Investigation of a Complex Nocturnal Flow in Owens Valley, California Using Coherent Doppler Lidar
Investigation of a Complex Nocturnal Flow in Owens Valley, California Using Coherent Doppler Lidar
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使用相干多普勒激光雷达调查加利福尼亚州欧文斯谷的复杂夜间气流
DOI：
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发表时间：
2012
影响因子：
4.3
通讯作者：
J. Doyle
中科院分区：
文献类型：
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作者：
A. Choukulkar;R. Calhoun;B. Billings;J. Doyle
利用一种新的统计插值方法，对美国加州欧文斯谷的一次地形诱导旋翼试验中的气象事件进行了研究。这种矢量反演方法是从雷达资料同化技术中改编而来的。结果表明，该方法可以更好地保存局部变化的流场比其他技术。此外，高分辨率耦合海洋/大气中尺度预报系统（COAMPS®）运行用于了解山谷内的大尺度流动，并与激光雷达检索进行比较。给出了2006年3月27日1030 UTC至1230 UTC（当地时间0230至0430）的观测结果。激光雷达观测显示出复杂和不典型的流动，如西风横谷风与占主导地位的上谷风混合的突然爆发。COAMPS和其他现场仪器的模型结果被用来证实和补充这些意见。多普勒激光雷达数据矢量反演的最佳插值技术似乎非常适合于流场中具有复杂空间变化的场景。
A study of an interesting meteorological episode over the Owens Valley, California, USA during the Terrain-Induced Rotor EXperiment was conducted using a recently adapted statistical interpolation method to retrieve wind-velocity vectors from Doppler lidar data. This vector retrieval method has been adapted from radar data assimilation techniques. Results show that the method allows better preservation of local variations in the flow field than other techniques. In addition, a high resolution Coupled Ocean/Atmosphere Mesoscale Prediction System (COAMPS®) run is used to understand the large-scale flow within the valley and compared with lidar retrievals. Observations from 1030 UTC to 1230 UTC (0230 local time to 0430 local time) on March 27, 2006 are presented. Lidar observations show complex and uncharacteristic flows such as sudden bursts of westerly cross-valley wind mixing with the dominant up-valley wind. Model results from COAMPS and other in-situ instrumentation are used to corroborate and complement these observations. The optimal interpolation technique for Doppler lidar data vector retrieval appears well suited for scenarios with complex spatial variations in the flow field.