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The influence of instrumental line shape degradation on NDACC gas retrievals: Total column and profile

Sun, Youwen; Palm, Mathias; Liu, Cheng; Hase, Frank; Griffith, David; Weinzierl, Christine; Petri, Christof; Wang, Wei; Notholt, Justus

Abstract:
We simulated instrumental line shape (ILS) degradations with respect to typical types of misalignment, and compared their influence on each NDACC (Network for Detection of Atmospheric Composition Change) gas. The sensitivities of the total column, the root mean square (rms) of the fitting residual, the total random uncertainty, the total systematic uncertainty, the total uncertainty, degrees of freedom for signal (DOFs), and the profile with respect to different levels of ILS degradation for all current standard NDACC gases, i.e. O3, HNO3, HCl, HF, ClONO2, CH4, CO, N2O, C2H6, and HCN, were investigated. The influence of an imperfect ILS on NDACC gases’ retrieval was assessed, and the consistency under different meteorological conditions and solar zenith angles (SZAs) were examined. The study concluded that the influence of ILS degradation can be approximated by the linear sum of individual modulation efficiency (ME) amplitude influence and phase error (PE) influence. The PE influence is of secondary importance compared with the ME amplitude. Generally, the stratospheric gases are more sensitive to ILS degradation than the tropospher ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000083646
Veröffentlicht am 22.06.2018
Originalveröffentlichung
DOI: 10.5194/amt-11-2879-2018
Scopus
Zitationen: 2
Web of Science
Zitationen: 2
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 1867-1381, 1867-8548
urn:nbn:de:swb:90-836464
KITopen-ID: 1000083646
HGF-Programm 12.03.01 (POF III, LK 01)
Erschienen in Atmospheric measurement techniques
Band 11
Heft 5
Seiten 2879-2896
Nachgewiesen in Web of Science
Scopus
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