Kent, Christoph; Grimmond, Sue; Barlow, Janet; Gatey, David; Kotthaus, Simone; Lindberg, Fredrik; Halios, Christos
Evaluation of Urban Local-Scale Aerodynamic Parameters: Implications for the Vertical Profile of Wind Speed and for Source Areas Journal Article
In: Boundary-Layer Meteorol (2017) 164:183–213, vol. Vol: 164(2), pp. 183-213, 2017.
Abstract | Links | BibTeX | Tags: Aerodynamic roughness length, Anemometric methods, Logarithmic wind-speed profile, Morphometric methods, Source area, Zero-plane displacement
@article{Kent2017,
title = {Evaluation of Urban Local-Scale Aerodynamic Parameters: Implications for the Vertical Profile of Wind Speed and for Source Areas},
author = {Christoph Kent and Sue Grimmond and Janet Barlow and David Gatey and Simone Kotthaus and Fredrik Lindberg and Christos Halios},
editor = {Boundary-Layer Meteorology},
url = {https://urbanfluxes.eu/wp-content/uploads/2018/01/2017_Kent_et_al_BLM.pdf},
doi = {10.1007/s10546-017-0248-z},
year = {2017},
date = {2017-04-28},
journal = {Boundary-Layer Meteorol (2017) 164:183–213},
volume = {Vol: 164(2)},
pages = {183-213},
abstract = {Nine methods to determine local-scale aerodynamic roughness length (z0) and zero-plane displacement (zd ) are compared at three sites (within 60 m of each other) in London, UK. Methods include three anemometric (single-level high frequency observations), six morphometric (surface geometry) and one reference-based approach (look-up tables). A footprint model is used with the morphometric methods in an iterative procedure. The results are insensitive to the initial zd and z0 estimates. Across the three sites, zd varies between 5 and 45 m depending upon the method used. Morphometric methods that incorporate roughness-element height variability agree better with anemometric methods, indicating zd is consistently greater than the local mean building height. Depending upon method and wind direction, z0 varies between 0.1 and 5 m with morphometric z0 consistently being 2–3 m larger than the anemometric z0. No morphometric method consistently resembles the anemometric methods. Wind-speed profiles observed with Doppler lidar provide additional data with which to assess the methods. Locally determined roughness parameters are used to extrapolate wind-speed profiles to a height roughly 200 m above the canopy. Wind-speed profiles extrapolated based on morphometric methods that account for roughness-element height variability are most similar to observations. The extent of the modelled source area for measurements varies by up to a factor of three, depending upon the morphometric method used to determine zd and z0},
keywords = {Aerodynamic roughness length, Anemometric methods, Logarithmic wind-speed profile, Morphometric methods, Source area, Zero-plane displacement},
pubstate = {published},
tppubtype = {article}
}
Kent, Christoph; Grimmond, Sue; Barlow, Janet; Gatey, David; Kotthaus, Simone; Lindberg, Fredrik; Halios, Christos
Evaluation of Urban Local-Scale Aerodynamic Parameters: Implications for the Vertical Profile of Wind Speed and for Source Areas Journal Article
In: Boundary-Layer Meteorol (2017) 164:183–213, vol. Vol: 164(2), pp. 183-213, 2017.
@article{Kent2017,
title = {Evaluation of Urban Local-Scale Aerodynamic Parameters: Implications for the Vertical Profile of Wind Speed and for Source Areas},
author = {Christoph Kent and Sue Grimmond and Janet Barlow and David Gatey and Simone Kotthaus and Fredrik Lindberg and Christos Halios},
editor = {Boundary-Layer Meteorology},
url = {https://urbanfluxes.eu/wp-content/uploads/2018/01/2017_Kent_et_al_BLM.pdf},
doi = {10.1007/s10546-017-0248-z},
year = {2017},
date = {2017-04-28},
journal = {Boundary-Layer Meteorol (2017) 164:183–213},
volume = {Vol: 164(2)},
pages = {183-213},
abstract = {Nine methods to determine local-scale aerodynamic roughness length (z0) and zero-plane displacement (zd ) are compared at three sites (within 60 m of each other) in London, UK. Methods include three anemometric (single-level high frequency observations), six morphometric (surface geometry) and one reference-based approach (look-up tables). A footprint model is used with the morphometric methods in an iterative procedure. The results are insensitive to the initial zd and z0 estimates. Across the three sites, zd varies between 5 and 45 m depending upon the method used. Morphometric methods that incorporate roughness-element height variability agree better with anemometric methods, indicating zd is consistently greater than the local mean building height. Depending upon method and wind direction, z0 varies between 0.1 and 5 m with morphometric z0 consistently being 2–3 m larger than the anemometric z0. No morphometric method consistently resembles the anemometric methods. Wind-speed profiles observed with Doppler lidar provide additional data with which to assess the methods. Locally determined roughness parameters are used to extrapolate wind-speed profiles to a height roughly 200 m above the canopy. Wind-speed profiles extrapolated based on morphometric methods that account for roughness-element height variability are most similar to observations. The extent of the modelled source area for measurements varies by up to a factor of three, depending upon the morphometric method used to determine zd and z0},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
