Leipzig 2002 – scientific programme
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UP: Umweltphysik
UP 9: Atmosphäre, Aerosole, Klima - Poster
UP 9.9: Poster
Monday, March 18, 2002, 16:30–18:00, Galerie 1
Measurements of stratospheric chlorine monoxide and water vapour in Ny-Ålesund, Spitsbergen — •Kai Lindner1, Michael Hoock1, Ingo Wohltmann1, Klaus F. Künzi1, and Otto Schrems2 — 1Institut für Umweltphysik, Bremen — 2Alfred-Wegener-Institut für Polar- und Meeresforschung, Bremerhaven
The Radiometer for Atmospheric Measurements (RAM) is a passive microwave radiometer, which measures thermal emission from rotational lines of water vapour at 22 GHz, ozone at 142 GHz and chlorine monoxide at 204 GHz. The instrument is jointly operated by the Institute of Environmental Physics of the University of Bremen and the Alfred-Wegener-Institute for Polar and Marine Research. The RAM is located at the primary Arctic NDSC station in Ny-Ålesund at the Spitsbergen archipelago.
The RAM is presently the only instrument in the Arctic allowing a continuous monitoring of stratospheric ozone and related species such as ClO. We will discuss measurements of stratospheric chlorine monoxide collected in winter 2000/2001 and we will show measured diurnal cycles and compare our data to results obtained by other instruments and models.
In the last decades stratospheric water vapour has increased noticeably in the lower stratosphere, an effect, which cannot be explained by current theories. The newly installed water vapour radiometer is operational since January 1999. We will show preliminary water vapour measurements, which have been acquired using the total power method.