气候变化领域集成服务门户(CCPortal): Seasonal and Latitudinal Variability of the Gravity Wave Spectrum in the Lower Stratosphere

CCPortal

DOI	10.1029/2020JD032850
	Seasonal and Latitudinal Variability of the Gravity Wave Spectrum in the Lower Stratosphere
	Lindgren E.A.; Sheshadri A.; Podglajen A.; Carver R.W.
发表日期	2020
ISSN	2169897X
卷号	125 期号:18
英文摘要	Superpressure balloon data of unprecedented coverage from Loon LLC is used to investigate the seasonal and latitudinal variability of lower stratospheric gravity waves over the entire intrinsic frequency spectrum. We show that seasonal variability in both gravity wave amplitudes and spectral slopes exist for a wide range of intrinsic frequencies and provide estimates of spectral slopes in five latitudinal regions for all four seasons, in five different frequency windows. The spectral slopes can be used to infer gravity wave amplitudes of intrinsic frequencies as high as 70 cycles/day from gravity waves resolved in model and reanalysis data. We also show that a robust relationship between the phase of the quasi-biennial oscillation and gravity wave amplitudes exists for intrinsic frequencies as high as the buoyancy frequency. These are the first estimates of seasonal and latitudinal variability of gravity wave spectral slopes and high-frequency amplitudes and constitute a significant step toward obtaining observationally constrained gravity wave parameterizations in climate models. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	gravity waves; high-frequency gravity waves; spectral slopes; superpressure balloons
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185754
作者单位	Swiss Re, Armonk, NY, United States; Department of Earth System Science, Stanford University, Stanford, CA, United States; Laboratoire de Météorologie Dynamique, UMR 8539, CNRS/PSL-ENS/Sorbonne Université/Ecole Polytechnique, Paris, France; Loon LLC, Mountain View, CA, United States
推荐引用方式 GB/T 7714	Lindgren E.A.,Sheshadri A.,Podglajen A.,et al. Seasonal and Latitudinal Variability of the Gravity Wave Spectrum in the Lower Stratosphere[J],2020,125(18).
APA	Lindgren E.A.,Sheshadri A.,Podglajen A.,&Carver R.W..(2020).Seasonal and Latitudinal Variability of the Gravity Wave Spectrum in the Lower Stratosphere.Journal of Geophysical Research: Atmospheres,125(18).
MLA	Lindgren E.A.,et al."Seasonal and Latitudinal Variability of the Gravity Wave Spectrum in the Lower Stratosphere".Journal of Geophysical Research: Atmospheres 125.18(2020).