Frequent Weak-wind Boundary Layers Using New Analysis Techniques in the Space-time Domain

GSTDTAP

项目编号	1614345
	Frequent Weak-wind Boundary Layers Using New Analysis Techniques in the Space-time Domain
	Larry Mahrt
主持机构	NorthWest Research Associates, Incorporated
项目开始年	2016
	2016-10-01
项目结束日期	2019-09-30
资助机构	US-NSF
项目类别	Standard Grant
项目经费	603142(USD)
国家	美国
语种	英语
英文摘要	This study seeks to improve our understanding of the interaction of weak wind flow in the lowest layer of the atmosphere and generation of turbulence in gently sloping terrain. An improved understanding of weak-wind boundary layers could potentially lead to more accurate modeling of the formation of cold pools, damaging frost (including impact to local vineyards), fog formation, and dispersion of contaminants. This study seeks to investigate weak-wind boundary layers using detailed spatial-temporal measurements. These boundary layers demonstrate non-stationarity and the turbulence in them is generally in a non-equilibrium state with the mean flow. Previous studies of such boundary layers were mostly limited to temporal data at fixed locations, and therefore could not take into account hysteresis when investigating scaling properties. This study analyzes detailed spatial-temporal data to form a more complete picture of boundary layer structures. The evolution of the structures and the impact of the sub-mesoscale motions will be investigated.
来源学科分类	Geosciences - Atmospheric and Geospace Sciences
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/70519
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Larry Mahrt.Frequent Weak-wind Boundary Layers Using New Analysis Techniques in the Space-time Domain.2016.