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

干雪中热量和质量通量几何形状的三维分析

• 批准号: 9901492
• 负责人: Joel Harper
• 金额: $ 7.2万
• 依托单位: Fellowships
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-09-01 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9901492&HistoricalAwards=false
• 关键词: Three; Dimensional; Analysis; Geometry; Heat

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.

9901492Harperdry Snow是一种多孔材料，该材料由互锁的冰粒，空气和水蒸气组成。 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许多更大的问题（例如气候重建和雪融合水文学）具有影响。 粘合谷物的大小，形状和排列使雪具有复杂而各向异性的结构质地。 通过观察，这种纹理的几何形状已经证明了很差。 因此，热量和质量通过雪的运动目前难以估计和模型。 奖学金将通过研究的三个主要途径解决这些问题：（1）对雪的三维结构的观察研究，（2）在观察到的三维框架中热量和质量通量的模式和异质性的文献，以及（3）通过比较观察的热力学过程的模型测试和改进。 这些目标将通过北极和高山研究所以及山区研究站进行的现场，实验室和计算机建模工作实现。