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Spatiotemporal Characteristics of Meteorological and Agricultural Droughts in China: Change Patterns and Causes

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  • Lusheng Li

    (School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450046, China)

  • Lili Zhao

    (School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450046, China)

  • Yanbin Li

    (School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450046, China)

Abstract

Drought is complex and is also one of the main disasters affecting China. Exploring the response of agricultural drought and meteorological drought to climatic factors helps us to understand the causes of drought. In this paper, we evaluated the temporal and spatial characteristics of soil drought and meteorological drought (SMD) and explored their responses to climatic factors and latent heat fluxes (LHF), and then explained their variation from the perspective of atmospheric circulation. The following results were obtained. (1) Meteorological drought has gradually increased in the Liaohe River Basin, on the North China Plain, and on the Loess Plateau while average soil moisture has been maintained at only approximately 25%. The impacts of drought are very serious in these regions. (2) LHF response to short time-scale (3-month scale) drought performance is high in the dry season, and the regions with high correlation coefficients are spatially distributed and concentrated in the monsoon climate zone. The regions with high correlation coefficients between drought and LHFs on long time scales (12-month scale) are concentrated in the coastal basin of southeast China. (3) Short- and long-term SMDs showed highly responsive and significant relationships with PDO, showing variations in the southeast coastal basin, the Pearl River basin, the northwest inland basin and the eastern part of the Heilongjiang basin, with a maximum correlation coefficient of 0.21 ( p < 0.01). The short-term SMD in the northwestern inland region was significantly negatively correlated with AMO (correlation coefficient of −0.19, p < 0.01). the Nino3.4 index is significantly positively correlated with the SMD in the southeast coastal region of China, with a maximum correlation coefficient of 0.23 ( p < 0.01). The decrease in convective precipitation led to a stronger association between soil and meteorological drought and climatic factors. This study helps to reveal the changing patterns of SMDs and can also be used globally to identify the local development patterns of drought under climate change.

Suggested Citation

  • Lusheng Li & Lili Zhao & Yanbin Li, 2023. "Spatiotemporal Characteristics of Meteorological and Agricultural Droughts in China: Change Patterns and Causes," Agriculture, MDPI, vol. 13(2), pages 1-16, January.
    • Handle: RePEc:gam:jagris:v:13:y:2023:i:2:p:265-:d:1043351
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    References listed on IDEAS

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    1. Jakob Zscheischler & Seth Westra & Bart J. J. M. Hurk & Sonia I. Seneviratne & Philip J. Ward & Andy Pitman & Amir AghaKouchak & David N. Bresch & Michael Leonard & Thomas Wahl & Xuebin Zhang, 2018. "Future climate risk from compound events," Nature Climate Change, Nature, vol. 8(6), pages 469-477, June.
    2. Zhang, Yu & Hao, Zengchao & Feng, Sifang & Zhang, Xuan & Xu, Yang & Hao, Fanghua, 2021. "Agricultural drought prediction in China based on drought propagation and large-scale drivers," Agricultural Water Management, Elsevier, vol. 255(C).
    3. Jakob Zscheischler & Seth Westra & Bart J. J. M. Hurk & Sonia I. Seneviratne & Philip J. Ward & Andy Pitman & Amir AghaKouchak & David N. Bresch & Michael Leonard & Thomas Wahl & Xuebin Zhang, 2018. "Author Correction: Future climate risk from compound events," Nature Climate Change, Nature, vol. 8(8), pages 750-750, August.
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