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Characteristics of drought in Southern China under climatic warming, the risk, and countermeasures for prevention and control

机译：中国南方气候变暖下的干旱特征，风险及防治对策

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摘要

The temporal and spatial characteristics of drought disasters in Southern China were analyzed by using the daily observation data from 252 meteorological stations and drought disaster data in 14 provinces, autonomous regions, and municipalities of Southern China during 1961-2015. The characteristics of drought disaster risk were determined, and the countermeasures for prevention and control were also suggested. The results showed that the annual precipitation fluctuated and has no obvious linear trend in Southern China in the past 55years. However, the average annual precipitation decreased significantly and its oscillation amplitude is increasing in the early twenty-first century. The annual average temperature exhibited a significant upward trend in these years in the research area. The increasing rate was even higher than the global means. The temperature has increased since 1976, and an abrupt change was occurred in 1997. Area with high risk of drought was concentrated mainly in Southwest China. With the climatic warming, the drought frequency and intensity and the drought-affected areas have been increasing, as well as the risk of drought disaster. The risk area of secondary highest drought disaster expanded dramatically after 1997. In the future, the occurrence of droughts may increase in Southern China. Therefore, it is necessary to enhance risk management for drought disasters by implementing eco-environmental modifications in the vulnerable areas, as well as ensuring food security in the agricultural production areas, addressing the uneven spatial and temporal distributions of water resources and the discrepancy between supply and demand, and enhancing the prevention and control of drought disaster risk.
机译：利用252个气象台站的每日观测数据和1961-2015年华南14个省，自治区和直辖市的干旱灾害数据，分析了华南干旱灾害的时空特征。确定了干旱灾害风险的特征，并提出了防治对策。结果表明，过去55年华南地区年降水量波动较大，没有明显的线性趋势。但是，在二十一世纪初，年平均降水量显着下降，并且其振荡幅度正在增加。这些年来，研究区的年平均温度呈现出明显的上升趋势。增长率甚至高于全球平均水平。自1976年以来温度开始升高，1997年发生了突然的变化。高干旱风险地区主要集中在西南地区。随着气候变暖，干旱频率和强度以及受干旱影响的地区不断增加，干旱风险也随之增加。 1997年之后，次高干旱灾害的风险范围急剧扩大。将来，中国南方的干旱发生率可能会增加。因此，有必要通过对脆弱地区进行生态环境改造，确保农业生产地区的粮食安全，解决水资源时空分布不均以及供给之间的差异，加强干旱灾害风险管理。和需求，加强对干旱灾害风险的预防和控制。

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  • 来源
    《Theoretical and applied climatology》 |2019年第4期|1157-1173|共17页
  • 作者

    Zhang Qiang; Yao Yubi; Wang Ying; Wang Suping; Wang Jinsong; Yang Jinhu; Wang Jing; Li Yiping; Shang Junlin; Li Wenju;

  • 作者单位

    China Meteorol Adm, Inst Arid Meteorol, Key Lab Arid Climat Change & Disaster Reduct, Key Lab Arid Climat Change & Reducing Disaster Ga, Lanzhou 730020, Gansu, Peoples R China;

    China Meteorol Adm, Inst Arid Meteorol, Key Lab Arid Climat Change & Disaster Reduct, Key Lab Arid Climat Change & Reducing Disaster Ga, Lanzhou 730020, Gansu, Peoples R China|Meteorol Bur Dingxi, Dingxi 743000, Peoples R China;

    China Meteorol Adm, Inst Arid Meteorol, Key Lab Arid Climat Change & Disaster Reduct, Key Lab Arid Climat Change & Reducing Disaster Ga, Lanzhou 730020, Gansu, Peoples R China;

    China Meteorol Adm, Inst Arid Meteorol, Key Lab Arid Climat Change & Disaster Reduct, Key Lab Arid Climat Change & Reducing Disaster Ga, Lanzhou 730020, Gansu, Peoples R China|Lanzhou Univ, Coll Atmospher Sci, Lanzhou 730000, Gansu, Peoples R China;

    China Meteorol Adm, Inst Arid Meteorol, Key Lab Arid Climat Change & Disaster Reduct, Key Lab Arid Climat Change & Reducing Disaster Ga, Lanzhou 730020, Gansu, Peoples R China;

    China Meteorol Adm, Inst Arid Meteorol, Key Lab Arid Climat Change & Disaster Reduct, Key Lab Arid Climat Change & Reducing Disaster Ga, Lanzhou 730020, Gansu, Peoples R China|Meteorol Bur Dingxi, Dingxi 743000, Peoples R China;

    China Meteorol Adm, Inst Arid Meteorol, Key Lab Arid Climat Change & Disaster Reduct, Key Lab Arid Climat Change & Reducing Disaster Ga, Lanzhou 730020, Gansu, Peoples R China;

    China Meteorol Adm, Inst Arid Meteorol, Key Lab Arid Climat Change & Disaster Reduct, Key Lab Arid Climat Change & Reducing Disaster Ga, Lanzhou 730020, Gansu, Peoples R China;

    Meteorol Bur Dingxi, Dingxi 743000, Peoples R China;

    Meteorol Bur Dingxi, Dingxi 743000, Peoples R China;

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