气候变化领域集成服务门户(CCPortal): Climatology of the mesopause relative density using a global distribution of meteor radars

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DOI	10.5194/acp-19-7567-2019
	Climatology of the mesopause relative density using a global distribution of meteor radars
	Yi W.; Xue X.; Reid I.M.; Murphy D.J.; Hall C.M.; Tsutsumi M.; Ning B.; Li G.; Vincent R.A.; Chen J.; Wu J.; Chen T.; Dou X.
发表日期	2019
ISSN	16807316
起始页码	7567
结束页码	7581
卷号	19 期号:11
英文摘要	The existing distribution of meteor radars located from high-to low-latitude regions provides a favorable temporal and spatial coverage for investigating the climatology of the global mesopause density. In this study, we report the climatology of the mesopause relative density estimated using multiyear observations from nine meteor radars, namely, the Davis Station (68.6 S, 77.9 E), Svalbard (78.3 N, 16 E) and Troms (69.6 N, 19.2 E) meteor radars located at high latitudes; the Mohe (53.5 N, 122.3 E), Beijing (40.3 N, 116.2 E),Mengcheng (33.4 N, 116.6 E) and Wuhan (30.5 N, 114.6 E) meteor radars located in the midlatitudes; and the Kunming (25.6 N, 103.8 E) and Darwin (12.3 S, 130.8 E) meteor radars located at low latitudes. The daily mean relative density was estimated using ambipolar diffusion coefficients derived from the meteor radars and temperatures from the Microwave Limb Sounder (MLS) on board the Aura satellite. The seasonal variations in the Davis Station meteor radar relative densities in the southern polar mesopause are mainly dominated by an annual oscillation (AO). The mesopause relative densities observed by the Svalbard and Troms meteor radars at high latitudes and the Mohe and Beijing meteor radars at high midlatitudes in the Northern Hemisphere show mainly an AO and a relatively weak semiannual oscillation (SAO). The mesopause relative densities observed by the Mengcheng and Wuhan meteor radars at lower midlatitudes and the Kunming and Darwin meteor radars at low latitudes show mainly an AO. The SAO is evident in the Northern Hemisphere, especially at high latitudes, and its largest amplitude, which is detected at the Troms meteor radar, is comparable to the AO amplitudes. These observations indicate that the mesopause relative densities over the southern and northern high latitudes exhibit a clear seasonal asymmetry. The maxima of the yearly variations in the mesopause relative densities display a clear latitudinal variation across the spring equinox as the latitude decreases; these latitudinal variation characteristics may be re-lated to latitudinal changes influenced by gravity wave forcing. In addition to an AO, the mesopause relative densities over low latitudes also clearly show an intraseasonal variation with a periodicity of 30-60 d. © 2019 Copernicus. All rights reserved.
语种	英语
scopus关键词	climatology; mesopause; Northern Hemisphere; radar; seasonal variation
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/144351
作者单位	CAS Key Laboratory of Geospace Environment, Department of Geophysics and Planetary Sciences, University of Science and Technology of China, Hefei, China; Mengcheng National Geophysical Observatory, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China; ATRAD Pty Ltd., Thebarton, SA, Australia; School of Physical Sciences, University of Adelaide, Adelaide, SA, Australia; Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, China; Australian Antarctic Division, Kingston, TN, Australia; Tromsø Geophysical Observatory, UiT - the Arctic University of Norway, Troms, Norway; National Institute of Polar Research, Tachikawa, Japan; Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; National Key Laboratory of Electromagnetic Environment, China Research Institute of Radiowave Propagation, Qingdao, China
推荐引用方式 GB/T 7714	Yi W.,Xue X.,Reid I.M.,et al. Climatology of the mesopause relative density using a global distribution of meteor radars[J],2019,19(11).
APA	Yi W..,Xue X..,Reid I.M..,Murphy D.J..,Hall C.M..,...&Dou X..(2019).Climatology of the mesopause relative density using a global distribution of meteor radars.Atmospheric Chemistry and Physics,19(11).
MLA	Yi W.,et al."Climatology of the mesopause relative density using a global distribution of meteor radars".Atmospheric Chemistry and Physics 19.11(2019).