| DOI: | 10.1002/2014GL062103
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| 论文题名: | Lunar tide in the thermosphere and weakening of the northern polar vortex |
| 作者: | Zhang X.; Forbes J.M.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9526
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| EISSN: | 1944-9257
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| 出版年: | 2014
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| 卷: | 41, 期:23 | | 起始页码: | 8201
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| 结束页码: | 8207
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| 语种: | 英语
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| 英文关键词: | E-region
; lunar tide
; polar vortex
; PVW
; SSW
; stratosphere
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| Scopus关键词: | E region
; Ionospheric measurement
; Time delay
; Upper atmosphere
; Vortex flow
; Level of predictabilities
; Lunar tides
; Polar vortex
; PVW
; Research and application
; Sounding of the atmosphere using broadband emission radiometry
; SSW
; Stratospheric polar vortex
; Moon
; amplitude
; climate change
; ionosphere
; lunar cycle
; polar vortex
; stratosphere
; thermosphere
; vortex flow
; wind field
; zonal wind
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| 英文摘要: | The lunar tide and its variability are beginning to be realized as elements of ionosphere-thermosphere weather. Herein we demonstrate that an enhancement in M2 amplitude at 110 km in the dynamo region is related to the timing and intensity of stratospheric polar vortex weakening (PVW). Timing of the PVW, which typically occurs during January-February, changes on the order of 4-7 d/yr between 2002 and 2013 and the M2 enhancement changes with it, with a time delay of order 2.8 days. The M2 temperature amplitude at 110 km as determined from the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) measurements on the Thermosphere Ionosphere Mesosphere Energetics Dynamics (TIMED) spacecraft increases linearly from about 20 K to 29 K as the westward zonal mean zonal wind increases from about 10 m s-1 to 80 m s-1 at 70-N and 48 km altitude in accord with PVW events from year to year according to Modern-Era Retrospective Analysis for Research and Applications (MERRA) data. These relationships point to a level of predictability regarding impacts of the lunar tide on thermosphere and ionosphere densities, winds, and plasma drifts. Key PointsLunar M2 tide intensifies in connection with polar vortex weakening (PVW)M2 enhancement at 110 km occurs about 2.8 days after PVWOccurrence day of year shifts by about 4-7 d/yr ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921604429&doi=10.1002%2f2014GL062103&partnerID=40&md5=56d58224b94cefe3654ca2c00edf3418
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/6790
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Department of Aerospace Engineering Sciences, University of Colorado at Boulder, Boulder, CO, United States
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| Recommended Citation: | |
Zhang X.,Forbes J.M.. Lunar tide in the thermosphere and weakening of the northern polar vortex[J]. Geophysical Research Letters,2014-01-01,41(23).
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