Construction of Regional Optical Typical Meteorological Year Based on Entropy-Sandia Method

Le résumé fourni par la source

Aiming at the problems of existing atmospheric environment models in light transmission assessment applications, such as incomplete parameter coverage, missing extreme value information, difficulty in achieving physical constraints for unconventional meteorological parameters, and insufficient consideration of horizontal atmospheric inhomogeneity, an objectively weighted method for constructing Regional Optical Typical Meteorological Years (ROTMY) based on the entropy weight-Sandia method is proposed. This method can flexibly incorporate both conventional and unconventional atmospheric parameters while automatically satisfying physical constraints among all parameters. The accuracy of the method was validated using hourly ERA5 reanalysis data for Xi'an from 2013 to 2024. The results show that the annual average relative deviation at the central site of the constructed ROTMY is 7.83%, and the regional average relative deviation is less than 15%, indicating that the dataset can effectively represent the typical spatiotemporal distribution of the atmospheric environment over a limited area around the selected sites for extended periods. The average extreme value coverage rate is 80.3%, demonstrating that the dataset can be used to assess the impact of most atmospheric extreme values on light transmission.

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