localized observations have been assimilated directly to estimate mass balance as part of a wider-scale regional assessment. The region experienced a mass imbalance rate of <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>-</mo><mn mathvariant="normal">19</mn><mo>±</mo><mn mathvariant="normal">1.1</mn></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="49pt" height="10pt" class="svg-formula" dspmath="mathimg" md5hash="973f3ec973f3c8c0f3f908d0f24bbaeb"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-16-1349-2022-ie00001.svg" width="49pt" height="10pt" src="tc-16-1349-2022-ie00001.png"/></svg:svg> Gt yr −1 between 2003 and 2019, predominantly driven by accelerations in ice dynamic mass losses in the first decade and sustained thereafter. Inter-annual variability is driven by surface processes, particularly in 2016 due to increased precipitation driven by an extreme El Niño, which temporarily returned the sector back to a state of positive mass balance. In the West Palmer Land and the English Coast regions, surface ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Ice Sheet Palmer Land The Cryosphere Directory of Open Access Journals: DOAJ Articles Antarctic Antarctic Peninsula Palmer Land ENVELOPE(-65.000,-65.000,-71.500,-71.500) The Antarctic The Cryosphere 16 4 1349 1367 |
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 S. J. Chuter A. Zammit-Mangion J. Rougier G. Dawson J. L. Bamber Mass evolution of the Antarctic Peninsula over the last 2 decades from a joint Bayesian inversion |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
The Antarctic Peninsula has become an increasingly important component of the Antarctic Ice Sheet mass budget over the last 2 decades, with mass losses generally increasing. However, due to the challenges presented by the topography and geometry of the region, there remain large variations in mass balance estimates from conventional approaches and in assessing the relative contribution of individual ice sheet processes. Here, we use a regionally optimized Bayesian hierarchical model joint inversion approach that combines data from multiple altimetry studies (ENVISAT, ICESat, CryoSat-2 swath), gravimetry (GRACE and GRACE-FO), and localized DEM differencing observations to solve for annual mass trends and their attribution to individual driving processes for the period 2003–2019. This is first time that such localized observations have been assimilated directly to estimate mass balance as part of a wider-scale regional assessment. The region experienced a mass imbalance rate of <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>-</mo><mn mathvariant="normal">19</mn><mo>±</mo><mn mathvariant="normal">1.1</mn></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="49pt" height="10pt" class="svg-formula" dspmath="mathimg" md5hash="973f3ec973f3c8c0f3f908d0f24bbaeb"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-16-1349-2022-ie00001.svg" width="49pt" height="10pt" src="tc-16-1349-2022-ie00001.png"/></svg:svg> Gt yr −1 between 2003 and 2019, predominantly driven by accelerations in ice dynamic mass losses in the first decade and sustained thereafter. Inter-annual variability is driven by surface processes, particularly in 2016 due to increased precipitation driven by an extreme El Niño, which temporarily returned the sector back to a state of positive mass balance. In the West Palmer Land and the English Coast regions, surface ... |
format |
Article in Journal/Newspaper |
author |
S. J. Chuter A. Zammit-Mangion J. Rougier G. Dawson J. L. Bamber |
author_facet |
S. J. Chuter A. Zammit-Mangion J. Rougier G. Dawson J. L. Bamber |
author_sort |
S. J. Chuter |
title |
Mass evolution of the Antarctic Peninsula over the last 2 decades from a joint Bayesian inversion |
title_short |
Mass evolution of the Antarctic Peninsula over the last 2 decades from a joint Bayesian inversion |
title_full |
Mass evolution of the Antarctic Peninsula over the last 2 decades from a joint Bayesian inversion |
title_fullStr |
Mass evolution of the Antarctic Peninsula over the last 2 decades from a joint Bayesian inversion |
title_full_unstemmed |
Mass evolution of the Antarctic Peninsula over the last 2 decades from a joint Bayesian inversion |
title_sort |
mass evolution of the antarctic peninsula over the last 2 decades from a joint bayesian inversion |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/tc-16-1349-2022 https://doaj.org/article/b21669553d7e451996d6395864941207 |
long_lat |
ENVELOPE(-65.000,-65.000,-71.500,-71.500) |
geographic |
Antarctic Antarctic Peninsula Palmer Land The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Palmer Land The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Sheet Palmer Land The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Sheet Palmer Land The Cryosphere |
op_source |
The Cryosphere, Vol 16, Pp 1349-1367 (2022) |
op_relation |
https://tc.copernicus.org/articles/16/1349/2022/tc-16-1349-2022.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-16-1349-2022 1994-0416 1994-0424 https://doaj.org/article/b21669553d7e451996d6395864941207 |
op_doi |
https://doi.org/10.5194/tc-16-1349-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
4 |
container_start_page |
1349 |
op_container_end_page |
1367 |
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1766263612947562496 |