Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Mengsheng Qin; Lu Hao; Lei Sun; Yongqiang LiuGe Sun
    Date: 2018
    Source: JAWRA Journal of the American Water Resources Association
    Publication Series: Scientific Journal (JRNL)
    Station: Southern Research Station
    PDF: Download Publication  (1.0 MB)

    Description

    Reference evapotranspiration (ETo) is an important hydrometeorological term widely used in understanding and projecting the hydrological effects of future climate and land use change. We conducted a case study in the Qinhuai River Basin that is dominated by a humid subtropical climate and mixed land uses in southern China. Long-term (1961–2012) meteorological data were used to estimate ETo by the FAO-56 Penman–Monteith model. The individual contribution from each meteorological variable to the trend of ETo was quantified. We found basin-wide annual ETo decreased significantly (p < 0.05) by 3.82 mm/yr during 1961–1987, due to decreased wind speed, solar radiation, vapor pressure deficit (VPD), and increased relative humidity (RH). However, due to the increased VPD and decreased RH, the ETo increased significantly (p < 0.05) in spring, autumn, and annually at a rate of 2.55, 0.56, and 3.16 mm/yr during 1988–2012, respectively. The aerodynamic term was a dominant factor controlling ETo variation in both two periods. We concluded the key climatic controls on ETo have shifted as a result of global climate change during 1961–2012. The atmospheric demand, instead of air temperature alone, was a major control on ETo. Models for accurately predicting ETo and hydrological change under a changing climate must include VPD in the study region. The shifts of climatic control on the hydrological cycles should be considered in future water resource management in humid regions.

    Publication Notes

    • You may send email to pubrequest@fs.fed.us to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Qin, Mengsheng; Hao, Lu; Sun, Lei; Liu, Yongqiang; Sun, Ge. 2018. Climatic controls on watershed reference evapotranspiration varied during 1961-2012 in southern China. JAWRA Journal of the American Water Resources Association. 55(1): 189-208. https://doi.org/10.1111/1752-1688.12714.

    Cited

    Google Scholar

    Keywords

    reference evapotranspiration, atmospheric demand, climate change, Qinhuai River Basin, FAO-56 Penman-Monteith model

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/58333