HR: 1340h
AN: C23A-1161    [Abstracts]
TI: A Temporal and Spatial Profile of Recent Greenland Snowfall Along the Arctic Circle
AU: * Spikes, V B
EM: vbs@earthscienceagency.com
AF: Earth Science Agency, PO Box 2858 275 Kingsbury Grade, Stateline, NV 89449
AU: McConnell, J R
EM: jmcconn@dri.edu
AF: Desert Research Institute, 2215 Raggio Parkway, Reno, NV 89512
AU: McConnell, M C
EM: cmcconnell01@fs.fed.us
AF: USFS, 3200 NW Jefferson , Corvallies, OR 97331
AB: Ground penetrating radar was used to detect internal layers along a 220 km, east-west snowmobile traverse across the Greenland ice sheet at 66N latitude. The traverse, which extends from a region of strong thickening of the ice sheet in the west to a region of strong thinning in the east, also included 5 shallow to intermediate depth ice cores. Density and high resolution glaciochemistry measurements from the ice cores, together with layer tracking of 20 continuous horizons from the radar survey, provide a unique profile of net accumulation across the ice sheet over the period 1950 to 2000. Elevation measurements from global positioning system surveys show that accumulation rates correlate highly with surface undulations. Results show that temporal changes in accumulation rate are spatially coherent and likely reflect changes in climate.
DE: 0724 Ice cores (4932)
DE: 0726 Ice sheets
DE: 0736 Snow (1827, 1863)
DE: 0738 Ice (1863)
DE: 0776 Glaciology (1621, 1827, 1863)
SC: Cryosphere [C]
MN: Fall Meeting 2005