NSSC OpenIR  > 空间科学部
冬季中层顶区域重力波谱特性
Alternative TitleCHARACTERISTICS OF GRAVITY WAVE SPECTRUM IN THE WINTER MESOPAUSE REGION
吴永富; 徐寄遥; 北京8701信箱
Department空间天气学国家重点实验室
Source Publication空间科学学报
2004
Volume24Issue:5Pages:333-339
ISSN0254-6124
Language中文
Keyword水平速度 饱和重力波谱 饱和理论 盛行垂直波长 大气扰动谱
Abstract使用DYANA试验期间19枚Chaff火箭在81-105km高度范围测量的高分辨率水平速度数据,研究标量水平速度垂直波数谱在冬季的谱特性.分析结果显示冬季平均垂直波数谱有-3.02的谱斜率,这与各种饱和理论预测的-3谱斜率很一致,提供了饱和重力波谱在冬季的观测证据.与各种饱和理论比较表明,这个冬季谱的谱振幅与线性饱和理论预测的谱振幅完全一致,但是总是小于非线性饱和理论预期的,激光雷达测量的谱振幅.这个冬季谱与最近得到的夏季饱和重力波谱一道,共同表明我们的观测结果支持了线性饱和理论,而不管季节,地理位置和高度范围的不同.由这个冬季谱估计的盛行垂直波长为15km,它比夏季的12.8km盛行垂直波长稍大.
Other AbstractThis paper utilizes horizontal velocity data with high resolution measured by 19 chaff rockets in the 80~-105 km region during the DYANA campaign to study char-acteristics of vertical wavenumber spectrum of scalar horizontal velocity in winter.Results show that the mean vertical wavenumber spectrum in winter has a spec-tral slope of-3.02, which is quite consistent with the-3 spectral slope predicted by various saturation theories,therefore,this provides an observational evidence of a saturated gravity wave spectrum in winter.Comparison with various satu-ration theories shows that spectral amplitude of the winter spectrum is perfectly consistent with that spectral amplitude predicted by the linear saturation theory,but it is always lower than those spectral amplitudes predicated by the nonlinear saturation theories and measured by lidars.The winter spectrum,together with a saturated gravity wave spectrum in the polar summer obtained recently, shows collectively that our observational results support the linear saturation theory re-gardless of different seasons, different geographical locations,and different height regions.Dominant vertical wavelength of the winter spectrum is estimated to be 15 km, which is slightly larger than the dominant vertical wavelength of 12.8 km measured in summer.
Indexed ByCSCD
Funding Project中国科学院空间科学与应用研究中心
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1359
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
吴永富,徐寄遥,北京8701信箱. 冬季中层顶区域重力波谱特性[J]. 空间科学学报,2004,24(5):333-339.
APA 吴永富,徐寄遥,&北京8701信箱.(2004).冬季中层顶区域重力波谱特性.空间科学学报,24(5),333-339.
MLA 吴永富,et al."冬季中层顶区域重力波谱特性".空间科学学报 24.5(2004):333-339.
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