Marsh, DR orcid.org/0000-0001-6699-494X, Lamarque, J-F, Conley, AJ et al. (1 more author) (2016) Stratospheric ozone chemistry feedbacks are not critical for the determination of climate sensitivity in CESM1(WACCM). Geophysical Research Letters, 43 (8). pp. 3928-3934. ISSN 0094-8276
Abstract
The Community Earth System Model‐Whole Atmosphere Community Climate Model (CESM1‐WACCM) is used to assess the importance of including chemistry feedbacks in determining the equilibrium climate sensitivity (ECS). Two 4×CO2 model experiments were conducted: one with interactive chemistry and one with chemical constituents other than CO2 held fixed at their preindustrial values. The ECS determined from these two experiments agrees to within 0.01 K. Similarly, the net feedback parameter agrees to within 0.01 W m−2 K−1. This agreement occurs in spite of large changes in stratospheric ozone found in the simulation with interactive chemistry: a 30% decrease in the tropical lower stratosphere and a 40% increase in the upper stratosphere, broadly consistent with other published estimates. Off‐line radiative transfer calculations show that ozone changes alone account for the difference in radiative forcing. We conclude that at least for determining global climate sensitivity metrics, the exclusion of chemistry feedbacks is not a critical source of error in CESM.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2016. American Geophysical Union. All Rights Reserved. Uploaded in accordance with the publisher's self-archiving policy. To view the published open abstract, go to https://doi.org/10.1002/2016GL068344. |
Keywords: | climate sensitivity; ozone; feedbacks; CESM; 4XCO₂; WACCM |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Astrophysics (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 04 Jun 2018 09:47 |
Last Modified: | 25 Jun 2023 21:22 |
Status: | Published |
Publisher: | American Geophysical Union |
Identification Number: | 10.1002/2016GL068344 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:131567 |