Details
| Original language | English |
|---|---|
| Article number | 3956 |
| Journal | Remote sensing |
| Volume | 14 |
| Issue number | 16 |
| Publication status | Published - 15 Aug 2022 |
Abstract
The elastic response of solid earth to glacier and ice sheet melting, the most important consequences of climate change, is a contemporaneous uplift. Here, we use interferometric synthetic aperture radar (InSAR) measurements to detect crustal deformation and mass loss near the Helheim glacier, one of the largest glaciers in southeastern Greenland. The InSAR time series of Sentinel-1 data between April 2016 and July 2020 suggest that there is a maximum cumulative displacement of ~6 cm in the line of sight (LOS) direction from the satellite to the ground near Helheim. We use an exponentially decreasing model of the thinning rate, which assumes that the mass loss starts at the lower-elevation terminal region of the glacier and continues to the higher-elevation interior. A linear inversion of the derived crustal uplift in the vicinity of bedrock using this model for surface loading in an elastic half-space suggests a mass loss of 8.33 Gt/year, which agrees with the results from other studies.
Keywords
- Helheim glacier, InSAR, isostatic rebound, mass loss, Sentinel-1A
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- General Earth and Planetary Sciences
Sustainable Development Goals
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In: Remote sensing, Vol. 14, No. 16, 3956, 15.08.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Inferring Mass Loss by Measuring Contemporaneous Deformation around the Helheim Glacier, Southeastern Greenland, Using Sentinel-1 InSAR
AU - Erfani Jazi, Zohreh
AU - Motagh, Mahdi
AU - Klemann, Volker
N1 - Funding Information: The research of VK contributes to Advanced Earth System Modeling Capacity—ESM (Helmholtz-Association).
PY - 2022/8/15
Y1 - 2022/8/15
N2 - The elastic response of solid earth to glacier and ice sheet melting, the most important consequences of climate change, is a contemporaneous uplift. Here, we use interferometric synthetic aperture radar (InSAR) measurements to detect crustal deformation and mass loss near the Helheim glacier, one of the largest glaciers in southeastern Greenland. The InSAR time series of Sentinel-1 data between April 2016 and July 2020 suggest that there is a maximum cumulative displacement of ~6 cm in the line of sight (LOS) direction from the satellite to the ground near Helheim. We use an exponentially decreasing model of the thinning rate, which assumes that the mass loss starts at the lower-elevation terminal region of the glacier and continues to the higher-elevation interior. A linear inversion of the derived crustal uplift in the vicinity of bedrock using this model for surface loading in an elastic half-space suggests a mass loss of 8.33 Gt/year, which agrees with the results from other studies.
AB - The elastic response of solid earth to glacier and ice sheet melting, the most important consequences of climate change, is a contemporaneous uplift. Here, we use interferometric synthetic aperture radar (InSAR) measurements to detect crustal deformation and mass loss near the Helheim glacier, one of the largest glaciers in southeastern Greenland. The InSAR time series of Sentinel-1 data between April 2016 and July 2020 suggest that there is a maximum cumulative displacement of ~6 cm in the line of sight (LOS) direction from the satellite to the ground near Helheim. We use an exponentially decreasing model of the thinning rate, which assumes that the mass loss starts at the lower-elevation terminal region of the glacier and continues to the higher-elevation interior. A linear inversion of the derived crustal uplift in the vicinity of bedrock using this model for surface loading in an elastic half-space suggests a mass loss of 8.33 Gt/year, which agrees with the results from other studies.
KW - Helheim glacier
KW - InSAR
KW - isostatic rebound
KW - mass loss
KW - Sentinel-1A
UR - http://www.scopus.com/inward/record.url?scp=85137824633&partnerID=8YFLogxK
U2 - 10.3390/rs14163956
DO - 10.3390/rs14163956
M3 - Article
AN - SCOPUS:85137824633
VL - 14
JO - Remote sensing
JF - Remote sensing
SN - 2072-4292
IS - 16
M1 - 3956
ER -