Tropical stratospheric circulation and ozone coupled to Pacific multi-decadal variability

Iglesias‐Suarez, Fernando; Wild, Oliver; Kinnison, Douglas E.; Garcia, Rolando R.; Marsh, Daniel R.; Lamarque, Jean‐François; Ryan, Edmund M.; Davis, Sean M.; Eichinger, Roland; Saiz‐Lopez, Alfonso; Young, Paul J.

doi:10.1029/2020GL092162

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Tropical stratospheric circulation and ozone coupled to Pacific multi-decadal variability

2021
By Iglesias‐Suarez, Fernando ; Wild, Oliver ; Kinnison, Douglas E. ; ...
Source: Geophysical Research Letters, 48, e2020GL092162

[PDF-1.43 MB]

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Journal Title:

Geophysical Research Letters
Personal Author:

Iglesias‐Suarez, Fernando ; Wild, Oliver ; Kinnison, Douglas E. ; Garcia, Rolando R. ; Marsh, Daniel R. ; ... More +

Iglesias‐Suarez, Fernando ; Wild, Oliver ; Kinnison, Douglas E. ; Garcia, Rolando R. ; Marsh, Daniel R. ; Lamarque, Jean‐François ; Ryan, Edmund M. ; Davis, Sean M. ; Eichinger, Roland ; Saiz‐Lopez, Alfonso ; Young, Paul J. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CSL (Chemical Sciences Laboratory)

OAR (Oceanic and Atmospheric Research) ; CSL (Chemical Sciences Laboratory) Less -
Description:

Observational and modeling evidence suggest a recent acceleration of the stratospheric Brewer-Dobson circulation (BDC), driven by climate change and stratospheric ozone depletion. However, slowly varying natural variability can compromise our ability to detect such forced changes over the relatively short observational record. Using observations and chemistry-climate model simulations, we demonstrate a link between multi-decadal variability in the strength of the BDC and the Interdecadal Pacific Oscillation (IPO), with knock-on impacts for composition in the stratosphere. After accounting for the IPO-like variability in the BDC, the modeled trend is approximately 7%–10% dec−1 over 1979–2010. Furthermore, we find that sea surface temperatures explain up to 50% of the simulated decadal variability in tropical mid-stratospheric ozone. Our findings demonstrate strong links between low-frequency variability in the oceans, troposphere and stratosphere, as well as their potential importance in detecting structural changes in the BDC and future ozone recovery.
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Climatic Changes Stratosphere Troposphere
Source:

Geophysical Research Letters, 48, e2020GL092162
DOI:

https://doi.org/10.1029/2020GL092162
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Journal Article
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CC BY
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Submitted
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urn:sha256:c840dc6f8653566ed365080c4c9f7cdd54c137df0c33863711f8ef6b5cb500e9
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Tropical stratospheric circulation and ozone coupled to Pacific multi-decadal variability

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