Spatial-Temporal Variation and Mutation of Wind Speed in the Northern and Southern Regions of the Qinling Mountains
Wind speed time series have been subject to far fewer trend analysis than temperature and precipitation records, in part because of data homogeneity issues. However, understanding how evolution of the global climate system has been manifest as changes in near-surface wind regimes in the past and how near-surface wind speed regimes might alter in the future is of great relevance to the insurance industry, the construction and maritime industries, surface energy balance estimation, the community charged with mitigating coastal erosion, the agricultural industry, forest and infrastructure protection communities, and the burgeoning wind energy industry. Based on the temperature and wind speed data between 1960 and 2011 in the northern and southern region of Qinling Mountains, with the methods of Spline interpolation, Pettitt abrupt change point detection as well as correlation analysis, the distribution pattern, spatial and temporal variation of wind speed as well as the possible influential factors were analyzed. The result are as follows: 1) The wind speed presented an pattern which was big in south and low in north, big in east and small in west. According to wind speed, the order was northern and southern region of Qinling Mountains, Han River Basin and Ba-wu Valley , the order of season was spring, winter, summer and autumn. 2) Wind speed decreased significantly in the whole region and different sub-regions during the last 52 years, the decreasing rate in northern slope was the biggest and the smallest one was in the Han River Basin.The order of decreasing rate was winter, spring, autumn and summer. In spring, the wind of 77% stations decreased; In summer, 70% stations decreased, which mainly located in the east and north; In autumn, the increasing and decreasing stations accounted 23% and 77% respectively, but only 9% of them reached significant level, most of them lied in Han River Basin and Ba-wu Valley. In winter, 83% (17%) stations showed downward(upward) trend, 70% of them reached significant level, which distributed evenly in different sub-regions. 3) The annual and seasonal abrupt change happened mainly in 3 periods, which were 1969-1974、 1978-1981 and 1990-1994, the whole region was detected abrupt change in 1981. 4) The development of city construction and change of observational devices had some effect on wind speed change, however, regional current change and global warming were the main reasons for wind speed decreasing.
the northern and southern regions of the Qinling Mountainswind speedspatial-temporal variationsabrupt change pointinfluential factors
NETL
NSTL
万方数据
维普
