气候变化领域集成服务门户(CCPortal): Equatorial waves resolved by balloon-borne Global Navigation Satellite System radio occultation in the Strateole-2 campaign

CCPortal

DOI	10.5194/acp-22-15379-2022
	Equatorial waves resolved by balloon-borne Global Navigation Satellite System radio occultation in the Strateole-2 campaign
	Cao, Bing; Haase, Jennifer S.; Murphy, Michael J.; Alexander, M. Joan; Bramberger, Martina; Hertzog, Albert
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	15379
结束页码	15402
卷号	22 期号:23 页码:24
英文摘要	Current climate models have difficulty representing realistic wave-mean flow interactions, partly because the contribution from waves with fine vertical scales is poorly known. There are few direct observations of these waves, and most models have difficulty resolving them. This observational challenge cannot be addressed by satellite or sparse ground-based methods. The Strateole-2 long-duration stratospheric superpressure balloons that float with the horizontal wind on constant-density surfaces provide a unique platform for wave observations across a broad range of spatial and temporal scales. For the first time, balloon-borne Global Navigation Satellite System (GNSS) radio occultation (RO) is used to provide high-vertical-resolution equatorial wave observations. By tracking navigation signal refractive delays from GPS satellites near the horizon, 40-50 temperature profiles were retrieved daily, from balloon flight altitude (similar to 20 km) down to 6-8 km altitude, forming an orthogonal pattern of observations over a broad area (+/- 400-500 km) surrounding the flight track. The refractivity profiles show an excellent agreement of better than 0.2 % with co-located radiosonde, spaceborne COSMIC-2 RO, and reanalysis products. The 200-500 m vertical resolution and the spatial and temporal continuity of sampling make it possible to extract properties of Kelvin waves and gravity waves with vertical wavelengths as short as 2-3 km. The results illustrate the difference in the Kelvin wave period (20 vs. 16 d) in the Lagrangian versus ground-fixed reference and as much as a 20 % difference in amplitude compared to COSMIC-2, both of which impact estimates of momentum flux. A small dataset from the extra Galileo, GLONASS, and BeiDou constellations demonstrates the feasibility of nearly doubling the sampling density in planned follow-on campaigns when data with full equatorial coverage will contribute to a better estimate of wave forcing on the quasi-biennial oscillation (QBO) and improved QBO representation in models.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000894505600001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/272981
作者单位	University of California System; University of California San Diego; Scripps Institution of Oceanography; NorthWest Research Associates; Centre National de la Recherche Scientifique (CNRS); Institut Polytechnique de Paris; UDICE-French Research Universities; Sorbonne Universite
推荐引用方式 GB/T 7714	Cao, Bing,Haase, Jennifer S.,Murphy, Michael J.,et al. Equatorial waves resolved by balloon-borne Global Navigation Satellite System radio occultation in the Strateole-2 campaign[J],2022,22(23):24.
APA	Cao, Bing,Haase, Jennifer S.,Murphy, Michael J.,Alexander, M. Joan,Bramberger, Martina,&Hertzog, Albert.(2022).Equatorial waves resolved by balloon-borne Global Navigation Satellite System radio occultation in the Strateole-2 campaign.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(23),24.
MLA	Cao, Bing,et al."Equatorial waves resolved by balloon-borne Global Navigation Satellite System radio occultation in the Strateole-2 campaign".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.23(2022):24.