Lanthanide Optical Spectroscopy

这项由美国科罗拉多大学的威廉·布鲁门博士与南京大学的赵明、吴荣生教授共同提出的“山区大气锋面研究”项目，是由美国国家科学基金会和中国国家教委联合发起的。研究人员计划研究影响地球地形上大气锋面运动的物理过程，特别是中国的山区。他们将强调行星边界层在这一过程中的作用。这些研究将包括：1)观测和分析研究地形造成锋面扭曲的各种情况；2)通过数值模拟模拟锋面运动，如中国西部的天山杂岩；3)理论研究锋面运动和行星边界过程之间的关系。研究人员将在南京大学进行前两个阶段的研究，数据、分析程序和数值模式资源都在那里。中国调查人员将在与美国调查人员磋商的情况下规划和执行这些方面的研究。理论阶段，包括数值实验的分析，将通过访问共同进行。科学家们还没有完全了解影响山区锋面通道的物理过程，这使得数值天气预报变得复杂。网格分辨率和模式物理可能不足以充分描绘锋面，因此，大型山脉复合体附近的气象预报通常比其他地方更不可靠。这项拟议的研究对中国和美国的调查人员都有共同利益。在《中国》中，对地形效应的特别强调将使西方科学家接触到以前不容易获得的气象观测，资源的共享为研究计划做出了贡献。

This proposal on "A Study of Atmospheric Fronts Over Mountainous Terrain" between Dr. William Blumen of the University of Colorado and Professors ZHAO Ming and WU Rongsheng of Nanjing University is jointly sponsored by NSF and the Chinese State Educational Commission (SEDC). The investigators propose to study physical processes that affect atmospheric frontal motions over the earth's orography, specifically the mountainous regions of China. They will emphasize the role of the planetary boundary layer in this process. The investigations will consist of 1) observational and analysis study to document and examine various cases of frontal distortion by orography; 2) a numerical modelling effort to simulate frontal motion over terrain features such as the Tien Shan complex in western China; and 3) a theoretical study to examine the relation between frontal motion and planetary boundary processes. The investigators will carry out the first two phases at Nanjing University, where the data, analysis procedures and numerical model resources are. The Chinese investigators will plan and execute these aspects of the research in consultation with the American investigator. The theoretical phases, including analysis of the numerical experiments, will be carried out jointly through visits. Scientists do not completely understand the physical processes that affect frontal passage over mountainous terrain, complicating numerical weather prediction. The grid resolution and model physics may be insufficient to depict fronts adequately and, therefore, meteorological predictions in the vicinity of large mountain complexes are generally less reliable than elsewhere. The proposed research is of mutual interest to both the Chinese and American investigators. The particular emphasis placed on orographic effects in China will expose Western scientists to meteorological observations that have not been readily accessible, and the sharing of resources contributes to the research program.