Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing, 210044, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing, 210044, China; University of Chinese Academy of Sciences, Beijing 100049, China.
J Environ Sci (China). 2020 Dec;98:71-76. doi: 10.1016/j.jes.2020.05.020. Epub 2020 Jun 13.
Ultraviolet radiation (UV) and ozone can greatly affect human health and the Earth's ecological environment. By deploying a UV radiometer aboard a stratospheric balloon released at Qaidam (QDM) during the Asian summer monsoon (ASM) period in 2019, we provided in situ measurement of the UV profiles from the surface to the upper troposphere and lower stratosphere over the Tibetan Plateau (TP), China, for the first time. Based on two in situ UV profiles accompanied by four ozonesonde measurements, this study exhibited detailed variations of downwelling UV and vertical ozone distributions over the TP during the ASM period. The UV differences between the surface and stratospheric balloon flight altitudes were 16.7, 15.8, 12.6 and 18.0 Wm during the four ozonesonde launches. Due to the diurnal variations in photochemical production and the stratosphere-troposphere exchange, the integrated ozone columns below 30 km ranged from 184.4 to 221.6 DU from four ozonesonde measurements. A positive correlation between UV attenuation and ozone column was exhibited under low cloud cover and clear sky conditions. The results of this study are expected to improve our understanding of UV and ozone properties, as well as their potential effects on terrestrial ecosystems and living environments over this significant plateau.
紫外线辐射（UV）和臭氧会对人类健康和地球生态环境产生重大影响。2019 年亚洲夏季风期间，我们在柴达木（QDM）部署了一个平流层气球，搭载了紫外线辐射计，首次提供了中国青藏高原（TP）从地表到上对流层和下平流层的紫外线剖面的现场测量。基于两个伴随四个臭氧探空仪测量的现场紫外线剖面，本研究展示了亚洲夏季风期间青藏高原上空的下行紫外线和垂直臭氧分布的详细变化。在四个臭氧探空仪发射期间，紫外线在地表和气球飞行高度之间的差异分别为 16.7、15.8、12.6 和 18.0 Wm。由于光化学产生的日变化和平流层-对流层交换，从四个臭氧探空仪测量中得到的 30km 以下的综合臭氧柱范围为 184.4 至 221.6 DU。在低云覆盖和晴空条件下，紫外线衰减与臭氧柱之间呈现正相关。本研究的结果有望提高我们对紫外线和臭氧特性的认识，以及它们对这个重要高原上的陆地生态系统和生活环境的潜在影响。
