| 引用本文: | 周 毅，诺 桑，措加旺姆，伟色卓玛，段 杰，赵 地，晋亚铭，
胡贵军.2018.西藏地面太阳光谱观测[J].地球环境学报,9(2):193-199 |
| ZHOU Yi, Norsang Gelsor, Tsoja Wangmu, Weise Zhuoma, DUAN Jie, ZHAO Di, JIN Yaming, HU Guijun.2018.Ground-based measurements of solar spectrum in Tibet[J].Journal of Earth Environment,9(2):193-199 |
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| 摘要: |
| 通过使用德国TriOS公司生产的RAMSES-ACC-UV/VIS光谱仪，在2016 — 2017年对西藏四个地区（拉萨、林芝、阿里和定日）进行了阶段性的太阳光谱（波长280 — 950 nm）实地观测。初步研究了西藏四个地区地面太阳光谱强度、光谱曲线特征以及光谱随时间的变化等，结果显示在本次观测期间，2017年7月21日（晴天）当地正午（北京时间13点58分）拉萨晴天光谱在476.6 nm波长处出现强度最高，峰值达到2.05 W ∙ m−2 ∙ nm−1。同时对比了观测期间拉萨与定日、拉萨与林芝的当地正午晴天太阳光谱特征，对比结果表明：定日光谱强度高于拉萨，拉萨光谱强度高于林芝。定日光谱曲线平滑程度高于拉萨，拉萨光谱曲线平滑程度高于林芝，主要由水汽、氧气吸收造成。 |
| 关键词: 西藏 太阳光谱 观测 |
| DOI：10.7515/JEE182015 |
| CSTR： |
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| 基金项目:2017年度西藏大学青年科研培育基金项目（ZDPJZK1707）；西藏大学珠峰学者培养计划——珠峰学者（诺桑）；?西藏大学珠峰学者培养计划——杰出青年（措加旺姆） |
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| Ground-based measurements of solar spectrum in Tibet |
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ZHOU Yi, Norsang Gelsor, Tsoja Wangmu, Weise Zhuoma, DUAN Jie, ZHAO Di, JIN Yaming, HU Guijun
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1. Geophysics Institute, Tibet University, Lhasa 850000, China
2. Tingri Meteorological Bureau, Shigatse 858200, China
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| Abstract: |
| Background, aim, and scope The solar spectrum has an important influence on ecology and other aspects, the measurements of solar spectrum in Tibet is of special significance for Tibet as it is one of the regions with the highest solar radiation energy. Materials and methods We made periodic measurements for solar spectrums at four sites (Lhasa, Nyingchi, Ngari, Tingri) in Tibet during 2016—2017, by using the RAMSES-ACC-UV/VIS solar spectrometers (280—950 nm) made by TriOS company of Germany. Ground spectral intensities, spectral characteristics and temporal variation of the pectrums for the four sites were preliminary studied. Results The highest spectral intensity appeared at 476.6 nm wavelength, with peak value of 2.05 W ∙ m−2 ∙ nm−1 in Lhasa at local noon time on July 21, 2017 (cloudless day). Meanwhile, made comparisons for the local noon spectral characteristics of clear days between Lhasa and Tingri, as well as Lhasa and Nyingchi. The spectral intensities in Tingri are higher than that of Lhasa; the spectral intensities in Lhasa are higher than that of Nyingchi. The spectral curves in Tingri are flighty smoother than that of Lhasa; the spectral curves in Lhasa are smoother than that of Nyingchi. Discussion We did research on the characteristics of the solar spectrum in the Tibetan Plateau for the first time based on the preliminary observation and study of the solar spectrum in four regions of Tibet. The research Indicated that the solar spectral curves in Tibet were smoother than that of in the low altitude. It means that the greenhouse gases (water vapor, ozone, carbon dioxide, etc.) in the atmosphere of the Tibetan Plateau are relatively lower than that of in low altitude. The observation results also indicated that the overall intensity of the solar spectrum in Tibet are relatively higher than that of in the low altitude, this is due to the high altitude, thin or rare air over the Tibetan Plateau. Conclusions The solar spectrum reaches maximum value at 476.6 nm wavelength, absorption of the solar spectrum by O2 and H2O in the atmosphere can be estimated by comparing the smoothness of the solar spectral curves. Recommendations and perspectives Further systematic measurements of the solar spectrum in Tibet is needed to provide more field data for there is little measurements on the solar spectrum data in Tibet. |
| Key words: Tibet solar spectrum measurements |
