CEDAR email: AOGS 2015, Hydroxyl layer, AS-24, deadline is extended to 28 February

[Mykhaylo Grygalashvyly]

Dear colleagues. 

 

Let me wish you Happy Lunar New Year, and inform you that the abstract
submission deadline is extended to 28 February 2015. 

Thus, we still have a chance to see your outstanding research on OH* in our
session  AS-24:  “Hydroxyl layer on Earth and other planets”.

 

Please, do not forget submit your abstracts.

 

http://www.asiaoceania.org/aogs2015/public.asp?page=abstract.htm

 

Best wishes for the lunar new year!

 

Yours sincerely,

Michael Grygalashvyly

 

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AOGS 2015: August 2 - 7, Singapore.   

 

AS-24:  Hydroxyl layer on Earth and other planets

 

Conveners: Michael Grygalashvyly (Leibniz-Institute of Atmospheric Physics
(IAP), Germany), William Ward (University of New Brunswick, Canada), Orhan
SEN (Istanbul Technical University (ITU) Faculty of Aeronautics and
Astronautics, Turkey)

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Hydroxyl layer on Earth and other planets

 

The airglow measurements in the Meinel band of excited hydroxyl is a tool
extensively used to infer temperatures at mesopause height and information
about dynamical processes, such as gravity waves, planetary waves, and
tides. Moreover, the observation of emission from OH* Meinel bands is used
to determine atomic oxygen, ozone, and atomic hydrogen which are very
difficult to measure by other methods, and, in perspective, can be used to
retrieve the chemical heating rate from the most significant exothermic
reaction in the mesopause. A number of investigations are focused on
temperature trends obtained from measurements of the relative intensities of
two lines in one of the vibrational-rotational bands.  Recently, OH* Meinel
band emissions were detected on Mars and Venus that give rise new interest
to OH*- layers.

In spite of large application, less attention was devoted to parameters of
the layer such as thickness, altitude, and number density. Concerning the
OH*-layer and its behavior a number of questions arise. How does the
altitude of OH* change? How does the intensity (number density) of OH*
change? Which variations in temperature corresponds to OH* variations? How
does the variation in OH* depend on the Lyman-alpha variation? How much of
the variation is dependent on chemistry, dynamics and the Lyman-alpha,
respectively? How does the OH* variation depend on the vibrational number?
What is the relative behavior for OH* with different vibrational numbers?
What is the dependence between the height and intensity of the emission
(number density) of the layer? These questions can be asked about the
variation of height, number density, thickness, and corresponding
temperature in the framework of seasonal-latitudinal, short-term, and
long-term variability. The questions on formation-relaxation processes of
OH* are represent an additional field related to hydroxyl layer. 

In frame of the session we intend to collect some theoretical, modelling and
experimental works on these questions.

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