Campus Units

Agronomy

Document Type

Article

Publication Version

Published Version

Publication Date

3-28-2020

Journal or Book Title

Geophysical Research Letters

Volume

47

Issue

6

First Page

e2019GL086010

DOI

10.1029/2019GL086010

Abstract

Single wind turbines and large wind farms modify local scales of atmospheric boundary layer (ABL) turbulence through different mechanisms dependent on location within the wind farm. These changes in turbulence scales would most likely have notable influence on surface fluxes and microclimate during the afternoon and early evening stability transition. Profiles of Richardson number and shear and buoyancy from 1‐Hz tall tower measurements in and near a wind farm in an agricultural landscape were used to quantify departures in stability characteristics during the fallow seasons. A single turbine wake decoupled turbulent connection between the surface and above the wind turbine, changed the onset of near‐surface stabilization (earlier by a few hours), and lengthened the transition period (by up to an hour) within the rotor wake. Deep within a large wind farm, turbulence recovered to near‐ambient conditions and departures of the transition onset and duration were within 30 min of the natural ABL.

Comments

This article is published as Rajewski, D. A., E. S. Takle, A. VanLoocke, and S. L. Purdy. "Observations show that wind farms substantially modify the atmospheric boundary layer thermal stratification transition in the early evening." Geophysical Research Letters 47 (2020): e2019GL086010. doi: 10.1029/2019GL086010.

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

Copyright Owner

The Authors

Language

en

File Format

application/pdf

Share

COinS