OALib Journal期刊
ISSN: 2333-9721
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近35年青藏高原雨量和雨日的变化特征
DOI: 10.11821/xb200809003, PP. 924-930
Keywords: 青藏高原,雨量,雨日,气候变化
Abstract:
利用青藏高原1971-2005年49个气象台站逐日雨量和雨日资料,分析了青藏高原年、季雨量和雨日变化趋势。结果表明,近35年西藏大部分地区年雨量、雨日呈现显著增加趋势,而青海省大部分地区雨量、雨日却呈减少趋势。夏半年,高原上雨日减少,雨量增加,说明降水越来越集中,降水强度在增加。冬半年,高原上雨日、雨量均在增加。高原夏半年小雨(0.1~4.9mm)雨日减少,雨量增加;小雨(5.0~9.9mm)和中雨的雨日和雨量均呈增加趋势,大雨以上的雨日和雨量均减少。冬半年,青藏高原小雪、中雪、大雪不同量级日数和雪日的平均雪量均呈增加趋势;暴雪日和雪量变化均不明显。
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