Spatial distribution of hot days in north central region, Vietnam in the period of 1980-2013

Based on the data of daily maximum temperature of 26 meteorological stations in the North Center Region, Vietnam over the period of 1980-2013, the authors conducted the research on spatial distribution of the number of hot days. The initial result shows that in general, in the north of the study area, the large number of hot days occurred in the plain, the hot days tend to decrease moving from the plain to the west and the east. In the south, the number tends to increase from the west to the east. Especially, the largest number occurred in two areas: Ma and Ca Rivers valleys (Thanh Hoa and Nghe An provinces) and coastal areas (Thua Thien Hue province) creating two hot centers in Tuong Duong district (Nghe An province) and Nam Dong district (Thua Thien Hue province).