Abstract
AbstractUsing global Sentinel-1 radar backscatter data, we systematically map the locations of glaciers with surge-type activity during 2017–22. Patterns of pronounced increases or decreases in the strongest backscatter between two winter seasons often indicate large changes in glacier crevassing, which we treat here as a sign of surge-type activity. Validations against velocity time series, terminus advances and crevassing found in optical satellite images confirm the robustness of this approach. We find 115 surge-type events globally between 2017 and 2022, around 100 of which on glaciers already know as surge-type. Our data reveal a pronounced spatial clustering in three regions, (i) Karakoram, Pamirs and Western Kunlun Shan (~50 surges), (ii) Svalbard (~25) and (iii) Yukon/Alaska (~9), with only a few other scattered surges elsewhere. This spatial clustering is significantly more pronounced than the overall global clustering of known surge-type glaciers. The 2017–22 clustering may point to climatic forcing of surge initiation.
Publisher
Cambridge University Press (CUP)
Reference52 articles.
1. RGI-Consortium (2017) Randolph Glacier Inventory version 6. GLIMS Technical Report. Available at https://nsidc.org/sites/nsidc.org/files/technical-references/RGI_Tech_Report_V6.0.pdf
2. A new inventory of High Mountain Asia surge-type glaciers derived from multiple elevation datasets since the 1970s;Guo;Earth System Science Data Discussions,2022
3. More dynamic than expected: an updated survey of surging glaciers in the Pamir
4. Google Earth Engine: Planetary-scale geospatial analysis for everyone
5. Surge-Type Glaciers in the Tien Shan (Central Asia)
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