Analysis of Meteorological Data Time Step Based on FAO Penman-Monteith Equation

Author

Xiu-Qin Yang ; Ping-an Zhong

Author_Institution

Appl. Hydrometeorological Res. Inst. of Nanjing, Univ. of Inf. Sci. & Technol., Nanjing, China

fYear

2011

fDate

25-28 March 2011

Firstpage

1

Lastpage

4

Abstract

Daily reference crop evapotranspiration ET_ο was calculated by means of the Penman-Monteith method, and the monthly ET_ο value was accumulated based on two different time steps of daily and monthly mean meteorological data. The adopted data include meteorological records from Yanzhou (1981-1986)and Heze weather station (1981-1986), Dingtao weather station (1997-2002). The differences of ET_ο value calculated with two different scales of meteorological data were evaluated. The results show that: First, monthly ET_ο values calculated with two time steps weather data have a high correlation, and the correlation coefficient between them is about 0.97. Second, monthly ET_ο value calculated with mean monthly meteorological data is 3% lower than ET_ο calculated by the daily mean meteorological data. Consequently the paper comes to the conclusion that ET_ο can be calculated with mean monthly meteorological data instead of daily mean meteorological data by means of the Penman-Monteith equation.

Keywords

crops; evaporation; meteorology; transpiration; FAO Penman-Monteith equation; crop water requirement; daily reference crop evapotranspiration; meteorological data time step analysis; time steps weather data; Agriculture; Correlation; Equations; Mathematical model; Meteorology; Ocean temperature; Water resources;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Engineering Conference (APPEEC), 2011 Asia-Pacific

Conference_Location

Wuhan

ISSN

2157-4839

Print_ISBN

978-1-4244-6253-7

Type

conf

DOI

10.1109/APPEEC.2011.5747698

Filename

5747698