Simulation of seasonal snow-cover distribution for glacierized sites on Sonnblick, Austria, with the Alpine3D model
Simulation of seasonal snow-cover distribution for glacierized sites on Sonnblick, Austria, with the Alpine3D model
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使用 Alpine3D 模型模拟奥地利 Sonnblick 冰川地点的季节性积雪分布
DOI：
10.3189/172756408787814924
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发表时间：
2008
影响因子：
2.9
通讯作者：
Wolfgang Schӧner
中科院分区：
文献类型：
--
作者：
R. Mott;F. Faure;M. Lehning;Henning Lӧwe;B. Hynek;Gernot Michlmayer;A. Prokop;Wolfgang Schӧner
摘要利用一个详细的阿尔卑斯山地表过程模型，模拟了两个高山冰川（奥地利阿尔卑斯山的Goldbergstrike和Kleinfleißstrike）的优先沉积量以及雪堆引起的雪的再分布。积雪建模的顺序包括用中尺度大气模型模拟风场、三维有限元漂移模块、能量平衡模块和积雪模块。除风场模型外的所有模块都集成在Alpine 3D模型框架内。Alpine 3D的漂移模块区分了跃变和悬浮，能够捕捉到雪降水的优先沉积和先前沉积的雪的重新分布。使用空间密集的雪探测数据集在2003年5月的运动期间收集的模拟雪深的验证。模拟的雪深与2002/03年冬季的测量结果一致，在详细的雪高监测的位置，考虑到冰川上的雪深的高空间变异性。此外，雪积累的模型结果与详细的探测2003年5月1日的总冰川面积的比较表明，阿尔卑斯山3D是能够捕捉主要的空间分布模式的雪积累。这是第一次，阿尔卑斯山3D的方法，使用高分辨率的风场从气象模型和物理描述的雪运输可以验证一个非常陡峭的冰川化地区和一个完整的积累季节。结果表明，漂移是一个主导因素，要考虑详细的冰川质量平衡。在这项研究中没有考虑的另一个主导因素可能是雪崩引起的雪再分布。
Abstract A detailed model of Alpine surface processes is used to simulate the amount of preferential deposition as well as redistribution of snow due to snowdrift for two alpine glaciers (Goldbergkees and Kleinfleißkees, Austrian Alps). The sequence of snow-cover modelling consists of the simulation of the wind field with a mesoscale atmospheric model, a three-dimensional finite-element drift module, an energy-balance module and a snowpack module. All modules with the exception of the wind-field model are integrated within the Alpine3D model frame. The drift module of Alpine3D distinguishes between saltation and suspension and is able to capture preferential deposition of snow precipitation and redistribution of previously deposited snow. Validation of the simulated snow depth is done using the spatially dense snow-probing dataset collected during a campaign in May 2003. Simulated snow depths agree with measurements during winter 2002/03 at locations with detailed snow-height monitoring, taking into account the high spatial variability of snow depth on the glacier. Moreover, comparison of snow accumulation from model results with detailed probing on 1 May 2003 for the total glacier area shows that Alpine3D is able to capture major patterns of spatial distribution of snow accumulation. For the first time, the Alpine3D approach of using high-resolution wind fields from a meteorological model and a physical description of snow transport could be validated for a very steep glacierized area and for a full accumulation season. The results show that drift is a dominant factor to be considered for detailed glacier mass balances. Another dominant factor not considered in this study may be snow redistribution due to avalanches.