Evaluation and Analysis of Solar Energy Resources on the Qinghai Plateau from 1961 to 2020
Utilizing the observational data from 5 solar radiation stations and 50 meteorological stations on the Qinghai Plateau from 1961 to 2020,the total solar radiation on the Qinghai Plateau was estimated based on the meteorological industry standard"Method for Solar Energy Resource Assessment".The temporal and spatial variations in solar energy resources were analyzed using climatological statistics,linear trends,and other methods.The results indicate:(1)The spatial distribution of total solar radiation on the Qinghai Plateau increases from east to west,with the highest annual average value reaching 6,593.1 MJ·m-2 in the western part of Qinghai,specifically in the Haixi region.Over the past 60 years,there has been a significant overall decreasing trend in total solar radiation,with a reduction rate of 24.9 MJ·m-2.(2)The distribution of sunshine duration is characterized by less in the southeast and more in the northwest,with a significant overall decreasing trend over the past 60 years,at a rate of 27.6 h·(10a)-1.(3)The number of days with more than 6 hours of sunshine increases from southeast to northwest,and solar energy resources are stable in most areas of the Qinghai Plateau,with 33 stations(66％of the total)having a K-value less than 2.(4)Using the solar energy resource assessment method,the Qinghai Plateau is divided into three different types of solar energy resource regions,with the most resource-rich areas being in the Qaidam Basin and the southern part of the Tanggula Mountains,which are the regions with the best prospects for solar energy resource utilization on the Qinghai Plateau.The analysis provides technical support and scientific basis for the rational development and utilization of solar energy resources in Qinghai Province,contributing to the greater economic benefits of green energy in the plateau region.
Solar energy resourcesSpatial and temporal variationsResource assessmentQinghai Plateau
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