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| Titel |
Impacts of atmospheric state uncertainty on O2 measurement requirements for the ASCENDS mission |
| VerfasserIn |
S. Crowell, P. Rayner, S. Zaccheo, B. Moore |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 8, no. 7 ; Nr. 8, no. 7 (2015-07-03), S.2685-2697 |
| Datensatznummer |
250116473
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| Publikation (Nr.) |
 copernicus.org/amt-8-2685-2015.pdf |
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| Zusammenfassung |
| Remotely sensed observations of atmospheric composition require an estimate
of surface pressure. This estimate can either come from an instrument with
sensitivity in an O2 absorption feature in the spectrum, or it can be
provided by a numerical weather prediction (NWP) model. In this work, the
authors outline an information-based methodology for setting measurement
requirements for an active lidar measurement of O2 in the context of the
Active Sensing of Carbon Emissions over Nights, Days and Seasons (ASCENDS)
mission. The results indicate that the impacts of correlations in the
environmentally induced vertical weighting function errors between CO2
and O2 measurements are nontrivial and that the choice of CO2 and
O2 wavelengths can lead to a stricter or looser requirement than that of
surface pressure considerations alone, which would indicate about a 0.1 %
precision for 1mb accuracy. Furthermore, the less sensitive the CO2
measurement is to surface pressure errors, the more difficult it will be for
an O2 observation to provide a useful measurement. |
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