Seminar by Hannah Besso (University of Washington-Seattle)
Mapping SWE in the western U.S. using quantiles from Snotel and SWE Reanalysis”.
Abstract:
No product currently provides information about snow water equivalent (SWE) at the resolutions, extents, and timing needed by the global hydrology community. Water managers especially would benefit from high-resolution, distributed SWE estimates in real-time, but limited observations and high spatial and temporal variability make SWE difficult to estimate. For example, current-year measurements are often high-resolution but have limited spatial coverage. And products that provide adequate spatial coverage often suffer from issues such as biased precipitation inputs or are produced retroactively such that they are unusable for water resources management.
Perhaps history can bridge the gap between high-resolution point measurements and retrospective gridded products. Recent studies have shown that many regions and years have annual snow accumulation patterns that are repeatable. And climate studies have harnessed the power of historical patterns by bias-correcting products based on temporal distributions. In this dissertation, we will assess three approaches that leverage historical SWE patterns and current-year measurements to estimate spatially distributed SWE at the mountain-range scale. We use SWE Reanalysis products to provide the historical SWE record, as they provide a recent record of high-resolution gridded SWE but lack information about current-year SWE. We will combine these records with various current-year products, including in-situ measurements, Landsat fSCA, ICESat-2 snow depth, and ERA-5 Land precipitation and SWE reanalysis products. This presentation will cover work we have completed and plans for future work on this dissertation.
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The GeoHyd seminars are normally held in Auditorium 1 in the Geology Building, Blindern (map) but it is also possible to follow some of the seminars on Zoom.
Videolink to the lectures will be sent to the e-mail list geohyd-alle@geo and geohyd-info@geo. If you want to subscribe to the geohyd-info@geo mailing list send an email to Anita Sørlie.
About the seminar series
The talks in GeoHyd Lunch Seminar Series are offered by the Section for Geography and Hydrology (GeoHyd), Dept. of Geosciences, University of Oslo. The seminars are announced as lunch seminars so bring your lunch if you want to.
The seminars are open for everyone interested, and especially students are welcome.
The Lunch Seminar Team
– Anita and Chong-Yu