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| Titel |
An automated ground based FTIR system for validation of satellite total column measurements of CO2 and CH4 |
| VerfasserIn |
M. C. Geibel, D. G. Feist, M. Heimann |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250027471
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| Zusammenfassung |
| Upcoming satellites (such as OCO and GOSAT) measure total column CO2. These
measurements have to be validated. Existing ground-based networks usually only measure
within the boundary layer. Airborne measurements are are not able to detect stratospheric part
of CO2 and they are too expensive to provide the only validation data. Therefor those
methods are not ideal for satellite validation.
Ground-based FTIR instruments however are unique because they can provide measurements
of total column atmospheric CO2 and CH4 with the necessary accuracy. Unfortunately such
measurements are very sparse, especially in the tropical regions.
The Atmospheric Remote Sensing group (ARS) of the Max Planck Institute for
Biogeochemistry in Jena, Germany, is currently making the final preparations for installing
such an FTIR instrument. The instrument will be part of the Total Carbon Column
Observation Network (TCCON) that will provide ground-truth data for satellite
validation.
As a fully automated measurement system it will be installed in the tropics, presumably on
Ascension Island. This instrument will be able to observe the temporal variation of CO2 and
CH4 and the results will be interpreted with the help of global source and sink models as well
as local flask sample measurements. Additional validation with aircraft measurements
and a ship borne FTIR are planned. The system will provide an ideal validation
site for future satellite measurements of CO2 and CH4 in the very active tropical
region. |
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