Is the residual vertical velocity a good proxy for stratosphere-troposphere exchange of ozone?
Abstract
Abstract Stratosphere‐troposphere exchange (STE) of ozone (O 3 ) is key in the budget of tropospheric O 3 , in turn affecting climate forcing and global air quality. We compare three commonly used diagnostics meant to quantify cross‐tropopause O 3 fluxes with a Chemistry‐Transport Model driven by two distinct European Centre forecast fields. 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 O 3 . Climatic variability in the modeled O 3 flux needs to be diagnosed directly rather than indirectly through the overturning circulation.
- Authors:
-
- Univ. of California, Irvine, CA (United States). Department of Earth System Science
- Publication Date:
- Research Org.:
- Univ. of California, Irvine, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1454735
- Alternate Identifier(s):
- OSTI ID: 1402283
- Grant/Contract Number:
- SC0007021
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Geophysical Research Letters
- Additional Journal Information:
- Journal Volume: 41; Journal Issue: 24; Journal ID: ISSN 0094-8276
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; 54 ENVIRONMENTAL SCIENCES; Brewer-Dobson circulation; stratosphere-troposphere exchange of ozone; transformed Eulerian mean; cross-tropopause ozone flux; ozone flux diagnostic; climate change
Citation Formats
Hsu, Juno, and Prather, Michael J. Is the residual vertical velocity a good proxy for stratosphere-troposphere exchange of ozone?. United States: N. p., 2014.
Web. doi:10.1002/2014GL061994.
Hsu, Juno, & Prather, Michael J. Is the residual vertical velocity a good proxy for stratosphere-troposphere exchange of ozone?. United States. https://doi.org/10.1002/2014GL061994
Hsu, Juno, and Prather, Michael J. Sat .
"Is the residual vertical velocity a good proxy for stratosphere-troposphere exchange of ozone?". United States. https://doi.org/10.1002/2014GL061994. https://www.osti.gov/servlets/purl/1454735.
@article{osti_1454735,
title = {Is the residual vertical velocity a good proxy for stratosphere-troposphere exchange of ozone?},
author = {Hsu, Juno and Prather, Michael J.},
abstractNote = {Abstract Stratosphere‐troposphere exchange (STE) of ozone (O 3 ) is key in the budget of tropospheric O 3 , in turn affecting climate forcing and global air quality. We compare three commonly used diagnostics meant to quantify cross‐tropopause O 3 fluxes with a Chemistry‐Transport Model driven by two distinct European Centre forecast fields. 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 O 3 . Climatic variability in the modeled O 3 flux needs to be diagnosed directly rather than indirectly through the overturning circulation.},
doi = {10.1002/2014GL061994},
journal = {Geophysical Research Letters},
number = 24,
volume = 41,
place = {United States},
year = {Sat Dec 20 00:00:00 EST 2014},
month = {Sat Dec 20 00:00:00 EST 2014}
}
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Works referencing / citing this record:
Mechanisms Governing Interannual Variability of Stratosphere-to-Troposphere Ozone Transport: MECHANISMS OF OZONE TRANSPORT
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