西藏多点太阳光谱观测研究  

Solar spectral measurements at multipoint in Xizang

作　　者：普多旺 措加旺姆[1] 诺桑[1] 王倩 王文雅 盛敏 王萌萌 徐刚[3] PU Dopwang;WANGMU Tsoja;GELSOR Norsang;WANG Qian;WANG Wenya;SHENG Min;WANG Mengmeng;XU Gang(Solar UV Laboratory,Tibet University,Lhasa 850000,China;Energy Research and Demonstration Center of Xizang Autonomous Region,Lhasa 850000,China;Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510000,China)

机构地区：[1]西藏大学太阳紫外线实验室,西藏拉萨850000 [2]西藏自治区能源研究示范中心,西藏拉萨850000 [3]中国科学院广州能源研究所,广东广州510000

出　　处：《大气与环境光学学报》2024年第3期292-300,共9页Journal of Atmospheric and Environmental Optics

基　　金：国家自然科学基金项目(41867041);西藏自治区科技厅项目(JDRC2023000006);西藏大学"高水平人才培养计划"项目(2020-GSP-B011)。

摘　　要：西藏高海拔强太阳辐射为高原大气提供了热源,驱动着东亚大气环流和全球气候变化的“蝴蝶效应”。对该地区地面太阳光谱特征的同步观测能为地面大气环境变化、生态环境变化和太阳能资源利用等研究提供有效的实地数据。利用国际标准高精度太阳光谱仪RAMSES-ACC-VIS和SolarSIM-G,在2020―2021年期间对西藏拉萨、林芝、那曲、日喀则和珠峰地区进行了太阳光谱实地观测,首次同步观测了西藏高海拔地区多点全波段(波长280~2500nm)太阳光谱,研究了西藏多点太阳光谱辐照度的空间分布特征,并对西藏高海拔地区太阳光谱的吸收和散射等消光因素做了定性分析。研究发现在西藏五个观测地区中日喀则和珠峰地区全年平均太阳光谱辐照度最强,两地年均光谱峰值达0.83 W/(m^(2)·nm)以上;拉萨太阳光谱峰值仅次于日喀则和珠峰地区,年均峰值约0.73 W/(m^(2)·nm);那曲地区年均太阳光谱辐照度低于拉萨,峰值约0.53 W/(m^(2)·nm);林芝太阳光谱最低。在太阳光谱辐照度的空间分布特征方面,研究发现冬至日西藏光谱空间分布基本遵循纬向地带性规律,辐射强度随纬度升高而递减,而夏至日西藏各地因雨季原因纬向地带性规律不明显。Strong solar irradiance in Tibetan Plateau provides heat source for the plateau's atmosphere,driving atmospheric circulation of East Asian and the"butterfly effect"of global climate change.Synchronous observation of the ground solar spectral characteristics in the region can provide effective field data for studying the changes of the ground atmospheric environment,ecological environment and the utilization of solar energy resources.Using the international standard high-precision solar spectrometers RAMSES-ACC-VIS and SolarSIM-G,the solar spectra of Lhasa,Nyingchi,Nagchu,Shigatse and Mt.Everest in Xizang,China,were observed during 2020 to 2021.Synchronous observation of full band solar spectra(wavelength covering from 280 nm to 2500 nm)at high altitude in Xizang was conducted for the first time,the spatial distribution characteristics of solar spectral irradiance at multiple points in Xizang were studied,and the extinction factors such as absorption and scattering of solar spectrum at high altitude in Xizang were qualitatively analyzed.The results show that the annual average solar spectral irradiance in Shigatse and the Mt.Everest are the strongest,with the annual average spectral peak of more than 0.83 W/(m^(2)·nm),the spectrum of Lhasa region is only inferior to that of Shigatse and Mt.Everest regions,with an average annual peak of about 0.73 W/(m^(2)·nm),the annual average solar spectrum in Nagchu is lower than that in Lhasa,with a peak value of about 0.53 W/(m^(2)·nm),and Nyingchi has the lowest solar spectrum.In terms of the spatial distribution characteristics of solar spectral irradiance,it is found that on the winter solstice,the spatial distribution of Xizang's spectral irradiance basically follows the zonal law,that is,the radiation intensity decreases with the increase of latitude,while on the summer solstice,the zonal regularity in Xizang is not so obvious due to rainy season weather.

关 键 词：西藏 太阳光谱 多点观测 生态环境 

分 类 号：P182.3[天文地球—天文学]