Drought in Northern Italy: Long Earth Observation Time Series Reveal Snow Line Elevation to Be Several Hundred Meters Above Long-Term Average in 2022
نویسندگان
چکیده
The hydrological drought in Northern Italy 2022 was, large part, the consequence of a snow Italian Alps winter 2021/22 and resulting deficit melt water runoff. In this communication, we assessed snow-cover dynamics nine Alpine catchments using long time series satellite-derived line elevation (SLE) measurements. We compared SLE year to long-term 1985–2021. early 2022, was located several hundred meters above expected median values all catchments. This resulted deficits snow-covered area up 83% Western (catchment Sesia, March 2022) 61% Eastern (Brenta, median. Although data from optical satellite imagery do not contain information about depth content, preliminary qualitative analysis, derived show good agreement with Standardized Snowpack Index (SSPI) which is based on equivalent (SWE). While exact relationships between SLE, SWE, runoff have be explored further catchment basis, long-time may potential for use warning systems.
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ژورنال
عنوان ژورنال: Remote Sensing
سال: 2022
ISSN: ['2315-4632', '2315-4675']
DOI: https://doi.org/10.3390/rs14236091