Aerosol Entrainment and Boundary Layer CCN: Transport and Teleconnections in the Free Troposphere
Speaker: Antony Clarke, School of Ocean and Earth Science and Technology, University of Hawaii
When: Thursday, May 24, 2012, 3:30 p.m. Mountain Time
Location: Room 2A305, DSRC (NOAA Building), 325 Broadway, Boulder
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The long range transport of anthropogenic aerosol over global scales is well recognized and evident from satellite remote sensing and diverse airborne experiments. Less appreciated is the fact that this lofted aerosol gradually subsides back toward the inversion where it becomes entrained into the marine boundary layer (MBL). This is common in large scale subsidence regions often present over the remote ocean where aerosol MBL concentrations can be low. Long range transport of aerosol "rivers" in the FT and followed by entrainment can provides teleconnections between active aerosol source regions and clouds in remote marine regions > 10,000 km distant. Data from various airborne experiments over the Pacific will be used to demonstrate this transport and entrainment of combustion-derived aerosol effective as CCN in MBL clouds. These include transport from Asia to the region of California stratus, from the Amazon to the central Equatorial Pacific and from both Australasia/South America to the extensive stratus decks over Southeast Pacific.