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The Two-Column Aerosol Project: Phase I - Overview and Impact of Elevated Aerosol Layers on Aerosol Optical DepthThe Two-Column Aerosol Project (TCAP), conducted from June 2012 through June 2013, was a unique study designed to provide a comprehensive data set that can be used to investigate a number of important climate science questions, including those related to aerosol mixing state and aerosol radiative forcing. The study was designed to sample the atmosphere be tween and within two atmospheric columns; one fixed near the coast of North America (over Cape Cod, MA) and a second moveable column over the Atlantic Ocean several hundred kilometers from the coast. The U.S. Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Mobile Facility (AMF) was deployed at the base of the Cape Cod column, and the ARM Aerial Facility was utilized for the summer and winter intensive observation periods. One important finding from TCAP is that four of six nearly cloud-free flight days had aerosol layers aloft in both the Cape Cod and maritime columns that were detected using the nadir pointing second-generation NASA high-spectral resolution lidar (HSRL-2).These layer s contributed up to 60 of the total observed aerosol optical depth (AOD). Many of these layers were also intercepted by the aircraft configured for in situ sampling, and the aerosol in the layers was found to have increased amounts of biomass burning material and nitrate compared to aerosol found near the surface. In addition, while there was a great deal of spatial and day-to-day variability in the aerosol chemical composition and optical properties, no systematic differences between the two columns were observed.
Document ID
20180000133
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Berg, Larry K. (Pacific Northwest National Lab. Richland, WA, United States)
Fast, Jerome D. (Pacific Northwest National Lab. Richland, WA, United States)
Barnard, James C. (Nevada Univ. Reno, NV, United States)
Burton, Sharon P. (NASA Langley Research Center Hampton, VA, United States)
Cairns, Brian (NASA Goddard Inst. for Space Studies New York, NY, United States)
Chand, Duli (Pacific Northwest National Lab. Richland, WA, United States)
Comstock, Jennifer M. (Pacific Northwest National Lab. Richland, WA, United States)
Dunagan, Stephen (NASA Ames Research Center Moffett Field, CA, United States)
Ferrare, Richard A. (NASA Langley Research Center Hampton, VA, United States)
Flynn, Connor J. (NASA Langley Research Center Hampton, VA, United States)
Hair, Johnathan W. (NASA Langley Research Center Hampton, VA, United States)
Hostetler, Chris A. (NASA Langley Research Center Hampton, VA, United States)
Hubbe, John (Pacific Northwest National Lab. Richland, WA, United States)
Jefferson, Anne (National Oceanic and Atmospheric Administration Boulder, CO, United States)
Johnson, Roy (NASA Ames Research Center Moffett Field, CA, United States)
Kassianov, Evgueni I. (Pacific Northwest National Lab. Richland, WA, United States)
Kluzek, Celine D. (Pacific Northwest National Lab. Richland, WA, United States)
Kollias, Pavlos (McGill Univ. Montreal, Quebec, Canada)
Lamer, Katia (McGill Univ. Montreal, Quebec, Canada)
Lantz, Kathleen (Colorado Univ. Boulder, CO, United States)
Mei, Fan (Pacific Northwest National Lab. Richland, WA, United States)
Miller, Mark A. (Rutgers Univ. New Brunswick, NJ, United States)
Michalsky, Joseph (National Oceanic and Atmospheric Administration Boulder, CO, United States)
Ortega, Ivan (Colorado Univ. Boulder, CO, United States)
Pekour, Mikhail (Pacific Northwest National Lab. Richland, WA, United States)
Rogers, Ray R. (NASA Langley Research Center Hampton, VA, United States)
Russell, Philip B. (NASA Ames Research Center Moffett Field, CA, United States)
Redemann, Jens (NASA Ames Research Center Moffett Field, CA, United States)
Sedlacek, Arthur J., III (Brookhaven National Lab. Upton, NY, United States)
Segal-Rozenhaimer, Michal (Bay Area Environmental Research Inst. Moffett Field, CA, United States)
Schmid, Beat (Pacific Northwest National Lab. Richland, WA, United States)
Shilling, John E. (Pacific Northwest National Lab. Richland, WA, United States)
Shinozuka, Yohei (Bay Area Environmental Research Inst. Moffett Field, CA, United States)
Springston, Stephen R. (Brookhaven National Lab. Upton, NY, United States)
Tomlinson, Jason M. (Pacific Northwest National Lab. Richland, WA, United States)
Tyrrell, Megan (National Park Services Wellfleet, MA, United States)
Wilson, Jacqueline M. (Pacific Northwest National Lab. Richland, WA, United States)
Volkamer, Rainer (Colorado Univ. Boulder, CO, United States)
Zelenyuk, Alla (Pacific Northwest National Lab. Richland, WA, United States)
Berkowitz, Carl M. (Pacific Northwest National Lab. Richland, WA, United States)
Date Acquired
January 5, 2018
Publication Date
December 2, 2015
Publication Information
Publication: Journal of Geophysical Research: Atmospheres
Volume: 121
Issue: 1
ISSN: 2169-897X
Subject Category
Earth Resources and Remote Sensing
Report/Patent Number
GSFC-E-DAA-TN29469
Funding Number(s)
CONTRACT_GRANT: NNX12AD05A
Distribution Limits
Public
Copyright
Other
Keywords
aerosols
transferred electron devices
coasts