Inter-Annual Variability in the Antarctic Ice Sheets Using Geodetic Observations and a Climate Model
Quantifying the mass balance of the Antarctic Ice Sheet (AIS), and the resulting sea level rise, requires an understanding of inter-annual variability and associated causal mechanisms. Very few studies have been exploring the influence of climate anomalies on the AIS and only a vague estimate of its...
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2021
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ftdoajarticles:oai:doaj.org/article:a015b85b7fb8470d9b82ee0f533bacab 2023-05-15T13:24:16+02:00 Inter-Annual Variability in the Antarctic Ice Sheets Using Geodetic Observations and a Climate Model Athul Kaitheri Anthony Mémin Frédérique Rémy 2021-06-01T00:00:00Z https://doi.org/10.3390/rs13112199 https://doaj.org/article/a015b85b7fb8470d9b82ee0f533bacab EN eng MDPI AG https://www.mdpi.com/2072-4292/13/11/2199 https://doaj.org/toc/2072-4292 doi:10.3390/rs13112199 2072-4292 https://doaj.org/article/a015b85b7fb8470d9b82ee0f533bacab Remote Sensing, Vol 13, Iss 2199, p 2199 (2021) Antarctic Ice Sheet GRACE Envisat RACMO2.3p2 firn densification model ENSO Science Q article 2021 ftdoajarticles https://doi.org/10.3390/rs13112199 2022-12-30T20:19:06Z Quantifying the mass balance of the Antarctic Ice Sheet (AIS), and the resulting sea level rise, requires an understanding of inter-annual variability and associated causal mechanisms. Very few studies have been exploring the influence of climate anomalies on the AIS and only a vague estimate of its impact is available. Changes to the ice sheet are quantified using observations from space-borne altimetry and gravimetry missions. We use data from Envisat (2002 to 2010) and Gravity Recovery And Climate Experiment (GRACE) (2002 to 2016) missions to estimate monthly elevation changes and mass changes, respectively. Similar estimates of the changes are made using weather variables (surface mass balance (SMB) and temperature) from a regional climate model (RACMO2.3p2) as inputs to a firn compaction (FC) model. Elevation changes estimated from different techniques are in good agreement with each other across the AIS especially in West Antarctica, Antarctic Peninsula, and along the coasts of East Antarctica. Inter-annual height change patterns are then extracted using for the first time an empirical mode decomposition followed by a principal component analysis to investigate for influences of climate anomalies on the AIS. Investigating the inter-annual signals in these regions revealed a sub-4-year periodic signal in the height change patterns. El Niño Southern Oscillation (ENSO) is a climate anomaly that alters, among other parameters, moisture transport, sea surface temperature, precipitation, in and around the AIS at similar frequency by alternating between warm and cold conditions. This periodic behavior in the height change patterns is altered in the Antarctic Pacific (AP) sector, possibly by the influence of multiple climate drivers, like the Amundsen Sea Low (ASL) and the Southern Annular Mode (SAM). Height change anomaly also appears to traverse eastwards from Coats Land to Pine Island Glacier (PIG) regions passing through Dronning Maud Land (DML) and Wilkes Land (WL) in 6 to 8 years. This is indicative of ... Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica DML Dronning Maud Land East Antarctica Ice Sheet Pine Island Pine Island Glacier West Antarctica Wilkes Land Directory of Open Access Journals: DOAJ Articles Amundsen Sea Antarctic Antarctic Peninsula Coats Land ENVELOPE(-27.500,-27.500,-77.000,-77.000) Dronning Maud Land East Antarctica Pacific Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) The Antarctic West Antarctica Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Remote Sensing 13 11 2199 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctic Ice Sheet GRACE Envisat RACMO2.3p2 firn densification model ENSO Science Q |
spellingShingle |
Antarctic Ice Sheet GRACE Envisat RACMO2.3p2 firn densification model ENSO Science Q Athul Kaitheri Anthony Mémin Frédérique Rémy Inter-Annual Variability in the Antarctic Ice Sheets Using Geodetic Observations and a Climate Model |
topic_facet |
Antarctic Ice Sheet GRACE Envisat RACMO2.3p2 firn densification model ENSO Science Q |
description |
