First in situ UV profile across the UTLS accompanied by ozone measurement over the Tibetan Plateau
First in situ UV profile across the UTLS accompanied by ozone measurement over the Tibetan Plateau
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首个横跨 UTLS 的原位紫外线剖面图，并伴有青藏高原上空的臭氧测量
DOI：
10.1016/j.jes.2020.05.020
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发表时间：
2020
影响因子：
6.9
通讯作者：
Xue Wu
中科院分区：
文献类型：
--
作者：
Zhang Jinqiang;Xiangao Xia;Xue Wu
紫外线辐射和臭氧对人类健康和地球生态环境有很大影响。通过在2019年亚洲夏季风（ASM）期间在柴达木（QDM）释放的平流层气球上部署紫外辐射计，我们首次在中国青藏高原（TP）提供了从地面到对流层上部和平流层下部的紫外线廓线的现场测量。基于两个现场紫外线廓线和四个臭氧探空仪的测量，本研究显示了在ASM期间TP上空下降流紫外线和臭氧垂直分布的详细变化。在四次臭氧探测仪发射期间，地面和平流层气球飞行高度之间的紫外线差异分别为16.7、15.8、12.6和18.0 Wm− 2。由于光化学产生和平流层-对流层交换的日变化，从四个臭氧探空仪测量的30公里以下的综合臭氧柱范围为184.4至221.6 DU。在低云量和晴朗的天空条件下，紫外线衰减和臭氧柱之间呈现出正相关关系。这项研究的结果有望提高我们对紫外线和臭氧特性的理解，以及它们对这一重要高原上陆地生态系统和生活环境的潜在影响。
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−2during 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.