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| Titel |
MIPAS-STR measurements in the Arctic UTLS in winter/spring 2010: instrument characterization, retrieval and validation |
| VerfasserIn |
W. Woiwode, H. Oelhaf, T. Gulde, C. Piesch, G. Maucher, A. Ebersoldt, C. Keim, M. Höpfner, S. Khaykin, F. Ravegnani, A. E. Ulanovsky, C. M. Volk, E. Hösen, A. Dörnbrack, J. Ungermann, C. Kalicinsky, J. Orphal |
| 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 ; 5, no. 6 ; Nr. 5, no. 6 (2012-06-01), S.1205-1228 |
| Datensatznummer |
250002961
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| Publikation (Nr.) |
 copernicus.org/amt-5-1205-2012.pdf |
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| Zusammenfassung |
| The mid-infrared FTIR-limb-sounder Michelson Interferometer for Passive
Atmospheric Sounding–STRatospheric aircraft (MIPAS-STR) was deployed
onboard the research aircraft M55 Geophysica during the RECONCILE
campaign (Reconciliation of Essential Process Parameters for an Enhanced Predictability of Arctic Stratospheric Ozone Loss
and its Climate Interactions) in the Arctic winter/spring 2010. From the MIPAS-STR measurements,
vertical profiles and 2-dimensional vertical cross-sections of temperature
and trace gases are retrieved. Detailed mesoscale structures of polar vortex
air, extra vortex air and vortex filaments are identified in the results at
typical vertical resolutions of 1 to 2 km and typical horizontal sampling
densities of 45 or 25 km, depending on the sampling programme. Results are
shown for the RECONCILE flight 11 on 2 March 2010 and are validated with
collocated in-situ measurements of temperature, O3, CFC-11, CFC-12 and
H2O. Exceptional agreement is found for the in-situ comparisons of
temperature and O3, with mean differences (vertical profile/along
flight track) of 0.2/−0.2 K for temperature and −0.01/0.05 ppmv for O3
and corresponding sample standard deviations of the mean differences of
0.7/0.6 K and 0.1/0.3 ppmv. The comparison of the retrieved vertical
cross-sections of HNO3 from MIPAS-STR and the infrared limb-sounder
Cryogenic Infrared Spectrometers and Telescopes for the Atmosphere–New
Frontiers (CRISTA–NF) indicates a high degree of agreement. We discuss
MIPAS-STR in its current configuration, the spectral and radiometric
calibration of the measurements and the retrieval of atmospheric parameters
from the spectra. The MIPAS-STR measurements are significantly affected by
continuum-like contributions, which are attributed to background aerosol and
broad spectral signatures from interfering trace gases, and are important for
mid-infrared limb-sounding in the Upper Troposphere/Lower
Stratosphere (UTLS) region. Taking into consideration continuum-like effects, we
present a scheme suitable for accurate retrievals of temperature and an
extended set of trace gases, including the correction of a systematic
line-of-sight offset. |
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