globalchange  > 科学计划与规划
DOI: 10.1002/2016GL071755
论文题名:
A study of the dissociative recombination of CaO+ with electrons: Implications for Ca chemistry in the upper atmosphere
作者: Bones D.L.; Gerding M.; Höffner J.; Martín J.C.G.; Plane J.M.C.
刊名: Geophysical Research Letters
ISSN: 0094-8303
EISSN: 1944-8034
出版年: 2016
卷: 43, 期:24
起始页码: 12333
结束页码: 12339
语种: 英语
英文关键词: dissociative electron recombination ; ion-molecule chemistry ; meteoric metal layers ; sporadic layers
Scopus关键词: Argon lasers ; Atmospheric electricity ; Calcium ; Dissociation ; E region ; Ions ; Laser ablation ; Molecules ; Photodissociation ; Upper atmosphere ; Atmospheric implications ; Dissociative recombinations ; Electron recombinations ; Flowing afterglows ; Gas phase chemistry ; Metal layer ; Rate coefficients ; Sporadic layers ; Atmospheric chemistry
英文摘要: The dissociative recombination of CaO+ ions with electrons has been studied in a flowing afterglow reactor. CaO+ was generated by the pulsed laser ablation of a Ca target, followed by entrainment in an Ar+ ion/electron plasma. A kinetic model describing the gas-phase chemistry and diffusion to the reactor walls was fitted to the experimental data, yielding a rate coefficient of (3.0 ± 1.0) × 10−7 cm3 molecule−1 s−1 at 295 K. This result has two atmospheric implications. First, the surprising observation that the Ca+/Fe+ ratio is ~8 times larger than Ca/Fe between 90 and 100 km in the atmosphere can now be explained quantitatively by the known ion-molecule chemistry of these two metals. Second, the rate of neutralization of Ca+ ions in a descending sporadic E layer is fast enough to explain the often explosive growth of sporadic neutral Ca layers. ©2016. The Authors.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85007479667&doi=10.1002%2f2016GL071755&partnerID=40&md5=926d771a1484bd3a0a2b1b8bd22f8ac0
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9266
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: School of Chemistry, University of Leeds, Leeds, United Kingdom

Recommended Citation:
Bones D.L.,Gerding M.,Höffner J.,et al. A study of the dissociative recombination of CaO+ with electrons: Implications for Ca chemistry in the upper atmosphere[J]. Geophysical Research Letters,2016-01-01,43(24).
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