Grant, ER, Ross, AN, Gardiner, BA et al. (1 more author) (2015) Field observations of canopy flows over complex terrain. Boundary-Layer Meteorology, 156 (2). pp. 231-251. ISSN 0006-8314
Abstract
The investigation of airflow over and within forests in complex terrain has been, until recently, limited to a handful of modelling and laboratory studies. Here, we present an observational dataset of airflow measurements inside and above a forest situated on a ridge on the Isle of Arran, Scotland. The spatial coverage of the observations all the way across the ridge makes this a unique dataset. Two case studies of across-ridge flow under near-neutral conditions are presented and compared with recent idealized two-dimensional modelling studies. Changes in the canopy profiles of both mean wind and turbulent quantities across the ridge are broadly consistent with these idealized studies. Flow separation over the lee slope is seen as a ubiquitous feature of the flow. The three-dimensional nature of the terrain and the heterogeneous forest canopy does however lead to significant variations in the flow separation across the ridge, particularly over the less steep western slope. Furthermore, strong directional shear with height in regions of flow separation has a significant impact on the Reynolds stress terms and other turbulent statistics. Also observed is a decrease in the variability of the wind speed over the summit and lee slope, which has not been seen in previous studies. This dataset should provide a valuable resource for validating models of canopy flow over real, complex terrain.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2015, Springer. This is an author produced version of a paper published in Boundary-Layer Meteorology. Uploaded in accordance with the publisher's self-archiving policy. The final publication is available at Springer via http://dx.doi.org/10.1007/s10546-015-0015-y |
Keywords: | Atmospheric boundary layer; Complex terrain; Flow separation; Forest canopy; Hills |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst for Climate & Atmos Science (ICAS) (Leeds) The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > National Centre for Atmos Science (NCAS) (Leeds) |
Funding Information: | Funder Grant number NERC NE/C003691/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 07 May 2015 09:41 |
Last Modified: | 13 Mar 2016 23:53 |
Published Version: | http://dx.doi.org/10.1007/s10546-015-0015-y |
Status: | Published |
Publisher: | Springer Verlag |
Identification Number: | 10.1007/s10546-015-0015-y |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:84216 |