A New Index Developed for Fast Diagnosis of Meteorological Roles in Ground-Level Ozone Variations.

A New Index Developed for Fast Diagnosis of Meteorological Roles in Ground-Level Ozone Variations.
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为快速诊断地面臭氧变化中的气象作用而开发的新指数

DOI:
10.1007/s00376-021-1257-x
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发表时间:
2022
影响因子:
5.8
通讯作者:
Wang X
Wang X
中科院分区:
地球科学2区
文献类型:
--
作者:
Chen W;Wang W;Jia S;Mao J;Yan F;Zheng L;Wu Y;Zhang X;Dong Y;Kong L;Zhong B;Chang M;Shao M;Wang X

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2013年至2019年,中国地面臭氧(O3)污染不断恶化。本研究将气象参数(包括地表温度(T2)、太阳辐射(SW)和风速(WS))分为两个方面:(1)光化学反应条件(PRC = T2 × SW)和(2)物理扩散能力(PDC = WS)。在这种方式下,气象综合指数(MSI = PRC/PDC)的量化气象引起的地面O3污染。MDA 8(最大日8小时平均值)O3浓度第90百分位数与MSI之间的正线性关系决定了气象变化对地面O−3的贡献随纬度梯度变化,从中国南方的约40%下降到中国北方的10%-20%。有利的光化学反应条件对地面O3污染更为重要。这项研究提出了一个普遍适用的指数,快速诊断气象作用在地面O3的变化,这使得前体减排,可用于设计未来的控制政策的观察到的影响进行评估。补充材料可在本文的在线版本10.1007/s 00376 -021-1257-x中获得。
China experienced worsening ground-level ozone (O3) pollution from 2013 to 2019. In this study, meteorological parameters, including surface temperature (T2), solar radiation (SW), and wind speed (WS), were classified into two aspects, (1) Photochemical Reaction Condition (PRC = T2 × SW) and (2) Physical Dispersion Capacity (PDC = WS). In this way, a Meteorology Synthetic Index (MSI = PRC/PDC) was developed for the quantification of meteorology-induced ground-level O3 pollution. The positive linear relationship between the 90th percentile of MDA8 (maximum daily 8-h average) O3 concentration and MSI determined that the contribution of meteorological changes to ground-level O−3 varied on a latitudinal gradient, decreasing from ∼40% in southern China to 10%–20% in northern China. Favorable photochemical reaction conditions were more important for ground-level O3 pollution. This study proposes a universally applicable index for fast diagnosis of meteorological roles in ground-level O3 variability, which enables the assessment of the observed effects of precursor emissions reductions that can be used for designing future control policies. Supplementary material is available in the online version of this article at 10.1007/s00376-021-1257-x.
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