A41K-0231
Utilizing SO2/CO2 Mixing Ratios to Determine SO2 Uptake by a Regional Cloud Layer
Thursday, 17 December 2015
Poster Hall (Moscone South)
Solomon Bililign1, Jaime Ross Green1, Marc Nicholas Fiddler1, Lyatt Jaegle2, Joel A Thornton3, Steven S Brown4, Viral Shah5, Felipe Lopez-Hilfiker5, Ben H. Lee5, Jessica Haskins6, Dorothy L Fibiger7, Erin E. McDuffie8, Tamara Sparks9, Carlena J Ebben9, Paul J Wooldridge10, Ronald C Cohen9, Patrick R Veres4, Andrew John Weinheimer11, Jack E Dibb12, Jason Clay Schroder13, Douglas A Day14, Jose L Jimenez15, Amy Sullivan16, Hongyu Guo17, Rodney J Weber18, Teresa Lynn Campos11, J. Brian Leen19, Joshua P DiGangi20 and Glenn M Wolfe21, (1)North Carolina A & T State University, Physics, Greensboro, NC, United States, (2)Univ Washington, Seattle, WA, United States, (3)Univ Washington - Seattle, Seattle, WA, United States, (4)NOAA Boulder, Boulder, CO, United States, (5)University of Washington Seattle Campus, Seattle, WA, United States, (6)University of Washington Seattle Campus, Atmospheric Sciences, Seattle, WA, United States, (7)National Science Foundation, Atmospheric and Geospace Sciences Postdoctoral Fellow, Arlington, VA, United States, (8)University of Colorado at Boulder, Boulder, CO, United States, (9)University of California Berkeley, Berkeley, CA, United States, (10)UC Berkeley, Berkeley, CA, United States, (11)National Center for Atmospheric Research, Boulder, CO, United States, (12)University of New Hampshire Main Campus, Durham, NH, United States, (13)Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States, (14)CIRES, Boulder, CO, United States, (15)University of Colorado at Boulder, Dept. of Chemistry and Biochemistry, Boulder, CO, United States, (16)Colorado State University, Fort Collins, CO, United States, (17)Georgia Institute of Technology Main Campus, Earth and Atmospheric Sciences, Atlanta, GA, United States, (18)Georgia Institute of Technology Main Campus, Atlanta, GA, United States, (19)Los Gatos Research, Mountain View, CA, United States, (20)NASA Langley Research Center, Hampton, VA, United States, (21)NASA Goddard Space Flight Center, Greenbelt, MD, United States
Abstract:
The cloud uptake of SO2 during wintertime conditions over the Eastern United States is presented. In wintertime conditions in the Eastern United States there are fewer reactant sinks for gaseous SO2, as a result the atmospheric lifetime is measurably longer. An examination of the SO2/CO2 mixing ratio above and below the cloud layer in comparison to the internal concentration of gaseous CO2 inside the cloud layer will determine uptake of SO2 due to aqueous reactivity SO2/CO2. The performance of this will allow for a numerical estimate of the CO2-H2O complexes compared to the SO2-H2O complexes formed at the cloud droplet surface. The data obtained originates from a series of survey night and day flights on a C-130 aircraft that occurred from Feb 3 to Mar 13, 2015 over the Eastern coastal region of the United States ranging from New York to Florida. The following instruments were utilized in obtaining gaseous measurements; for water droplet size distribution a Condensation Nucleus Counter (CN Counter) (NCAR) and a Forward Scattering Spectrometer Probe, Model 100 (FSSP-100) (NCAR), for SO2 measurements the TECO 43C SO2 analyzer (NOAA—ESRL/NCAT) and a CO/CO2 analyzer (NCAR). An estimate and transport gaseous SO2 due to of cloud uptake in surveyed regions in the WINTER 2015 campaign will be presented.
