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| Titel |
Climatically-Active Gases in the Eastern Boundary Upwelling and Oxygen Minimum Zone (OMZ) Systems |
| VerfasserIn |
C. Garbe, V. Garçon, A. Butz, H. Yahia, J. Sudre, S. Illig, B. Dewitte, A. Paulmier, I. Dadou |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250065573
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| Zusammenfassung |
| The EBUS (Eastern Boundary Upwelling Systems) and OMZs (Oxygen Minimum Zone)
contribute very significantly to the gas exchange between the ocean and the atmosphere,
notably with respect to the greenhouse gases (hereafter GHG). From in-situ ocean
measurements, the uncertainty of the net global ocean-atmosphere CO2 fluxes is between 20
and 30%, and could be much higher in the EBUS-OMZ. Off Peru, very few in-situ data are
available presently, which justifies alternative approaches for assessing these fluxes. GHG
air-sea fluxes determination can be inferred from inverse modeling applied to Vertical
Column Densities (VCDs) from GOSAT, using state of the art modeling, at low spatial
resolution. For accurately linking sources of GHGs to EBUS and OMZs, the resolution of the
source regions needs to be increased. This task develops on new non-linear and multiscale
processing methods for complex signals to infer a higher spatial resolution mapping
of the fluxes and the associated sinks and sources between the atmosphere and
the ocean. The use of coupled satellite data (e.g. SST and/or Ocean colour) that
carry turbulence information associated to ocean dynamics is taken into account at
unprecedented detail level to incorporate turbulence effects in the evaluation of the air-sea
fluxes. We will present a framework as described above for determining sources
and sinks of GHG from satellite remote sensing with the Peru OMZ as a test bed. |
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