摘要
以锡林郭勒盟及其周边地区17个气象站点1960年以来的月降水量数据为基础,利用气象学与生态学的学科交叉知识,按气象站点所在地区生态地理区划分割,在Matlab等软件的支持下,用小波分析的方法,研究各生态地理区年降水量的周期性变化规律及各区之间的异同点。研究结果表明,在25～32a时间尺度上,4个区的降水均有较明显的周期信号,降水丰缺均交替出现,但交替年份存在区域差异;根据周期变化的特点可以推断,2007年以后的15a左右时间,锡林郭勒盟及其周边地区降水偏少,气候有进一步旱化的趋势。
This study was based on the precipitation data since 1960 from 17 weather stations in Xilinguole League and related areas.The interdisciplinary knowledge between meteorology and ecology was used and eco-geographical regions were divided according to the meteorological stations.The cycle regularity of precipitation and the difference among the eco-geographical zones were discussed with the aid of wavelet analysis method and Matlab software.Results showed that there was obvious cyclical change of precipitation sequence in Xilinguole League at the inter-annual scale from 1960 to 2007.There was an obvious signal of 25~32 year cycle of annual precipitation in 4 eco-geographical zones,but the periods of lack and abundance precipitation were different among the zones.According to the cycle characteristics,we can infer that in the next 15 years after 2007,Xilinguole League and related areas are in a state of persistent drought.
出处
《水土保持通报》
CSCD
北大核心
2010年第5期46-49,共4页
Bulletin of Soil and Water Conservation
基金
国家自然科学基金项目"气象灾害分布格局与内蒙古草原荒漠化耦合关系研究"(40765006)
"气候旱化与放牧压力作用下草原整体退化机制及其空间分异规律研究"(30970494)
关键词
锡林郭勒草原
生态地理区
气候变化
小波分析
周期性
Xilinguole steppe
eco-geographical zone
climate change
wavelet analysis
cycle regularity
