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Ny Ålesund

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Since March 1992 FTIR measurements are performed regularly using the sun at light source. The measurements at our Arctic research station are performed within the NDACC (Network for the Detection of Atmospheric Composition Change, formerly NDSC). The station in Ny-Ålesund has been accepted as one of the worldwide five primary NDACC stations and the FTIR-observations are part of the Total Carbon Column Observing Network (TCCON). This recently established network sets high demands on the precision of the measurements consists of five sites. It is expected to play a similar role for greenhouse gases as the Network for Detection of Stratospheric Change (NDSC) has played for the understanding of ozone depletion.. At the latitude of Ny-Ålesund the sun is below the horizon between the middle of October and the middle of March. In December 1992 the system has been modified to use additionally the moon as light source during the polar night. In April the system has been further developed to record spectra in the UV/VIS. Beside the absorption studies the instrument is used to record spectra in emission. Beside some trace gases this allowed to record the optical depth in the infrared and to study atmospheric aerosols, like the Arctic haze.
Last Updated ( Wednesday, 10 December 2008 14:55 )