Journal Article

FZJ-2021-01731

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Polar Stratospheric Clouds: Satellite Observations, Processes, and Role in Ozone Depletion

Tritscher, I. (Corresponding author)FZJ* ; Pitts, M. C. (Corresponding author) ; Poole, L. R. ; Alexander, S. P. ; Cairo, F. ; Chipperfield, M. P. ; Grooß, J.-U.FZJ* ; Höpfner, M. ; Lambert, A. ; Luo, B. P. ; Molleker, S. ; Orr, A. ; Salawitch, R. ; Snels, M. ; Spang, R.FZJ* ; Woiwode, W. ; Peter, T.

2021
Wiley Hoboken, NJ

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Please use a persistent id in citations: http://hdl.handle.net/2128/27937  doi:10.1029/2020RG000702

Abstract: Polar stratospheric clouds (PSCs) play important roles in stratospheric ozone depletion during winter and spring at high latitudes (e.g., the Antarctic ozone hole). PSC particles provide sites for heterogeneous reactions that convert stable chlorine reservoir species to radicals that destroy ozone catalytically. PSCs also prolong ozone depletion by delaying chlorine deactivation through the removal of gas-phase HNO3 and H2O by sedimentation of large nitric acid trihydrate (NAT) and ice particles. Contemporary observations by the spaceborne instruments Michelson Interferometer for Passive Atmospheric Sounding (MIPAS), Microwave Limb Sounder (MLS), and Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) have provided an unprecedented polar vortex-wide climatological view of PSC occurrence and composition in both hemispheres. These data have spurred advances in our understanding of PSC formation and related dynamical processes, especially the firm evidence of widespread heterogeneous nucleation of both NAT and ice PSC particles, perhaps on nuclei of meteoritic origin. Heterogeneous chlorine activation appears to be well understood. Reaction coefficients on/in liquid droplets have been measured accurately, and while uncertainties remain for reactions on solid NAT and ice particles, they are considered relatively unimportant since under most conditions chlorine activation occurs on/in liquid droplets. There have been notable advances in the ability of chemical transport and chemistry-climate models to reproduce PSC temporal/spatial distributions and composition observed from space. Continued spaceborne PSC observations will facilitate further improvements in the representation of PSC processes in global models and enable more accurate projections of the evolution of polar ozone and the global ozone layer as climate changes.

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Contributing Institute(s):

1. Stratosphäre (IEK-7)

Research Program(s):

1. 211 - Die Atmosphäre im globalen Wandel (POF4-211) (POF4-211)
2. DFG project 310479827 - Stratosphärische Wasserdampf Simulationen: Von den Polarregionen zur Tropischen Tropopause (310479827)

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 20 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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