提出了城市大气污染源追踪“广义判识”综合应用平台、模式源同化及其卫星遥感应用等新技术。“广义判识”综合应用平台包括气溶胶源主因子分析方法、气溶胶周期变化谱分析法、城市冠层大气污染变化规律同位相特性分析、追溯远距离空气污染源的合成风场相关矢量法、后向轨迹示踪法和边界层影响足痕分析法；另外，为解决长期以来大气污染模式中排放源不确定性的关键技术难点，采用源同化牛顿逼近Nudging技术，获取具有季节、月变化动态变化特征的SO2、NO2区域反演源排放清单。将卫星遥感资料应用在同化模型，探索空气污染预报模式的卫星遥感产品应用技术，卫星遥感—地基观测综合分析平台亦可广泛地应用于城市污染源追踪、城市雾和城市热岛的研究，并提出多圈层水—土—气综合分析方法是一种追踪水污染源的探索性尝试

An ensemble platform on generalized source tracking of urban air pollutants and an emission source assimilation with application of satellite remote sensing has been proposed. The ensemble platform of generalized urban air pollutant source tracking is built on principal factor analysis of aerosol emissions, aerosol variation spectrum analysis, feature analysis on aerosol changes with phase within urban canopy layer, wind vectors correlating with remote pollutant transport, back forward trajectories and boundary layers affecting the foot mark methods. Also, in order to reduce the emission source uncertainties, which is a key difficulty in air quality modeling, the Newton approximation nudging technology has been applied in the air pollutant modeling based on the seasonal or monthly SO2 and NO2 emissions, and the remote sensing data of air pollutants have been applied on the data assimilation in air pollutant modeling. The integration approach with remote sensing and ground based observations could be used in the research on urban air pollutant tracking, urban haze and heat island. The comprehensive analysis of land water air cycles is attempted as an exploratory study on water pollutant source tracking.

徐祥德（1942— ） ，男，浙江余姚市人，中国工程院院士，中国气象科学研究院研究员，博士生导师，研究方向为气象科