Analyzing composition and trends of the Asian Tropopause Aerosol Layer

亚洲季风是从地球上污染最严重的地区之一进入平流层的通道，它对气候的影响目前是一个高度讨论的话题。特别是最近通过卫星测量发现亚洲季风反气旋（ATAL）的气溶胶浓度增加，这在1998年以前是没有发现的。中期评估尚未得到充分分析，是拟议项目的主题。在过去的几个月/一年里，一架研究飞机和气球上的高分辨率仪器精确地测量了亚洲季风地区的气溶胶成分、大小、形状和浓度。这些新的测量结果补充了基于卫星的更广泛的测量结果。在拟议的项目期间，将结合各种卫星测量和高分辨率空中原位测量，比较和分析ATAL的性质（数量、化学成分和趋势）。此外，这些获得的信息将得到实施，并为由两个大气模式组成的更广泛的模式研究作出贡献，从而提高我们对ATAL为何发展、其对气候的影响以及其源区的认识。该项目将提高我们对亚洲季风、亚洲季风在地球大气中的作用及其对气候的影响的认识。

The Asian monsoon, a pathway from one of the highest polluted regions on Earth into the stratosphere and its impact on the climate is currently a highly discussed topic. Especially enhanced aerosol concentrations in the Asian monsoon anticyclone (ATAL) have recently been found with satellite measurements and have not been detected before 1998. The ATAL has not sufficiently been analyzed yet and is subject of the proposed project. During the past months/year high resolution instruments on board a research aircraft and balloons obtained aerosol measurements in terms of composition, size, shape and concentration exactly in the area of interest, the Asian monsoon. Those new measurements complement the wider picture of satellite based measurements. During the proposed project various satellite measurements and the highly resolved airborne insitu measurements will be combined, compared and analyzed for the properties of the ATAL (quantity, chemical composition and trend). Furthermore, those obtained information will be implemented and contributed to a wider model study comprised of two atmospheric models, improving our knowledge about why the ATAL developed, what its impact is on the climate and what its source regions are. The project will improve our knowledge about the ATAL, the Asian monsoon, its role in the Earth’s atmosphere and its impact on the climate.