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DOI	10.2478/johh-2021-0030
	Mapping past, present and future dew and rain water resources for biocrust evolution in southern Africa
	Muselli, Marc; Beysens, Daniel
通讯作者	Beysens, D (corresponding author), OPUR, 2 Rue Verderet, F-75016 Paris, France. ; Beysens, D (corresponding author), Sorbonne Univ, Phys & Mecan Milieux Heterogenes, PSL Univ, CNRS,ESPCI Paris,Sorbonne Paris Cite, 10 Rue Vauquelin, F-75005 Paris, France.
来源期刊	JOURNAL OF HYDROLOGY AND HYDROMECHANICS
EISSN	1338-4333
出版年	2021
卷号	69 期号:4 页码:400-420
英文摘要	Biocrust sustainability relies on dew and rain availability. A study of dew and rain resources in amplitude and frequency and their evolution is presented from year 2001 to 2020 in southern Africa (Namibia, Botswana, South Africa) where many biocrust sites have been identified. The evaluation of dew is made from a classical energy balance model using meteorological data collected in 18 stations, where are also collected rain data. One observes a strong correlation between the frequency of dew and rain and the corresponding amplitudes. There is a general tendency to see a decrease in dew yield and dew frequency with increasing distance from the oceans, located west, east and south, due to decreasing RH, with a relative minimum in the desert of Kalahari (Namibia). Rain amplitude and frequency decreases when going to west and north. Short-term dew/rain correlation shows that largest dew yields clearly occur during about three days after rainfall, particularly in the sites where humidity is less. The evolution in the period corresponds to a decrease of rain precipitations and frequency, chiefly after 2010, an effect which has been cyclic since now. The effect is more noticeable towards north. An increase of dew yield and frequency is observed, mainly in north and south-east. It results in an increase of the dew contribution with respect to rain, especially after 2010. As no drastic changes in the distribution of biomass of biocrusts have been reported in this period, it is likely that dew should compensate for the decrease in rain precipitation. Since the growth of biocrust is related to dew and rain amplitude and frequency, future evolution should be characterized by either the rain cycle or, due to global change, an acceleration of the present tendency, with more dew and less rainfalls.
英文关键词	Biocrust Dew and rain evolution Dew rain ratio Dew rain correlation Southern Africa Climate change
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000719814700006
WOS关键词	DESERT ; YIELD
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374031
作者单位	[Muselli, Marc] Univ Cors Pasquale Paoli, Ave 9 Septembre,BP 52, F-20250 Corte, France; [Muselli, Marc; Beysens, Daniel] OPUR, 2 Rue Verderet, F-75016 Paris, France; [Beysens, Daniel] Sorbonne Univ, Phys & Mecan Milieux Heterogenes, PSL Univ, CNRS,ESPCI Paris,Sorbonne Paris Cite, 10 Rue Vauquelin, F-75005 Paris, France
推荐引用方式 GB/T 7714	Muselli, Marc,Beysens, Daniel. Mapping past, present and future dew and rain water resources for biocrust evolution in southern Africa[J],2021,69(4):400-420.
APA	Muselli, Marc,&Beysens, Daniel.(2021).Mapping past, present and future dew and rain water resources for biocrust evolution in southern Africa.JOURNAL OF HYDROLOGY AND HYDROMECHANICS,69(4),400-420.
MLA	Muselli, Marc,et al."Mapping past, present and future dew and rain water resources for biocrust evolution in southern Africa".JOURNAL OF HYDROLOGY AND HYDROMECHANICS 69.4(2021):400-420.