HSAF Snow EW 2021

xx Minutes

Niilo Siljamo (FMI)

Snow detectionfor flatland (snow mask) by VIS/NIR of AVHRR (H32), Effective snow cover by VIS/IR radiometry (H35) (using products from juypiter notebook) - Part I

Published: 2 December 2021

H32 is a global daily snow mask product, which is retrieved from the Advanced Very-High Resolution Radiometer (AVHRR) onboard the polar orbiting MetOp satellites operated by EUMETSAT. Metop/AVHRR provides daily global coverage on 5 channels. The spatial resolution is 1.1 km in nadir. The snow cover retrieval algorithm used in the product is based on empirical approach which takes into account the highly variable nature of the snowcovered surface in satellite resolution. Validation results based on weather station observations (snow depth and the state of the ground observations) are very good.

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