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has been cited by the following article:

• TITLE: Temporal Dynamics of Standardized Precipitation Evapotranspiration Index and Its Influence to Summer Maize Yield from Kaifeng Region in He’nan Province

  AUTHORS: Kunyu Peng, Jianfeng Peng

  KEYWORDS: SPEI, Dry/Wet Periods, Maize Yield, Correlation Analysis, Kaifeng Region

  JOURNAL NAME: Journal of Geoscience and Environment Protection, Vol.5 No.12, December 18, 2017

  ABSTRACT: Many quantitative studies get more and more attention on drought occurrence and monitoring trends of drought change using different methods; however few studies involve correlation between drought and crop yield especially drought index. This study analyzed the climate change about annual mean SPEI-3, SPEI-6 and SPEI-12, of Kaifeng region in the period of 1961-2013. The SPEI-3 and SPEI-6 seasonal short timescales showed a decreasing tendency, especially rapidly a decline since 2004, and high-frequency alternate dry/wet periods occurred during 1961-2013. However, the annual timescale SPEI-12 showed almost no evidently rise/decline tendency but severity events of dry/wet episode aggravated in terms of duration and magnitude and remarkable low-frequency change. Correlation analysis results between maize yield from Kaifeng region and multi-month scale annual SPEI showed a high negative significant correlation with -0.689 (ρ ρ