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水平速度扰动场在大波数区的各向异性 被引量:1

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摘要 利用 MAC/SINE试验期间 Chaff火箭在67~96km高度范围测量的25m高分辨率经向和纬向速度数据,研究经向和纬向速度扰动谱特性。分析结果显示平均垂直波数谱在波数k=0.001m-1附近有一分岔点。在小于这个分岔点的波数区,经向速度谱和纬向速度谱有接近相同的谱斜率、谱振幅和特征垂直波长,并且与线性饱和谱模式相当一致。然而,在大于这个分岔点的波数区,经向和纬向速度扰动谱不但谱斜率和谱振幅不一样,而且它们的谱结构也不相同。这些差异提供了平均意义上速度扰动场在大波数区各向异性的观测证据。
出处 《中国科学(D辑)》 CSCD 北大核心 2002年第6期452-456,共5页 Science in China(Series D)
基金 国家自然科学基金资助项目(批准号:49974038 49990450) 国家重点基础研究发展规划项目(编号:G2000078407)
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同被引文献10

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