globalchange  > 影响、适应和脆弱性
DOI: 10.1002/jgrd.50236
论文题名:
Geomagnetic activity signatures in wintertime stratosphere wind, temperature, and wave response
作者: Seppälä A.; Lu H.; Clilverd M.A.; Rodger C.J.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期:5
起始页码: 2169
结束页码: 2183
语种: 英语
英文关键词: energetic particle precipitation ; geomagnetic activity ; stratosphere ; wave-mean flow interaction
Scopus关键词: Precipitation (chemical) ; Upper atmosphere ; Vortex flow ; Wave propagation ; Energetic particles ; Geomagnetic activities ; Geomagnetic effects ; Northern Hemispheres ; Quasi-biennial oscillation ; Stratospheric polar vortex ; Wave-mean-flow interaction ; Zonal-mean zonal winds ; Geomagnetism ; data interpretation ; data set ; geomagnetic field ; geomagnetism ; irradiance ; Northern Hemisphere ; planetary wave ; polar vortex ; quasi-biennial oscillation ; stratosphere ; wave modeling ; winter ; zonal wind
英文摘要: We analyzed ERA-40 and ERA Interim meteorological re-analysis data for signatures of geomagnetic activity in zonal mean zonal wind, temperature, and Eliassen-Palm flux in the Northern Hemisphere extended winter (November-March). We found that for high geomagnetic activity levels, the stratospheric polar vortex becomes stronger in late winter, with more planetary waves being refracted equatorward. The statistically significant signals first appear in December and continue until March, with poleward propagation of the signals with time, even though some uncertainty remains due to the limited amount of data available (∼ 50 years). Our results also indicated that the geomagnetic effect on planetary wave propagation has a tendency to take place when the stratosphere background flow is relatively stable or when the polar vortex is stronger and less disturbed in early winter. These conditions typically occur during high solar irradiance cycle conditions or westerly quasi-biennial oscillation conditions. © 2013. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63870
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Finnish Meteorological Institute, Helsinki, Finland; British Antarctic Survey, NERC, Cambridge, United Kingdom; Department of Physics, University of Otago, Dunedin, New Zealand

Recommended Citation:
Seppälä A.,Lu H.,Clilverd M.A.,et al. Geomagnetic activity signatures in wintertime stratosphere wind, temperature, and wave response[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(5)
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