Abstract
Since the 21st century, the global warming trend has attracted the attention of the general public. Global temperature changes have caused many extremely severe weather events. This paper uses the meteorological data of 20 stations in the Huai River Basin from 1960 to 2017, combined with the historical records of meteorological disasters, and uses the SPI index to analyze the temporal and spatial distribution of meteorological drought. The conclusions are as follows: (1) SPI has a 14a main cycle and 4a, 5a, 6a, 11-12a and 22-24a secondary cycles. (2) The evolution characteristics of SPI show that the annual scale, spring, autumn, and winter increase at different speeds, and decrease in summer.
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Schedule a callMore From: IOP Conference Series: Earth and Environmental Science
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