Assessment of the modulation effect of rainfall on solar radiation availability at the Earth's surface

Meteorological applications

article

J. J. Díaz-Torres¹  L. Hernández-Mena¹  M. A. Murillo-Tovar²  E. León-Becerril¹  A. López-López¹  C. Suárez-Plascencia⁴  E. Aviña-Rodriguez⁴  A. Barradas-Gimate⁵  V. Ojeda-Castillo⁵ 

[1] Department of Environmental Technology, Center for Research and Assistance in Technology and Design of the State of Jalisco;National Council for Science and Technology, Cátedras Program;Chemical Research Center, Autonomous University of the Morelos State;Department of Geography and Spatial Planning, University of Guadalajara;Interinstitutional Postgraduate in Science and Technology, Center for Research and Assistance in Technology and Design of the State of Jalisco

关键词: irradiation;    rainfall;    overcast conditions;    Solar Analyst;    ENSO;    Guadalajara;   

DOI  :  10.1002/met.1616

学科分类：社会科学、人文和艺术（综合）

来源: Wiley

【 摘 要 】

A significant proportion of the solar irradiance that reaches the Earth's surface is normally attenuated by atmospheric properties and overcast conditions related to the rainy season. The Solar Analyst (SA) model, irradiance and long term precipitation data were used to assess this relationship in Guadalajara, Mexico. A spatial analysis based on morphological and statistical criteria increased the model's certainty. The SA model explains 95.4% of the irradiation variability observed on the ground, with average uncertainties of 3.7% during clear sky conditions in the dry season and 4.4% on sunny days in the wet season. The meteorological data analysis shows that total precipitation in 2014 had an atypical temporal distribution and was slightly lower (12.6%) than the average from 1991 to 2012. A deficit of 39% in precipitation compared to the long term average was found in the first half of the season, which was later partially compensated. This deficit was interpreted as a temporary delay in high values of precipitation. Based on the potential average irradiation from the SA model and field observations, it can be concluded that overcast conditions related to rainfall through 2014 attenuated approximately 28.5% of the incoming solar energy. Taking the global energy balance into account, this fraction was higher in comparison to the energy proportion reflected by the cloud's albedo ( ca 23%). These results suggest that both the high proportion of energy attenuated and atypical weather conditions may be local effects of large-scale phenomena such as the El Niño-Southern Oscillation.

【 授权许可】

CC BY|CC BY-NC|CC BY-NC-ND