Buchumschlag

Occurrence of polar stratospheric clouds as derived from ground-based zenith DOAS observations using the colour index

Polar stratospheric clouds (PSCs) are an important component of ozone chemistry in polar regions. Studying the ozone-depleting processes requires a precise description of PSCs on a long-term basis. Although satellite observations already yield high spatial coverage, continuous ground-based measureme...

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Hauptverfasser: Lauster, Bianca (VerfasserIn) , Dörner, Steffen (VerfasserIn) , Enell, Carl-Fredrik (VerfasserIn) , Frieß, Udo (VerfasserIn) , Gu, Myojeong (VerfasserIn) , Puķīte, Janis (VerfasserIn) , Raffalski, Uwe (VerfasserIn) , Wagner, Thomas (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 19 December 2022
In: Atmospheric chemistry and physics
Year: 2022, Jahrgang: 22, Heft: 24, Pages: 15925-15942
ISSN:1680-7324
DOI:10.5194/acp-22-15925-2022
Online-Zugang:Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.5194/acp-22-15925-2022
Verlag, lizenzpflichtig, Volltext: https://acp.copernicus.org/articles/22/15925/2022/
Volltext
Verfasserangaben:Bianca Lauster, Steffen Dörner, Carl-Fredrik Enell, Udo Frieß, Myojeong Gu, Janis Puķīte, Uwe Raffalski, and Thomas Wagner
Beschreibung
Zusammenfassung:Polar stratospheric clouds (PSCs) are an important component of ozone chemistry in polar regions. Studying the ozone-depleting processes requires a precise description of PSCs on a long-term basis. Although satellite observations already yield high spatial coverage, continuous ground-based measurements covering long time periods can be a valuable complement. In this study, differential optical absorption spectroscopy (DOAS) instruments are used to investigate the occurrence of PSCs based on the so-called colour index (CI), i.e. the colour of the zenith sky. Defined as the ratio between the observed intensities of scattered sunlight at two wavelengths, it provides a method to detect PSCs during twilight even in the presence of tropospheric clouds. We present data from instruments at the German research station Neumayer, Antarctica (71∘ S, 8∘ W), as well as Kiruna, Sweden (68∘ N, 20∘ E), which have been in operation for more than 20 years.
Beschreibung:Gesehen am 28.02.2023
Beschreibung:Online Resource
ISSN:1680-7324
DOI:10.5194/acp-22-15925-2022

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