The variability of the northern westerlies has been considered as one of the key elements for modern and past climate evolution. Their multiscale behavior and underlying control mechanisms, however, are incompletely understood, owing to the complex dynam
Each of the three models was tested with approach wind directions from 0° to 90°, in 15° increments. It was observed that speed-up can vary significantly depending on the approaching wind direction. The effect of wind direction on speed-up was also investigated using field data from a ...
This investigation was conducted at theLow TurbulenceWind Tunnelof the Naval SurfaceWarfareCenter in Carderock, MD (USA). The tunnel is 1.2m high by 0.6m wide and can reach maximumwind velocitiesof approximately 43m/s. As shown infig. 1, a 0.9m long test cylinder of 50mm diameter was mou...
1a–c). Figure 1a depicts wind rose and the distributions of sand-flux directions. Due to limited sediment supply and unidirectional flows, numerous barchan dunes have formed and migrated at high speed. These highly favorable conditions in the field make it a perfect region for our study. ...
In the natural world, the directions and speeds of the wind change rapidly depending on the seasons, locations, time periods and atmospheric motion. This is a quite complex phenomenon, leading to the difficulties in the long-term predictions of the wind power. Fig. 3 shows an example of the...
(3) Vegetation prevents expansion of the blowout in certain directions and impediments to flow, such as slump blocks, alter circulation patterns and sand transport paths. (4) Prevailing onshore winds deflate the floor and promote eastward expansion of lateral erosional lobes, whereas strong flows ...
He et al. [2005] developed a new gradient method model (GM), which can retrieve wind directions from SAR images without trying to infer slicks. However, thus far, this method can only be used in relatively uniform wind field situations. In this paper, two modifications to the GM method ...
Then, the WDS of the city is defined by the four wind directions θNE,θNW,θSW, and θSE in the cells. Whenever the value of wind direction is expressed in terms of the 8-sectors scale (N, NE, E, SE, S, SW, W, NW), the WDS allows a very simple but illustrative pictorial ...
variety of methods were made, including (1) general wind circulation information from maps of air pressure; (2) two radar seats in different locations, which help find the wind direction estimation with the smallest error [7]; and (3) one radar switching between radio beam directions [10,27...
The USA, however, remains a dominant force. In a huge signal of industry confidence, in January this year Dominion Energy unveiled expansion plans for its proposed 12 MW Coastal Virginia Offshore Wind (CVOW) pilot project, which at 2.64 GW will become the world’s largest ever offshore ...