Multiyear accumulation and temperature history near the North Greenland Ice Core Project site

摘要: This paper presents a comparison of two independent methods estimating subseasonal accumulation across the interior Greenland. These methods, high- resolution snow pit studies and atmospheric modeling, have differing spatial temporal resolution, but both can estimate net for shorter periods. The approach is based on documented relationship between high-resolution profiles oxygen stable isotope ratio (8SO) multiyear Special Sensor Microwave/Imager (SSM/I) 37-GHz brightness temperature records. Comparison SSM/I data to obtained during 1995 Alfred Wegener Institut North Greenland Traverse field season shows that iiiSO from in north central are reliable, proxy. enables determination amount, rate, timing approximately July 1991 through June this 220- km-long transect ice sheet. Precipitation estimates derived early modeling European Centre Medium-Range Weather Forecasts show similar average seasonal pattern diminished magnitude (-56%) these sites. slope T versus iii correlation was evaluated each site basis observed calculated history nearby Ice core Project (NGRIP) automatic weather station. should assist interpretation paleoclimatic record NGRIP deep core.