Organics in the Northeastern Pacific and their impacts on aerosol hygroscopicity in subsaturated and supersaturated regimes
MetadataShow full item record
Aerosol samples were collected by aircraft during the summer of 2004 in the Northeastern Pacific and compared to measurements of aerosol hygroscopicity. Chemical speciation analyses of the samples revealed that a significant portion of the marine aerosols was organic, and on average 8% of the total aerosol mass was insoluble organic material, tentatively attributed to natural marine emissions. Two chemical models were explored in an attempt to achieve closure between the marine aerosol chemical and physical properties through reproduction of the observed aerosol growth, both in the subsaturated and supersaturated regimes. Results suggest that at subsaturated relative humidities, the nonideal behavior of water activity with respect to aerosol chemistry has an important effect on aerosol growth. At supersaturations, the underprediction of critical supersaturations by all models suggests the hypothesis that formation of a complete monolayer by the insoluble organics may inhibit the activation of aerosols to form cloud droplets.
Showing items related by title, author, creator and subject.
Hersey, Scott P.; Craven, Jill S.; Metcalf, Andrew R.; Lin, Jack; Lathem, Terry; Suski, Kaitlyn J.; Cahill, John F.; Duong, Hanh T.; Sorooshian, Armin; Jonsson, Haflidi H.; Shiraiwa, Manabu; Zuend, Andreas; Nenes, Athanasios; Prather, Kimberly A.; Flagan, Richard C.; Seinfeld, John H. (2013);Aircraft-based measurements of aerosol composition, either bulk or single-particle, and both subsaturated and supersaturated hygroscopicity were made in the Los Angeles Basin and its outflows during May 2010 during the ...
On the Link Between Ocean Biota Emissions, Aerosol, and Maritime Clouds: Airborne, Ground, and Satellite Measurements off the Coast of California Sorooshian, Armin; Padro, Luz T.; Nenes, Athanasios; Feingold, Graham; McComiskey, Allison; Hersey, Scott P.; Gates, Harmony; Jonsson, Haflidi H.; Miller, Steven D.; Stephens, Graeme L.; Flagan, Richard C.; Seinfeld, John H. (2009);Surface, airborne, and satellite measurements over the eastern Pacific Ocean off the coast of California during the period between 2005 and 2007 are used to explore the relationship between ocean chlorophyll a, aerosol, ...
Evaluation of Daytime measurements of Aerosols and Water Vapor made by an Operational Raman Lidar over the Southern Great Plains Ferrare, Richard; Turner, David; Clayton, Marian; Schmid, Beat; Redemann, Jens; Covert, David; Elleman, Robert; Ogren, John; Andrews, Elisabeth; Goldsmith, John E.M.; Jonsson, Haflidi (2006);Raman lidar water vapor and aerosol extinction profiles acquired during the daytime over the Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) site in northern Oklahoma (36.606 ...