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- Title
Constraining regional greenhouse gas emissions using geostationary concentration measurements: a theoretical study.
- Authors
Rayner, P. J.; Utembe, S. R.; Crowell, S.
- Abstract
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.
- Subjects
GREENHOUSE gas mitigation; GEOSTATIONARY satellites; EMISSION control -- Government policy; TRACE gases; METHANE
- Publication
Atmospheric Measurement Techniques, 2014, Vol 7, Issue 9, p3285
- ISSN
1867-1381
- Publication type
Article
- DOI
10.5194/amt-7-3285-2014