【摘要】 利用GFDL-CM2.1耦合模式控制试验和CO2增长试验逐日降水输出结果,评估了CO2浓度加倍对我国极端降水变化的影响。结果表明:CO2浓度加倍导致我国东部地区年极端降水的强度增强、降水量显著增多及降水频次显著增加(除华北南部外);CO2浓度加倍对我国春夏季极端降水影响较大,导致东部多数地区春夏季极端降水频次增加,强度增强;而CO2浓度加倍导致华北南部和长江中下游春夏季雨日减少以及小雨、中雨减少,从而导致年总降水量减少。更多还原

【Abstract】 Outputs of control experiment and CO2 increasing experiment from GFDL-CM2.1 coupled model were used to evaluate the effect of CO2 doubling on the changes in extreme precipitation in China.The results show that CO2 doubling would cause a prominent increase of annual extreme precipitation amount and precipitation intensity in eastern China,and a prominent increase of annual extreme precipitation frequency except in the south part of North China.Furthermore,CO2 doubling would bring about severe influence on the distribution of extreme precipitation in spring and summer,leading to the increases of extreme precipitation amount and precipitation intensity,and extreme precipitation frequency in the most parts of eastern China.However,the annual precipitation in the south part of North China and in the mid-lower reaches of the Yangtze River both decreased,due to the decrease of wet days in spring and summer as well as the decreases of light rain and moderate rain.更多还原