Open AccessComparison of meteorological data, related to reference evapotranspiration, from conventional and automatic stations in the Sertão and Agreste regions of Pernambuco, Brazil
Author(s) -
Iug Lopes,
Miguel Júlio Machado Guimarães,
Juliana Maria Medrado de Melo,
Ceres Duarte Guedes Cabral de Almeida,
Breno Lopes,
Brauliro Gonçalves Leal
Publication year - 2021
Publication title -
dyna
Language(s) - English
Resource type - Journals
eISSN - 2346-2183
pISSN - 0012-7353
DOI - 10.15446/dyna.v88n216.86372
Subject(s) - evapotranspiration , automatic weather station , wind speed , environmental science , meteorology , relative humidity , weather station , climatology , geography , geology , ecology , biology
The objective was to perform a comparative study of the meteorological elements data that most cause changes in the reference Evapotranspiration (ETo, mm) and its own value, of automatic weather stations AWS and conventional weather stations CWS of the Sertão and Agreste regions of Pernambuco State. The ETo was calculated on a daily scale using the standard method proposed by the Food and Agriculture Organization (FAO), Penman-Monteith (FAO-56). The ETo information obtained from AWS data can be used to update the weather database of stations, since there is a good relationship between the ETo data obtained from CWS and AWS, statistically determined by the Willmott's concordance index (d > 0.7). The observed variations in the weather elements: air temperature, relative humidity, wind speed, and global solar radiation have not caused significant changes in the ETo calculation.