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The Impact of Temporal Aggregation on the Preistly-Taylor Method for Evapotranspiration
Delaroy, Jeffrey David
Delaroy, Jeffrey David
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Abstract
Aggregation of the Priestley-Taylor (PT) model for evapotranspiration is analyzed over the Great Plains of Kansas. Different orders of aggregation are used for calculations. The PT model is first calculated at half hour time steps - using variables with the same time step - then averaged at scales ranging from one day to thirty-two days. The other order of aggregation, averages the variables first at the different scales then calculating the PT equation. In addition to investigating the scale and order of aggregation, the PT parameter is also examined. the parameter is calculated from sensible heat and vapor pressure deficit. It is shown that averaging variables before calculating the PT, along with using a parameter derived from sensible heat, provide the best estimates for evapotranspiration.
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2017-01-01
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University of Kansas
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This item contains archived web content.
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Delaroy_ku_0099M_15561_DATA_1.pdf
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- Embargoed until 2167-05-31
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Keywords
Atmospheric sciences, Climate, Evapotranspiration, Grasslands, Priestley-Taylor