Aerosol flux measurement in CARES and TCAP
Authors
Gunnar I. Senum — Brookhaven National Laboratory
Jason Tomlinson — Pacific Northwest National Laboratory
Category
Aerosol Properties
Description
Aerosol particle fluxes in the boundary layer have been calculated from aircraft measurements by the ARM Aerial Facility (AAF) G-1 research aircraft for two field campaigns, the Carbonaceous Aerosols and Radiative Effects Study (CARES) and the Two-Column Aerosol Project (TCAP), when the aircraft was over land. The aerosol particle fluxes were calculated from the vertical velocities as measured by the G-1 gust probe, and the total aerosol particle concentrations were measured by the AAF ultra-high sensitivity aerosol spectrometer (UHSAS). Both measurements were determined at 10-Hz-meter resolution, which corresponds to a 10-meter spatial resolution; previous aircraft measurements at lower time resolution were not able to resolve the updrafts and downdrafts in the boundary layer, which is necessary for the aerosol flux calculation.The calculated aerosol particle fluxes for CARES as measured in Sacramento, California, and likewise for TCAP in Cape Cod, Massachusetts, will be compared with respect to different forestations at these two different sites.