Effects of aerosol organics on cloud condensation nucleus (CCN) concentration and first indirect aerosol effect

Journal Article · Mon Nov 03 04:00:00 EST 2008 · Atmospheric Chemistry and Physics, 8(21):6325-6339

DOI:https://doi.org/10.5194/acp-8-6325-2008· OSTI ID:949936

Wang, J X; Lee, Y - N; Daum, Peter H; Jayne, John T; Alexander, M L

Abstract. Aerosol microphysics, chemical composition, and CCN properties were measured on the Department of Energy Gulfstream-1 aircraft during the Marine Stratus/ Stratocumulus Experiment (MASE) conducted over the coastal waters between Point Reyes National Seashore and Monterey Bay, California, in July 2005. Aerosols measured during MASE included free tropospheric aerosols, marine boundary layer aerosols, and aerosols with high organic concentration within a thin layer above the cloud. Closure analysis was carried out for all three types of aerosols by comparing the measured CCN concentrations at 0.2% supersaturation to those predicted based on size distribution and chemical composition using K¨ohler theory. The effect of aerosol organic species on predicted CCN concentration was examined using a single hygroscopicity parameterization.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 949936
• Report Number(s): PNNL-SA-64108; 24697; KP1504020
• Journal Information: Atmospheric Chemistry and Physics, 8(21):6325-6339, Journal Name: Atmospheric Chemistry and Physics, 8(21):6325-6339 Journal Issue: 21 Vol. 8
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AEROSOLS
BOUNDARY LAYERS
CALIFORNIA
CHEMICAL COMPOSITION
CLOUDS
COASTAL WATERS
DISTRIBUTION
Environmental Molecular Sciences Laboratory
HYGROSCOPICITY
ORGANIC COMPOUNDS
SUPERSATURATION