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- W3042694170 abstract "<p>Carbon dioxide and methane column measurement at the Finnish Meteorological Institute&#8217;s Sodankyl&#228; facility in northern Finland started in early 2009. The measurements have been taken by a Fourier Transform Spectrometer (FTS) in the near-infrared spectral region. From the spectra column-averaged abundances of CO<sub>2</sub>, CH<sub>4</sub> and other gases are derived. The instrument participates in the Total Carbon Column Observing Network (TCCON).&#160; Here we present long-term ground based FTS measurements of carbon dioxide and methane and comparisons with satellite borne observations. We find that CO<sub>2</sub> column amounts have increased by 2.2 &#177; 0.1 ppm/year since the start of the measurements in 2009 and CH<sub>4</sub> column amounts have increased by 7 &#177; 0.4 ppb/year. The measurements are in good agreement with multi-year measurements by the Greenhouse Gases Observing Satellite (GOSAT): the relative difference in XCH<sub>4</sub> has been -0.07 &#177; 0.02 % and the relative difference in XCO<sub>2</sub> has been 0.04 &#177; 0.02 %. Finally we use balloon borne AirCore observations at the Sodankyl&#228; site to provide comparisons between FTS and in situ observations during all seasons.</p>" @default.
- W3042694170 created "2020-07-23" @default.
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- W3042694170 date "2020-03-10" @default.
- W3042694170 modified "2023-09-26" @default.
- W3042694170 title "Atmospheric Carbon Dioxide and Methane measurements at Sodankylä, Finland" @default.
- W3042694170 doi "https://doi.org/10.5194/egusphere-egu2020-13106" @default.
- W3042694170 hasPublicationYear "2020" @default.
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