Li Lingyu, Cao Jing, Hao Yufang
College of Environmental Sciences and Engineering, Carbon Neutrality and Eco-Environmental Technology Innovation Center of Qingdao, Qingdao University, Qingdao 266071, China.
College of Environmental Sciences and Engineering, Carbon Neutrality and Eco-Environmental Technology Innovation Center of Qingdao, Qingdao University, Qingdao 266071, China.
Sci Total Environ. 2023 Apr 10;868:161636. doi: 10.1016/j.scitotenv.2023.161636. Epub 2023 Jan 16.
China suffered from serious and elevated ozone (O) pollution during 2014-2020. O exposure increased with W126, a biologically based cumulative exposure index, at a rate of 1.738 ppm-hr yr. MEGAN3.1 was applied to estimate biogenic volatile organic compound (BVOC) emissions and their response to O pollution in China by quantifying species responses to O stress. In 2020, China's BVOC emissions were 23.26 Tg when considering the effects of O pollution, which was 1.7 % higher than that without O stress. Isoprene, monoterpenes, sesquiterpenes, and other VOC emissions changed by -1.0 %, 1.4 %, 15.5 %, and 2.7 %, respectively. The stimulated BVOC emissions were mainly focused on the North China Plain (NCP) and a partial area of the Tibetan Plateau, which increased by >45 %. Changes in monthly emissions differed, with the greatest increase, 181 tons (3.25 %), in August. The seasonal patterns for the impacts of O pollution were also distinguished spatially. The elevated O exposure caused BVOC emission increases of 104.7 Gg yr during 2014-2020, with isoprene, monoterpenes, sesquiterpenes, and other VOCs contributing -18.6 %, 27.5 %, 40.4 %, and 50.8 %, respectively. The greatest increase in emissions appeared on the NCP and eastern and central China, with annual increases of >100 tons per grid (36 km × 36 km). The interannual variations in BVOC emissions also displayed different seasonal patterns.
2014年至2020年期间，中国遭受了严重且不断加剧的臭氧（O）污染。臭氧暴露量随着基于生物学的累积暴露指数W126的增加而增加，速率为1.738 ppm-hr/年。应用MEGAN3.1通过量化物种对臭氧胁迫的响应来估算中国的生物源挥发性有机化合物（BVOC）排放及其对臭氧污染的响应。在2020年，考虑到臭氧污染的影响，中国的BVOC排放量为23.26 Tg，比没有臭氧胁迫时高出1.7%。异戊二烯、单萜、倍半萜和其他挥发性有机化合物的排放量分别变化了-1.0%、1.4%、15.5%和2.7%。受刺激的BVOC排放主要集中在华北平原（NCP）和青藏高原的部分地区，增加幅度超过45%。月排放量变化不同，8月份增加最多，为181吨（3.25%）。臭氧污染影响的季节模式在空间上也有差异。2014年至2020年期间，臭氧暴露量升高导致BVOC排放量每年增加104.7 Gg，其中异戊二烯、单萜、倍半萜和其他挥发性有机化合物分别贡献了-18.6%、27.5%、40.4%和50.8%。排放量增加最大的地区出现在华北平原以及中国东部和中部，每个网格（36公里×36公里）的年增加量超过100吨。BVOC排放的年际变化也呈现出不同的季节模式。
