气候变化领域集成服务门户(CCPortal): Lagrangian Coherent Structures and Vortex Formation in High Spatiotemporal-Resolution Satellite Winds of an Atmospheric Kármán Vortex Street

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DOI	10.1029/2021JD035000
	Lagrangian Coherent Structures and Vortex Formation in High Spatiotemporal-Resolution Satellite Winds of an Atmospheric Kármán Vortex Street
	Günther T.; Horváth Á.; Bresky W.; Daniels J.; Buehler S.A.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:19
英文摘要	Recent advances in geostationary imaging have enabled the derivation of high spatiotemporal-resolution cloud-motion winds for the study of mesoscale unsteady flows. Due to the general absence of ground truth, the quality assessment of satellite winds is challenging. In the current limited practice, straightforward plausibility checks on the smoothness of the retrieved wind field or tests on aggregated trends such as the mean velocity components are applied for quality control. In this study, we demonstrate additional diagnostic tools based on feature extraction from the retrieved velocity field. Lagrangian Coherent Structures (LCS), such as vortices and transport barriers, guide and constrain the emergence of cloud patterns. Evaluating the alignment of the extracted LCS with the observed cloud patterns can potentially serve as a test of the retrieved wind field to adequately explain the time-dependent dynamics. We discuss the suitability and expressiveness of direct, geometry-based, texture-based, and feature-based flow visualization methods for the quality assessment of high spatiotemporal-resolution winds through the real-world example of an atmospheric Kármán vortex street and its laboratory archetype, the 2D cylinder flow. © 2021 The Authors.
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236966
作者单位	Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany; Meteorological Institute, Universität Hamburg, Hamburg, Germany; I. M. Systems Group, Rockville, MD, United States; NOAA/NESDIS Center for Satellite Applications and Research, College Park, MD, United States
推荐引用方式 GB/T 7714	Günther T.,Horváth Á.,Bresky W.,et al. Lagrangian Coherent Structures and Vortex Formation in High Spatiotemporal-Resolution Satellite Winds of an Atmospheric Kármán Vortex Street[J],2021,126(19).
APA	Günther T.,Horváth Á.,Bresky W.,Daniels J.,&Buehler S.A..(2021).Lagrangian Coherent Structures and Vortex Formation in High Spatiotemporal-Resolution Satellite Winds of an Atmospheric Kármán Vortex Street.Journal of Geophysical Research: Atmospheres,126(19).
MLA	Günther T.,et al."Lagrangian Coherent Structures and Vortex Formation in High Spatiotemporal-Resolution Satellite Winds of an Atmospheric Kármán Vortex Street".Journal of Geophysical Research: Atmospheres 126.19(2021).