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首页> 外文会议>SPIE Conference on Remote Sensing of the Atmosphere, Clouds, and Precipitation >Climate change and its impact on drought in Eastern Gansu rainfed agricultural area in Northwest China in the last thirty years
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Climate change and its impact on drought in Eastern Gansu rainfed agricultural area in Northwest China in the last thirty years

机译：最近三十年来甘肃东部甘肃东部雨量农业区干旱气候变化及其影响

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摘要

The monthly precipitation and temperature data, soil moisture data and NDVI data from 1981 to 2010 in Eastern Gansu were used to analyze the temperature, precipitation, soil moisture and drought change in this area. The results show that: 1) The climate in Eastern Gansu appeared a significant warming trend, and the temperature increase was extremely significant in spring, summer, autumn and winter. Among them, the spring temperature increase was the largest with the rate of 0.82 °C/decade. 2) The annual precipitation has experienced a process of high-low-high in the past 30 years. Among them precipitation in spring continued to decrease, while other seasons showed increase tendency in the 21st century after a decline in the last 10 years of the 20th century. 3) The soil moisture in the whole layer (10-100cm) in spring showed a significant downward trend, especially in the surface layer. During the growth season, the water storage capacity of the whole layer of soil decreased significantly. 4) The frequency and extent of drought events in Eastern Gansu experienced a change of low-high-low process. The lowest period of drought occurred in the 1980s and the highest period occurred in the 1990s. The frequency and extent in the first 10 years of this century declined. 5) The spring drought occurred most frequently and strongest intensity in the past 30 years. AVI has a good consistency with CI and soil moisture on the monitoring of drought process, but the volatility is higher.
机译：在甘肃东部1981年至2010年的每月降水量和温度数据，土壤水分数据和NDVI数据用于分析该地区的温度，降水，土壤水分和干旱发生变化。结果表明：1）东甘肃东部气候出现了显着的变暖趋势，春季，夏季，秋季和冬季温度升高极为重要。其中，弹簧温度升高是最大的，速率为0.82°C /十年。 2）年降水量在过去30年中经历过高低的过程。其中春季降水继续下降，而其他季节在20世纪过去10年的下降后显示出21世纪的趋势。 3）弹簧整体层（10-100cm）的土壤水分显示出显着的下降趋势，特别是在表面层中。在成长季期间，整个土壤层的储水能力显着下降。 4）东甘肃东部干旱事件的频率和程度经历了低高低的过程的变化。在20世纪80年代发生了最低的干旱期，并且在20世纪90年代发生了最高的时期。本世纪前10年的频率和程度下降。 5）过去30年来，春季干旱发生了最常见和最强的强度。 AVI在对干旱过程的监测中具有良好的稠度和土壤水分，但波动率较高。

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