The IPAC-NC field campaign: a pollution and oxidization pool in the lower atmosphere over Huabei, China
The IPAC-NC field campaign: a pollution and oxidization pool in the lower atmosphere over Huabei, China
复制标题
IPAC-NC 野外活动：中国华北上空低层大气中的污染和氧化池
DOI：
10.5194/acp-12-3883-2012
复制
发表时间：
2011-10
期刊：
影响因子：
--
通讯作者：
Lelieveld, J.
中科院分区：
文献类型：
--
作者：
Ma, J. Z.;Wang, W.;Chen, Y.;Liu, H. J.;Yan, P.;Ding, G. A.;Wang, M. L.;Sun, J.;Lelieveld, J.
抽象。近几十年来，以光化学烟雾和灰霾为特征的区域性大气污染已成为我国严重的环境问题。为了研究这一问题，作为“华北地区污染对气溶胶和云微物理的影响”（IPAC-NC）项目的一部分，于2006年4月2日至5月16日在华北地区（位于北纬32-42°之间）进行了一次实地测量活动。城市和工业中心排放的强污染物似乎倾向于在华北中部地区的低层大气中积累。我们观测到广泛的、非常高的SO2混合比，在0.5- 1.5km高度约为20-40 ppbv，在1.5- 3.0km高度约为10-30 ppbv。在0.5-1.5公里高度，平均CO混合比为0.65-0.7 ppmv，在某些飞行中观察到约1 ppmv的非常高的CO，在地面甚至更高。我们发现高污染浓度与增强的OH和HO 2自由基水平，计算与化学箱模型的测量约束。在边界层上部和自由对流层下部，高CO和SO2与相对较少的NO2竞争与OH反应，通过HO 2有效地再循环，防止HOx自由基的净损失。除了反应性碳氢化合物和CO外，二氧化硫的氧化也会在华北上空产生大量的臭氧（在0.8 km的高度上达到约13%或2.0 ppbv h −1）。结果表明，华北地区低层大气不仅受到强污染，而且还具有氧化池的作用，污染物在华北地区发生了非常活跃的光化学反应。
Abstract. In the past decades, regional air pollution characterized by photochemical smog and grey haze-fog has become a severe environmental problem in China. To investigate this, a field measurement campaign was performed in the Huabei region, located between 32–42° N latitude in eastern China, during the period 2 April–16 May 2006 as part of the project "Influence of Pollution on Aerosols and Cloud Microphysics in North China" (IPAC-NC). It appeared that strong pollution emissions from urban and industrial centers tend to accumulate in the lower atmosphere over the central area of Huabei. We observed widespread, very high SO 2 mixing ratios, about 20–40 ppbv at 0.5–1.5 km altitude and 10–30 ppbv at 1.5–3.0 km altitude. Average CO mixing ratios were 0.65–0.7 ppmv at 0.5–1.5 km altitude, and very high CO around 1 ppmv was observed during some flights, and even higher levels at the surface. We find the high pollution concentrations to be associated with enhanced levels of OH and HO 2 radicals, calculated with a chemical box model constrained by the measurements. In the upper part of the boundary layer and in the lower free troposphere, high CO and SO 2 compete with relatively less NO 2 in reacting with OH, being efficiently recycled through HO 2 , preventing a net loss of HO x radicals. In addition to reactive hydrocarbons and CO, the oxidation of SO 2 causes significant ozone production over Huabei (up to ~13% or 2.0 ppbv h −1 at 0.8 km altitude). Our results indicate that the lower atmosphere over Huabei is not only strongly polluted but also acts as an oxidation pool, with pollutants undergoing very active photochemistry over this part of China.
登录
查看更多内容
影响因子：
64.8
作者：
J. Lelieveld
通讯作者：
J. Lelieveld
影响因子：
5.2
作者：
Yuxuan Wang;M. McElroy;K. F. Boersma;H. Eskes;J. Veefkind
通讯作者：
Yuxuan Wang;M. McElroy;K. F. Boersma;H. Eskes;J. Veefkind
影响因子：
6.3
作者：
S. Lou;F. Holland;F. Rohrer;K. Lu;B. Bohn;T. Brauers;Chih-Chung Chang-;H. Fuchs;R. Häseler;
通讯作者：
S. Lou;F. Holland;F. Rohrer;K. Lu;B. Bohn;T. Brauers;Chih-Chung Chang-;H. Fuchs;R. Häseler;
影响因子：
6.3
作者：
J. Mao;X. Ren;W. Brune;J. Olson;J. Crawford;A. Fried;L. Huey;R. Cohen;B. Heikes;H. Singh
通讯作者：
J. Mao;X. Ren;W. Brune;J. Olson;J. Crawford;A. Fried;L. Huey;R. Cohen;B. Heikes;H. Singh
影响因子：
--
作者：
Jianzhong Ma;Xiuji Zhou;D. Hauglustaine
通讯作者：
Jianzhong Ma;Xiuji Zhou;D. Hauglustaine