气候变化领域集成服务门户(CCPortal): An 18-Year Climatology of Directional Stratospheric Gravity Wave Momentum Flux From 3-D Satellite Observations

CCPortal

DOI	10.1029/2020GL089557
	An 18-Year Climatology of Directional Stratospheric Gravity Wave Momentum Flux From 3-D Satellite Observations
	Hindley N.P.; Wright C.J.; Hoffmann L.; Moffat-Griffin T.; Mitchell N.J.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:22
英文摘要	Atmospheric gravity waves (GWs) are key drivers of the atmospheric circulation, but their representation in general circulation models (GCMs) is challenging, leading to significant biases in middle atmospheric circulations. Unresolved GW momentum transport in GCMs must be parameterized, but global directional GW observations are needed to constrain this. Here we present an 18-year climatology of directional stratospheric GW momentum flux (GWMF) from global AIRS/Aqua 3-D satellite observations during 2002 to 2019. Striking hemispheric asymmetries are found at high latitudes, including dramatic reductions and reversals of GWMF during sudden stratospheric warmings. During Southern Hemisphere winter, a lateral convergence of GWMF toward 60°S is found that has no Northern Hemisphere counterpart. In the tropics, we find that zonal GWMF in AIRS measurements is strongly modulated by the semiannual oscillation (SAO) but not the quasi-biennial oscillation (QBO). Our results provide guidance for future GW parameterizations needed to resolve long-standing biases in GCMs. ©2020. The Authors.
英文关键词	Climatology; Gravity waves; Infrared devices; Atmospheric circulation; Atmospheric gravity waves; General circulation model; Hemi-spheric asymmetries; Middle atmospheric circulations; Quasi-biennial oscillation; Satellite observations; Semiannual oscillations; Momentum; AIRS; climatology; gravity wave; Northern Hemisphere; observational method; quasi-biennial oscillation; semiannual oscillation; Southern Hemisphere; stratosphere; three-dimensional modeling
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169455
作者单位	Centre for Space, Atmospheric and Oceanic Science, University of Bath, Bath, United Kingdom; Jülich Supercomputing Centre, Forschungszentrum Jülich, Jülich, Germany; Atmosphere, Ice and Climate Group, British Antarctic Survey, Cambridge, United Kingdom
推荐引用方式 GB/T 7714	Hindley N.P.,Wright C.J.,Hoffmann L.,et al. An 18-Year Climatology of Directional Stratospheric Gravity Wave Momentum Flux From 3-D Satellite Observations[J],2020,47(22).
APA	Hindley N.P.,Wright C.J.,Hoffmann L.,Moffat-Griffin T.,&Mitchell N.J..(2020).An 18-Year Climatology of Directional Stratospheric Gravity Wave Momentum Flux From 3-D Satellite Observations.Geophysical Research Letters,47(22).
MLA	Hindley N.P.,et al."An 18-Year Climatology of Directional Stratospheric Gravity Wave Momentum Flux From 3-D Satellite Observations".Geophysical Research Letters 47.22(2020).