This Project is supported by a generous grant from the
Dan and Betty Churchill Exploration Fund
July 6th to 24th, 2006
Journal entries and photos
Previous work on an ice core recovered in 1980 from Mt. Logan (Holdsworth et al, 1991, Holdsworth and Krause, 2002) has shown that major discontinuities in the variation of the water stable isotope ratios with altitude, which are believed to be derived from a multilayered atmosphere during precipitation events on high altitude glacier sites. To properly interpret the glaciochemical records developed from the new St. Elias ice cores, calibration of snow properties with meteorological data (temperature, precipitation, and sea level pressure) is critical. At the Divide Site, two automatic weather stations (AWS) have been operating since 2002, collecting snow depth as well as standard meteorological data. Therefore, the timing of snow accumulation over the past 4 years is known precisely, providing a unique opportunity to investigate the atmospheric controls on snow deposition and chemistry in the St. Elias Mountains.
heric controls on snow deposition and chemistry in the St. Elias Mountains.