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Characteristics of agro-meteorological disasters and their risk in Gansu Province against the background of climate change

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Abstract

Gansu Province is a high-incidence area for many meteorological disasters. In this research, using affected and covered risk indices for the main agro-meteorological disasters (drought, flood, wind hail, and frost), the variability characteristics of agro-meteorological disasters were analyzed and the risks calculated based on the information diffusion method against the background of climate change in Gansu Province. The results showed that of affected (crop yield reduced by >10%) and covered (crop yield reduced by >30%) areas for drought and frost tended to increase between 1978 and 2014, whereas those for flood and wind hail tended to decrease. The affected and covered risk indices for drought increased, those for flood and wind hail showed a slight decreasing trend, the frost affected risk index decreased, and the frost covered risk index increased. Comparing the four kinds of risk for agro-meteorological disasters, the estimated risk decreased as the affected and covered risk indices increased. The risk of drought was more serious than those for other agro-meteorological disasters for the same affected risk index, followed by frost, flood, and wind hail. The most serious disaster agro-meteorological covered risk was wind hail, followed by drought, flood, and frost. After a rapid change in temperature in 1994, the estimated affected risk values of drought and frost increased on average by 17.56 and 96.83%, respectively, whereas the estimated risks of flood and wind hail decreased on average by 15.59 and 5.90%, respectively. After the temperature jump, the estimated covered risk of drought increased on average by 19.57%, whereas those of flood, wind hail, and frost decreased on average by 3.02, 1.78, and 26.10%, respectively. These new scientific discoveries are significant for agro-meteorological disaster prevention in Gansu Province.

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Acknowledgements

This study is financially supported by the NSFC (National Natural Science Foundation of China) (Grant No. 41605089, 41630426), the China Special Fund for Meteorological Research in the Public Interest (Major Projects) (GYHY201506001-6), the China Postdoctoral Science Foundation (Grant No. 2015M572666XB), and the Natural Science Foundation of Gansu Province, China (Grant No. 1606RJYA284). The authors thank the Chinese Ministry of Agriculture, which provided the disaster data set. The authors also thank the many students at Lanzhou University who provided assistance with data management. Finally, the authors thank the anonymous reviewers for their helpful comments.

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Authors and Affiliations

  1. Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province, Key Open Laboratory of Arid Change and Disaster Reduction of CMA, Institute of Arid Meteorology, China Meteorological Administration, 2070 East Donggang Road, Lanzhou, 730020, Gansu, China

    Ying Wang, Qiang Zhang, Su-Ping Wang, Jin-Song Wang & Yu-bi Yao

  2. College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China

    Ying Wang

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  1. Ying Wang
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  2. Qiang Zhang
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  3. Su-Ping Wang
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  4. Jin-Song Wang
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Correspondence to Ying Wang.

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Wang, Y., Zhang, Q., Wang, SP. et al. Characteristics of agro-meteorological disasters and their risk in Gansu Province against the background of climate change. Nat Hazards 89, 899–921 (2017). https://doi.org/10.1007/s11069-017-2999-8

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  • DOI: https://doi.org/10.1007/s11069-017-2999-8

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