Different Relationships between Arctic Oscillation and Ozone in the Stratosphere over the Arctic in January and February

We compare the relationship between the Arctic Oscillation (AO) and ozone concentration in the lower stratosphere over the Arctic during 1980–1994 (P1) and 2007–2019 (P2) in January and February using reanalysis datasets. The out-of-phase relationship between the AO and ozone in the lower stratosphe...

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Bibliographic Details
Published in:Atmosphere 2021-01, Vol.12 (2), p.129
Main Authors: Liu, Meichen, Hu, Dingzhu
Format: Article
Language:English
Subjects:
Anomalies
Arctic Oscillation
Brewer–Dobson circulation
Brunt-vaisala frequency
buoyancy frequency
Climate change
Datasets
Lower stratosphere
Ozone
Ozone anomalies
Ozone concentration
ozone in the stratosphere
planetary wave
Planetary wave propagation
Planetary waves
polar vortex
Stratosphere
Trends
Troposphere
Vortices
Wave propagation
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Summary:We compare the relationship between the Arctic Oscillation (AO) and ozone concentration in the lower stratosphere over the Arctic during 1980–1994 (P1) and 2007–2019 (P2) in January and February using reanalysis datasets. The out-of-phase relationship between the AO and ozone in the lower stratosphere is significant in January during P1 and February during P2, but it is insignificant in January during P2 and February during P1. The variable links between the AO and ozone in the lower stratosphere over the Arctic in January and February are not caused by changes in the spatial pattern of AO but are related to the anomalies in the planetary wave propagation between the troposphere and stratosphere. The upward propagation of the planetary wave in the stratosphere related to the positive phase of AO significantly weakens in January during P1 and in February during P2, which may be related to negative buoyancy frequency anomalies over the Arctic. When the AO is in the positive phase, the anomalies of planetary wave further contribute to the negative ozone anomalies via weakening the Brewer–Dobson circulation and decreasing the temperature in the lower stratosphere over the Arctic in January during P1 and in February during P2.
ISSN:2073-4433
2073-4433
DOI:10.3390/atmos12020129