| 项目编号: | 1649067
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| 项目名称: | Collaborative Research: Parameterization of the Land-Surface Thermal and Moisture Heterogeneities |
| 作者: | Eric Pardyjak
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| 承担单位: | University of Utah
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| 批准年: | 2017
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| 开始日期: | 2017-08-15
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| 结束日期: | 2020-07-31
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| 资助金额: | 614921
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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 - Atmospheric and Geospace Sciences
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| 英文关键词: | surface temperature
; soil-moisture
; moisture fluctuation
; soil moisture
; atmospheric surface layer
; uniform rough surface
; moisture difference
; moisture variation
; model parameterization
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| 英文摘要: | This study seeks to create new fundamental knowledge and computer model representations for atmospheric simulations in regions where the land presents large thermal and moisture differences. The investigators will first conduct a high-resolution field experiment using transformative measurement techniques over the playa in Utah's West Desert, where the terrain is characterized by a relatively uniform rough surface with differences in both space and time of surface temperature and soil-moisture. Results from this field experiment will be used to: (1) investigate the time/space structure of the surface temperature and moisture fluctuations and (2) formulate new relationships or corrections that account for the differences in surface temperature and moisture.
The research seeks to address the challenges in representing heterogeneities in the Atmospheric Surface Layer (ASL) at finer scales where spatial averaging cannot be used to provide homogeneous fields. Field data will be collected over the Utah Playa, an area with relatively flat terrain and, presumably, uniform roughness; but variable temperature and soil moisture. The goal of this study is to run simulations at 100-meter (m) resolution using field data collected under weak stratification to develop new Large Eddy Simulation (LES) parameterizations; with anticipated improvements of 20%. The main hypothesis being tested is that the spatial structure of temperature and moisture variations will be represented in the detailed flux measurements, even over flat terrain. Results will be tested in both LES and mesoscale models. Initial experiments will be conducted for bare, dry soil conditions. The broader impacts include outreach and education activities with the public; as well as the potential to improve model parameterizations for numerical weather prediction models. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/89322
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Eric Pardyjak. Collaborative Research: Parameterization of the Land-Surface Thermal and Moisture Heterogeneities. 2017-01-01.
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