Soil water evaporation during the dry season in an arid zone

Nurit Agam, Pedro R. Berliner, Abraham Zangvil, Eyal Ben-Dor

    Research output: Contribution to journalArticlepeer-review

    35 Scopus citations


    The objective of this study was to assess the relative magnitude of latent heat flux density over a bare loess soil in the Negev desert throughout the dry season, during which the atmospheric models usually assume the lack of latent heat flux. The measurements were carried out in the northern Negev, Israel, over a bare loess soil, during nine 24-hour field campaigns throughout the dry season of 2002. In addition to a micrometeorological station that was set up in the research site, an improved microlysimeter was installed. The representativity of the microlysimeter was assessed by comparing its surface temperature to that of the surrounding surface using thermal images acquired on an hourly basis during several campaigns. It was found that although the water content of the uppermost soil is significantly lower than the wilting point, for which most of the commonly used meteorological models would assume no latent heat flux, the latter was ∼20% of the net-radiation during the night and 10-15% during the day. It is therefore concluded that latent heat flux plays a major role in the dissipation of the net radiation during the dry season in the Negev desert.

    Original languageEnglish
    Pages (from-to)D16103 1-10
    JournalJournal of Geophysical Research
    Issue number16
    StatePublished - 27 Aug 2004


    • Bare soil
    • Energy partitioning
    • Latent heat flux

    ASJC Scopus subject areas

    • Geophysics
    • Forestry
    • Oceanography
    • Aquatic Science
    • Ecology
    • Water Science and Technology
    • Soil Science
    • Geochemistry and Petrology
    • Earth-Surface Processes
    • Atmospheric Science
    • Earth and Planetary Sciences (miscellaneous)
    • Space and Planetary Science
    • Paleontology


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