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| Titel |
Constraining regional greenhouse gas emissions using geostationary concentration measurements: a theoretical study |
| VerfasserIn |
P. J. Rayner, S. R. Utembe, S. Crowell |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 7, no. 10 ; Nr. 7, no. 10 (2014-10-02), S.3285-3293 |
| Datensatznummer |
250115918
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| Publikation (Nr.) |
 copernicus.org/amt-7-3285-2014.pdf |
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| Zusammenfassung |
| We investigate the ability of column-integrated trace gas measurements from a
geostationary satellite to constrain surface fluxes at regional scale. The
proposed GEOCARB instrument measures CO2, CO and CH4 at a maximum
resolution of 3 km east–west × 2.7 km north–south. Precisions are
3 ppm for CO2, 10 ppb for CO and 18 ppb for CH4. Sampling frequency
is flexible. Here we sample a region at the location of Shanghai every 2
daylight hours for 6 days in June. We test the observing system by
calculating the posterior uncertainty covariance of fluxes. We are able to
constrain urban emissions at 3 km resolution including an isolated
power plant. The CO measurement plays the strongest role; without it our
effective resolution falls to 5 km. Methane fluxes are similarly
well estimated at 5 km resolution. Estimating the errors for a full year
suggests such an instrument would be a useful tool for both science and
policy applications. |
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