Impacts of the East Asian monsoon on lower tropospheric ozone over coastal South China

Impacts of the East Asian monsoon on lower tropospheric ozone over coastal South China
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东亚季风对华南沿海对流层低层臭氧的影响

DOI:
10.1088/1748-9326/8/4/044011
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发表时间:
2013-12
影响因子:
6.7
通讯作者:
Liu, Jane
Liu, Jane
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Hao, Nan;Ding, Aijun;Mao, Huiting;Fu, Congbin;Wang, Tao;Chan, L. Y.;Ding, Ke;Zhang, Yang;Liu, Jane

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用一氧化碳拉格朗日扩散模式和东亚季风指数计算方法,分析了11年香港上空臭氧探空资料,研究了东亚季风对中国南部沿海地区气候学和对流层臭氧年际变化的影响。结果表明,对流层下部臭氧的季节变化与研究区上空的大气环流高度相关。自由对流层中臭氧的增强与季风引起的大陆人为和生物质燃烧产生的污染物的输送有关。低对流层臭氧水平表现出很高的年际变化,年平均幅度高达边界层(0-1公里高度)平均浓度的61%,低于3公里高度的49%。在春季和秋季,边界层O_3水平的年际变化主要受EAM强度的影响,高的O_3混合比与东北环流异常有关。
The impact of the East Asian monsoon (EAM) on climatology and interannual variability of tropospheric ozone (O3) over the coastal South China was investigated by analyzing 11 years of ozonesonde data over Hong Kong with the aid of Lagrangian dispersion modeling of carbon monoxide and calculation of an EAM index. It was found that the seasonal cycle of O3 in the lower troposphere is highly related to the EAM over the study region. Ozone enhancements in the free troposphere are associated with the monsoon-induced transport of pollutants of continental anthropogenic and biomass burning origins. Lower tropospheric O3 levels showed high interannual variability, with an annual averaged amplitude up to 61% of averaged concentrations in the boundary layer (0–1 km altitudes) and 49% below 3 km altitude. In spring and autumn, the interannual variability in boundary layer O3 levels was predominately influenced by the EAM intensity, with high O3 mixing ratios associated with northeasterly circulation anomalies.
DOI: 10.1029/2012jd017498
发表时间: 2012-06
影响因子: --
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DOI: 10.1016/s1352-2310(97)00320-8
发表时间: 1998-01-01
影响因子: 5
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发表时间: 1999-10
期刊: Climatic Change
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