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| Titel |
Observation of tropospheric δD by IASI over western Siberia: comparison with a general circulation model |
| VerfasserIn |
M. Pommier, J.-L. Lacour, C. Risi, F. M. Bréon, C. Clerbaux, P.-F. Coheur, K. Gribanov, D. Hurtmans, J. Jouzel, V. Zakharov |
| 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 ; 7, no. 6 ; Nr. 7, no. 6 (2014-06-04), S.1581-1595 |
| Datensatznummer |
250115809
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| Publikation (Nr.) |
 copernicus.org/amt-7-1581-2014.pdf |
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| Zusammenfassung |
| This study presents the joint H216O and HDO retrieval from
Infrared Atmospheric Sounding Interferometer (IASI) spectra over western
Siberia. IASI is an instrument on board the MetOp-A European satellite. The
global coverage of the instrument and the good signal-to-noise ratio allow
us to provide information on δD over this remote region. We show
that IASI measurements may be used to estimate integrated δD between
the surface and 3 km altitude or from 1 to 5 km depending on the thermal
contrast, with observational errors lower than 4% and 7%,
respectively. The retrieved data are compared to simulations from an
isotopic general circulation model, LMDZ-iso for 2011. The satellite measurements and the model
agree well and they reproduce well the seasonal and day-to-day variations
for δD, presenting a good correlation (r up to 0.8 with the smoothed
data in summer). The IASI-based retrievals also show the seasonal variation
of the specific humidity in both altitude ranges. |
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