干旱区生态环境知识资源中心(Arid): Evaporation Through a Dry Soil Layer: Column Experiments

Arid

DOI	10.1029/2020WR028286
	Evaporation Through a Dry Soil Layer: Column Experiments
	Balugani, E.; Lubczynski, M. W.; Metselaar, K.
通讯作者	Balugani, E (corresponding author), Univ Twente, Fac Geoinformat Sci & Earth Observ ITC, Enschede, Netherlands.
来源期刊	WATER RESOURCES RESEARCH
ISSN	0043-1397
EISSN	1944-7973
出版年	2021
卷号	57 期号:8
英文摘要	Modeling of water vapor transport through a dry soil layer (DSL), typically formed in the top soil during dry seasons in arid and semi-arid areas, is still problematic. Previous laboratory experiments in controlled environments showed that the only vapor transport process through the DSL is by Fick's law of diffusion. However, field experiments exhibited consistently higher evaporation rates than predicted by diffusion flow only. Some proposed reasons for the mismatch were: (a) daily cycles of condensation and evaporation in the DSL due to changes in solar radiation; (b) wind effects on air movement in the DSL; (c) atmospheric pressure fluctuations; (d) nonlinear influence of the DSL thickness on the evaporation process. To link the laboratory experiments with field observations, we performed soil column experiments in the laboratory with thick (>50 cm) DSL, and with different wind speeds, two radiative lamp schedules (continuous and 12 h daily cycles) and different thicknesses of DSL. Atmospheric pressure, air temperature and humidity were measured continuously. The results show that the evaporation rates observed are larger than those predicted by diffusion flow only. We found that it was possible to model the evaporation rates as a function of atmospheric pressure fluctuations. In conclusion, atmospheric pressure fluctuations can induce evaporation rates in DSL larger than estimated by diffusion flow only, possibly explaining the discrepancy between laboratory and field evaporation rates.
英文关键词	dry soil layer semi-arid climate soil evaporation bare soil soil column experiment barometric pumping
类型	Article
语种	英语
开放获取类型	hybrid, Green Published
收录类别	SCI-E
WOS记录号	WOS:000688205400057
WOS关键词	POROUS-MEDIA ; WATER ; DYNAMICS ; SURFACE ; VAPOR ; TIDES ; FLOW
WOS类目	Environmental Sciences ; Limnology ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364869
作者单位	[Balugani, E.; Lubczynski, M. W.] Univ Twente, Fac Geoinformat Sci & Earth Observ ITC, Enschede, Netherlands; [Metselaar, K.] Wageningen Univ, Wageningen, Netherlands
推荐引用方式 GB/T 7714	Balugani, E.,Lubczynski, M. W.,Metselaar, K.. Evaporation Through a Dry Soil Layer: Column Experiments[J],2021,57(8).
APA	Balugani, E.,Lubczynski, M. W.,&Metselaar, K..(2021).Evaporation Through a Dry Soil Layer: Column Experiments.WATER RESOURCES RESEARCH,57(8).
MLA	Balugani, E.,et al."Evaporation Through a Dry Soil Layer: Column Experiments".WATER RESOURCES RESEARCH 57.8(2021).