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Abstract. Dynamic changes of marine-terminating outlet glaciers are projected to beresponsible for about half of future ice loss from the Greenland Ice Sheet.However, we lack a unified, process-based understanding that can explain theobserved dynamic changes of all outlet glaciers. Many glaciers undergoseasonal dynamic thickness changes, and classifying the patterns of seasonalthickness change can improve our understanding of the processes that driveglacier behavior. The Ice, Cloud and land Elevation Satellite-2 (ICESat-2)provides space-based, seasonally repeating altimetry measurements of the icesheets, allowing us to quantify near-termini seasonal dynamic thicknesspatterns of 37 outlet glaciers around the Greenland Ice Sheet. We classifythe glaciers into seven common patterns of seasonal thickness change over a2-year period from 2019 to 2020. We find small groupings of neighboringglaciers with similar patterns of seasonal thickness change, but, within largersectors of the ice sheet, patterns of seasonal thickness change are mostlyheterogeneous. Future studies can build upon our results by extending thesetime series, comparing seasonal dynamic thickness changes with externalforcings, such as ocean temperature and meltwater runoff, and with otherdynamic variables such as seasonal glacier velocity and terminus positionchanges.

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Brief communication: Preliminary ICESat-2 (Ice, Cloud and land Elevation Satellite-2) measurements of outlet glaciers reveal heterogeneous patterns of seasonal dynamic thickness change