Site testing study based on weather balloons measurements
| Autor: | T. Sadibekova, W. L. Roth, Jean Vernin, Eric Aristidi, Eric Fossat, M. Azouit, Tony Travouillon, Von P. Walden, B. Halter, A. Agabi, Jon Lawrence |
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| Přispěvatelé: | Laboratoire Hippolyte Fizeau (FIZEAU), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2005 |
| Předmět: |
020209 energy
General Engineering FOS: Physical sciences Astronomy and Astrophysics 02 engineering and technology Effects of high altitude on humans Weather balloon Atmospheric sciences Snow 01 natural sciences Wind speed Physics - Atmospheric and Oceanic Physics 13. Climate action Space and Planetary Science Polar vortex Atmospheric and Oceanic Physics (physics.ao-ph) 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Polar Surface layer Tropopause Astrophysics - Instrumentation and Methods for Astrophysics Instrumentation and Methods for Astrophysics (astro-ph.IM) 010303 astronomy & astrophysics Geology |
| Zdroj: | 2004, France 2005, France |
| ISSN: | 1638-1963 1633-4760 |
| DOI: | 10.1051/eas:2005035 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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