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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Horizontal wavenumber spectra of winds, temperature, and trace gases during the Pacific Exploratory Missions: 1. Climatology
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Horizontal wavenumber spectra of winds, temperature, and trace gases during the Pacific Exploratory Missions: 1. Climatology

机译：太平洋探索任务期间风，温度和微量气体的水平波数谱：1.气候学

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Aircraft-based meteorological and chemical measurements from NASA's Pacific Exploratory Missions provide a suitable database for studying the climatology of horizontal wavenumber spectra in the troposphere overlying an ocean. The wavenumber spectra of trace gas and meteorological quantities aid in identifying the physical processes producing atmospheric structures as well as provide diagnostics for general circulation models. Flight segments were distributed over altitudes ranging from about approx 50 m to 13 km and 70 deg S to 60 deg N in latitude. The spectra were averaged according to altitude and latitude regions. The wavelength range covered was typically approx 0.5-100 km. Quantities processed in this way were horizontal velocity, potential temperature, specific humidity, and the mixing ratios of ozone, methane, carbon monoxide, and carbon dioxide. Spectral power and slope (in log-log coordinates) corresponding to the wavelength regime of 6-60 km were tabulated for those measured quantities. The spectral slopes of horizontal velocity and potential temperature were generally close to -5/3 with no transition to a steeper slope at short wavelengths as seen in some other studies. Spectral slopes of the tracer species also ranged around -5/3. This agreement in form of the dynamical and tracer spectra is consistent with both the gravity-wave advection and quasi two-dimensional turbulence models. In the upper troposphere the spectral power for all quantities except specific humidity tended to be greater at latitudes higher than 30 deg compared to latitudes lower than 30 deg. This latitudinal trend confirms the earlier results of the Global Atmospheric Sampling Program.
机译：NASA的太平洋探索团提供的基于飞机的气象和化学测量结果为研究覆盖在海洋上的对流层中水平波数谱的气候学提供了一个合适的数据库。痕量气体的波谱和气象量有助于识别产生大气结构的物理过程，并为一般的循环模型提供诊断。飞行段分布在大约50 m至13 km的纬度和南纬70度至北纬60度的高度上。根据海拔和纬度区域对光谱进行平均。覆盖的波长范围通常约为0.5-100 km。以这种方式处理的数量是水平速度，势能温度，比湿度以及臭氧，甲烷，一氧化碳和二氧化碳的混合比。对于那些测量量，将对应于6-60 km波长范围的光谱功率和斜率（以对数-对数坐标表示）制成表格。如在其他一些研究中所见，水平速度和潜在温度的光谱斜率通常接近-5/3，并且在短波长下没有过渡到陡峭的斜率。示踪物种类的光谱斜率也在-5/3左右。动力学和示踪谱形式的这种一致与重力波对流和准二维湍流模型都一致。在高对流层中，除比湿度外，所有量的光谱功率在高于30度的纬度上都比低于30度的纬度大。这种纬度趋势证实了全球大气采样计划的早期结果。

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