Please use this identifier to cite or link to this item:
Files in This Item:
File SizeFormat 
Dawkins_et_al-2016-Journal_of_Geophysical_Research__Space_Physics.pdf1.2 MBAdobe PDFView/Open
Title: Solar cycle response and long-term trends in the mesospheric metal layers
Authors: Dawkins, E. C. M.Plane, J. M. C.Chipperfield, M. P.Feng, W.Marsh, D. R.Höffner, J.Janches, D.
Publishers Version:
Issue Date: 2016
Published in: Journal of Geophysical Research: Space Physics, Volume 121, Issue 7, Page 7153-7165
Publisher: Hoboken, NJ : Wiley
Abstract: The meteoric metal layers (Na, Fe, and K)—which form as a result of the ablation of incoming meteors—act as unique tracers for chemical and dynamical processes that occur within the upper mesosphere/lower thermosphere region. In this work, we examine whether these metal layers are sensitive indicators of decadal long-term changes within the upper atmosphere. Output from a whole-atmosphere climate model is used to assess the response of the Na, K, and Fe layers across a 50 year period (1955–2005). At short timescales, the K layer has previously been shown to exhibit a very different seasonal behavior compared to the other metals. Here we show that this unusual behavior is also exhibited at longer timescales (both the ~11 year solar cycle and 50 year periods), where K displays a much more pronounced response to atmospheric temperature changes than either Na or Fe. The contrasting solar cycle behavior of the K and Na layers predicted by the model is confirmed using satellite and lidar observations for the period 2004–2013.
Keywords: mesospheric metal; solar cycle; long-term trends; modeling; satellite retrieval
DDC: 550
License: CC BY 4.0 Unported
Link to License:
Appears in Collections:Geowissenschaften

This item is licensed under a Creative Commons License Creative Commons