Location
East-West Center, University of Hawai'i at Manoa (Honolulu, Hawai'i)
Start Date
18-10-2012 9:40 AM
End Date
18-10-2012 10:00 AM
Document Type
Event
Description
Tandem optical particle counters (OPC) were launched by balloon, from Biak 1 0 S, 136 0 E in January 2011 and 2012. One of the tandem OPC directly observed size distribution of aerosols of 0.3 – 7 µm in diameter, and another one observed size distributions in heated conditions of 100 0 , 150 0 , and 200 0 C through thermodenuder, to observe volatility of TTL aerosols. Most of TTL aerosol smaller than 0.8 µm in diameter show high volatility, suggesting to be composed of sulfuric acid or sulfate. There also exist non-volatile particles larger than 0.8 µm in diameter, suggesting a composition of sea salt or volcanic ash. Number concentrations of non-volatile aerosol are similar to those of cloud particles in TTL.
Volatility and composition of TTL aerosols by balloon-borne in-situ observation (Powerpoint Slides)
Volatility and composition of TTL aerosols by balloon-borne in-situ observation
East-West Center, University of Hawai'i at Manoa (Honolulu, Hawai'i)
Tandem optical particle counters (OPC) were launched by balloon, from Biak 1 0 S, 136 0 E in January 2011 and 2012. One of the tandem OPC directly observed size distribution of aerosols of 0.3 – 7 µm in diameter, and another one observed size distributions in heated conditions of 100 0 , 150 0 , and 200 0 C through thermodenuder, to observe volatility of TTL aerosols. Most of TTL aerosol smaller than 0.8 µm in diameter show high volatility, suggesting to be composed of sulfuric acid or sulfate. There also exist non-volatile particles larger than 0.8 µm in diameter, suggesting a composition of sea salt or volcanic ash. Number concentrations of non-volatile aerosol are similar to those of cloud particles in TTL.
