Subjects: Geosciences >> Atmospheric Sciences submitted time 2023-12-16 Cooperative journals: 《干旱区研究》
Abstract： This study used the Sen+M-K trend analysis, the gravity center movement model, the standardizedregression coefficient, and the spatial clustering methods to reveal the spatial characteristics of the variation,trends, and movement of dust days of various types and the contribution rate of their influencing factors in theTarim Basin based on the annual data of 32 meteorological stations between 1964 and 2022. The resultsindicated: (1) Floating dust, followed by blowing sand and sandstorms, dominate the Tarim Basin, showing aspatial distribution pattern of more in the south and less in the north, and the dust days of various types showsignificantly decreasing trends. (2) The gravity centers of dust days of various types in the Tarim Basin tended tomove southeast, and the gravity center of sandstorm days moved the most. (3) Warmer temperatures, lower windspeeds, and fewer gale days were the main factors in the decreased dust days in the Tarim Basin, whereasprecipitation had the least influence. (4) The high contribution rates of precipitation to dust days are clustered inthe western part of the Tarim Basin, mean temperature and mean maximum temperature in the southern andwestern parts, respectively, and gale days and mean wind speed in the northwestern and southeastern parts,respectively. This study’s results can provide a scientific basis for developing regionally applicable windbreakingand sand-fixing measures in the Tarim Basin.
Subjects: Geosciences >> Geography submitted time 2021-06-13 Cooperative journals: 《干旱区研究》
Abstract： 中巴经济走廊是“一带一路”倡议的重要组成部分，深入认识该地区气候变化时空分布特征和规律，对于项目顺利实施和安全保障有重大意义。采用CRU TSv4.04逐月地面气候要素数据集，分析1980—2019年中巴经济走廊地区气温、降水、干湿状况的气候变化时空分布特征。结果表明：中巴经济走廊地区气温呈显著上升趋势，中部地区增温速率低于两端地区，最低温度增温速率最快，为0.37 ℃·(10a)-1；平均气温次之，增温速率为0.32 ℃·(10a)-1；最高温度增温速率最慢，为0.29 ℃·(10a)-1。降水量、降水日数与干湿变化的区域性差异较大，其中巴基斯坦西南部降水量显著减少，最大速率为-20 mm·(10a)-1，变干趋势明显；巴基斯坦中部地区降水日数显著增加，最大速率为4 d·(10a)-1。
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