长岭县近60年干旱特征分析  

Analysis of Drought Charateristics in Changling County during the past 60 Years

作　　者：高峰[1] 辛文春 GAO Feng;XINWenchun(Songyuan Meteorological Bureau Songyuan,Jilin 138000;Songyuan Academy of Agricultural Sciences Songyuan,Jilin 138000)

机构地区：[1]松原市气象局,吉林松原1380000 [2]松原市农业科学院,吉林松原138000

出　　处：《现代农业研究》2024年第11期108-111,共4页Modern Agriculture Research

摘　　要：本文使用1961—2020年逐日基础气象资料,采用FAO Penman-Monteith计算参考作物蒸散量ET0,根据农业干旱等级国标计算作物水分亏缺指数CWDI及作物水分亏缺距平指数CWDI_(a),根据作物水分亏缺距平指数CWDI_(a)干旱等级标准及玉米干旱灾害风险评价方法计算玉米生产5~9月逐旬干旱、轻旱、中旱、重旱、特旱发生频率,对5~9月干旱发生规律及干旱年代际变化规律进行分析。结果表明,作物生长季5~9月轻旱、中旱、重旱发生频率多在10%以下,出现频率较低,特旱发生频率最高。特旱及干旱在6月上中旬、9月上中旬出现两个峰值,6月下旬至8月下旬干旱发生频率作物生长季最低。2001—2010年轻旱、中旱、重旱、特旱及干旱发生频率最高,2011—2020年干旱发生频率最低。9月轻旱有随年代际增加趋势,7月中旬至8月中旬中旱有随年代际增加趋势,重旱各年代5月上中旬、8月下旬至9月中旬维持较高发生频率。特旱各年代都维持较高发生频率,7月中旬至8月下旬特旱有随年代际增加趋势。Based on the daily observation data of Changling during 1961-2020,the FAO Penman-Monteith method was applied to calculate the reference crop evapotranspiration ET_(0).Calculated crop water deficit index CWDI and crop water deficit anomaly index CWDI_(a) according to the national standard of agricultural drought grade,calculated the frequency of drought,light drought,moderate drought,heavy drought and extreme drought in maize production every ten da和ys from May to September based on crop water deficit anomaly index,drought grade standard and drought disaster risk assessment method,This research systematically analyzes the occurrence regularity of drought from May to September in 60 years.The results showed that the frequency of light drought,moderate drought and heavy drought was less than 10% in May and September,and the frequency of extreme drought was the highest.Extreme drought and drought appeared two peaks in the early mid of June and early mid of September,The frequency of drought from end of June to end of August is the lowest in the growing season.The frequency of light drought,moderate drought,heavy drought,extreme drought and drought was the highest in 2001-2010,and the frequency of drought was the lowest in 2011-2020.The light drought in September showed an increasing trend with the years,The moderate drought from mid of July to mid of August has an increasing trend with the years,The frequency of heavy drought keeped higher in early mid May and from end of August to mid of September.The frequency of extreme drought keeped higher in all years and The frequency of extreme drought from mid of July to end of August keeped an increasing trend.

关 键 词：参考作物蒸散量 干旱 作物水分亏缺指数 作物水分亏缺距平指数 

分 类 号：P467[天文地球—大气科学及气象学]