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| Titel |
Constraining Carbon Surface Fluxes with GOSAT Column Observations of CO2 and CH4 |
| VerfasserIn |
Kristiina Byckling, Hartmut Boesch, Robert Parker, Alex Webb, Paul Palmer, Liang Feng, Annemarie Fraser |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250079748
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| Zusammenfassung |
| The first dedicated greenhouse gas sensor GOSAT was launched in 2009 and we have now
global GOSAT soundings of CO2 and CH4 columns for more than four years. Much progress
has been achieved in instrument calibration, spectroscopy and retrieval algorithm
development and retrievals of CO2 and CH4 approach now accuracies of around 0.3% when
compared to ground-based validation sites, but some regions that lack validation sites such as
deserts tend to show somewhat larger biases. The GOSAT column data has now sufficient
accuracy to provide constraints on surface fluxes especially when used in combination with
surface data
In this presentation we will describe the recent updates to the CO2 and CH4 retrievals
from GOSAT carried out at University of Leicester and we will give a characterization of
errors from comparisons to ground-based column retrievals from the Total Carbon Column
Observing Network (TCCON). We report regional monthly CH4 and CO2 fluxes from
GOSAT column data using an ensemble Kalman filter (EnKF) and the GEOS-Chem
chemistry transport model and compare these posterior values against those inferred from
surface mole fraction data. |
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