摘要
基于1962—2016年滇中地区37个气象站点6—9月降水资料,通过计算长、短周期旱涝急转指数,研究滇中地区夏季旱涝急转时空特征。结果表明:滇中地区夏季旱涝急转以干旱转雨涝为主,自20世纪90年代以来旱涝急转较频繁;长、短周期6—7月和8—9月旱涝急转均存在时间尺度为10—20a的周期变化,未来几年仍将处于干旱转雨涝时段;旱涝急转显著增长趋势的空间分布呈分散性;长周期旱涝急转呈自西南向东北递减的空间分布,短周期7—8月旱涝急转空间分布最广。
Based on the precipitation data of 37 meteorological stations from June to September during 1962 to 2016,the long-cycle and short-cycle drought-flood abrupt alternation(LDFA and SDFA)index were defined to quantitative investigate the temporal and spatial char acteristics of drought-flood abrupt alternation(DFA)in the central Yunnan. The results showed that drought to flood(DTF)events were the main performance of the summer DFA in recent 55 years. And since the1990 s,the summer DFA has been frequent in central Yunnan. There were periodic changes with time scale of 10-20 a in the LDFA and the SDFA of June to July and August to September,more importantly,the next few years would be continued the DTF events. In addition,the spatial distribution of the significant growth trend of DFA was scattered. The LDFA showed a decreasing spatial distribution from southwest to northeast,while the SDFA of July to August was the most widespread.
作者
赵琳
何萍
ZHAO lin;HE Ping(College of Management Science and Engineering,Baise University,Baise 533000,China;College of Geography and Tourism Management,Chuxiong Normal University,Chuxiong 675000,China)
出处
《资源开发与市场》
CAS
2020年第8期823-828,共6页
Resource Development & Market
基金
国家自然科学基金项目(41465001)。
关键词
旱涝急转
时空特征
滇中地区
drought-flood abrupt alternation
temporal-spatial characteristics
the central Yunnan
作者简介
第一作者:赵琳(1996-),女,瑶族,广西壮族自治区金秀人,硕士,讲师,主要从事气象、气候与自然地理综合研究;通讯作者:何萍(1965-),女,重庆市人,教授,硕士生导师,主要从事气象、气候与自然地理综合研究。
