• Acronyme :
  • Référence :
  • Domaine de recherche :
    Sciences de la Terre et de l'Univers
  • Région :
    Antarctique, Concordia
  • Responsable du projet :
    Ricaud Philippe

H2O Antarctica Microwave Stratospheric and Tropospheric Radiometers

The HAMSTRAD radiometer is a genuine state-of-the-art microwave instrument dedicated for the detection of 1) the 60-GHz oxygen line to measure tropospheric temperature profile, and 2) the 183-GHz water vapour line to get tropospheric H2O from the surface to about 10 km altitude with a time resolution of about 7 minutes. In January 2009, HAMSTRAD was installed outdoor at Dome C for 12 days. The radiometer has been definitively deployed inside a dedicated shelter in January 2010 and is working since then except during the period June 2011-February 2012 due to an instrument failure. The fully automated instrument needs a liquid nitrogen calibration once/twice per year. Data recorded since 2009 have been intensively analyzed and scientific results have been published (10 peer-reviewed papers). The aim of the HAMSTRAD project is to measure the trends in water vapour and temperature profiles from the lower part of the troposphere to the lower part of the stratosphere and their links with climate change. It is also intended to study the water budget (solid/liquid and vapour) above Dome C combining different measurements performed at the station and in the vicinity (satellites) and models.