Three-Dimensional Analysis of the Geometry of Heat and Mass Fluxes in Dry Snow

[901492][译文]干雪是一种多孔材料，由连锁的冰粒、空气和水蒸气的复杂集合体组成。雪是地球气候、水文和生态系统的重要组成部分，因此雪中的热力学过程对理解气候重建和融雪水文等许多更大的问题具有重要意义。结合颗粒的大小、形状和排列使雪具有复杂的各向异性结构纹理。这种纹理的几何形状通过观察得到的记录很少。因此，热量和质量在雪中的运动目前很难估计和模拟。该奖学金将通过三个主要研究途径解决这些问题：(1)对雪的三维结构进行观测调查；(2)在观测到的三维框架内记录热量和质量通量的模式和非均质性；(3)通过与观测结果的比较来测试和改进热力学过程模型。这些目标将通过在大学的北极和高山研究所和山地研究站进行的实地、实验室和计算机建模工作来实现。

9901492HarperDry snow is a porous material consisting of a complex aggregate of interlocking ice grains, air, and water vapor. Snow is an important component of the earth's climate, hydrological, and ecological systems, and consequently thermodynamic processes within snow have implications for understanding many greater problems such as climate reconstruction and snow-melt hydrology. The size, shape, and arrangement of bonded grain gives snow a complex and anisotropic structural texture. The geometry of this texture has been poorly documented with observation. The movement of heat and mass through snow is, therefore, currently difficult to estimate and model. The fellowship will address these issues through three main avenues of research: (1) observational investigations of the three-dimensional structure of snow, (2) documentation of the modes and heterogeneity of heat and mass flux within the observed three-dimensional framework, and (3) testing and improvement of models for thermodynamic processes by comparisons with observations. These objectives will be attained through field, laboratory, and computer modeling work to be conducted at the Institute of Arctic and Alpine Research and the Mountain Research Station, both at the University.