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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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Bibliographic Details
Main Authors: Lauster, Bianca (Author) , Dörner, Steffen (Author) , Enell, Carl-Fredrik (Author) , Frieß, Udo (Author) , Gu, Myojeong (Author) , Puķīte, Janis (Author) , Raffalski, Uwe (Author) , Wagner, Thomas (Author)
Format: Article (Journal)
Language:English
Published: 19 December 2022
In: Atmospheric chemistry and physics
Year: 2022, Volume: 22, Issue: 24, Pages: 15925-15942
ISSN:1680-7324
DOI:10.5194/acp-22-15925-2022
Online Access:Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.5194/acp-22-15925-2022
Verlag, lizenzpflichtig, Volltext: https://acp.copernicus.org/articles/22/15925/2022/
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Author Notes:Bianca Lauster, Steffen Dörner, Carl-Fredrik Enell, Udo Frieß, Myojeong Gu, Janis Puķīte, Uwe Raffalski, and Thomas Wagner
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Summary: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.
Item Description:Gesehen am 28.02.2023
Physical Description:Online Resource
ISSN:1680-7324
DOI:10.5194/acp-22-15925-2022

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