DOI: 10.1002/2016JD025297
论文题名: Toward understanding the physical link between turbines and microclimate impacts from in situ measurements in a large wind farm
作者: Rajewski D.A. ; Takle E.S. ; Prueger J.H. ; Doorenbos R.K.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期: 22 起始页码: 392
结束页码: 414
语种: 英语
英文关键词: data composites
; eddy covariance systems
; satellite analysis
; Super Control Advisory Data and Acquisition (SCADA)
; surface stratification
; wind farm
Scopus关键词: cooling
; data acquisition
; eddy covariance
; in situ measurement
; microclimate
; MODIS
; satellite altimetry
; stratification
; surface flux
; surface temperature
; turbulence
; wind farm
; wind turbine
英文摘要: Recent wind farm studies have revealed elevated nighttime surface temperatures but have not validated physical mechanisms that create the observed effects. We report measurements of concurrent differences in surface wind speed, temperature, fluxes, and turbulence upwind and downwind of two turbine lines at the windward edge of a utility-scale wind farm. On the basis of these measurements, we offer a conceptual model based on physical mechanisms of how wind farms affect their own microclimate. Periods of documented curtailment and zero-power production of the wind farm offer useful opportunities to rigorously evaluate the microclimate impact of both stationary and operating turbines. During an 80 min nighttime wind farm curtailment, we measured abrupt and large changes in turbulent fluxes of momentum and heat leeward of the turbines. At night, wind speed decreases in the near wake when turbines are off but abruptly increases when turbine operation is resumed. Our measurements are compared with Moderate Resolution Imaging Spectroradiometer Terra and Aqua satellite measurements reporting wind farms to have higher nighttime surface temperatures. We demonstrate that turbine wakes modify surface fluxes continuously through the night, with similar magnitudes during the Terra and Aqua transit periods. Cooling occurs in the near wake and warming in the far wake when turbines are on, but cooling is negligible when turbines are off. Wind speed and surface stratification have a regulating effect of enhancing or decreasing the impact on surface microclimate due to turbine wake effects. ©2016. The Authors. 资助项目: 1063048
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62785
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Agronomy, Iowa State University, Ames, IA, United States; National Laboratory for Agriculture and the Environment, Ames, IA, United States
Recommended Citation:
Rajewski D.A.,Takle E.S.,Prueger J.H.,et al. Toward understanding the physical link between turbines and microclimate impacts from in situ measurements in a large wind farm[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(22)