HR: 0800h
AN: A11C-0075    [Abstracts]
TI: Ultra-Trace Surface Snow Chemistry at Summit Greenland: July, 2003 to August 2004
AU: * McConnell, J R
EM: jmcconn@dri.edu
AF: Desert Research Institute, 2215 Raggio Parkway, Reno, NV 89512 United States
AU: Edwards, P R
EM: redwards@dri.edu
AF: Desert Research Institute, 2215 Raggio Parkway, Reno, NV 89512 United States
AU: Kahl, J D
EM: kahl@uwm.edu
AF: University of Wisconsin-Milwaukee, P.O.Box 413, Milwaukee, WI 53201 United States
AU: Burkhart, J F
EM: jburkhart@ucmerced.edu
AF: University of California,Merced, 4225 N. Hospital Road, Bldg 1200, Atwater, CA 95344 United States
AU: Bales, R C
EM: rbales@ucmerced.edu
AF: University of California,Merced, 4225 N. Hospital Road, Bldg 1200, Atwater, CA 95344 United States
AB: From July 2003 to August 2004, replicated surface snow samples were collected each week in the clean air sector at Summit Greenland using ultra-clean sampling techniques. The samples were analyzed for a range of elements from sodium to lead by high resolution inductively coupled plasma mass spectrometry (HR-ICP-MS). Comparisons with similar continuous, high-resolution HR-ICP-MS measurements from nearby ice cores indicate that for most elements, the records are very similar. Together with continuous, high resolution air filter sample analyses and 3-D air mass back-trajectory modeling for the same time period, we used the surface snow measurements to evaluate the seasonal timing, source regions and transport pathways, and air-snow transfer characteristics for dust and pollution aerosols. These data provide important calibration for interpretation of ice cores from Greenland as long term historical proxies of atmospheric aerosol concentration and chemistry.
DE: 4805 Biogeochemical cycles (1615)
DE: 1863 Snow and ice (1827)
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0330 Geochemical cycles
DE: 0345 Pollution--urban and regional (0305)
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting