NOTES AND CORRESPONDENCE A Mechanism of Tropical Precipitation Change due to CO 2 Increase

摘要: A recent GCM study indicates that a weakening of tropical circulation associated with slight increase in precipitation may occur when atmospheric CO2 is increased. To further understand the mechanism temperature and changes greenhouse gas increase, numerical experiment was conducted using an general model to investigate separate effects sea surface (SST) increase. It has been shown effect CO 2 reduction radiative cooling lower troposphere, leading precipitation. When concentration doubled (quadrupled) without changing SST, reduced by about 3% (6%) model. The result overlap 15-mm water vapor absorption bands. On other hand, SST vapor, increases uniformly raised 28C concentration, increased 6%.