Climate Change from 1850 to 2005 Simulated in CESM1(WACCM) ...

• Main Authors: Marsh, Daniel R., Mills, Michael J., Kinnison, Douglas E., Lamarque, Jean-Francois, Calvo, Natalia, Polvani, Lorenzo M.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Columbia University 2013
• Subjects: Atmosphere; Meteorology; Climatic changes; Sea ice
• Online Access: https://dx.doi.org/10.7916/d8df6wzt; https://academiccommons.columbia.edu/doi/10.7916/D8DF6WZT

The NCAR Community Earth System Model (CESM) now includes an atmospheric component that extends in altitude to the lower thermosphere. This atmospheric model, known as the Whole Atmosphere Community Climate Model (WACCM), includes fully interactive chemistry, allowing, for example, a self-consistent representation of the development and recovery of the stratospheric ozone hole and its effect on the troposphere. This paper focuses on analysis of an ensemble of transient simulations using CESM1(WACCM), covering the period from the preindustrial era to present day, conducted as part of phase 5 of the Coupled Model Intercomparison Project. Variability in the stratosphere, such as that associated with stratospheric sudden warmings and the development of the ozone hole, is in good agreement with observations. The signals of these phenomena propagate into the troposphere, influencing near-surface winds, precipitation rates, and the extent of sea ice. In comparison of tropospheric climate change predictions with ...