Premium
Sensitivity of equilibrium surface temperature of CCM3 to systematic changes in atmospheric CO 2
Author(s) -
Kothavala Zavareh,
Oglesby Robert J.,
Saltzman Barry
Publication year - 1999
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/1998gl900275
Subject(s) - sensitivity (control systems) , environmental science , gcm transcription factors , atmospheric sciences , atmospheric model , climate sensitivity , climate model , meteorology , materials science , climate change , physics , general circulation model , geology , oceanography , electronic engineering , engineering
We have redone our computations of the equilibrium response of surface temperature to atmospheric CO 2 concentrations using the latest version of the NCAR Community Climate Model (version 3 rather than version 1). Eight GCM simulations with CO 2 concentrations varying from 180 to 3000 ppmv were conducted with CCM3 compared to six CO 2 concentrations with CCM1. A preliminary examination of the CCM3 simulations showed the same basic non‐linear behaviour of temperature to CO 2 concentrations obtained previously with CCM1. The magnitude of the sensitivities, however, were much lower in the new CCM3 runs than in the older CCM1 runs. Four possible reasons for the reduced sensitivity in CCM3 are discussed.