Mass Loss of Totten and Moscow University Glaciers, East Antarctica, Using Regionally Optimized GRACE Mascons
Totten and Moscow University glaciers, in the marine-based sector of East Antarctica, contain enough ice to raise sea level by 5m. Obtaining precise measurements of their mass balance is challenging owing to large area of the basins and the small mass balance signal compared to West Antarctic glacie...
Published in: | Geophysical Research Letters |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
eScholarship, University of California
2018
|
Subjects: | |
Online Access: | https://escholarship.org/uc/item/21c3r9dv https://escholarship.org/content/qt21c3r9dv/qt21c3r9dv.pdf https://doi.org/10.1029/2018gl078173 |
id |
ftcdlib:oai:escholarship.org:ark:/13030/qt21c3r9dv |
---|---|
record_format |
openpolar |
spelling |
ftcdlib:oai:escholarship.org:ark:/13030/qt21c3r9dv 2024-09-15T17:46:53+00:00 Mass Loss of Totten and Moscow University Glaciers, East Antarctica, Using Regionally Optimized GRACE Mascons Mohajerani, Yara Velicogna, Isabella Rignot, Eric 7010 - 7018 2018-07-28 application/pdf https://escholarship.org/uc/item/21c3r9dv https://escholarship.org/content/qt21c3r9dv/qt21c3r9dv.pdf https://doi.org/10.1029/2018gl078173 unknown eScholarship, University of California qt21c3r9dv https://escholarship.org/uc/item/21c3r9dv https://escholarship.org/content/qt21c3r9dv/qt21c3r9dv.pdf doi:10.1029/2018gl078173 CC-BY Geophysical Research Letters, vol 45, iss 14 Climate Action Totten glacier East Antarctica GRACE regional climate models mass budget mass balance Meteorology & Atmospheric Sciences article 2018 ftcdlib https://doi.org/10.1029/2018gl078173 2024-06-28T06:28:19Z Totten and Moscow University glaciers, in the marine-based sector of East Antarctica, contain enough ice to raise sea level by 5m. Obtaining precise measurements of their mass balance is challenging owing to large area of the basins and the small mass balance signal compared to West Antarctic glaciers. Here we employ a locally optimized processing of Gravity Recovery and Climate Experiment (GRACE) harmonics to evaluate their mass balance at the sub-basin scale and compare the results with mass budget method (MBM) estimates using regional atmospheric climate model version 2.3 (RACMO2.3) or Modèle Atmosphérique Régional version 3.6.4 (MAR3.6.4). The sub-basin mass loss estimate for April 2002 to November 2015 is 14.8 ± 4.3Gt/yr, which is weakly affected by glacial isostatic adjustment uncertainties (±1.4Gt/yr). This result agrees with MBM/RACMO2.3 (15.8 ± 2.0Gt/yr), whereas MBM/MAR3.6.4 underestimates the loss (6.6 ± 1.6Gt/yr). For the entire drainage, the mass loss for April 2002 to August 2016 is 18.5 ± 6.6Gt/yr, or 15 ± 4% of its ice flux. These results provide unequivocal evidence for mass loss in this East Antarctic sector. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Totten Glacier University of California: eScholarship Geophysical Research Letters 45 14 7010 7018 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Climate Action Totten glacier East Antarctica GRACE regional climate models mass budget mass balance Meteorology & Atmospheric Sciences |
spellingShingle |
Climate Action Totten glacier East Antarctica GRACE regional climate models mass budget mass balance Meteorology & Atmospheric Sciences Mohajerani, Yara Velicogna, Isabella Rignot, Eric Mass Loss of Totten and Moscow University Glaciers, East Antarctica, Using Regionally Optimized GRACE Mascons |
topic_facet |
Climate Action Totten glacier East Antarctica GRACE regional climate models mass budget mass balance Meteorology & Atmospheric Sciences |
description |
Totten and Moscow University glaciers, in the marine-based sector of East Antarctica, contain enough ice to raise sea level by 5m. Obtaining precise measurements of their mass balance is challenging owing to large area of the basins and the small mass balance signal compared to West Antarctic glaciers. Here we employ a locally optimized processing of Gravity Recovery and Climate Experiment (GRACE) harmonics to evaluate their mass balance at the sub-basin scale and compare the results with mass budget method (MBM) estimates using regional atmospheric climate model version 2.3 (RACMO2.3) or Modèle Atmosphérique Régional version 3.6.4 (MAR3.6.4). The sub-basin mass loss estimate for April 2002 to November 2015 is 14.8 ± 4.3Gt/yr, which is weakly affected by glacial isostatic adjustment uncertainties (±1.4Gt/yr). This result agrees with MBM/RACMO2.3 (15.8 ± 2.0Gt/yr), whereas MBM/MAR3.6.4 underestimates the loss (6.6 ± 1.6Gt/yr). For the entire drainage, the mass loss for April 2002 to August 2016 is 18.5 ± 6.6Gt/yr, or 15 ± 4% of its ice flux. These results provide unequivocal evidence for mass loss in this East Antarctic sector. |
format |
Article in Journal/Newspaper |
author |
Mohajerani, Yara Velicogna, Isabella Rignot, Eric |
author_facet |
Mohajerani, Yara Velicogna, Isabella Rignot, Eric |
author_sort |
Mohajerani, Yara |
title |
Mass Loss of Totten and Moscow University Glaciers, East Antarctica, Using Regionally Optimized GRACE Mascons |
title_short |
Mass Loss of Totten and Moscow University Glaciers, East Antarctica, Using Regionally Optimized GRACE Mascons |
title_full |
Mass Loss of Totten and Moscow University Glaciers, East Antarctica, Using Regionally Optimized GRACE Mascons |
title_fullStr |
Mass Loss of Totten and Moscow University Glaciers, East Antarctica, Using Regionally Optimized GRACE Mascons |
title_full_unstemmed |
Mass Loss of Totten and Moscow University Glaciers, East Antarctica, Using Regionally Optimized GRACE Mascons |
title_sort |
mass loss of totten and moscow university glaciers, east antarctica, using regionally optimized grace mascons |
publisher |
eScholarship, University of California |
publishDate |
2018 |
url |
https://escholarship.org/uc/item/21c3r9dv https://escholarship.org/content/qt21c3r9dv/qt21c3r9dv.pdf https://doi.org/10.1029/2018gl078173 |
op_coverage |
7010 - 7018 |
genre |
Antarc* Antarctic Antarctica East Antarctica Totten Glacier |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Totten Glacier |
op_source |
Geophysical Research Letters, vol 45, iss 14 |
op_relation |
qt21c3r9dv https://escholarship.org/uc/item/21c3r9dv https://escholarship.org/content/qt21c3r9dv/qt21c3r9dv.pdf doi:10.1029/2018gl078173 |
op_rights |
CC-BY |
op_doi |
https://doi.org/10.1029/2018gl078173 |
container_title |
Geophysical Research Letters |
container_volume |
45 |
container_issue |
14 |
container_start_page |
7010 |
op_container_end_page |
7018 |
_version_ |
1810495318123347968 |