17:15 〜 18:30
[AAS11-P12] 2016年1月に気球搭載光散乱粒子計数装置で観測されたタラワ上空の成層圏最下部不揮発性エアロゾル層
キーワード：熱帯対流圏界面層、成層圏、エアロゾル、揮発性
Size distributions and volatility of aerosols in the Tropical Tropopause Layer (TTL) over Tarawa (1.5 oS, 173.0 oE) were observed using balloon-borne dual optical particle counters (OPC) in January 2016. One OPC observed number concentration of ambient aerosols and another OPC observed aerosol size distribution denuded at 200 oC, in order to discuss volatility of aerosls.
Unusual aerosol layer was found in the stratosphere from 18 to 22 km in altitude. The layer was divided into two sub-layers. Upper layer was characterized by smaller high volatile aerosol, and lower one by mixture with larger submicron un-volatile aerosol. The feature was similar to fresh volcanic aerosol layer, however we did not find any report of large volcanic eruption in 2015. We will discuss about origin of the layer.
Unusual aerosol layer was found in the stratosphere from 18 to 22 km in altitude. The layer was divided into two sub-layers. Upper layer was characterized by smaller high volatile aerosol, and lower one by mixture with larger submicron un-volatile aerosol. The feature was similar to fresh volcanic aerosol layer, however we did not find any report of large volcanic eruption in 2015. We will discuss about origin of the layer.