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| Titel |
FTS Measurements of Carbon Dioxide and Methane at Sodankylä, Finland |
| VerfasserIn |
Rigel Kivi, Pauli Heikkinen, Juha Hatakka, Tuomas Laurila, Simo Tukiainen, Huilin Chen |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250148173
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| Publikation (Nr.) |
 EGU/EGU2017-12407.pdf |
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| Zusammenfassung |
| Measurements of column CO2 and CH4 have been performed at Sodankylä (67.4∘ N, 26.6∘
E) since February 2009 using a Fourier Transform Spectrometer (FTS), operating in the
near-infrared spectral region. Sodankylä is one of the stations participating in the Total
Carbon Column Observing Network (TCCON), thus our measurements include
column-averaged, dry-air mole fractions of carbon dioxide (XCO2) and methane
(XCH4). During the seven-year period of observations from year 2009 until 2015 we
observed a positive trend of 2.2 ± 0.2 ppm per year in XCO2 and 7.1 ± 0.8 ppb yr−1 in
XCH4. Our data have also contributed to the validation of space borne measurements.
In case of the Greenhouse gases Observing SATellite (GOSAT) observations the
relative difference in XCO2 has been -0.04 ± 0.02 % and the relative difference
in XCH4 has been -0.09 ± 0.03 %. In situ profile observations over Sodankylä
have been performed using balloon borne AirCore sondes. The method provides
vertical profiles of gas concentration in the troposphere and lower stratosphere and
is used to evaluate the accuracy of the FTS retrievals. Here we present AirCore
measurements of CO2, CH4, CO and column comparisons with the FTS measurements. |
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