Enhanced sulfate formation by nitrogen dioxide: Implications from in situ observations at the SORPES station
Enhanced sulfate formation by nitrogen dioxide: Implications from in situ observations at the SORPES station
复制标题
二氧化氮增强硫酸盐形成:SORPES 站现场观测的影响
DOI:
10.1002/2015jd023607
复制
发表时间:
2015-12
期刊:
影响因子:
--
通讯作者:
Congbin Fu
中科院分区:
文献类型:
--
作者:
Jianning Sun;Xiuqun Yang;Markku Kulmala;Congbin Fu
Investigating sulfate formation processes is important not only for air pollution control but also for understanding the climate system. Although the mechanisms of secondary sulfate production have been widely studied, in situ observational evidence implicating an important role of NO2 in SO2 oxidation in the real atmosphere has been rare. In this study, we report two unique cases, from an intensive campaign conducted at the Station for Observing Regional Processes of the Earth System (SORPES) in East China, showing distinctly different mechanisms of sulfate formation by NO2 and related nitrogen chemistry. The first case occurred in an episode of mineral dust mixed with anthropogenic pollutants and especially high concentrations of NOx. It reveals that NO2 played an important role, not only in surface catalytic reactions of SO2 but also in dust‐induced photochemical heterogeneous reactions of NO2, which produced additional sources of OH radicals to promote new particle formation and growth. The second case was caused by aqueous oxidation of S(IV) by NO2 under foggy/cloudy conditions with high NH3 concentration. As a by‐product, the formed nitrite enhanced HONO formation and further promoted the gas‐phase formation of sulfate in the downwind area. This study highlights the effect of NOx in enhancing the atmospheric oxidizing capacity and indicates a potentially very important impact of increasing NOx on particulate pollution formation and regional climate change in East Asia.
登录
查看更多内容
DOI:
--
发表时间:
1982
期刊:
--
影响因子:
--
作者:
Y. N. Lee;S. Schwartz
通讯作者:
Y. N. Lee;S. Schwartz
DOI:
--
发表时间:
2009
期刊:
--
影响因子:
--
作者:
S. Clegg;P. Brimblecombe;A. Wexler
通讯作者:
S. Clegg;P. Brimblecombe;A. Wexler
影响因子:
5
作者:
Peng Cheng;Yafang Cheng;Yuanhang Zhang;Hang Su;Jacob Slanina;Xuesong Wang;Shuofei Dong;Min Shao;Limin Zeng;Alfred Wiedensohler
通讯作者:
Alfred Wiedensohler
影响因子:
7.4
作者:
Y. Bai;G. Thompson;S. Martínez-Ramírez
通讯作者:
Y. Bai;G. Thompson;S. Martínez-Ramírez
影响因子:
8.8
作者:
G. Lammel;G. Metzig
通讯作者:
G. Lammel;G. Metzig