Quantifying the mass balance of the Antarctic Ice Sheet (AIS), and the resulting sea level rise, requires an understanding of inter-annual variability and associated causal mechanisms. Very few studies have been exploring the influence of climate anomalies on the AIS and only a vague estimate of its impact is available. Changes to the ice sheet are quantified using observations from space-borne altimetry and gravimetry missions. We use data from Envisat (2002 to 2010) and Gravity Recovery And Climate Experiment (GRACE) (2002 to 2016) missions to estimate monthly elevation changes and mass changes, respectively. Similar estimates of the changes are made using weather variables (surface mass balance (SMB) and temperature) from a regional climate model (RACMO2.3p2) as inputs to a firn compaction (FC) model. Elevation changes estimated from different techniques are in good agreement with each other across the AIS especially in West Antarctica, Antarctic Peninsula, and along the coasts of East Antarctica. Inter-annual height change patterns are then extracted using for the first time an empirical mode decomposition followed by a principal component analysis to investigate for influences of climate anomalies on the AIS. Investigating the inter-annual signals in these regions revealed a sub-4-year periodic signal in the height change patterns. El Niño Southern Oscillation (ENSO) is a climate anomaly that alters, among other parameters, moisture transport, sea surface temperature, precipitation, in and around the AIS at similar frequency by alternating between warm and cold conditions. This periodic behavior in the height change patterns is altered in the Antarctic Pacific (AP) sector, possibly by the influence of multiple climate drivers, like the Amundsen Sea Low (ASL) and the Southern Annular Mode (SAM). Height change anomaly also appears to traverse eastwards from Coats Land to Pine Island Glacier (PIG) regions passing through Dronning Maud Land (DML) and Wilkes Land (WL) in 6 to 8 years. This is indicative of ... |
format |
Article in Journal/Newspaper |
author |
Athul Kaitheri Anthony Mémin Frédérique Rémy |
author_facet |
Athul Kaitheri Anthony Mémin Frédérique Rémy |
author_sort |
Athul Kaitheri |
title |
Inter-Annual Variability in the Antarctic Ice Sheets Using Geodetic Observations and a Climate Model |
title_short |
Inter-Annual Variability in the Antarctic Ice Sheets Using Geodetic Observations and a Climate Model |
title_full |
Inter-Annual Variability in the Antarctic Ice Sheets Using Geodetic Observations and a Climate Model |
title_fullStr |
Inter-Annual Variability in the Antarctic Ice Sheets Using Geodetic Observations and a Climate Model |
title_full_unstemmed |
Inter-Annual Variability in the Antarctic Ice Sheets Using Geodetic Observations and a Climate Model |
title_sort |
inter-annual variability in the antarctic ice sheets using geodetic observations and a climate model |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doi.org/10.3390/rs13112199 https://doaj.org/article/a015b85b7fb8470d9b82ee0f533bacab |
long_lat |
ENVELOPE(-27.500,-27.500,-77.000,-77.000) ENVELOPE(-101.000,-101.000,-75.000,-75.000) ENVELOPE(120.000,120.000,-69.000,-69.000) |
geographic |
Amundsen Sea Antarctic Antarctic Peninsula Coats Land Dronning Maud Land East Antarctica Pacific Pine Island Glacier The Antarctic West Antarctica Wilkes Land |
geographic_facet |
Amundsen Sea Antarctic Antarctic Peninsula Coats Land Dronning Maud Land East Antarctica Pacific Pine Island Glacier The Antarctic West Antarctica Wilkes Land |
genre |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica DML Dronning Maud Land East Antarctica Ice Sheet Pine Island Pine Island Glacier West Antarctica Wilkes Land |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica DML Dronning Maud Land East Antarctica Ice Sheet Pine Island Pine Island Glacier West Antarctica Wilkes Land |
op_source |
Remote Sensing, Vol 13, Iss 2199, p 2199 (2021) |
op_relation |
https://www.mdpi.com/2072-4292/13/11/2199 https://doaj.org/toc/2072-4292 doi:10.3390/rs13112199 2072-4292 https://doaj.org/article/a015b85b7fb8470d9b82ee0f533bacab |
op_doi |
https://doi.org/10.3390/rs13112199 |
container_title |
Remote Sensing |
container_volume |
13 |
container_issue |
11 |
container_start_page |
2199 |
_version_ |
1766378391665115136 |