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The International Soil Moisture Network (ISMN) is a new data‐hosting center where globally available ground‐based soil moisture measurements are collected, harmonized, and made available to users through a Web interface ( http://www.ipf.tuwien.ac.at/insitu ). As the first international initiative of its kind, the ISMN will play a crucial role in globally assessing the quality of soil moisture estimates from spaceborne microwave sensors and land surface models; in uncovering how the hydrological cycle integrates with land, the atmosphere, and the ocean; and in studying climate change. The ISMN is fully operational and currently hosts soil moisture data from more than 500 stations spanning 18 different networks. For scientific use, access to the data is free of charge.
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Dorigo et al. (2011) studied this question.
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