globalchange  > 科学计划与规划
DOI: 10.1002/2015GL065395
论文题名:
Evidence for stratospheric sudden warming effects on the upper thermosphere derived from satellite orbital decay data during 1967-2013
作者: Yamazaki Y.; Kosch M.J.; Emmert J.T.
刊名: Geophysical Research Letters
ISSN: 0094-8621
EISSN: 1944-8352
出版年: 2015
卷: 42, 期:15
起始页码: 6180
结束页码: 6188
语种: 英语
英文关键词: polar vortex weakening ; satellite drag ; stratospheric sudden warming ; thermosphere ; total mass density ; vertical atmospheric coupling
Scopus关键词: Drag ; Geomagnetism ; Ionosphere ; Satellites ; Solar energy ; Upper atmosphere ; Vortex flow ; Atmospheric coupling ; Polar vortex ; Satellite drag ; Stratospheric sudden warmings ; Thermosphere ; Total mass density ; Orbits ; global warming ; polar vortex ; satellite data ; solar activity ; stratosphere ; temperature effect ; thermosphere ; wave force
英文摘要: We investigate possible impact of stratospheric sudden warmings (SSWs) on the thermosphere by using long-term data of the global average thermospheric total mass density derived from satellite orbital drag during 1967-2013. Residuals are analyzed between the data and empirical Global Average Mass Density Model (GAMDM) that takes into account density variability due to solar activity, season, geomagnetic activity, and long-term trend. A superposed epoch analysis of 37 SSW events reveals a density reduction of 3-7% at 250-575 km around the time of maximum polar vortex weakening. The relative density perturbation is found to be greater at higher altitudes. The temperature perturbation is estimated to be -7.0 K at 400 km. We show that the density reduction can arise from enhanced wave forcing from the lower atmosphere. ©2015. The Authors.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84940452377&doi=10.1002%2f2015GL065395&partnerID=40&md5=ab9934d6d552660fe0194d903f470390
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8237
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Department of Physics, Lancaster University, Lancaster, United Kingdom

Recommended Citation:
Yamazaki Y.,Kosch M.J.,Emmert J.T.. Evidence for stratospheric sudden warming effects on the upper thermosphere derived from satellite orbital decay data during 1967-2013[J]. Geophysical Research Letters,2015-01-01,42(15).
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