1.Freezing/ thawing index for air in the Heihe River Basin

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.

ZHANG Tingjun

   POLES TPDC HEIHE

doi: 10.3972/heihe.099.2014.db 8688 449 Open Access 2020-09-15