The Determination of Snow Albedo from Satellite Measurements Using Fast Atmospheric Correction Technique

• Published in: Remote Sensing
• Main Authors: Alexander Kokhanovsky, Jason E. Box, Baptiste Vandecrux, Kenneth D. Mankoff, Maxim Lamare, Alexander Smirnov, Michael Kern
• Format: Text
• Language: English
• Published: Multidisciplinary Digital Publishing Institute 2020
• Subjects: snow characteristics; optical remote sensing; snow albedo; PROMICE; Sentinel 3; OLCI; atmospheric correction; arctic aerosol; Arctic; Greenland; albedo; Ice Sheet
• Online Access: https://doi.org/10.3390/rs12020234

We present a simplified atmospheric correction algorithm for snow/ice albedo retrievals using single view satellite measurements. The validation of the technique is performed using Ocean and Land Colour Instrument (OLCI) on board Copernicus Sentinel-3 satellite and ground spectral or broadband albedo measurements from locations on the Greenland ice sheet and in the French Alps. Through comparison with independent ground observations, the technique is shown to perform accurately in a range of conditions from a 2100 m elevation mid-latitude location in the French Alps to a network of 15 locations across a 2390 m elevation range in seven regions across the Greenland ice sheet. Retrieved broadband albedo is accurate within 5% over a wide (0.5) broadband albedo range of the (N = 4155) Greenland observations and with no apparent bias.