Monitoring Seasonal Fluctuation and Long‐Term Trends for the Greenland Ice Sheet Using Seismic Noise Auto‐Correlations
Abstract One important feature of the Greenland Ice Sheet (GrIS) change is its strong seasonal fluctuation. Taking advantage of deployed seismographic stations in Greenland, we apply cross‐component auto‐correlation of seismic ambient noise to measure in‐situ near surface relative velocity change (d...
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| Format: | Article |
| Language: | English |
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Wiley
2023-04-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2022GL102146 |
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| author | Bingxu Luo Shuo Zhang Hejun Zhu |
| author_facet | Bingxu Luo Shuo Zhang Hejun Zhu |
| author_sort | Bingxu Luo |
| collection | DOAJ |
| description | Abstract One important feature of the Greenland Ice Sheet (GrIS) change is its strong seasonal fluctuation. Taking advantage of deployed seismographic stations in Greenland, we apply cross‐component auto‐correlation of seismic ambient noise to measure in‐situ near surface relative velocity change (dv/v) in different regions of Greenland. Our results demonstrate that dv/v measurements for most stations have less than 3 months lag times in comparison to the surface mass change. These various lag times may provide us constraints for the thickness of the subglacial till layer over different regions in Greenland. Moreover, in southwest Greenland, we observe a change in the long‐term trend of dv/v for three stations, which might be consistent with the mass change rate (dM/dt) due to the “2012–2013 warm‐cold transition.” These observations suggest that seismic noise auto‐correlation technique may be used to monitor both seasonal and long‐term changes of the GrIS. |
| format | Article |
| id | doaj-art-57ab3bc34c7f443e85f030b0f6c208db |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2023-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-57ab3bc34c7f443e85f030b0f6c208db2025-08-20T03:12:52ZengWileyGeophysical Research Letters0094-82761944-80072023-04-01507n/an/a10.1029/2022GL102146Monitoring Seasonal Fluctuation and Long‐Term Trends for the Greenland Ice Sheet Using Seismic Noise Auto‐CorrelationsBingxu Luo0Shuo Zhang1Hejun Zhu2Department of Geosciences The University of Texas at Dallas Richardson TX USADepartment of Geosciences The University of Texas at Dallas Richardson TX USADepartment of Geosciences The University of Texas at Dallas Richardson TX USAAbstract One important feature of the Greenland Ice Sheet (GrIS) change is its strong seasonal fluctuation. Taking advantage of deployed seismographic stations in Greenland, we apply cross‐component auto‐correlation of seismic ambient noise to measure in‐situ near surface relative velocity change (dv/v) in different regions of Greenland. Our results demonstrate that dv/v measurements for most stations have less than 3 months lag times in comparison to the surface mass change. These various lag times may provide us constraints for the thickness of the subglacial till layer over different regions in Greenland. Moreover, in southwest Greenland, we observe a change in the long‐term trend of dv/v for three stations, which might be consistent with the mass change rate (dM/dt) due to the “2012–2013 warm‐cold transition.” These observations suggest that seismic noise auto‐correlation technique may be used to monitor both seasonal and long‐term changes of the GrIS.https://doi.org/10.1029/2022GL102146auto‐correlationrelative velocity changeGreenland Ice Sheet |
| spellingShingle | Bingxu Luo Shuo Zhang Hejun Zhu Monitoring Seasonal Fluctuation and Long‐Term Trends for the Greenland Ice Sheet Using Seismic Noise Auto‐Correlations Geophysical Research Letters auto‐correlation relative velocity change Greenland Ice Sheet |
| title | Monitoring Seasonal Fluctuation and Long‐Term Trends for the Greenland Ice Sheet Using Seismic Noise Auto‐Correlations |
| title_full | Monitoring Seasonal Fluctuation and Long‐Term Trends for the Greenland Ice Sheet Using Seismic Noise Auto‐Correlations |
| title_fullStr | Monitoring Seasonal Fluctuation and Long‐Term Trends for the Greenland Ice Sheet Using Seismic Noise Auto‐Correlations |
| title_full_unstemmed | Monitoring Seasonal Fluctuation and Long‐Term Trends for the Greenland Ice Sheet Using Seismic Noise Auto‐Correlations |
| title_short | Monitoring Seasonal Fluctuation and Long‐Term Trends for the Greenland Ice Sheet Using Seismic Noise Auto‐Correlations |
| title_sort | monitoring seasonal fluctuation and long term trends for the greenland ice sheet using seismic noise auto correlations |
| topic | auto‐correlation relative velocity change Greenland Ice Sheet |
| url | https://doi.org/10.1029/2022GL102146 |
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