Journal
JOURNAL OF ENVIRONMENTAL MONITORING
Volume 7, Issue 5, Pages 488-492Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b416934d
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In situ methane (CH4) measurement techniques and data from the Zeppelin Station in Ny-angstrom lesund on Svalbard (N 78 degrees 54' E 11 degrees 53') on Mt. Zeppelin (475 m.a.s.l) are presented. The data span the time period from October 1998 to December 2003, though not continuously. The daily mean was calculated from 96 samples per day which are analysed by gas chromatography with flame ionisation detection. Details of the experimental methods and procedures are given. A harmonic function is fitted to the data with a constant trend and seasonal amplitude. The data are also presented in a regression plot showing the difference between the in situ measurements and. ask measurements from the National Oceanic and Atmospheric Administration of the Climate Monitoring and Diagnostics Laboratory (NOAA/CMDL) in Boulder, Colorado (http://www.cmdl.noaa.gov/). The Zeppelin data show typical Arctic air characteristics with wintertime pollution episodes from Europe and Russia and a relatively calm summer state.
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