Relationship between climate factors in Northwest China and the sandstorm in Beijing
Based on the observational data from meteorological stations in Northwest and Beijing’s sandstorm information, the climate influence index D was modified according to the climate conditions in Northwest China, and the relationship of climate influence index D in Northwest and sandstorm occurrences in Beijing was analysed. The results showed that: From 2001 to 2010, the sandstorm occurrences days in Beijing was over 30days in 2001, 2002 and 2006, which was effected by the sandstorm process in China, and the sandstorm occurrences days was 39 in 2001. The annual average of high values of indexD in Northwest were located in Basin and Desert region, and during the spring period, the average of D value was the highest in the four season, the value was 2.0, followed by the winter, the value was 0.9, the summerD value was 0.8 and the autumn was 0.59. The correlation analysis of indexD and the sandstorm occurrence shows that, the average correlation coefficient in Ningxia was 0.84, Gansu was 0.82, Shanxi was 0.81, Qinghai was 0.78, Xinjiang was 0.74, Inner-Mongolia was 0.72. The sandstorm from northwest pathway and north pathway were greater impact on Beijing’s sandstorm occurrence, the correlation shows a significant positive relationship between the indexD of the border zone of Maowusu Desert, the Loess Plateau and Hunshandake Sandland with Beijing’s sandstorm, the correlation coefficient was 0.9, the climate of these areas had a significant effect on the occurrence of sandstorm in Beijing.
Northwest Chinaclimate factorthe sandstormthe climate influence index
NETL
NSTL
万方数据
维普
