DISTRIBUTION OF MEAN δ^<18>O VALUES OF SURFACE SNOW LAYERS AND THEIR DEPENDENCE ON AIR TEMPERATURE IN ENDERBY LAND-EAST QUEEN MAUD LAND, ANTARCTICA

• Main Authors: サトウ カズヒデ, ワタナベ オキツグ, Kazuhide SATOW, Okitsugu WATANABE
• Format: Report
• Language: English
• Published: Nagaoka National College of Technology 1992
• Subjects: East Antarctica; Queen Maud Land; Antarc*; Antarctica; Enderby Land; Polar meteorology and glaciology; Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3705; http://id.nii.ac.jp/1291/00003705/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3705&item_no=1&attribute_id=18&file_no=1

Oxygen isotope analyses of surface snow layers have been carried out in Enderby Land-East Queen Maud Land, East Antarctica. The δ^<18>O values decrease with various parameters including elevation (E : m), distance from the coast (L : km) : [δ^<18>O(‰)=-0.0069E-0.0126L-18.5], and in particular with mean annual surface temperatures (T : ℃), according to a good linear relationship [δ^<18>O(‰)=0.834T-8.7] in the temperature range from -20 to -55℃. The relationship with temperature is similar to that derived from a simple model in which an air mass is progressively cooled under Rayleigh conditions as it moves toward the inland plateau. This also suggests that δ^<18>O values are very closely related to condensation temperature at the top of the inversion layer where snowfall precipitation is formed.