The Brewer‐Dobson Circulation During the Last Glacial Maximum
Name
2019GL086271.pdf
Description
Published version
Size
1.84 MB
Format
Adobe PDF
Checksum (MD5)
6b46a1b9c24f1e6432120a298a9280e2
Author(s)
Fu, Qiang
White, Rachel H.
Wang, Mingcheng
Alexander, Becky
Solomon, Susan
Gettelman, Andrew
Battisti, David S.
Lin, Pu
Date Issued
February 2020
Journal
Geophysical Research Letters
Publisher
American Geophysical Union (AGU)
Citation
Fu, Qiang et al. "The Brewer‐Dobson Circulation During the Last Glacial Maximum." Geophysical Research Letters 47, 5 (February 2020): e2019GL086271 © 2020 The Authors
Version
Final published version
Abstract
The Brewer-Dobson circulation during the Last Glacial Maximum (LGM) is investigated in simulations using the Whole Atmosphere Community Climate Model version 6. We examine vertical mass fluxes, age of stratospheric air, and the transformed Eulerian mean stream function and find that the modeled annual-mean Brewer-Dobson circulation during the LGM is almost everywhere slower than that in the modern climate (with or without anthropogenic ozone depleting substances). Compared to the modern climate, the annual-mean tropical upwelling in the LGM is 11.3–16.9%, 11.2–15.8%, and 4.4–10.2% weaker, respectively, at 100, 70, and 30 hPa. Simulated decreases in annual-mean mass fluxes at 70 and 100 hPa are caused by a weaker parameterized orographic gravity wave drag and resolved wave drag, respectively.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Massachusetts Institute of Technology. Department of Chemistry
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1029/2019gl086271
