The warming Tibetan Plateau improves winter air quality in the Sichuan Basin, China
The warming Tibetan Plateau improves winter air quality in the Sichuan Basin, China
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青藏高原变暖改善了中国四川盆地冬季空气质量
DOI：
10.5194/acp-20-14873-2020
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发表时间：
2020-03
影响因子：
6.3
通讯作者：
Wang Zebin
中科院分区：
文献类型：
--
作者：
Zhao Shuyu;Feng Tian;Tie Xuexi;Wang Zebin
全球气候变化对大气污染发生发展的影响日益受到关注。本文研究了青藏高原变暖对四川盆地空气质量的影响。气象观测和ERA-Interim再分析数据显示，高原在过去40年（1979-2017）中迅速变暖，特别是在冬季，变暖率约为年变暖率的两倍。自2013年以来，高原冬季气温甚至上升了2摄氏度。在这里，我们使用WRF-Chem模式，强调2摄氏度变暖对流域空气质量的影响。模式结果表明，2 ℃的变暖导致东风增强，行星边界层高度（PBLH）的增加和相对湿度（RH）的下降在盆地。增强的东风增加了PM2.5从盆地到高原的输送。PBLH的升高加强了PM2.5的垂直扩散，而RH的降低则显著减少了二次气溶胶的形成。总体而言，PM2.5浓度降低了17.5%（类似于25.1 μ g m（-3）），其中一次和二次气溶胶的减少量分别为5.4和19.7 μ g m（-3）。这些结果表明，近期高原变暖改善了该流域的空气质量，在一定程度上减轻了该流域的空气污染。然而，气候系统特别复杂，需要更多的研究来证明气候变化对下游地区空气质量的影响，因为高原可能会继续变暖。
Impacts of global climate change on the occurrence and development of air pollution have attracted more attention. This study investigates impacts of the warming Tibetan Plateau on air quality in the Sichuan Basin. Meteorological observations and ERA-Interim reanalysis data reveal that the plateau has been rapidly warming during the last 40 years (1979-2017), particularly in winter when the warming rate is approximately twice as much as the annual warming rate. Since 2013, the winter temperature over the plateau has even risen by 2 degrees C. Here we use the WRF-Chem model to lay emphasis on the impact of the 2 degrees C warming on air quality in the basin. The model results show that the 2 degrees C warming causes an enhanced easterly wind, an increase in the planetary boundary layer height (PBLH) and a decrease in the relative humidity (RH) in the basin. Enhanced easterly wind increases PM2.5 transport from the basin to the plateau. The elevated PBLH strengthens vertical diffusion of PM2.5, while the decreased RH significantly reduces secondary aerosol formation. Overall, PM2.5 concentration is reduced by 17.5 % (similar to 25.1 mu g m(-3)), of which the reduction in primary and secondary aerosols is 5.4 and 19.7 mu g m(-3) respectively. These results reveal that the recent warming plateau has improved air quality in the basin, to a certain extent mitigating the air pollution therein. Nevertheless, the climate system is particularly complicated, and more studies are needed to demonstrate the impact of climate change on air quality in the downstream regions as the plateau is likely to continue warming.
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关中地区不同天气气象条件下山体对黑碳气溶胶的影响
影响因子：
5.5
作者：
Zhao Shuyu;Tie Xuexi;Cao Junji;Zhang Qiang
通讯作者：
Zhang Qiang
影响因子：
3.1
作者：
T. Tsuda;T. Inoue;S. Kato;S. Fukao;D. Fritts;T. Vanzandt
通讯作者：
T. Tsuda;T. Inoue;S. Kato;S. Fukao;D. Fritts;T. Vanzandt
DOI：
10.1088/1361-6463/acea30
发表时间：
2002
期刊：
Journal of Physics D: Applied Physics
影响因子：
--
作者：
J. Grooß;R. M. Uller
通讯作者：
J. Grooß;R. M. Uller
影响因子：
6.3
作者：
N. Bei;Guohui Li;Rujin Huang;Junji Cao;N. Meng;T. Feng;Sui-xin Liu;Ting Zhang;Qiang Zhang-Qiang-Zh
通讯作者：
N. Bei;Guohui Li;Rujin Huang;Junji Cao;N. Meng;T. Feng;Sui-xin Liu;Ting Zhang;Qiang Zhang-Qiang-Zh
影响因子：
3.2
作者：
T. Yabe;R. Tanaka;T. Nakamura;F. Xiao
通讯作者：
T. Yabe;R. Tanaka;T. Nakamura;F. Xiao