| DOI: | 10.1002/2015GL064354
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| 论文题名: | Turbulence-induced thermal signatures over evaporating bare soil surfaces |
| 作者: | Haghighi E.; Or D.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9442
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| EISSN: | 1944-9173
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| 出版年: | 2015
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| 卷: | 42, 期:13 | | 起始页码: | 5325
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| 结束页码: | 5336
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| 语种: | 英语
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| 英文关键词: | soil evaporation
; surface renewal
; thermal signatures
; turbulent exchange
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| Scopus关键词: | Air
; Atmospheric temperature
; Evaporation
; Surface properties
; Surface waters
; Temperature measurement
; Turbulence
; Aerodynamic properties
; Experimental methodology
; Hydrothermal properties
; Soil evaporations
; Surface skin temperature
; Surface temperature measurement
; Surface temperatures
; Thermal signatures
; Soils
; airflow
; bare soil
; energy balance
; evaporation
; infrared spectroscopy
; sensible heat flux
; soil surface
; turbulence
; turbulent flow
; water content
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| 英文摘要: | Soil wetness and airflow turbulence are key factors affecting surface energy balance components thereby influencing surface skin temperature. Turbulent eddies interacting with evaporating surfaces often induce localized and intermittent evaporative and sensible heat fluxes that leave distinct thermal signatures. These surface thermal fluctuations observable by infrared thermography (IRT) offer a means for characterization of overlaying turbulent airflows and remote quantification of surface wetness. We developed a theoretical and experimental methodology for using rapid IR surface temperature measurements to deduce surface wetness and evaporative fluxes from smooth bare soils. The mechanistic model provides theoretical links between surface thermal fluctuations, soil, and aerodynamic properties enabling thermal inferences of soil wetness with explicit consideration of soil thermal capacity and airflow turbulence effects. The method potentially improves accuracy of soil wetness assessment by IRT-based techniques whose performance is strongly influenced by surface-turbulence interactions and offers new ways for quantifying fluxes directly at their origin. Key Points Linking surface hydrothermal properties with turbulence thermal imprints Remote estimation of surface water content from surface thermal fluctuations Surface temperature-based quantification of evaporation from smooth bare soils. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938152913&doi=10.1002%2f2015GL064354&partnerID=40&md5=beda91894d1b4782610183a7d91da524
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/9057
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Soil and Terrestrial Environmental Physics, Department of Environmental Systems Science, ETH Zurich, Zürich, Switzerland
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| Recommended Citation: | |
Haghighi E.,Or D.. Turbulence-induced thermal signatures over evaporating bare soil surfaces[J]. Geophysical Research Letters,2015-01-01,42(13).
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