积雪反照率反馈强度主要受积雪覆盖率反馈和积雪形变反馈的影响。本文利用一个理想物理模型，将积雪反照率反馈强度的两大影响因子分离开，在未来典型浓度路径RCP4.5和RCP8.5气候情景下，对BNU-ESM模式的积雪反照率反馈强度进行量化计算与分析。计算分析结果表明积雪反照率反馈强度主要受积雪覆盖率变化的影响，而积雪覆盖率变化又主要受有效积雪反照率的影响。积雪反照率参数化方案是影响模式积雪反照率反馈强度的主要因素。改进积雪参数化方案有助于提高模式对积雪反馈过程的模拟能力。

The strength of snow albedo feedback (SAF) is mainly determined by snow cover feedback and snow metamorphosis feedback. This study uses an idealized physical model to separate the two influencing factors of snow albedo feedback. Under the future climate scenarios of Representative Concentration Pathways 4.5 (RCP4.5) and 8.5 (RCP8.5), the influencing factors are correspondingly quantified and analyzed with Beijing Normal University Earth System Model (BNU-ESM), which is a comprehensive climate system model used for climate mechanism study and future climate projection. The results show that the strength of snow albedo feedback is mainly determined by the snow cover feedback, and the snow cover feedback is mainly determined by the effective snow albedo. The snow albedo parameterization scheme is the main factor that determines the strength of snow albedo feedback. Improving snow albedo parameterization scheme may reduce the uncertainties of the snow albedo feedback.