A Regional Model of the Arctic Land-Atmosphere System

该项目的目标是实施北极大气-陆地系统的区域模型，用于ARCSS LAII（陆地-大气-冰相互作用）项目的通量研究。具体目标是：(1)模拟控制阿拉斯加北部地区水文和微量气体通量的陆地-大气相互作用，以及(2)预估该地区气候和地表强迫的变化。大气模拟利用NCAR/宾夕法尼亚州立大学的中尺度分析提供了侧向强迫。地表交换将利用其他通量研究项目中正在开发的土壤-植被和水文模型的耦合。其他通量研究项目提供的中尺度地形、植被和土壤数据也将纳入该模式。区域模型为通量研究的地块、塔架和飞机测量地表通量的放大提供了框架。最后，全球环流模式的输出将用于在一系列温室气体引起的气候变化实验中驱动区域模式，从而为评估未来微量气体通量提供高分辨率的区域气候变化情景。＊＊＊

OPP-9318533 Walsh The goal of this project is the implementation of a regional model of the arctic atmosphere-land system for use in the Flux Study of the ARCSS LAII (Land-Atmosphere-Ice Interactions) program. Specific objectives are (1) to simulate the land-atmosphere interactions that control the hydrology and the trace gas fluxes over the northern Alaskan region, and (2) to project changes in the climate and surface forcing of this region. The atmospheric simulations utilize the NCAR/Penn State mesocale analyses provide the lateral forcing. The surface exchanges will draw upon a coupling to soil-vegetation and hydrological models under development in other Flux Study projects. Mesoscale topography, vegetation and soil data, also provided by other Flux Study projects, will be incorporated into the model. The regional model provides framework for the scaling-up of the Flux Study's plot, tower and aircraft measurements of the surface fluxes. Finally, output from a global circulation model will be used to drive the regional model in a series of greenhouse-induced climate change experiments, thereby providing high-resolution scenarios of regional climate change for assessments of future trace gas fluxes. ***