【摘要】 利用区域气候模式对东亚地区人为硫酸盐的直接辐射强迫及其温度响应进行了数值研究。结果表明:（1） 人为硫酸盐直接辐射强迫具有明显的季节变化和地理分布特征,辐射强迫的这种变化特征不仅强烈地依赖于硫酸盐柱含量的季节变化和地理分布,而且取决于云量季节变化和地理分布。（2）就年平均而言,由于硫酸盐辐射强迫的影响,模拟区域内大部分地区普遍降温。降温比较明显的区域位于110°E以东、40°N以南的中国大陆地区,超过一0.1℃ 其中华北平原和长江中游的湖南、湖北形成两个降温大值中心,幅度超过-0.2℃。（3）地面温度响应呈现出明显的区域季节变化特征。冬春季节,温度响应与辐射强迫之间满足较好的对应关系;夏秋季节,二者呈现出复杂的非线性关系。更多还原

【Abstract】 A regional climate model (RegCM2-1996) is used to assess the direct radiative forcing (DRF) and its temperature effect due to tropospheric anthropogenic sulfate over the eastern Asia. The simulated results indicate: (1) the calculated DRF due to anthropogenic sulfate appears to be of obviously geographical and seasonal patterns, which mainly depend on the geographical and seasonal variations of sulfate loadings and cloud cover. (2) In the annual mean, the DRF of sulfate produces a widespread cooling throughout the simulated domain. The higher cooling is mainly localted in the eastern China of 100°E and the southern China of 40°N, where the annual mean temperature change exceeds -0.1℃. The maximum cooling centers are found in North China, Hunan and Hubei provinces where the value of cooling exceed -0.2℃. (3) The pattern of temperature response exhibits a strongly spatial and seasonal variations. During winter and spring, the pattern of response reflects the pattern of the forcing. But during summer and autumn, the temperature response to the DRF at the sub-regional scale is generally nonlinear.更多还原