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雪是一种多孔材料，由联锁的冰粒、空气和水蒸气的复杂聚集体组成。 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学等许多更大的问题具有重要意义。 粘结颗粒的大小、形状和排列使雪具有复杂和各向异性的结构纹理。 这种纹理的几何形状在观察中记录得很差。 因此，热量和质量通过雪的运动目前难以估计和建模。 该研究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）记录观测到的三维框架内热量和质量通量的模式和异质性，（3）通过与观测结果进行比较，测试和改进热力学过程模型。 这些目标将通过实地，实验室和计算机建模工作在北极和高山研究所和山区研究站进行，无论是在大学。