Sources and sinks of H2SO4 in the remote Antarctic marine boundary layer
Sources and sinks of H2SO4 in the remote Antarctic marine boundary layer
复制标题
DOI：
10.1029/97jd01212
复制
发表时间：
1998-01-20
影响因子：
4.4
通讯作者：
Berresheim, H
中科院分区：
文献类型：
--
作者：
Jefferson, A;Tanner, DJ;Berresheim, H
利用南极对流层硫化学项目SCATE的测量数据，对南极海洋边界层中的H_2SO_4源和汇进行了稳态分析。计算表明，考虑到观察到的气相H_2SO_4所需的SO2水平约为百万分之17到300pptv(PPTV)，SO2的平均浓度为100pptv，远远高于该地区以前对SO2的测量结果，后者的范围在7pptv到17pptv之间[Berresheim，1987；Pszenny等人，1989；P.Quinn，Personal Communications，1996]。DMS通过SO2中间体的边界层氧化在该地区不足以产生H_2SO_4。H_2SO_4的可能替代来源包括边界层DMD的氧化和来自较高海拔的空气的垂直夹带。
A steady state analysis of H2SO4 sources and sinks in the Antarctic marine boundary layer was performed using measurements from project SCATE, Sulfur Chemistry in the Antarctic Troposphere Experiment. The calculations show that the SO2 levels needed to account for the observed gas phase H2SO4 ranged from about 17 to 300 parts per trillion by volume (pptv) with an average SO2 concentration of 100 pptv, far more than previous measurements of SO2 in this region which range between 7 and 17 pptv [Berresheim, 1987; Pszenny et al., 1989; P. Quinn, personal communication, 1996]. Boundary layer oxidation of DMS via an SO2 intermediate was found to be an insufficient source of H2SO4 in this region. Likely alternative sources of H2SO4 include oxidation of boundary layer DMDS and vertical entrainment of air from higher altitudes.