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首页> 外文期刊>Boundary-layer Meteorology >Investigation of Spatial and Temporal Wind-Speed Variability During Open Cellular Convection with the Model for Prediction Across Scales in Comparison with Measurements
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Investigation of Spatial and Temporal Wind-Speed Variability During Open Cellular Convection with the Model for Prediction Across Scales in Comparison with Measurements

机译：与测量相比，横跨尺度预测的开放槽对流期间空间和时间风速变异性研究

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摘要

Open cellular convection (OCC) over, for example, the North Sea is often observed in connection with cold-air outbreaks. It is accompanied by large temporal and spatial variability in wind speed, which affects offshore wind energy in the area. This study uses the global Model for Prediction Across Scales (MPAS), with regional mesh refinement down to convection-permitting scales of 2 km, to simulate an OCC episode in the North Sea, with a focus on wind-speed variability. Modelled data are combined with wind speeds retrieved from satellite data and in situ measurements to investigate the spatial and temporal variability of offshore wind speeds under OCC conditions from a synoptic to mesoscale perspective, and to examine the model's ability to represent the OCC structures and wind-speed variability. The model can simulate realistic OCC structures and mesoscale wind-speed variability within the limits set by the effective model resolution. Under OCC conditions, significant differences from climatological conditions are found in the spatial wind-speed power spectrum and in 10-min wind-speed step changes. The very high horizontal mesh-cell spacing in the refinement region of 2 km, and the focus on OCC wind-speed variability, makes this the first investigation of this kind using the MPAS modelling framework with mesh refinement.
机译：例如，开放蜂窝对流（OCC）经常与冷空气爆发有关北海。它伴随着风速的大型时间和空间变异，这影响了该地区的海上风能。本研究使用全球模型进行尺度（MPA）的预测，区域网格细化到2公里的对流允许的尺度，以模拟北海的OCC集，重点是风速变化。建模数据与从卫星数据检索的风速和原位测量相结合，以研究从SYNOPTIC到Mescreale角度的OCCHORE风速下的海上风速的空间和时间可变性，并检查模型代表OCC结构和风的能力 - 速度变化。该模型可以在有效模型分辨率设定的限制范围内模拟实际OCC结构和Mescle风速变化。在单独的条件下，在空间风速功率谱和10分钟的风速步骤变化中发现了与气候条件的显着差异。在2km的细化区域中非常高的水平网状电池间距，并专注于OCC风速变化，首先使用与网眼细化的MPAS建模框架进行这种类型的研究。

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