Back to Search
Start Over
Site testing study based on weather balloons measurements
- Source :
- EAS Publications Series, Volume 14, 2005, pp.227-232
- Publication Year :
- 2018
-
Abstract
- We present wind and temperature profiles at Dome C measured by balloon born sonds during the polar summer. Data from 197 flights have been processed for 4 campaigns between 2000 and 2004. We show the exceptionnal wind conditions at Dome C, Average ground wind speed is 3.6 m/s. We noticed in mid-november the presence of high altitude strong winds (40 m/s) 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{\deg}C over 50 m) around midnight. Wind profiles are compared with other astronomical sites, and with a meteorological model from Meteo France.
Details
- Database :
- arXiv
- Journal :
- EAS Publications Series, Volume 14, 2005, pp.227-232
- Publication Type :
- Report
- Accession number :
- edsarx.1812.00028
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1051/eas:2005035