Higher‐Resolution Tropopause Folding Accounts for More Stratospheric Ozone Intrusions
Name
Geophysical Research Letters - 2023 - Bartusek - Higher‐Resolution Tropopause Folding Accounts for More Stratospheric Ozone.pdf
Description
Published version
Size
8.02 MB
Format
Adobe PDF
Checksum (MD5)
e3f3f4a3ebb04eb491818c239dcf1b96
Author(s)
Bartusek, Samuel
Wu, Yutian
Ting, Mingfang
Zheng, Cheng
Fiore, Arlene
Sprenger, Michael
Flemming, Johannes
Date Issued
April 23, 2023
Journal
Geophysical Research Letters
Publisher
American Geophysical Union
Citation
Bartusek, S., Wu, Y., Ting, M., Zheng, C., Fiore, A., Sprenger, M., & Flemming, J. (2023). Higher-resolution tropopause folding accounts for more stratospheric ozone intrusions. Geophysical Research Letters, 50, e2022GL101690.
Version
Final published version
Abstract
Ozone in the troposphere is a pollutant and greenhouse gas, and it is crucial to better understand its transport from the ozone-rich stratosphere. Tropopause folding, wherein stratospheric air intrudes downward into the troposphere, enables stratosphere-to-troposphere ozone transport (STT). However, systematic analysis of the relationship between folding and tropospheric ozone, using data that can both capture folding's spatial scales and accurately represent tropospheric chemistry, is limited. Here, we compare folding in high-resolution reanalysis ERA5 (0.25° horizontal, <21 hPa vertical) and low-resolution chemical reanalysis CAMSRA (0.75°, <40 hPa), against CAMSRA ozone, over 1 year. Folding becomes dramatically more frequent at high resolution, with vertical resolution overwhelmingly responsible. Deeper, more filamentary folding is almost entirely unrepresented at low resolution. Higher-resolution folding is better-correlated with tropospheric ozone (especially along midlatitude storm tracks, where deep folding is most common); STT is therefore likely more attributable to tropopause folding than coarsely-resolved folding can capture.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
10.1029/2022gl101690
