Greenland Ice Sheet solid ice discharge from 1986 through last month: Discharge ...
We present a 1986 through March 2020 estimate of Greenland Ice Sheet ice discharge. Our data include all discharging ice that flows faster than 100 meters per year (m yr−1) and are generated through an automatic and adaptable method, as opposed to conventional handpicked gates. We position gates nea...
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| Format: | Dataset |
| Language: | English |
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NSF Arctic Data Center
2020
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| Online Access: | https://dx.doi.org/10.18739/a2t14tr27 https://arcticdata.io/catalog/view/doi:10.18739/A2T14TR27 |
| Summary: | We present a 1986 through March 2020 estimate of Greenland Ice Sheet ice discharge. Our data include all discharging ice that flows faster than 100 meters per year (m yr−1) and are generated through an automatic and adaptable method, as opposed to conventional handpicked gates. We position gates near the present-year termini and estimate problematic bed topography (ice thickness) values where necessary. In addition to using annual time-varying ice thickness, our time series uses velocity maps that begin with sparse spatial and temporal coverage and end with near-complete spatial coverage and 12 day (d) updates to velocity. The 2010 through 2019 average ice discharge through the flux gates is ∼487±49 gigatonnes per year (Gt yr−1). The 10% uncertainty stems primarily from uncertain ice bed location (ice thickness). We attribute the ∼50 Gt yr−1 differences among our results and previous studies to our use of updated bed topography from BedMachine v3. Discharge is approximately steady from 1986 to 2000, ... |
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