DOI: 10.1002/2015GL063718
论文题名: Diurnal variation of the potassium layer in the upper atmosphere
作者: Feng W. ; Höffner J. ; Marsh D.R. ; Chipperfield M.P. ; Dawkins E.C.M. ; Viehl T.P. ; Plane J.M.C.
刊名: Geophysical Research Letters
ISSN: 0094-9462
EISSN: 1944-9193
出版年: 2015
卷: 42, 期: 9 起始页码: 3619
结束页码: 3626
语种: 英语
英文关键词: diurnal variation
; lidar
; WACCM-K
Scopus关键词: Climate models
; Optical radar
; Potassium
; Chemistry-climate models
; Diurnal fluctuations
; Diurnal variation
; Measurements of
; Number density
; Photochemical conversion
; Temperature independents
; Vertical transports
; Upper atmosphere
; atmospheric chemistry
; climate modeling
; diurnal variation
; Doppler lidar
; potassium
; three-dimensional modeling
; upper atmosphere
; Germany
; Kuhlungsborn
; Mecklenburg-West Pomerania
英文摘要: Measurements of the diurnal cycle of potassium (K) atoms between 80 and 110km have been made during October (for the years 2004-2011) using a Doppler lidar at Kühlungsborn, Germany (54.1°N, 11.7°E). A pronounced diurnal variation is observed in the K number density, which is explored by using a detailed description of the neutral and ionized chemistry of K in a three-dimensional chemistry climate model. The model captures both the amplitude and phase of the diurnal and semidiurnal variability of the layer, although the peak diurnal amplitude around 90km is overestimated. The model shows that the total potassium density (≈K+K++KHCO3 ) exhibits little diurnal variation at each altitude, and the diurnal variations are largely driven by photochemical conversion between these reservoir species. In contrast, tidally driven vertical transport has a small effect at this midlatitude location, and diurnal fluctuations in temperature are of little significance because they are small and the chemistry of K is relatively temperature independent. Key Points Pronounced local time dependency in the K number density WACCM-K simulates the diurnal variation of K in good agreement with observation Photochemistry plays an important role in the diurnal variation of K ©2015. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930474038&doi=10.1002%2f2015GL063718&partnerID=40&md5=bb7afcdf14217b5453cd2e86683a325f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9077
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:
Feng W.,Höffner J.,Marsh D.R.,et al. Diurnal variation of the potassium layer in the upper atmosphere[J]. Geophysical Research Letters,2015-01-01,42(9).