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    Improving Projected Potential Evapotranspiration Estimates Using National Weather Service Forecasts

    Source: Journal of Applied Meteorology:;1988:;volume( 027 ):;issue: 010::page 1183
    Author:
    Meyer, Steven J.
    ,
    Hubbard, Kenneth G.
    ,
    Wilhite, Donald A.
    DOI: 10.1175/1520-0450(1988)027<1183:IPPEEU>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: In a recent survey conducted by the University of Nebrask's Center for Agricultural Meteorology and Climatology of Agricultural Network (AGNET) users, the results of potential evapotranspiration (ETp) projections (calculated using the Blaney-Criddle approach, which employs ?normal? climatic data to project ETp, estimates up to three days into the future) were labeled ?unrealistic?. To improve these projection National Weather Service (NWS) forecast variables were used as input into the Blancy-Criddle and Penman equations. ETp, projections calculated according to the Penman equation, with data measured by automated weather stations as input, were assumed to represent the ?best? attainable. ETp projections calculated using NWS forecasted values were compared with the ?best? projections for the summer of 1985. Increased accuracy in ETp, projections due to increased accuracy in the individual forecasted input variables was evaluated. Overall, daily ETp, projections made with the Blancy-Criddle equation were substantially improved using the NWS forecasted temperature in place of normal temperature; over a growing season, however, accurate estimates resulted from using normal temperatures. The use of NWS-forecasted variables as input into the Penman equation offers the greatest potential for improving ETp, projections. ?Over? forecasting of all variables (relative to the estimation of ETp,) limited the ability of the Penman equation in this study. For greatest improvement in ETp, projections using the Penman equation, efforts should be concentrated on improving forecasts of relative humidity and solar radiation.
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      Improving Projected Potential Evapotranspiration Estimates Using National Weather Service Forecasts

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4146599
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    • Journal of Applied Meteorology

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    contributor authorMeyer, Steven J.
    contributor authorHubbard, Kenneth G.
    contributor authorWilhite, Donald A.
    date accessioned2017-06-09T14:02:30Z
    date available2017-06-09T14:02:30Z
    date copyright1988/10/01
    date issued1988
    identifier issn0894-8763
    identifier otherams-11378.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4146599
    description abstractIn a recent survey conducted by the University of Nebrask's Center for Agricultural Meteorology and Climatology of Agricultural Network (AGNET) users, the results of potential evapotranspiration (ETp) projections (calculated using the Blaney-Criddle approach, which employs ?normal? climatic data to project ETp, estimates up to three days into the future) were labeled ?unrealistic?. To improve these projection National Weather Service (NWS) forecast variables were used as input into the Blancy-Criddle and Penman equations. ETp, projections calculated according to the Penman equation, with data measured by automated weather stations as input, were assumed to represent the ?best? attainable. ETp projections calculated using NWS forecasted values were compared with the ?best? projections for the summer of 1985. Increased accuracy in ETp, projections due to increased accuracy in the individual forecasted input variables was evaluated. Overall, daily ETp, projections made with the Blancy-Criddle equation were substantially improved using the NWS forecasted temperature in place of normal temperature; over a growing season, however, accurate estimates resulted from using normal temperatures. The use of NWS-forecasted variables as input into the Penman equation offers the greatest potential for improving ETp, projections. ?Over? forecasting of all variables (relative to the estimation of ETp,) limited the ability of the Penman equation in this study. For greatest improvement in ETp, projections using the Penman equation, efforts should be concentrated on improving forecasts of relative humidity and solar radiation.
    publisherAmerican Meteorological Society
    titleImproving Projected Potential Evapotranspiration Estimates Using National Weather Service Forecasts
    typeJournal Paper
    journal volume27
    journal issue10
    journal titleJournal of Applied Meteorology
    identifier doi10.1175/1520-0450(1988)027<1183:IPPEEU>2.0.CO;2
    journal fristpage1183
    journal lastpage1188
    treeJournal of Applied Meteorology:;1988:;volume( 027 ):;issue: 010
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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