Fourier transform spectrometer measurements of column CO<sub>2</sub> at Sodankylä, Finland
Fourier transform spectrometer (FTS) observations at Sodankylä, Finland (67.4° N, 26.6° E) have been performed since early 2009. The FTS instrument is participating in the Total Carbon Column Observing Network (TCCON) and has been optimized to measure abundances of the key greenhouse gases in the at...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2016-07-01
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| Series: | Geoscientific Instrumentation, Methods and Data Systems |
| Online Access: | http://www.geosci-instrum-method-data-syst.net/5/271/2016/gi-5-271-2016.pdf |
| Summary: | Fourier transform spectrometer (FTS) observations at Sodankylä, Finland
(67.4° N, 26.6° E) have been performed
since early 2009. The FTS instrument is participating in the Total Carbon
Column Observing Network (TCCON) and has been optimized to measure
abundances of the key greenhouse gases in the atmosphere. Sodankylä is
the only TCCON station in the Fennoscandia region. Here we report the
measured CO<sub>2</sub> time series over a 7-year period (2009–2015) and
provide a description of the FTS system and data processing at
Sodankylä. We find the lowest monthly column CO<sub>2</sub> values in August
and the highest monthly values during the February–May season.
Inter-annual variability is the highest in the June–September period, which
correlates with the growing season. During the time period of FTS
measurements from 2009 to 2015, we have observed a 2.2 ± 0.2 ppm
increase per year in column CO<sub>2</sub>. The monthly mean column CO<sub>2</sub> values have exceeded 400 ppm level for the first time in February 2014. |
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| ISSN: | 2193-0856 2193-0864 |