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| Titel |
Airborne in situ vertical profiling of HDO / H216O in the subtropical troposphere during the MUSICA remote sensing validation campaign |
| VerfasserIn |
C. Dyroff, S. Sanati, E. Christner, A. Zahn, M. Balzer, H. Bouquet, J. B. McManus, Y. González-Ramos, M. Schneider |
| 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. 5 ; Nr. 8, no. 5 (2015-05-09), S.2037-2049 |
| Datensatznummer |
250116359
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| Publikation (Nr.) |
 copernicus.org/amt-8-2037-2015.pdf |
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| Zusammenfassung |
| Vertical profiles of water vapor (H2O) and its isotope ratio D / H expressed
as δD(H2O) were measured in situ by the ISOWAT II
diode-laser spectrometer during the MUlti-platform remote Sensing of
Isotopologues for investigating the Cycle of Atmospheric water (MUSICA)
airborne campaign. We present recent modifications of the instrument design.
The instrument calibration on the ground as well as in flight is described.
Based on the calibration measurements, the humidity-dependent uncertainty of
our airborne data is determined. For the majority of the airborne data we
achieved an accuracy (uncertainty of the mean) of
Δ(δD) ≈10‰. Vertical profiles between 150
and ~7000 m were obtained during 7 days in July and August 2013 over
the subtropical North Atlantic Ocean near Tenerife. The flights were
coordinated with ground-based (Network for the Detection of Atmospheric
Composition Change, NDACC) and space-based (Infrared Atmospheric Sounding
Interferometer, IASI) FTIR remote sensing measurements of
δD(H2O) as a means to validate the remote sensing humidity
and δD(H2O) data products. The results of the validation are
presented in detail in a separate paper (Schneider et al., 2014). The profiles
were obtained with a high vertical resolution of around 3 m. By analyzing
humidity and δD(H2O) correlations we were able to identify
different layers of air masses with specific isotopic signatures. The results
are discussed. |
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