retrieval and validation of carbon dioxide, methane and water vapor for the canary islands ir-laser occultation experiment
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ID: 175371
2015
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Abstract
The first ground-based experiment to prove the concept of a novel
space-based observation technique for microwave and infrared-laser
occultation between low-Earth-orbit satellites was performed in the
Canary Islands between La Palma and Tenerife. For two nights from
21 to 22 July 2011 the experiment delivered the infrared-laser differential transmission principle for the
measurement of greenhouse gases (GHGs) in the free atmosphere. Such
global and long-term stable measurements of GHGs, accompanied also by
measurements of thermodynamic parameters and line-of-sight wind in
a self-calibrating way, have become very important for climate change
monitoring. The experiment delivered promising initial data for
demonstrating the new observation concept by retrieving volume mixing
ratios of GHGs along a ~144 km signal path at altitudes of ~2.4 km.
Here, we present a detailed analysis of the measurements,
following a recent publication that introduced the experiment's technical
setup and first results for an example retrieval of CO2. We
present the observational and validation data sets, the latter
simultaneously measured at the transmitter and receiver sites; the
measurement data handling; and the differential transmission retrieval
procedure. We also determine the individual and combined uncertainties
influencing the results and present the retrieval results for
12CO2, 13CO2, C18OO, H2O and
CH4. The new method is found to have a reliable basis for
monitoring of greenhouse gases such as CO2, CH4, and
H2O in the free atmosphere.
| Reference Key |
proschek2015atmosphericretrieval
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|---|---|
| Authors | ;V. Proschek;G. Kirchengast;S. Schweitzer;J. S. A. Brooke;P. F. Bernath;C. B. Thomas;J.-G. Wang;K. A. Tereszchuk;G. González Abad;R. J. Hargreaves;C. A. Beale;J. J. Harrison;P. A. Martin;V. L. Kasyutich;C. Gerbig;O. Kolle;A. Loescher |
| Journal | bioorganic & medicinal chemistry |
| Year | 2015 |
| DOI |
10.5194/amt-8-3315-2015
|
| URL | |
| Keywords |
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