| 项目编号: | 1531690
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| 项目名称: | Collaborative Research: Impact of Snowfall Processes on Potential Vorticity Generation in High-Latitude Snow Events |
| 作者: | Tristan L'; Ecuyer
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| 承担单位: | University of Wisconsin-Madison
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| 批准年: | 2014
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| 开始日期: | 2015-09-15
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| 结束日期: | 2018-08-31
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| 资助金额: | USD366877
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| 资助来源: | US-NSF
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| 项目类别: | Continuing 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: | snowfall
; impact
; research
; next generation
; multi-angle snowflake camera
; research award
; forecast storm event
; snowfall microphysical property
; satellite radar snowfall retrieval scheme
; snowfall process
; distinct high-latitude meteorological extreme
; research team
; numerical model
; potential vorticity modification
; snowflake statistics
; collaborative team
; storm event
|
| 英文摘要: | Precipitation processes, such as evaporation and condensation, have the ability to affect the large-scale weather systems in which they are embedded. This research award will provide funding for a collaborative team of researchers to study how snowfall processes affect overall storm evolution. The research will make use of ground-based instrumentation, remote sensing, and numerical modeling to gain a better picture of the profile of snowflakes in a storm and whether the models are representing the snow correctly. Differences between the observations and the models will indicate the relative importance of snowfall processes in storm events. The result of the award should be improved modeling for both weather and climate purposes and enhanced international scientific collaboration between the United States, Norway and Sweden. Students would be educated and trained, ensuring the development of the next generation of scientists.
The research team plans to contrast real-world observations of the spatial and vertical distributions of snowfall with the representation in numerical models, and seek to quantify the impacts of any differences on storm evolution. The goal would be to better define the relationships between microphysical and dynamical processes for three meteorologically distinct high-latitude meteorological extremes (Alaska, Norway and Sweden). The observational component of the research will include in-situ measurements of snowflake statistics using the Multi-Angle Snowflake Camera and remote sensing from radars using an existing satellite radar snowfall retrieval scheme. The modeling aspect of the work would be performed using the HARMONIE, ECMWF-IFS, and WRF systems. Three main objectives will be addressed in the project: 1) Quantify real-world vertical profiles of snowfall microphysical properties with uncertainties at each site, 2) Compare observations of the vertical profile of precipitation properties with their representation in numerical model for different synoptic conditions, and 3) Evaluate the impact of discrepancies in modeled and observed precipitation profiles on potential vorticity modification for forecast storm events at each site. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/93188
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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: | |
Tristan L',Ecuyer. Collaborative Research: Impact of Snowfall Processes on Potential Vorticity Generation in High-Latitude Snow Events. 2014-01-01.
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