干旱区生态环境知识资源中心(Arid): Precipitation recycling using a new evapotranspiration estimator for Asian-African arid regions

Arid

DOI	10.1007/s00704-019-03063-9
	Precipitation recycling using a new evapotranspiration estimator for Asian-African arid regions
	Li, Ruolin 1,2; Wang, Chenghai 2
通讯作者	Wang, Chenghai
来源期刊	THEORETICAL AND APPLIED CLIMATOLOGY
ISSN	0177-798X
EISSN	1434-4483
出版年	2020
卷号	140 期号:1-2 页码:1-13
英文摘要	Local moisture recycling (precipitation recycling) plays a crucial role in precipitation. However, evapotranspiration, the key to precipitation recycling, is difficult to estimate. In this study, restrictions between the evapotranspiration ability and soil moisture (SM) supply are considered, and evapotranspiration estimations from 1981 to 2010 in Afro-Eurasia are examined. The results show that the improved evapotranspiration estimation obtained by correcting the potential evapotranspiration in Afro-Eurasia, especially in the Asia-Africa arid regions, ranges from 0.2 to 1.2 mm day(-1), which was less than that obtained using the traditional Penman-Monteith evapotranspiration (PET, which ranges from 1.0 to approximately 11.0 mm day(-1)). Based on different evapotranspiration estimations, the characteristics of the precipitation recycling ratio (PRR) calculated using the dynamic recycling model (DRM) are analyzed and compared for three arid regions in the Asian-African continent, China-Mongolia (CM), West Asia (WA), and North Africa (NAF), during the precipitation season. A comparison with the results from the PET method reveals that the estimated evapotranspiration and precipitation recycling obtained using the corrected approach was more reasonable than that obtained using the Penman-Monteith method. Overall, the PRR in CM (about 0.7%) and NAF (about 0.5%) shows decreasing trends, whereas the PRR in WA (about 1.0%) increased, which implies that because the local moisture supply increased in WA and reduced in CM and NAF, the drought intensity increased in WA but weakened in CM and NAF. This trend was partially related to increased precipitation recycling that occurred with increased evapotranspiration in WA. Moreover, the negative PRR trend and alleviated drought intensity in CM and NAF implied that precipitation recycling had a negative effect when there was less local moisture supply in the region, and this alleviated the drought intensity in the Asian-African arid regions.
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000521505600001
WOS关键词	SOIL-MOISTURE ; TREND ANALYSIS ; WATER-BALANCE ; PART I ; SURFACE ; CLIMATOLOGY ; EVAPORATION ; VARIABILITY ; DROUGHT ; PLATEAU
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315660
作者单位	1.Chinese Acad Sci, Key Lab Ecohydrol Inland River Basin, NW Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China; 2.Lanzhou Univ, Coll Atmospher Sci, Key Lab Arid Climate Change & Disaster Reduct Gan, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Li, Ruolin,Wang, Chenghai. Precipitation recycling using a new evapotranspiration estimator for Asian-African arid regions[J]. 兰州大学,2020,140(1-2):1-13.
APA	Li, Ruolin,&Wang, Chenghai.(2020).Precipitation recycling using a new evapotranspiration estimator for Asian-African arid regions.THEORETICAL AND APPLIED CLIMATOLOGY,140(1-2),1-13.
MLA	Li, Ruolin,et al."Precipitation recycling using a new evapotranspiration estimator for Asian-African arid regions".THEORETICAL AND APPLIED CLIMATOLOGY 140.1-2(2020):1-13.