Physical Properties of Marine Aerosols Measured on the R/V Mirai During ACE-Asia
Abstract
In order to study the process of aerosol transport from continental to the ocean, aerosol sampling and counting on surface and with kytoon system were performed in the Japanese ACE-Asia cruise, the R/V Mirai MR01-K02 (Japan Marine Science and Technology) over the Eastern region from Japan Islands during the periods from 14 to 28 May 2001. Various observations were started from Yokosuka to the point, 32 N, 152.5 E and heading northward along the 146.5 E line from 30 N to 38 N between 17 and 27 May, and returned to Sekinehama on 28 May. Radon and thoron concentrations and aerosol size distribution with SMPS (3936N25) and two OPCs (RION KC18, KC01D) were measured on surface continuously. They decreased as leaving from the Japan Islands. Size dependent lifetime of aerosols was obtained from these data. After passing a low pressure system, the radon and super-micron aerosol concentration increased on 18 May, which was predicted by the Chemical Weather Forecasting System (CFORS). Kytoon observation was performed at eight times along the 146.5 E line. Measurement of vertical profile up to 1000 m with OPC sonde (RION KR12) and sampling at the highest level with impactor were performed. Seven vertical profiles showed the decreasing or uniform concentration with the height increasing. However, the profile on 26 May showed the high concentration in the upper layer between 600 and 1000 m. Comparing the model prediction by the CFORS, this air mass seemed to be sulfate aerosol plumes from the Asian continent.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2001
- Bibcode:
- 2001AGUFM.A22A0084M
- Keywords:
-
- 0305 Aerosols and particles (0345;
- 4801);
- 0368 Troposphere: constituent transport and chemistry;
- 3307 Boundary layer processes;
- 3339 Ocean/atmosphere interactions (0312;
- 4504)