DOI: 10.1002/2017JD026541
论文题名: Structure and seasonal variations of the nocturnal mesospheric K layer at Arecibo
作者: Yue X. ; Friedman J.S. ; Wu X. ; Zhou Q.H.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期: 14 起始页码: 7260
结束页码: 7275
语种: 英语
英文关键词: Arecibo Observatory
; mesopause dynamics
; mesopause temperature
; metal layers
; potassium layer
; resonance lidar
英文摘要: We present the seasonal variations of the nocturnal mesospheric potassium (K) layer at Arecibo, Puerto Rico (18.35°N, 66.75°W) from 160 nights of K Doppler lidar observations between December 2003 and January 2010, during which the solar activity is mostly low. The background temperature is also measured simultaneously by the lidar and shows a strong semiannual oscillation with maxima occurring during equinoxes at all altitudes. The annual mean K density profile is approximately Gaussian with a peak altitude of 91.7 km. The K column abundance and the centroid height have strong semiannual variations, with maxima at the solstices. Both parameters are negatively correlated to the mean background temperature with a correlation coefficient < −0.5. The root-mean-square (RMS) width has a distinct annual oscillation with the largest width occurring in May. The seasonal variation of the centroid height is similar to that of the Fe layer at the same site. The seasonal temperature variation indicates significant enhanced wave-induced downward transport for both species during spring and autumn. This explains the metal layer centroid height and column abundance variations at Arecibo and provides a general mechanism to account for the seasonal variations in the centroid height of all metal species measured at low-latitude and midlatitude sites. ©2017. American Geophysical Union. All Rights Reserved.
资助项目: 41474128
; AGS-1243133
; AGS-1243133
; AGS-1262826
; AGS-1262826
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62625
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: School of Electronic Information, Wuhan University, Wuhan, China; Collaborative Innovation Center of Geospatial Technology, Wuhan, China; Arecibo Observatory, Arecibo, Puerto Rico; Puerto Rico Photonics Institute, School of Environmental Affairs, Universidad Metropolitana, San Juan, Puerto Rico; Electrical and Computer Engineering Department, Miami University, Oxford, OH, United States
Recommended Citation:
Yue X.,Friedman J.S.,Wu X.,et al. Structure and seasonal variations of the nocturnal mesospheric K layer at Arecibo[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(14)