Comparing GOSAT observations of localized CO₂ enhancements by large emitters with inventory-based estimates

Autor(en)

Rajesh Janardanan, Shamil Maksyutov, Tomohiro Oda, Makoto Saito, Johannes W. Kaiser, Alexander Ganshin, Andreas Stohl, Tsuneo Matsunaga, Yukio Yoshida, Tatsuya Yokota

Abstrakt

We employed an atmospheric transport model to attribute column-averaged CO₂ mixing ratios (X_CO2) observed by Greenhouse gases Observing SATellite (GOSAT) to emissions due to large sources such as megacities and power plants. X_CO2 enhancements estimated from observations were compared to model simulations implemented at the spatial resolution of the satellite observation footprint (0.1° × 0.1°). We found that the simulated X_CO2 enhancements agree with the observed over several continental regions across the globe, for example, for North America with an observation to simulation ratio of 1.05 ± 0.38 (p < 0.1), but with a larger ratio over East Asia (1.22 ± 0.32; p < 0.05). The obtained observation-model discrepancy (22%) for East Asia is comparable to the uncertainties in Chinese emission inventories (∼15%) suggested by recent reports. Our results suggest that by increasing the number of observations around emission sources, satellite instruments like GOSAT can provide a tool for detecting biases in reported emission inventories.

Organisation(en)

Institut für Meteorologie und Geophysik

Externe Organisation(en)

National Institute for Environmental Studies, National Aeronautics & Space Administration (NASA), Universities Space Research Association, Max-Planck-Institut für Chemie (Otto-Hahn-Institut), Tsentral'naya Aerologicheskaya Observatoriya Rosgidromet, Tomsk State University, Norwegian Institute for Air Research

Journal

Geophysical Research Letters

Band

43

Seiten

3486-3493

Anzahl der Seiten

8

ISSN

0094-8276

DOI

https://doi.org/10.1002/2016GL067843

Publikationsdatum

04-2016

Peer-reviewed

Ja

ÖFOS 2012

105206 Meteorologie

Schlagwörter

ASJC Scopus Sachgebiete

Geophysics, Earth and Planetary Sciences(all)

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/comparing-gosat-observations-of-localized-co2-enhancements-by-large-emitters-with-inventorybased-estimates(883e4a52-8381-43fb-8282-75c4ab8358b0).html