| DOI: | 10.1002/2014GL061471
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| 论文题名: | The winter helium bulge revisited |
| 作者: | Liu X.; Wang W.; Thayer J.P.; Burns A.; Sutton E.; Solomon S.C.; Qian L.; Lucas G.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9758
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| EISSN: | 1944-9489
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| 出版年: | 2014
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| 卷: | 41, 期:19 | | 起始页码: | 6603
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| 结束页码: | 6609
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| 语种: | 英语
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| 英文关键词: | minor species
; molecular diffusion
; vertical advection
; winter helium bulge
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| Scopus关键词: | Advection
; Diffusion
; Diffusion in liquids
; Diffusion in solids
; Ionosphere
; General circulation model
; minor species
; Molecular diffusion
; National center for atmospheric researches
; Self consistent modeling
; Thermosphere-ionosphere
; Vertical advection
; winter helium bulge
; Helium
; advection
; atmospheric transport
; climate modeling
; concentration (composition)
; helium
; thermosphere
; wind field
; winter
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| 英文摘要: | A newly implemented helium module in the National Center for Atmospheric Research-Thermosphere Ionosphere Electrodynamics general circulation model offers the first opportunity in three decades to describe helium behavior in the context of a first principles, self-consistent model and to test early theories of wintertime helium bulge formation. This study shows general agreement with the findings of Reber and Hays (1973) but articulates the definitive role of vertical advection in the bulge formation. Our findings indicate vertical advection and molecular diffusion are the dominate processes responsible for the solstice helium distribution. Horizontal winds indirectly contribute to the helium bulge formation by their divergent wind field that leads to vertical winds in order to maintain thermosphere mass continuity. As a minor gas, thermospheric helium does not contribute to mass continuity and its distribution is dictated by more local interactions and constraints. Key Points Local vertical advection and molecular diffusion drive winter helium bulgeInterhemispheric transport does not directly cause winter helium bulge ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911061355&doi=10.1002%2f2014GL061471&partnerID=40&md5=9bce15247f95b73ae8dedf1bab80a0af
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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/7022
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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 Boulder, Boulder, CO, United States
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| Recommended Citation: | |
Liu X.,Wang W.,Thayer J.P.,et al. The winter helium bulge revisited[J]. Geophysical Research Letters,2014-01-01,41(19).
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