Analysis Of Spatial And Temporal Distribution Of Solar Resource In Xingjiang Based On Satellite Remote Sensing

With the rapid development of the world's population and industrial economy, the limitedfossil fuel reserves already cannot satisfy the rising energy demand and it is imperative to improvethe energy structure. Solar energy resources with the advantages of its widely distributed, locallydesirable, without transport, and small impact on the environment, have been internationallyrecognized as one of the most competitive new energy in the future. A specific geographicallocation and climatic conditions make Xinjiang abundant solar energy resources. Spatial andtemporal distribution of surface shortwave solar radiation for the period from1984to2007inXinjiang Province was analyzed based on GEWEX-SRB satellite data. First of all, the annualmean solar radiation spatial distribution and seasonal distribution characteristics were compared inall sky and clear sky at Xinjiang region. Afterwards, the annual variations and inter annualvariations of solar radiation at Xinjiang in all sky were discussed in detail. In addition, the climatechange trend rate of solar radiation for24years was explored. Finally, the solar radiationdistributions of ten typical cities in southern and northern Xinjiang and five regions named "threemountains and two basins" were studied in-depth. The study will help to establish solar radiationevolution database of Xinjiang and provide a scientific basis for future climate change research. Itwill lay the foundation for the effective development of solar energy resources in Xinjiang. Themain conclusions are as follows.The space distribution of the average solar radiation flux for24years showed that the average solar radiation flux reduced from southeast to northwest with increasing of latitude in all sky, andit changed from meridional distribution to zonal distribution from spring to winter. In clear sky,the average solar radiation flux decreased from south to north and solar radiation showed asignificant latitudinal distribution in full-year. Due to the impact of the cloud, solar radiation fluxvalues of clear sky were higher than the all sky.The temporal distribution of the average solar radiation flux for24years showed that theannual average solar flux in Xinjiang region presented a single peak distribution trend, closed tothe normal distribution with the maximum value appearing in June. The daily mean solar radiationwas the highest at14:00, followed by17:00,11:00,20:00and8:00. The seasonal average solarradiation was highest in summer, followed by autumn, spring and winter.In the annual variation of10typical cities in the southern and northern of Xinjiang, solarradiation flux values of five cities in the south were greater than the cities in the north. Theaverage radiation of five southern cities from largest to smallest was Qiemo, Korla, Aksu, Hotan,Kashgar. The average radiation of five northern cities from largest to smallest was Hami, Turpan,Urumqi, Yining, Altay. The order of "three mountains and two basins" five districts in the averageradiation from small to large was Altai Mountains, Junggar Basin, Tianshan Mountains, KunlunMountains and the Tarim region.The average value of solar radiation flux for24years rose gradually. The change trenddecreased in summer and increased in the rest of the seasons. And the change rate of solarradiation increased most in spring and increased at least in winter.