干旱区地理2017，Vol.40Issue(5)：933-941,9.
城市化对云南高原楚雄市近年来雨岛效应的影响研究
Influence of urbanization on urban rain island effect of Chuxiong City on Yunnan Plateau in recent years
摘要
Abstract
Although many studies on urban rain island have been carried out,but mainly focusing on large cities such as Beijing,Shanghai,Lanzhou,Urumqi,and Kunming,the studies on small and medium-sized cities and comparison between cities and adjacent suburbs are few.With the fast development,the impact of urbanization development in ecologically weak area on regional climate draws much concern in recent years.Chuxiong City,located in the middle part of the Yunnan Plateau,belonging to South Asia monsoon zone,is very vulnerable to climate and suffers frequent natural disasters in recent years.Nowadays,the establishment of many encryption weather stations in Chuxiong City and its suburbs since 2010 enhances reliability of data.Based on the 6-year meteorological data of 10 weather stations in Chuxiong and social statistic data,this paper made comparison analysis of the spatial-temporal distribution of rain island between Chuxiong City and its suburbs,and discussed the mechanism of the comparison result by using grey relational analysis method.The results show that the minimum precipitation appeared in 2012,and the maximum precipitation appeared in 2015.Generally,6-year average precipitation was less than the multi-year average.Rain island intensity in Chuxiong presented the trend of decreasing first and then increasing.The maximum rain island intensity appeared in 2010 (218.0 mm),and the minimum rain island intensity appeared in 2012 (0.1 mm).Seasonally,the maximum rain island intensity appeared in September (25.0 mm),and the minimum rain island intensity appeared in February (0.0 mm).Besides,rain island intensity in rainy season (19.0 mm) was greater than that in dry season (10.0 mm);the days of total precipitation in Chuxiong City was greater than those in its suburbs.The rain island effect was especially obvious in light rain and moderate rain,but weak in heavy rain and unobvious in rainstorm.Spatially,rain island intensity mostly appeared in Chuxiong City and its leeward Cangling station due to the development of city,heat island effect,barrier effect of city,and increasing condensation nucleus of city.Through grey relational analysis,the most remarkable humanity factor that affected the rain island intensity in Chuxiong was urban built-up area;the most remarkable natural factor that affected the rain island intensity in Chuxiong was sunshine duration.The significance of humanity factor was greater than the significance of natural factor,indicating that urbanization is a main factor for accelerating rain island intensity in Chuxiong City.Conclusions in this paper can contribute to the disaster prevention and reduction,and sustainable development in Chuxiong.关键词
楚雄市/城市化/区域降水/雨岛效应/城郊对比Key words
Chuxiong City/urbanization/regional precipitation/rain island effect/comparison between the cities and suburbs分类
天文与地球科学引用本文复制引用
何萍,江艳萍,李矜霄,张清艳..城市化对云南高原楚雄市近年来雨岛效应的影响研究[J].干旱区地理,2017,40(5):933-941,9.基金项目
国家自然科学基金项目(41465001) （41465001）
