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Microwave observations of stratospheric trace species within the scope of the "Network for the Detection of Stratospheric Change" (NDSC)

The aim of the microwave observations are the stratospheric measurements of ozon, chlorine monoxide, and water vapour above the Koldewey station. Microwave radiometers are part of the standard instrumentation at primary NDSC stations and are due to their long-term stability and self calibrating technique especially useful for monitoring purposes. A

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Project date

Starts
1993-01-01

Ends
2014-09-30

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Summary

The aim of the microwave observations are the stratospheric measurements of ozon, chlorine monoxide, and water vapour above the Koldewey station. Microwave radiometers are part of the standard instrumentation at primary NDSC stations and are due to their long-term stability and self calibrating technique especially useful for monitoring purposes. Altitude profiles are retrieved from the shape of the pressure broadened thermally induced emission line of the observed species. The instruments for the observation of stratospheric ozone, chlorine monoxide and water vapour were developed at the University of Bremen, and upgrades and improvements are regularly carried out. Project leader and responsible scientists are Prof. Dr. Justus Notholt and Dr. Harry Küllmann of the University of Bremen, respectivily. The instrument has been automated during recent years and ozone and water vapour observation on Spitsbergen are carried out year round. Chlorine monoxide is only observed in late winter and early spring, when enhanced concentrations in the lower stratosphere are to be expected. Routine operation and maintenance are taken care of by the station engineer. Data analysis is done at the University of Bremen.

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