Year: 2005
Type: article
Abstract: We present wind and temperature profiles at Dome C measured during the polar summer by balloon born sonds. Data from 197 flights have been processed for 4 campaigns between 2000 and 2004. We show the exceptionnal wind conditions at Dome C: averaged ground wind speed is 3.6 m s-1. We noticed in mid-november the presence of high altitude strong winds (40 m s-1) probably due to the polar vortex which disappear in summer. These winds seem to have no effect on seeing measurements made with a DIMM at the same period. Temperature profiles exhibit a minimum at height 5500 m (over the snow surface) that defines the tropopause. Surface layer temperature profile has negative gradient in the first 50 m above ground in the afternoon and a strong inversion layer (5°C over 50 m) around midnight. Wind profiles are compared with other astronomical sites, and with a meteorological model from Meteo France.
Source: EAS Publications Series
DOI: 10.1051/eas:2005035
Authors: E. Aristidi, A. Agabi, M. Azouit, E. Fossat, J. Vernin, T. Sadibekova, T. Travouillon, J. S. Lawrence, B. Halter, W. L. Roth, V. P. Walden
Institutions: Université Côte d'Azur, UNSW Sydney, University of Idaho
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2145355671