气候变化领域集成服务门户(CCPortal): Climatological Westward-Propagating Semidiurnal Tides and Their Composite Response to Sudden Stratospheric Warmings in SuperDARN and SD-WACCM-X

CCPortal

DOI	10.1029/2020JD032895
	Climatological Westward-Propagating Semidiurnal Tides and Their Composite Response to Sudden Stratospheric Warmings in SuperDARN and SD-WACCM-X
	Zhang J.; Limpasuvan V.; Orsolini Y.J.; Espy P.J.; Hibbins R.E.
发表日期	2021
ISSN	2169897X
卷号	126 期号:3
英文摘要	Using the Super Dual Auroral Radar Network observations (clustered around 60°N) and NCAR CESM2.0 extended Whole Atmosphere Community Climate Model nudged with reanalyzes, we examine the climatology of semidiurnal tides in meridional wind associated with the migrating component (SW2) and non-migrating components of wavenumbers 1 (SW1) and 3 (SW3). We then illustrate their composite response to major sudden stratospheric warmings (SSWs). Peaking in late summer and winter, the climatological SW2 amplitude exceeds SW1 and SW3 except around late Fall and Spring. The winter climatological peak is absent in the model perhaps due to the zonal wind bias at the observed altitudes. The observed SW2 amplitude declines after SSW onset before enhancing ∼10 days later, along with SW1 and SW3. Within the observed region, the simulated SW2 only amplifies after SSW onset, with minimal SW1 and SW3 responses. The model reveals a stronger SW2 response above the observed location, with diminished amplitude before and enhancement after SSW globally. This enhancement appears related to increased equatorial ozone heating and background wind symmetry. The strongest SW1 and SW3 growth occurs in the Southern Hemisphere before SSW. SW2 and quasi-stationary planetary wave activities are temporally collocated during SSW suggesting that their interactions excite SW1 and SW3. After SSW, the model also reveals (1) semidiurnal-tide-like perturbations generated possibly by the interactions between SW2 and westward-traveling disturbances and (2) the enhancement of migrating semidiurnal lunar tide in the Northern Hemisphere that exceeds non-migrating tidal and semidiurnal-tide-like responses. The simulated eastward-propagating semidiurnal tides are briefly examined. © 2021. The Authors.
英文关键词	atmospheric tides; middle atmosphere; MLT dynamics; sudden stratospheric warming; superDARN; WACCMX
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/185521
作者单位	Department of Marine Science, Coastal Carolina UniversitySC, United States; Norwegian Institute of Air Research, Kjeller, Norway; Norwegian University of Science and Technology, Trondheim, Norway; Birkeland Centre for Space Science, Bergen, Norway
推荐引用方式 GB/T 7714	Zhang J.,Limpasuvan V.,Orsolini Y.J.,et al. Climatological Westward-Propagating Semidiurnal Tides and Their Composite Response to Sudden Stratospheric Warmings in SuperDARN and SD-WACCM-X[J],2021,126(3).
APA	Zhang J.,Limpasuvan V.,Orsolini Y.J.,Espy P.J.,&Hibbins R.E..(2021).Climatological Westward-Propagating Semidiurnal Tides and Their Composite Response to Sudden Stratospheric Warmings in SuperDARN and SD-WACCM-X.Journal of Geophysical Research: Atmospheres,126(3).
MLA	Zhang J.,et al."Climatological Westward-Propagating Semidiurnal Tides and Their Composite Response to Sudden Stratospheric Warmings in SuperDARN and SD-WACCM-X".Journal of Geophysical Research: Atmospheres 126.3(2021).