DOI: 10.1002/2014GL060334
论文题名: Resolving the strange behavior of extraterrestrial potassium in the upper atmosphere
作者: Plane J.M.C. ; Feng W. ; Dawkins E. ; Chipperfield M.P. ; Höffner J. ; Janches D. ; Marsh D.R.
刊名: Geophysical Research Letters
ISSN: 0094-9980
EISSN: 1944-9711
出版年: 2014
卷: 41, 期: 13 起始页码: 4753
结束页码: 4760
语种: 英语
英文关键词: mesospheric metal
; meteoric ablation
; potassium layer
Scopus关键词: Ablation
; Electronic structure
; Ionosphere
; Atmosphere modeling
; Chemistry modeling
; Chemistry-climate models
; Extratropics
; Input functions
; Kinetic rates
; Low temperatures
; Temperature independents
; Atmospheric chemistry
; ablation
; atmospheric pollution
; extraterrestrial matter
; meteor
; neutralization
; potassium
; reaction kinetics
; upper atmosphere
英文摘要: It has been known since the 1960s that the layers of Na and K atoms, which occur between 80 and 105 km in the Earth's atmosphere as a result of meteoric ablation, exhibit completely different seasonal behavior. In the extratropics Na varies annually, with a pronounced wintertime maximum and summertime minimum. However, K varies semiannually with a small summertime maximum and minima at the equinoxes. This contrasting behavior has never been satisfactorily explained. Here we use a combination of electronic structure and chemical kinetic rate theory to determine two key differences in the chemistries of K and Na. First, the neutralization of K+ ions is only favored at low temperatures during summer. Second, cycling between K and its major neutral reservoir KHCO3 is essentially temperature independent. A whole atmosphere model incorporating this new chemistry, together with a meteor input function, now correctly predicts the seasonal behavior of the K layer. Key Points Surprisingly different behavior of Na and K in the upper mesosphere is explained Development of a new K chemistry model within a 3-D chemistry-climate model ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930474912&doi=10.1002%2f2014GL060334&partnerID=40&md5=fa94516187459ef6c0623b98d2378d55
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7244
Appears in Collections: 气候减缓与适应
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作者单位: School of Chemistry, University of Leeds, Leeds, United Kingdom
Recommended Citation:
Plane J.M.C.,Feng W.,Dawkins E.,et al. Resolving the strange behavior of extraterrestrial potassium in the upper atmosphere[J]. Geophysical Research Letters,2014-01-01,41(13).