scholarly journals Errors in Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) kinetic temperature caused by non-local-thermodynamic-equilibrium model parameters

2008 ◽  
Vol 113 (D24) ◽  
Author(s):  
M. García-Comas ◽  
M. López-Puertas ◽  
B. T. Marshall ◽  
P. P. Wintersteiner ◽  
B. Funke ◽  
...  
Keyword(s):  
Thermodynamic Equilibrium ◽  
Equilibrium Model ◽  
Local Thermodynamic Equilibrium ◽  
Model Parameters ◽  
Kinetic Temperature ◽  
Broadband Emission ◽  
Non Local ◽  
Thermodynamic Equilibrium Model

scholarly journals Non–Local Thermodynamic Equilibrium Model of NGC 6543’s Central Star and Its Relation to the Surrounding Planetary Nebula

2008 ◽  
Vol 681 (1) ◽  
pp. 333-342 ◽  
Author(s):  
L. N. Georgiev ◽  
M. Peimbert ◽  
D. J. Hillier ◽  
M. G. Richer ◽  
A. Arrieta ◽  
...  
Keyword(s):  
Thermodynamic Equilibrium ◽  
Equilibrium Model ◽  
Planetary Nebula ◽  
Local Thermodynamic Equilibrium ◽  
Central Star ◽  
Non Local ◽  
Thermodynamic Equilibrium Model

scholarly journals Resolving the mesospheric nighttime 4.3 μm emission puzzle: New model calculations improve agreement with SABER observations

2016 ◽  
Author(s):  
Peter A. Panka ◽  
Alexander A. Kutepov ◽  
Konstantinos S. Kalogerakis ◽  
Diego Janches ◽  
James M. Russell ◽  
...  
Keyword(s):  
Local Thermodynamic Equilibrium ◽  
Vibrational Excitation ◽  
Direct Transfer ◽  
Laboratory Studies ◽  
Model Calculations ◽  
Broadband Emission ◽  
Non Local ◽  
Thermodynamic Equilibrium Model ◽  
Additional Channel

Abstract. Since 2002, SABER (Sounding of the Atmosphere using Broadband Emission Radiometry)/TIMED (Thermosphere, Ionosphere, Mesosphere, Energetics and Dynamics) has been continuously measuring the day- and nighttime infrared limb radiances of the mesosphere and lower thermoshere (MLT) in ten broadband channels. Recently, the MLT daytime temperature/ pressure and CO2 densities have been obtained self-consistently from SABER 15 μm and 4.3 μm emission observations. However, similar nighttime data remain unprocessed due to a lack of understanding of the 4.3 μm emission generating mechanisms. A previous study suggested the “direct” transfer OH(v)) ⇒ N2(v)) ⇒ CO2(v3)) ⇒ 4.3 μm of vibrational excitation from OH(v) to CO2 in the nighttime mesosphere. However, accounting for this excitation mechanism alone leads to significant under-prediction (by up to 80 %) of observed 4.3 μm limb radiances. Recently, theoretical and laboratory studies have suggested an additional “indirect” nighttime channel OH(v)) ⇒ O(1D)) ⇒ N2(v)) ⇒ CO2(v3)) ⇒ 4.3 μm of this energy transfer. We implemented this new channel in our non-LTE (non-Local Thermodynamic Equilibrium) model and show that, for various latitudinal and seasonal scenarios, including this additional channel brings differences between simulated and measured nighttime SABER 4.3 μm limb radiances to (−20, +30) %. These results confirm the important role of the new mechanism as a source of the nighttime 4.3 μm emission. This finding creates new opportunities for the application of CO2 4.3 μm observations in the study of the energetics and dynamics of the nighttime MLT.

scholarly journals Retrieval of Kinetic Temperature and Carbon Dioxide Abundance From Non-Local Thermodynamic Equilibrium Limb Emission Measurements Made by the SABER Experiment on the TIMED Satellite

2003 ◽  
Author(s):  
Christopher J. Mertens ◽  
Martin G. Mlynczak ◽  
Manuel Lopez-Puertas ◽  
Peter P. Wintersteiner ◽  
Richard H. Picard ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Thermodynamic Equilibrium ◽  
Local Thermodynamic Equilibrium ◽  
Kinetic Temperature ◽  
Non Local

Enzyme adsorption in porous supports: Local thermodynamic equilibrium model

1985 ◽  
Vol 27 (7) ◽  
pp. 961-971 ◽  
Author(s):  
Henrik Pedersen ◽  
Larry Furler ◽  
K. Venkatasubramanian ◽  
Jiri Prenosil ◽  
Ernst Stuker
Keyword(s):  
Thermodynamic Equilibrium ◽  
Equilibrium Model ◽  
Local Thermodynamic Equilibrium ◽  
Enzyme Adsorption ◽  
Porous Supports ◽  
Thermodynamic Equilibrium Model

scholarly journals New insights for mesospheric OH: multi-quantum vibrational relaxation as a driver for non-local thermodynamic equilibrium

2018 ◽  
Vol 36 (1) ◽  
pp. 13-24 ◽  
Author(s):  
Konstantinos S. Kalogerakis ◽  
Daniel Matsiev ◽  
Philip C. Cosby ◽  
James A. Dodd ◽  
Stefano Falcinelli ◽  
...  
Keyword(s):  
Thermodynamic Equilibrium ◽  
Vibrational Relaxation ◽  
Local Thermodynamic Equilibrium ◽  
Vibrational Excitation ◽  
Kinetic Temperature ◽  
Population Distributions ◽  
Vibrational Levels ◽  
Non Local ◽  
Relationship Of ◽  
The Relationship

Abstract. The question of whether mesospheric OH(v) rotational population distributions are in equilibrium with the local kinetic temperature has been debated over several decades. Despite several indications for the existence of non-equilibrium effects, the general consensus has been that emissions originating from low rotational levels are thermalized. Sky spectra simultaneously observing several vibrational levels demonstrated reproducible trends in the extracted OH(v) rotational temperatures as a function of vibrational excitation. Laboratory experiments provided information on rotational energy transfer and direct evidence for fast multi-quantum OH(high-v) vibrational relaxation by O atoms. We examine the relationship of the new relaxation pathways with the behavior exhibited by OH(v) rotational population distributions. Rapid OH(high-v) + O multi-quantum vibrational relaxation connects high and low vibrational levels and enhances the hot tail of the OH(low-v) rotational distributions. The effective rotational temperatures of mesospheric OH(v) are found to deviate from local thermodynamic equilibrium for all observed vibrational levels. Dedicated to Tom G. Slanger in celebration of his 5 decades of research in aeronomy.

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