Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD026471 |
Gravity wave spectra in the lower stratosphere diagnosed from project loon balloon trajectories | |
Schoeberl, M. R.1; Jensen, E.2; Podglajen, A.3,4; Coy, L.5,6; Lodha, C.7; Candido, S.7; Carver, R.7 | |
2017-08-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:16 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; France |
英文摘要 | Project Loon has been launching superpressure balloons since January 2013 to provide worldwide Internet coverage. These balloons typically fly between 18 and 21 km and provide measurements of winds and pressure fluctuations in the lower stratosphere. We divide 1560 Loon flights into 3405 two-day segments for gravity wave analysis. We derive the kinetic energy spectrum from the horizontal balloon motion and estimate the temperature perturbation spectrum (proportional to the potential energy spectrum) from the pressure variations. We fit the temperature (and kinetic energy) data to the functional form T'(2) = T-o'(2)[omega/omega(0))(alpha), where omega is the wave frequency, omega(o) is daily frequency, T-o' is the base temperature amplitude, and a is the spectral slope. Both the kinetic energy and temperature spectra show -1.9 +/- 0.2 power-law dependence in the intrinsic frequency window 3-50 cycles/day. The temperature spectrum slope is weakly anticorrelated with the base temperature amplitude. We also find that the wave base temperature distribution is highly skewed. The tropical modal temperature is 0.77 K. The highest amplitude waves occur over the mountainous regions, the tropics, and the high southern latitudes. Temperature amplitudes show little height variation over our 18-21 km domain. Our results are consistent with other limited superpressure balloon analyses. The modal temperature is higher than the temperature currently used in high-frequency gravity wave parameterizations. Plain Language Summary Using Project Loon balloon trajectories, we present new observations of the lower stratospheric gravity wave spectra. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000416382800009 |
WOS关键词 | HOMOGENEOUS ICE NUCLEATION ; TROPICAL TROPOPAUSE LAYER ; TEMPERATURE-FLUCTUATIONS ; MOMENTUM FLUX ; PHASE SPEEDS ; MODEL ; SIMULATIONS ; VARIABILITY ; ANTARCTICA ; FLIGHTS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/33254 |
专题 | 气候变化 |
作者单位 | 1.Sci & Technol Corp, Columbia, MD 21046 USA; 2.NASA, Ames Res Ctr, Moffett Field, CA 94035 USA; 3.Univ Paris 06, Inst Pierre Simon Laplace, Ecole Normale Super, Ecole Polytech,Lab Meteorol Dynam,CNRS,UMR8539, Paris, France; 4.Univ Paris 06, CNRS, UPMC, Lab Meteorol Dynam IPSL, Palaiseau, France; 5.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA; 6.SSAI, Lanham, MD USA; 7.Project Loon X, Mountain View, CA USA |
推荐引用方式 GB/T 7714 | Schoeberl, M. R.,Jensen, E.,Podglajen, A.,et al. Gravity wave spectra in the lower stratosphere diagnosed from project loon balloon trajectories[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(16). |
APA | Schoeberl, M. R..,Jensen, E..,Podglajen, A..,Coy, L..,Lodha, C..,...&Carver, R..(2017).Gravity wave spectra in the lower stratosphere diagnosed from project loon balloon trajectories.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(16). |
MLA | Schoeberl, M. R.,et al."Gravity wave spectra in the lower stratosphere diagnosed from project loon balloon trajectories".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.16(2017). |
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