风吹雪是决定青藏高原积雪时空分布和演变的关键因素。现有用于气候与生态水文过程模拟的陆面模式大多缺乏考虑风吹雪过程的影响，导致高原地区积雪期积雪及地-气相互作用过程模拟存在显著偏差。本项目拟利用高原风吹雪高发区的大气边界层与陆面过程观测以及站点雪深观测，间接确定站点尺度的风吹雪发生状况；通过补充风吹雪直接观测，发展综合考虑高原气温、风速、地形及下垫面特征等气候环境因素对风吹雪发生影响的风吹雪-陆面耦合模式，进一步改进模式对于高原地区风吹雪发生的描述；通过开展气候变化情景下的风吹雪数值模拟试验，揭示气候变化下高原风吹雪发生的时空变化特征，辨析风吹雪过程在青藏高原积雪覆盖时空格局演变中的重要作用。该研究的开展不仅能促进高原地区风吹雪发生与发展规律的认识，提高陆面模式青藏高原积雪过程的模拟，而且能为该地区风吹雪灾害的防治等研究提供科学支撑。

Blowing snow is a key factor determining the spatial and temporal distribution of snow and its evolution over the Tibetan Plateau (TP). However, the impacts of blowing snow processes are neglected in most of the current land surface models, resulting in a great deviation in the simulation of the land-atmosphere interactions during the snow-covered period. In this plan, the characteristic of blowing snow occurrence is indirectly obtained at site-scale by using atmospheric boundary layer observations and snow depth observations. By adding direct blowing snow observations, the blowing snow-land surface model with the effects of climatic and environmental considered will be developed for further improving the representation of the blowing snow process in alpine mountain regions. Simulations will be performed to reveal the variations of the blowing snow in spatial and temporal with climate change. The important role the blowing snow plays in the distribution and the evolution of the snow cover over the TP will also be investigated. This study can not only improve the performance of the land surface model in the simulations of land-atmosphere interactions, but also can promote the understanding of the occurrence and the development of blowing snow process over the TP, and provide scientific support for the disaster prevention of blowing snow in this region.