According to the monthly temperature observation data of each conventional meteorological station in Heihe River basin set up by China Meteorological Administration, the annual air freeze-thaw index of each meteorological station is calculated, and then the annual average value of 1960-2004 is obtained. Finally, based on the regression relationship between the multi-year mean value of air freeze-thaw index and altitude of each meteorological station, and with the aid of 1 km DEM data, the spatial distribution map of air freeze-thaw index in Heihe River Basin is constructed.

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Zhang, T. (2014). Freezing/ thawing index for air in the Heihe River Basin. A Big Earth Data Platform for Three Poles, DOI: 10.3972/heihe.099.2014.db. CSTR: 18406.11.heihe.099.2014.db. (Download the reference： RIS | Bibtex )

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