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Is the residual vertical velocity a good proxy for stratosphere-troposphere exchange of ozone?

Journal Article · · Geophysical Research Letters
DOI:https://doi.org/10.1002/2014GL061994· OSTI ID:1454735
 [1];  [2]
  1. Univ. of California, Irvine, CA (United States). Department of Earth System Science; University of California Irvine
  2. Univ. of California, Irvine, CA (United States). Department of Earth System Science
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Stratosphere-troposphere exchange (STE) of ozone (O3) is key in the budget of tropospheric O3, in turn affecting climate forcing and global air quality. We compare three commonly used diagnostics meant to quantify cross-tropopause O3 fluxes with a Chemistry-Transport Model driven by two distinct European Centre forecast fields. Here, our reference case calculates accurate, geographically resolved net transport across an isosurface in artificial tracer e90 representing the tropopause. Hemispheric fluxes derived from the ozone mass budget of the lowermost stratosphere yield similar results. Use of the Brewer-Dobson residual vertical velocity as a scaled proxy for ozone flux, however, fails to capture the interannual variability. Thus, the common notion that the strength of stratospheric overturning circulation is a good measure for global STE does not apply to O3. Finally, climatic variability in the modeled O3 flux needs to be diagnosed directly rather than indirectly through the overturning circulation.
Research Organization:
Univ. of California, Irvine, CA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Grant/Contract Number:
SC0007021
OSTI ID:
1454735
Alternate ID(s):
OSTI ID: 1402283
Journal Information:
Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 24 Vol. 41; ISSN 0094-8276
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (9)

Mechanisms Governing Interannual Variability of Stratosphere-to-Troposphere Ozone Transport: MECHANISMS OF OZONE TRANSPORT journal January 2018
The Vertical Momentum Budget of Shallow Cumulus Convection: Insights From a Lagrangian Perspective journal January 2019
Why does surface ozone peak before a typhoon landing in southeast China? journal January 2015
Drivers of changes in stratospheric and tropospheric ozone between year 2000 and 2100 journal January 2016
Why does surface ozone peak before a typhoon landing in southeast China? posted_content September 2015
Drivers of changes in stratospheric and tropospheric ozone between year 2000 and 2100 posted_content November 2015
Age of air as a diagnostic for transport timescales in global models journal January 2018
Photolysis rates in correlated overlapping cloud fields: Cloud-J 7.3c journal January 2015
Drivers of changes in stratospheric and tropospheric ozone between year 2000 and 2100 text January 2016

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Related Subjects

54 ENVIRONMENTAL SCIENCES
58 GEOSCIENCES
Brewer-Dobson circulation
climate change
cross-tropopause ozone flux
ozone flux diagnostic
stratosphere-troposphere exchange of ozone
transformed Eulerian mean