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| Content Provider | Springer Nature Link |
|---|---|
| Author | Qiu, J. Gu, Z. L. Wang, Z. S. |
| Copyright Year | 2008 |
| Abstract | High-accuracy large-eddy simulations of neutral atmospheric surface-layer flow over a gapped plant canopy strip have been performed. Subgrid-scale (SGS) motions are parameterized by the Sagaut mixed length SGS model, with a modification to compute the SGS characteristic length self-adaptively. Shaw’s plant canopy model, taking the vertical variation of leaf area density into account, is applied to study the response of the atmospheric surface layer to the gapped dense forest strip. Differences in the region far away from the gap and in the middle of the gap are investigated, according to the instantaneous velocity magnitude, the zero-plane displacement, the potential temperature and the streamlines. The large-scale vortex structure, in the form of a roll vortex, is revealed in the region far away from the gap. The nonuniform spatial distribution of plants appears to cause the formation of the coherent structure. The roll vortex starts in the wake of the canopy, and results in strong fluctuations throughout the entire canopy region. Wind sweeps and ejections in the plant canopy are also attributed to the large vortex structure. |
| Starting Page | 293 |
| Ending Page | 311 |
| Page Count | 19 |
| File Format | |
| ISSN | 00068314 |
| Journal | Boundary-Layer Meteorology |
| Volume Number | 127 |
| Issue Number | 2 |
| e-ISSN | 15731472 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2008-01-24 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Atmospheric surface layer Large-eddy simulation Plant canopy Atmospheric Protection/Air Quality Control/Air Pollution Meteorology/Climatology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atmospheric Science |
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