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基于彭曼公式日均值时序分析的中国蒸发能力动态成因
Authors
杨筱筱
桂发亮
+4 more
白桦
穆兴民
高鹏
鲁向晖
Publication date
1 January 2019
Publisher
Abstract
蒸发能力是全球气候变化背景下水资源管理和水灾害防治的靶向性指标,其动态成因分析集中于年尺度,可靠性需多尺度验证。本文基于中国819 个气象站1961—2015 年的逐日数据,利用时间序列分析方法挖掘年潜在蒸发量趋势和突变; 提出彭曼公式全微分日求积方法,计算年均日潜在蒸发量变化的气象要素累积贡献率,甄别区域驱动因子和成因。经分析,各站年潜在蒸发量倾向率均值为-3.3 mm/(10a) ,东西部为负值、中部为正值; 各站年潜在蒸发量突变年份均值为1987 年; 东部潜在蒸发量减少由地表净辐射量减少所致,相应区域累积贡献率为280;西部潜在蒸发量减少由相对湿度增加所致,相应区域累积贡献率为175; 中部潜在蒸发量增加由温度和风速增加所致,相应区域累积贡献率分别为355 和121。</p
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Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources
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Last time updated on 12/01/2021