WACCM: The High-Top Model - CESM - UCAR

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Antarctic sea-ice extent CCSM4 (CAM4) -- Pre-Industrial — 1979-2005 WACCM4 -- Pre-Industrial — 1979-2005 Observed 1979-2005 ave -- ice-ocean hindcast — Satellite CCSM4 (CAM) dashed lines: (1960-1979 ave) - PI solid lines: (1979-2005 ave) - PI WACCM4 The more realistic ozone loss in WACCM drives changes in winds that enhance sea-ice loss, producing sea-ice extent closer to modern observations.
Acceleration of the Brewer–Dobson Circulation due to Increases in Greenhouse Gases L OF THE ATMOSPHERIC SCIENCES VOLUME Garcia and Randel, J. Atmos. Sci., vol. 65 (8), pp. 2731-2739, 2008. 65 and lower stratopper stratosphere sphere to enhanced and therere were made at 5° longitude. The idation activity of Role subtropics in Climate scribed in detail (specifically for • faster circulation in greenhouse world due propagation of wave activity into the lower stratosphere and its dissipation in the • changes in meridional temperature gradient affect zonal winds, which change the regions where waves dissipate, increasing momentum deposition of three ensemble rst, or reference ive” simulation of with sea surface HG and halogen The second simu- 20th Century Age of Air (y), ~10 hPa, tropics Future, increasing GHGs Future, fixed GHGs
Page 1 and 2: WACCM: The High-Top Model WACCM top
Page 3 and 4: WACCM Motivation Roble, Geophysical
Page 5 and 6: 50N EQ 50S Stratospheric Sulfate Su
Page 7 and 8: Volcanic heating in WACCM 2°N Surf
Page 9 and 10: Grading of Chemistry in CCMs: Chapt
Page 11: WACCM Ozone Trend: CCMVal and WMO A
Page 15 and 16: Altitude (km) Impact of geoengineer
Page 17 and 18: Nuclear winter in WACCM4 Black Carb

WACCM: The High-Top Model - CESM - UCAR

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