中文摘要：

从 ARIS 的一个大气的一般发行量模型 BCC_AGCM2.0 和观察数据被用来计算有效放射的强迫(小块土地) 由于增加的甲烷集中气候上的后来工业化前的时间和它的影响。小块土地从 1750 ～ 2011 的甲烷是由作为混合得好的温室气体拿它的 0.46 W m ² ，并且甲烷的不同类增加了它的小块土地由大约 0.02 W m ² 。甲烷集中的变化后来工业化前导致了 0.31 的增加 ??????  ??????????????? ？？

英文摘要：

An atmospheric general circulation model BCC_AGCM2.0 and observation data from ARIS were used to calculate the effective radiative forcing（ERF） due to increased methane concentration since pre-industrial times and its impacts on climate. The ERF of methane from 1750 to2011 was 0.46 W m^-2 by taking it as a well-mixed greenhouse gas, and the inhomogeneity of methane increased its ERF by about 0.02 W m^-2.The change of methane concentration since pre-industrial led to an increase of 0.31 ℃ in global mean surface air temperature and 0.02 mm d 1in global mean precipitation. The warming was prominent over the middle and high latitudes of the Northern Hemisphere（with a maximum increase exceeding 1.4℃）. The precipitation notably increased（maximum increase of 1.8 mm d^-1） over the ocean between 10°N and 20° N and significantly decreased（maximum decrease 〉-0.6 mm d^-1） between 10° S and 10° N. These changes caused a northward movement of precipitation cell in the Intertropical Convergence Zone（ITCZ）. Cloud cover significantly increased（by approximately 4%） in the high latitudes in both hemispheres, and sharply decreased（by approximately 3%） in tropical areas.