Vertical distributions of particles and sulfur gases (volatile sulfur compounds and SO2) over East Asia: Comparison with two aircraft-borne measurements under the Asian continental outflow in spring and winter
Vertical distributions of particles and sulfur gases (volatile sulfur compounds and SO2) over East Asia: Comparison with two aircraft-borne measurements under the Asian continental outflow in spring and winter
复制标题
DOI：
10.1016/j.atmosenv.2005.09.055
复制
发表时间：
2006
影响因子：
5
通讯作者：
Y. Inomata;Y. Iwasaka;K. Osada;M. Hayashi;I. Mori;M. Kido;K. Hara;T. Sakai
中科院分区：
文献类型：
--
作者：
Y. Inomata;Y. Iwasaka;K. Osada;M. Hayashi;I. Mori;M. Kido;K. Hara;T. Sakai
我们给出了1996年4月23日和1995年12月28日日本海岸和卡萨湾的颗粒物、挥发性硫化物、二氧化硫、臭氧和硫组分在0.5-5.5公里之间的垂直分布。这些测量结果的比较表明，1996年4月23日的对流层颗粒和短期硫磺气体(CS2、H_2S、SO_2)的自由浓度显著高于1995年12月28日的浓度。聚类等熵反向轨迹分析和气象资料表明，这种差异与气团输送路线和气象条件有关。1996年4月23日，粗颗粒(矿物粉尘颗粒)被注入与沙尘暴有关的干旱地区。在西风的输送过程中，这些粗大的颗粒与工业区上空通过对流注入的短期硫磺气体混合在一起。仅限于边界层的DMS的存在表明，亚洲大陆外流在远距离输送过程中可以通过与日本海边界层中的海洋空气混合而被改变。另一方面，1995年12月28日，在3.0公里以上的高度测量到的低浓度颗粒和短期硫磺气体是由于气团下沉造成的。一些光化学处理也可能是由于低浓度的短寿命硫磺气体造成的。臭氧浓度和硫分值(SO42−/(SO42−+SO2))的垂直分布支持这一解释。除了1996年4月23日的一个样本外，长期使用的COS浓度没有显著差异。较低的COS浓度与显著较高的CS2浓度相吻合，这表明COS耗尽的气团从地表快速向上输送。
We have presented the vertical distributions, between 0.5 and 5.5km, of particles, volatile sulfur compounds, sulfur dioxide, O3, and fractions of sulfur over the Japan Sea coast, Wakasa Bay, on 23 April 1996 and 28 December 1995. Comparison of these measurements showed that free tropospheric concentrations of particles and short-lived sulfur gases (CS2, H2S, SO2) on 23 April 1996 were significantly higher than those on 28 December 1995. Clustered isentropic backward trajectory analysis and meteorological data indicated that the difference was associated with air mass transport routes and meteorological conditions. On 23 April 1996, coarse size particles (mineral dust particles) were injected over the arid region associated with dust storms. During transport by westerly winds, these coarse size particles were mixed with short-lived sulfur gases injected by convection over an industrial region. The presence of DMS, confined to the boundary layer, indicated that Asian continental outflow can be modified during long-range transport through mixing with marine air in the boundary layer over the Japan Sea. On the other hand, on 28 December 1995, low concentrations of particles and short-lived sulfur gases, measured at altitudes above 3.0km, were due to air mass subsidence. It is likely that some photochemical processing was also due to low concentrations of short-lived sulfur gases. Vertical distributions of O3concentrations and values of sulfur fraction (SO42−/(SO42−+SO2)) supported this interpretation. There was no significant difference in concentrations of long-lived COS, except for one sample on 23 April 1996. The low COS concentration coincided with significantly high concentrations of CS2, suggesting rapid upward transport of COS depleted air masses from the surface.