Dual doppler radar observations of clear air wind perturbations in the planetary boundary layer

1979 ◽  
Vol 84 (C2) ◽  
pp. 697 ◽  
Author(s):  
Richard J. Doviak ◽  
Charles T. Jobson
Keyword(s):  
Boundary Layer ◽  
Planetary Boundary Layer ◽  
Doppler Radar ◽  
Radar Observations ◽  
Dual Doppler Radar

scholarly journals Dual-Doppler Radar Observations on Factors Causing Differences in the Structure of Snow Clouds during Winter Monsoon Surges

2004 ◽  
Vol 82 (1) ◽  
pp. 179-206 ◽  
Author(s):  
Hiroyuki YAMADA ◽  
Hiroshi UYEDA ◽  
Katsuhiro KIKUCHI ◽  
Masayuki MAKI ◽  
Koyuru IWANAMI
Keyword(s):  
Doppler Radar ◽  
Winter Monsoon ◽  
Radar Observations ◽  
Dual Doppler Radar

scholarly journals On the Use of Dual-Doppler Radar Measurements for Very Short-Term Wind Power Forecasts

2018 ◽  
Vol 10 (11) ◽  
pp. 1701 ◽  
Author(s):  
Laura Valldecabres ◽  
Nicolai Nygaard ◽  
Luis Vera-Tudela ◽  
Lueder von Bremen ◽  
Martin Kühn
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
Wind Power ◽  
Electricity Market ◽  
Doppler Radar ◽  
Short Term ◽  
Radar Observations ◽  
Spatial Coverage ◽  
Probabilistic Forecasts ◽  
Dual Doppler Radar

Very short-term forecasts of wind power provide electricity market participants with extremely valuable information, especially in power systems with high penetration of wind energy. In very short-term horizons, statistical methods based on historical data are frequently used. This paper explores the use of dual-Doppler radar observations of wind speed and direction to derive five-minute ahead deterministic and probabilistic forecasts of wind power. An advection-based technique is introduced, which estimates the predictive densities of wind speed at the target wind turbine. In a case study, the proposed methodology is used to forecast the power generated by seven turbines in the North Sea with a temporal resolution of one minute. The radar-based forecast outperforms the persistence and climatology benchmarks in terms of overall forecasting skill. Results indicate that when a large spatial coverage of the inflow of the wind turbine is available, the proposed methodology is also able to generate reliable density forecasts. Future perspectives on the application of Doppler radar observations for very short-term wind power forecasting are discussed in this paper.

scholarly journals The vorticity budget of developing typhoon Nuri (2008)

2011 ◽  
Vol 11 (1) ◽  
pp. 147-163 ◽  
Author(s):  
D. J. Raymond ◽  
C. López Carrillo
Keyword(s):  
Boundary Layer ◽  
Planetary Boundary Layer ◽  
Doppler Radar ◽  
Strong Increase ◽  
Easterly Wave ◽  
Vorticity Budget ◽  
Deep Region ◽  
Low Levels ◽  
Tropical Wave ◽  
Strong Vorticity

Abstract. The formation of west Pacific tropical cyclone Nuri (2008) was observed over four days from easterly wave to typhoon stage by aircraft using scanning Doppler radar and dropsonde data. This disturbance developed rapidly in a significantly sheared environment. In spite of the shear, overlapping closed circulations existed in the frame of reference of the storm in the planetary boundary layer and at 5 km elevation, providing a deep region protected from environmental influences. The rapid spinup of Nuri can be attributed to the strong increase with height at low levels of the vertical mass flux during and after the tropical depression stage, and the correspondingly strong vorticity convergence in the planetary boundary layer. As Nuri developed, convective regions of boundary layer vortex stretching became fewer but more intense, culminating in a single nascent eyewall at the tropical storm stage. A non-developing tropical wave case was also analyzed. This system started with much weaker circulations in the boundary layer and aloft, leaving it unprotected against environmental intrusion. This may explain its failure to develop.

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