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| Titel |
Water vapor measurements in- and outside cirrus with the novel water vapor mass spectrometer AIMS-H2O |
| VerfasserIn |
Stefan Kaufmann, Romy Schlage, Christiane Voigt, Tina Jurkat, Martina Krämer, Christian Rolf, Martin Zöger, Andreas Schäfler, Andreas Dörnbrack |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250109318
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| Publikation (Nr.) |
 EGU/EGU2015-9220.pdf |
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| Zusammenfassung |
| Water vapor plays a crucial role for the earth’s climate both directly via its radiative
properties and indirectly due to its ability to form clouds. However, accurate measurements of
especially low water vapor concentrations prevalent in the upper troposphere and lower
stratosphere are difficult and exhibit large discrepancies between different instruments and
methods. In order to address this issue and to provide a comprehensive water vapor data set
necessary to gather a complete picture of cloud formation processes, four state-of-the-art
hygrometers including the novel water vapor mass spectrometer AIMS-H2O were deployed
on the DLR research aircraft HALO during the ML-Cirrus campaign in March/April 2014
over Europe. Here, we present first water vapor measurements of AIMS-H2O on HALO. The
instrument performance is validated by intercomparison with the fluorescence hygrometer
FISH and the laser hygrometer SHARC, both also mounted in the aircraft. This
intercomparison shows good agreement between the instruments from low stratospheric
mixing ratios up to higher H2O concentrations at upper tropospheric conditions.
Gathering data from over 24 flight hours, no significant offsets between the instruments
were found (mean of relative deviation |
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