...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Atmospheric Measurement Techniques >Multi-instrument gravity-wave measurements over Tierra del Fuego and the Drake Passage - Part 1: Potential energies and vertical wavelengths from AIRS, COSMIC, HIRDLS, MLS-Aura, SAAMER, SABER and radiosondes
【24h】

Multi-instrument gravity-wave measurements over Tierra del Fuego and the Drake Passage - Part 1: Potential energies and vertical wavelengths from AIRS, COSMIC, HIRDLS, MLS-Aura, SAAMER, SABER and radiosondes

机译：火地岛和德雷克海峡上的多仪器重力波测量-第1部分：来自AIRS，COSMIC，HIRDLS，MLS-Aura，SAAMER，SABER和无线电探空仪的势能和垂直波长

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Gravity waves in the terrestrial atmosphere are a vital geophysical process, acting to transport energy and momentum on a wide range of scales and to couple the various atmospheric layers. Despite the importance of these waves, the many studies to date have often exhibited very dissimilar results, and it remains unclear whether these differences are primarily instrumental or methodological. Here, we address this problem by comparing observations made by a diverse range of the most widely used gravity-wave-resolving instruments in a common geographic region around the southern Andes and Drake Passage, an area known to exhibit strong wave activity. Specifically, we use data from three limb-sounding radiometers (Microwave Limb Sounder, MLS-Aura; HIgh Resolution Dynamics Limb Sounder, HIRDLS; Sounding of the Atmosphere using Broadband Emission Radiometry, SABER), the Constellation Observing System for Meteorology, Ionosphere and Climate (COSMIC) GPS-RO constellation, a ground-based meteor radar, the Advanced Infrared Sounder (AIRS) infrared nadir sounder and radiosondes to examine the gravity wave potential energy (GWPE) and vertical wavelengths (lambda(z)) of individual gravity-wave packets from the lower troposphere to the edge of the lower thermosphere (similar to 100 km). Our results show important similarities and differences. Limb sounder measurements show high intercorrelation, typically >0.80 between any instrument pair. Meteor radar observations agree in form with the limb sounders, despite vast technical differences. AIRS and radiosonde observations tend to be uncorrelated or anticorrelated with the other data sets, suggesting very different behaviour of the wave field in the different spectral regimes accessed by each instrument. Evidence of wave dissipation is seen, and varies strongly with season. Observed GWPE for individual wave packets exhibits a log-normal distribution, with short-timescale intermittency dominating over a well-repeated monthly-median seasonal cycle. GWPE and lambda(z) exhibit strong correlations with the stratospheric winds, but not with local surface winds. Our results provide guidance for interpretation and intercomparison of such data sets in their full context.
机译：地球大气中的重力波是至关重要的地球物理过程，其作用是在广泛的尺度上传输能量和动量，并耦合各个大气层。尽管这些浪潮很重要，但迄今为止，许多研究通常显示出非常不同的结果，并且尚不清楚这些差异主要是工具性的还是方法性的。在这里，我们通过比较在安第斯山脉南部和德雷克海峡（一个已知表现出强波活动性的地区）周围的共同地理区域中最广泛使用的重力波分辨仪器的各种观测结果来解决此问题。具体来说，我们使用来自三个肢体声音辐射计（微波肢体测深仪，MLS-Aura;高解析度动力学肢体测深仪，HIRDLS;使用宽带发射辐射测量的大气探测，SABRE），气象，电离层和气候星座观测系统的数据（COSMIC）GPS-RO星座，地面流星雷达，高级红外测深仪（AIRS）红外天底测深仪和无线电探空仪，以检查各个重力场的重力波势能（GWPE）和垂直波长（lambda（z）），从对流层下部到热圈下部边缘的波包（大约100公里）。我们的结果显示出重要的异同。肢体发声器的测量结果显示出很高的互相关性，通常在任何一对乐器之间> 0.80。尽管存在巨大的技术差异，但流星雷达的观测结果在形式上与肢体测深仪一致。 AIRS和探空仪观测值往往与其他数据集不相关或反相关，这表明在每种仪器所使用的不同频谱范围内，波场的行为都非常不同。可以看到波浪消散的证据，并且随季节变化很大。观察到的单个波浪数据包的GWPE表现出对数正态分布，而短时间隔的间歇性在重复良好的每月中位数季节性周期中占主导地位。 GWPE和lambda（z）与平流层风表现出很强的相关性，但与当地地面风却没有相关性。我们的结果为此类数据集的完整解释和相互比较提供了指导。

著录项

相似文献

  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号