SPI - Standardized Precipitation Index from CRU / ECAD for EU and USA
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The "Standardized Precipitation Index" (SPI) is used to describe extremely dry or wet climate situations. The World Meteorological Organization (WMO) recommends,...
“标准化降水指数（Standardized Precipitation Index，SPI）”可用于描述极端干旱或湿润的气候状况。世界气象组织（World Meteorological Organization，WMO）对此予以推荐……
