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Resource Documents by Baidya Roy, Somnath

Slawsky, Lauren; Baidya Roy, Somnath; et al.
Observed Thermal Impacts of Wind Farms Over Northern Illinois 
Abstract — This paper assesses impacts of three wind farms in northern Illinois using land surface temperature (LST) data from the Moderate Resolution Imaging Spectroradiometer (MODIS) instruments onboard the Terra and Aqua satellites for the period 2003–2013. Changes in LST between two periods (before and after construction of the wind turbines) and between wind farm pixels and nearby non-wind-farm pixels are quantified. An areal mean increase in LST by 0.18–0.39 °C is observed at nighttime over the wind farms, with . . . Complete article »

Cervarich, Michael; Baidya Roy, Somnath; and Zhou, Liming
Spatiotemporal structure of wind farm–atmospheric boundary layer interactions 
Abstract – Observations and modelling studies show that wind farms can alter their local microclimate. This study examines the effect of real-world wind farms on land surface temperatures in West Central Texas using the Weather Research and Forecasting model under realistic boundary conditions. Three wind turbine parameterizations, including two developed in this study, are used for model sensitivity experiments. The simulated effects of wind farms on temperatures match the spatial patterns observed in satellite data but are weaker in magnitude. The . . . Complete article »

Baidya Roy, Somnath
Simulating impacts of wind farms on local hydrometeorology 
ABSTRACT – Wind power is one of the fastest growing energy sources in the world, most of the growth being in large wind farms that are often located on agricultural land near residential communities. This study explores the possible impacts of such wind farms on local hydrometeorology using a mesoscale model equipped with a rotor parameterization based on data from a commercial wind turbine. Results show that wind farms significantly affect near-surface air temperature and humidity as well as surface sensible . . . Complete article »

Baidya Roy, Somnath; and Traiteur, Justin
Impacts of wind farms on surface air temperatures 
Abstract: Utility-scale large wind farms are rapidly growing in size and numbers all over the world. Data from a meteorological field campaign show that such wind farms can significantly affect near-surface air temperatures. These effects result from enhanced vertical mixing due to turbulence generated by wind turbine rotors. The impacts of wind farms on local weather can be minimized by changing rotor design or by siting wind farms in regions with high natural turbulence. Using a 25-y-long climate dataset, we . . . Complete article »

Zhou, Liming; Tian, Yuhong; Baidya Roy, Somnath; Dai, Yongjiu; and Chen, Haishan
Diurnal and seasonal variations of wind farm impacts on land surface temperature over western Texas 
Abstract: This paper analyzes seasonal and diurnal variations of MODerate resolution Imaging Spectroradiometer (MODIS) land surface temperature (LST) data at ~1.1 km for the period of 2003–2011 over a region in West-Central Texas, where four of the world’s largest wind farms are located. Seasonal anomalies are created from MODIS Terra (~10:30 a.m. and 10:30 p.m. local solar time) and Aqua (~1:30 a.m. and 1:30 p.m. local solar time) LSTs, and their spatiotemporal variability is analyzed by comparing the LST changes . . . Complete article »

Zhou, Liming; Tian, Yuhong; Baidya Roy, Somnath; Thorncroft, Chris; Bosart, Lance; and Hu, Yuanlong
Impacts of wind farms on land surface temperature 
[abstract] The wind industry in the United States has experienced a remarkably rapid expansion of capacity in recent years and this fast growth is expected to continue in the future. While converting wind’s kinetic energy into electricity, wind turbines modify surface–atmosphere exchanges and the transfer of energy, momentum, mass and moisture within the atmosphere. These changes, if spatially large enough, may have noticeable impacts on local to regional weather and climate. Here we present observational evidence for such impacts based . . . Complete article »

Baidya Roy, Somnath; Pacala, Stephen; and Walko, R.L.
Can large wind farms affect local meteorology? 
Abstract: The RAMS model was used to explore the possible impacts of a large wind farm in the Great Plains region on the local meteorology over synoptic timescales under typical summertime conditions. A wind turbine was approximated as a sink of energy and source of turbulence. The wind farm was created by assuming an array of such turbines. Results show that the wind farm significantly slows down the wind at the turbine hub-height level. Additionally, turbulence generated by rotors create . . . Complete article »

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