| 项目编号: | 1503917
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| 项目名称: | Three Dimensional Computer Simulations of Maxwell Equations and Snow Microstructures for Active and Passive Microwave Observations of Snow on Sea Ice in a Changing Climate |
| 作者: | Leung Tsang
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| 承担单位: | University of Michigan Ann Arbor
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| 批准年: | 2014
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| 开始日期: | 2015-08-01
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| 结束日期: | 2018-07-31
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| 资助金额: | USD283627
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Polar
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| 英文关键词: | snow
; sea ice
; snow albedo
; snow particle
; snow thickness
; snow cover
; real snow
; 3d snow microstructure
; snow parameter
; snow depth
; sea-ice
; computer code
; 3d simulation
; microwave region
; microwave signature
; microwave signal
; three-dimensional computer simulation
; spaceborne observation
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| 英文摘要: | Snow cover plays a key role in Arctic sea ice processes, and it has thinned significantly in recent decades. In winter, it insulates sea ice from cold air temperatures, slowing sea ice growth. In spring-summer, snow albedo exerts a control on solar heat absorbed by the sea ice and underlying ocean, impacting ice melt processes. Thus, snow thickness, distribution, and density, can moderate the recovery of the sea ice pack or exacerbate its loss. Airborne and satellite remote sensing are used to monitor snow depth over sea ice. Interpretation of the remotely sensed microwave signals requires accurate models of how the microwaves interact with the snow. This project will develop electromagnetic models that relate the microwave signatures quantitatively to physical parameters of snow. It will contribute to STEM workforce development by providing support for the training of a graduate student. The computer code for the model will be made publicly available and provide a resource for the Arctic science community.
The proposed project will improve the extraction of snow parameters from airborne and spaceborne observations through the modeling of the interaction between snow particles and electromagnetic waves in the microwave region. In particular, the project will generate 3D simulations of the solution to Maxwell's equations in the presence of 3D snow microstructure. Results will be applied to the analysis of active and passive microwave remote sensing data of snow over sea ice. Three-dimensional computer simulations of microstructures of snow that resemble that of real snow will be performed on High Performance Computing (HPC) systems to compute scattering and emission of snow covering sea-ice. The use of large scale high performance computations will permit the simulations to be run over relatively large spatial domains. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/93890
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Leung Tsang. Three Dimensional Computer Simulations of Maxwell Equations and Snow Microstructures for Active and Passive Microwave Observations of Snow on Sea Ice in a Changing Climate. 2014-01-01.
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