Observation of wind and thermodynamic structure within an urban boundary layer

J. Y. He; P. W. Chan; Z. F. Liu; J. C. H. Fung; Q. S. Li

doi:10.1063/5.0214961

Observation of wind and thermodynamic structure within an urban boundary layer

J. Y. He, P. W. Chan, Z. F. Liu, J. C. H. Fung, Q. S. Li^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

5 Citations (Scopus)

14 Downloads (CityUHK Scholars)

Abstract

Understanding the fluid dynamics and thermodynamics in the urban atmospheric boundary layer (ABL) is of great practical importance. Based on one-year observations from two advanced remote sensing instruments, namely, the wind lidar and the microwave radiometer, this study investigates the urban ABL structure in a densely built downtown area of Hong Kong. Atmospheric stability, ABL height, wind shear, and wind veer are statistically analyzed. The interconnections among wind speed profiles, wind direction profiles, ABL stability, and ABL height are comprehensively examined. Some features of the wind and thermodynamic structure are observed, such as the prevalence of unstable conditions in the urban ABL and the increase in wind shear and veer with ABL stability. The research outcomes are expected to contribute to the understanding of urban meteorology and offer scientific insights into the influences of urban terrain on the ABL and the vertical and temporal structure of wind and thermodynamic properties in the urban ABL. © 2024 Author(s).

Original language	English
Article number	086603
Journal	Physics of Fluids
Volume	36
Issue number	8
Online published	2 Aug 2024
DOIs	https://doi.org/10.1063/5.0214961
Publication status	Published - Aug 2024

Funding

The work described in this paper was fully supported by grants from Environmental Conservation Fund (ECF) of Hong Kong (Project No. 9211349(ECF 2022-74)), City University of Hong Kong (Project Nos. 7020026 and 9667218), the National Natural Science Foundation of China (Project No. 52278538), and the Research Grants Council of Hong Kong (Project No. T22-501/23-R and CityU 11213523).

Publisher's Copyright Statement

COPYRIGHT TERMS OF DEPOSITED FINAL PUBLISHED VERSION FILE: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in J. Y. He, P. W. Chan, Z. F. Liu, J. C. H. Fung, Q. S. Li; Observation of wind and thermodynamic structure within an urban boundary layer. Physics of Fluids 1 August 2024; 36 (8): 086603 and may be found at https://doi.org/10.1063/5.0214961.

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Cite this

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title = "Observation of wind and thermodynamic structure within an urban boundary layer",

abstract = "Understanding the fluid dynamics and thermodynamics in the urban atmospheric boundary layer (ABL) is of great practical importance. Based on one-year observations from two advanced remote sensing instruments, namely, the wind lidar and the microwave radiometer, this study investigates the urban ABL structure in a densely built downtown area of Hong Kong. Atmospheric stability, ABL height, wind shear, and wind veer are statistically analyzed. The interconnections among wind speed profiles, wind direction profiles, ABL stability, and ABL height are comprehensively examined. Some features of the wind and thermodynamic structure are observed, such as the prevalence of unstable conditions in the urban ABL and the increase in wind shear and veer with ABL stability. The research outcomes are expected to contribute to the understanding of urban meteorology and offer scientific insights into the influences of urban terrain on the ABL and the vertical and temporal structure of wind and thermodynamic properties in the urban ABL. {\textcopyright} 2024 Author(s).",

author = "He, {J. Y.} and Chan, {P. W.} and Liu, {Z. F.} and Fung, {J. C. H.} and Li, {Q. S.}",

year = "2024",

month = aug,

doi = "10.1063/5.0214961",

language = "English",

volume = "36",

journal = "Physics of Fluids",

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publisher = "American Institute of Physics",

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AU - He, J. Y.

AU - Chan, P. W.

AU - Liu, Z. F.

AU - Fung, J. C. H.

AU - Li, Q. S.

PY - 2024/8

Y1 - 2024/8

N2 - Understanding the fluid dynamics and thermodynamics in the urban atmospheric boundary layer (ABL) is of great practical importance. Based on one-year observations from two advanced remote sensing instruments, namely, the wind lidar and the microwave radiometer, this study investigates the urban ABL structure in a densely built downtown area of Hong Kong. Atmospheric stability, ABL height, wind shear, and wind veer are statistically analyzed. The interconnections among wind speed profiles, wind direction profiles, ABL stability, and ABL height are comprehensively examined. Some features of the wind and thermodynamic structure are observed, such as the prevalence of unstable conditions in the urban ABL and the increase in wind shear and veer with ABL stability. The research outcomes are expected to contribute to the understanding of urban meteorology and offer scientific insights into the influences of urban terrain on the ABL and the vertical and temporal structure of wind and thermodynamic properties in the urban ABL. © 2024 Author(s).

AB - Understanding the fluid dynamics and thermodynamics in the urban atmospheric boundary layer (ABL) is of great practical importance. Based on one-year observations from two advanced remote sensing instruments, namely, the wind lidar and the microwave radiometer, this study investigates the urban ABL structure in a densely built downtown area of Hong Kong. Atmospheric stability, ABL height, wind shear, and wind veer are statistically analyzed. The interconnections among wind speed profiles, wind direction profiles, ABL stability, and ABL height are comprehensively examined. Some features of the wind and thermodynamic structure are observed, such as the prevalence of unstable conditions in the urban ABL and the increase in wind shear and veer with ABL stability. The research outcomes are expected to contribute to the understanding of urban meteorology and offer scientific insights into the influences of urban terrain on the ABL and the vertical and temporal structure of wind and thermodynamic properties in the urban ABL. © 2024 Author(s).

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DO - 10.1063/5.0214961

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Observation of wind and thermodynamic structure within an urban boundary layer

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GRF: Observation and Modelling of Atmospheric Boundary Layer Wind and Turbulence Structures of Hazardous Windstorms

TBRS-ExtU-Lead: INTACT: Intelligent Tropical-storm-resilient System for Coastal Cities

ECF: Environment and Conservation Fund - Modelling the Effects of Noise Barriers and Moving Vehicles on Traffic-induced Air Pollution Dispersion in Urban Areas of Hong Kong

Cite this

Observation of wind and thermodynamic structure within an urban boundary layer

Abstract

Funding

Publisher's Copyright Statement

RGC Funding Information

Access Output

Other Access Options

Permanent Link

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Projects

GRF: Observation and Modelling of Atmospheric Boundary Layer Wind and Turbulence Structures of Hazardous Windstorms

TBRS-ExtU-Lead: INTACT: Intelligent Tropical-storm-resilient System for Coastal Cities

ECF: Environment and Conservation Fund - Modelling the Effects of Noise Barriers and Moving Vehicles on Traffic-induced Air Pollution Dispersion in Urban Areas of Hong Kong

Cite this