Decreasing relative humidity dominates a reversal of decreasing pan evaporation in mainland China after 1989
Decreasing relative humidity dominates a reversal of decreasing pan evaporation in mainland China after 1989
复制标题
1989年后,相对湿度的下降主导了中国大陆蒸发皿蒸发量下降的逆转
DOI:
10.1016/j.jhydrol.2022.127641
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发表时间:
2022-02
影响因子:
6.4
通讯作者:
Zhenzhong Zeng
中科院分区:
文献类型:
--
作者:
Yubin Jin;Dashan Wang;Yu Feng;Jie Wu;Wenhui Cui;Xinyue He;Aifang Chen;Zhenzhong Zeng
Pan evaporation (Epan) reflects the evaporation potential of surface water and is a key indicator of atmospheric evaporative demand. Previous studies have found a substantial decrease in Epanacross China, dominated by declining wind speed and solar radiation before the late 2000 s. However, how Epanresponds to the recovery of wind speed and solar radiation since the late 2000 s remains unclear. Here, we investigate the spatial and temporal patterns of Epanand analyze its controlling factors, based on the daily meteorological observations during 1965–2018 at 2,018 stations over China. We find that the annual Epanin the northwest and south of China is higher than that in the northeast and central parts of China. The national mean Epandecreases significantly during 1965–1989 at a rate of −6.57 mm yr−2, then reverses at a rate of 4.58 mm yr−2. Distinct seasonal discrepancies and geographical heterogeneities in Epantrends are observed. Declining wind speed mainly contributes to the decrease in Epanbefore 1989, while relative humidity is shown as the dominant factor that drives the growth of Epanafter the turning point. The recovery of wind speed still has significant impact on Epanvariation in parts of China, while Epanis only mainly affected by solar radiation in parts of central China in autumn. Our findings highlight the importance of understanding Epanvariations and driving factors, and call for precautions and adaptation actions to combat and prevent flash droughts over China, especially in the south of China.
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DOI:
10.1002/2016jd025166
发表时间:
2016-07
期刊:
Journal of Geophysical Research - D: Atmospheres
影响因子:
--
作者:
Wenbin Liu;Fubao Sun
通讯作者:
Fubao Sun
影响因子:
--
作者:
Yafang Song;Yanju Liu;Yihui Ding
通讯作者:
Yafang Song;Yanju Liu;Yihui Ding
影响因子:
4.6
作者:
Wang L;Yuan X;Xie Z;Wu P;Li Y
通讯作者:
Li Y
影响因子:
3.1
作者:
M. Roderick;M. Hobbins;G. Farquhar
通讯作者:
M. Roderick;M. Hobbins;G. Farquhar
影响因子:
3.8
作者:
J. Otkin;Martha C. Anderson;C. Hain;I. Mladenova;J. Basara;M. Svoboda
通讯作者:
J. Otkin;Martha C. Anderson;C. Hain;I. Mladenova;J. Basara;M. Svoboda