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.
@article{arxiv.1812.00028,
title = {Site testing study based on weather balloons measurements},
author = {E. Aristidi and A. Agabi and M. Azouit and E. Fossat and J. Vernin and T. Sadibekova and T. Travouillon and J. S. Lawrence and B. Halter and W. L. Roth and V. P. Walden},
journal= {arXiv preprint arXiv:1812.00028},
year = {2018}
}