HR: 0800h
AN: A11A-0852    [Abstracts]
TI: Organic Matter in Cloud Water Collected in the Colorado Rocky Mountains during the 2005 North American Monsoon
AU: * Rinehart, L R
EM: lynn@atmos.colostate.edu
AF: Atmospheric Science Department, Colorado State University, Campus Delievery 1371, Fort Collins, CO 80523 United States
AU: Collett, J L
EM: collett@lamar.colostate.edu
AF: Atmospheric Science Department, Colorado State University, Campus Delievery 1371, Fort Collins, CO 80523 United States
AB: The nature and identity of organic compounds in cloud droplets is not well understood. Several studies have examined organic compounds in polluted environments; however, less is known about the organic content of clouds in remote and rural environments. To help address this issue, cloud water samples were collected on the western summit of Mt. Werner (3220m MSL) in the Park Range of northwestern Colorado during the North American monsoon in summer 2005. Measurements of cloud liquid water content, cloud pH, and cloud water concentrations of total organic carbon (TOC), dissolved organic carbon (DOC), carbohydrates, formaldehyde, low molecular weight organic acids and carbonyls, and organic nitrogen for cloud droplets will be presented and compared to previous observations in other locations. In particular, we will examine contributions of measured organic compounds to DOC. Additionally, observations of the composition of aerosol samples collected between cloud events for characterization of solvent and water soluble organic compounds, for comparison to cloud water samples, will be presented.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0320 Cloud physics and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005