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Validation of the Soil Moisture Active Passive (SMAP) satellite soil moisture retrieval in an Arctic tundra environment
Author(s) -
Wrona Elizabeth,
Rowlandson Tracy L.,
Nambiar Manoj,
Berg Aaron A.,
Colliander Andreas,
Marsh Philip
Publication year - 2017
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2017gl072946
Subject(s) - environmental science , brightness temperature , water content , moisture , satellite , tundra , remote sensing , atmospheric sciences , soil science , brightness , meteorology , arctic , geology , geography , physics , geotechnical engineering , oceanography , engineering , aerospace engineering , optics
This study examines the Soil Moisture Active Passive soil moisture product on the Equal Area Scalable Earth‐2 (EASE‐2) 36 km Global cylindrical and North Polar azimuthal grids relative to two in situ soil moisture monitoring networks that were installed in 2015 and 2016. Results indicate that there is no relationship between the Soil Moisture Active Passive (SMAP) Level‐2 passive soil moisture product and the upscaled in situ measurements. Additionally, there is very low correlation between modeled brightness temperature using the Community Microwave Emission Model and the Level‐1 C SMAP brightness temperature interpolated to the EASE‐2 Global grid; however, there is a much stronger relationship to the brightness temperature measurements interpolated to the North Polar grid, suggesting that the soil moisture product could be improved with interpolation on the North Polar grid.