Wind Flow Dynamics Over Photovoltaic Power Plants Compared to Vegetated Canopies
Researchers have published new findings examining how wind moves across large-scale solar installations, drawing direct comparisons with natural vegetated landscapes. The study, led by Shunko Bolsée and colleagues including Sylvain Dupont, Éric Lamaud, Mark Irvine, Sébastien Lafont, Christophe Chipeaux, Cyriane Garrigou, Jean-Marc Bonnefond, Jean-Christophe Domec and Denis Loustau, appears in the journal Agricultural and Forest Meteorology.
The work focuses on turbulence patterns, momentum transfer and microclimate effects above photovoltaic arrays. Findings indicate that solar panel fields create distinct aerodynamic signatures that differ from those of forests or grasslands in measurable ways, with implications for both energy yield and local environmental conditions.
Publication Details and Research Team
The peer-reviewed paper is available at https://www.sciencedirect.com/science/article/pii/S0168192326002911. It credits the full author team for field measurements, modelling and analysis conducted at operational photovoltaic sites in France.
Shunko Bolsée served as lead author, coordinating the integration of high-resolution wind data with canopy-flow theory. Co-authors contributed expertise in boundary-layer meteorology, plant physiology and numerical simulation.
Key Findings on Wind Patterns
Measurements revealed that photovoltaic arrays produce stronger and more coherent wake regions immediately downwind of panel rows than those observed in vegetated canopies. Mean wind speeds within the array were reduced by up to 30 percent relative to open terrain, with turbulence intensity elevated near panel edges.
In contrast, vegetated canopies showed more gradual momentum absorption distributed through a deeper roughness sublayer. The study quantifies how panel height, spacing and orientation alter these patterns, providing data that can refine site-specific wind-resource assessments for solar developers.
Comparison with Natural Canopies
Direct side-by-side analysis demonstrated that photovoltaic fields behave like a porous, elevated roughness element rather than a flexible, multi-layered canopy. Drag coefficients derived from the solar arrays exceeded those of typical forest edges under similar wind regimes.
Researchers noted that the rigid geometry of panels creates sharper shear layers and intermittent gusts, whereas vegetation dissipates energy more uniformly through leaf and branch movement. These differences affect both surface temperature and evapotranspiration rates in the surrounding area.
Implications for Renewable Energy Development
Improved understanding of array-scale aerodynamics can help optimise panel layout to reduce soiling, enhance convective cooling and minimise structural loads during high-wind events. The data also support more accurate yield forecasting models used by project financiers and grid operators.
Site planners may incorporate the reported roughness parameters when evaluating new installations near agricultural land or protected habitats, ensuring that microclimate changes remain within acceptable limits.
Environmental and Microclimate Effects
The study recorded measurable shifts in near-surface temperature and humidity beneath and immediately downwind of the arrays. Night-time cooling was more pronounced over the photovoltaic field than over adjacent grassland, while daytime heating was moderated by panel shading and increased turbulence.
These observations align with broader efforts to quantify the land-atmosphere feedbacks associated with large-scale solar deployment. The authors suggest that careful design can mitigate potential impacts on local biodiversity and soil moisture regimes.
Methodology and Data Collection
Researchers deployed sonic anemometers at multiple heights above the arrays and in nearby vegetated reference plots. High-frequency sampling captured turbulent fluxes of momentum, heat and water vapour across a full range of wind directions and stability conditions.
Large-eddy simulations were validated against the field data, allowing extrapolation to different panel configurations and regional climates. The combined observational-modelling approach strengthens confidence in the reported differences between engineered and natural surfaces.
Broader Context in Renewable Energy Research
This publication contributes to an expanding body of work on the environmental performance of utility-scale solar. Earlier studies have examined albedo changes, bird interactions and dust deposition; the present analysis adds detailed fluid-dynamic insight.
By framing photovoltaic arrays as a distinct surface type, the research supports interdisciplinary modelling that links energy systems, atmospheric science and ecosystem services.
Photo by Harisankar on Unsplash
Future Research Directions
The authors recommend extending measurements to floating solar installations, agrivoltaic systems and arrays in arid or coastal environments. Additional work on seasonal vegetation growth within and around sites could further refine the comparison with natural canopies.
Integration of these aerodynamic findings into regional climate models is identified as a priority for assessing cumulative impacts of expanding solar capacity.
Relevance for Academic and Industry Stakeholders
University researchers in meteorology, renewable energy engineering and environmental science can use the dataset for teaching and further modelling. Industry practitioners gain practical parameters for layout optimisation and environmental impact assessments.
Funding agencies and policy bodies may reference the study when evaluating proposals that combine solar deployment with land-use planning or biodiversity offsets.
