Constraining regional greenhouse gas emissions using geostationary concentration measurements: a theoretical studyAtmospheric Measurement Techniques, 7, 3285-3293, 2014Author(s): P. J. Rayner, S. R. Utembe, and S. CrowellWe 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.
Setki tysięcy abstraktów z prac naukowych, które ukazały się w okresie styczeń 2014 r. - 5 października 2014 r. i wiele więcej.