Interactive comment on ``Retrieval of \\chem{O_2(^1\\Sigma)} and \\chem{O_2(^1\\Delta)} volume emission rates in the mesosphere and lower thermosphere using SCIAMACHY MLT limb scans'' by A.Zarboo et al.

2017 ◽  
Author(s):  
Amirmahdi Zarboo
Keyword(s):  
Lower Thermosphere ◽  
Emission Rates ◽  
Volume Emission ◽  
Mesosphere And Lower Thermosphere

Satellite airglow limb tomography: Methods for recovering structured emission rates in the mesospheric airglow layer

1993 ◽  
Vol 71 (11-12) ◽  
pp. 552-563 ◽  
Author(s):  
Ian C. McDade ◽  
Edward J. Llewellyn
Keyword(s):  
Lower Thermosphere ◽  
Emission Rates ◽  
Two Dimensional ◽  
Spatial Structures ◽  
Airglow Emissions ◽  
Volume Emission ◽  
Mesosphere And Lower Thermosphere ◽  
Tomographic Technique

In this paper, we investigate the possibility of using satellite airglow limb tomography to study spatial structures in the airglow emissions of the upper mesosphere and lower thermosphere. We describe inversion procedures for converting satellite airglow limb observations into two-dimensional distributions of volume emission rates. The performance of the inversion procedures is assessed using simulated limb observations and we demonstrate the potential of this tomographic technique for studying the horizontal and vertical characteristics of wave-driven disturbances in the 80–100 km region.

scholarly journals Retrieval of O<sub>2</sub>(<sup>1</sup>Σ) and O<sub>2</sub>(<sup>1</sup>Δ) volume emission rates in the mesosphere and lower thermosphere using SCIAMACHY MLT limb scans

2018 ◽  
Vol 11 (1) ◽  
pp. 473-487 ◽  
Author(s):  
Amirmahdi Zarboo ◽  
Stefan Bender ◽  
John P. Burrows ◽  
Johannes Orphal ◽  
Miriam Sinnhuber
Keyword(s):  
Atomic Oxygen ◽  
Near Infrared ◽  
Lower Thermosphere ◽  
European Space Agency ◽  
Emission Rates ◽  
Heating Rates ◽  
Space Agency ◽  
Volume Emission ◽  
Mesosphere And Lower Thermosphere ◽  
Scanning Imaging

Abstract. We present the retrieved volume emission rates (VERs) from the airglow of both the daytime and twilight O2(1Σ) band and O2(1Δ) band emissions in the mesosphere and lower thermosphere (MLT). The SCanning Imaging Absorption SpectroMeter for Atmospheric CHartographY (SCIAMACHY) onboard the European Space Agency Envisat satellite observes upwelling radiances in limb-viewing geometry during its special MLT mode over the range 50–150 km. In this study we use the limb observations in the visible (595–811 nm) and near-infrared (1200–1360 nm) bands. We have investigated the daily mean latitudinal distributions and the time series of the retrieved VER in the altitude range from 53 to 149 km. The maximal observed VERs of O2(1Δ) during daytime are typically 1 to 2 orders of magnitude larger than those of O2(1Σ). The latter peaks at around 90 km, whereas the O2(1Δ) emissivity decreases with altitude, with the largest values at the lower edge of the observations (about 53 km). The VER values in the upper mesosphere (above 80 km) are found to depend on the position of the sun, with pronounced high values occurring during summer for O2(1Δ). O2(1Σ) emissions show additional high values at polar latitudes during winter and spring. These additional high values are presumably related to the downwelling of atomic oxygen after large sudden stratospheric warmings (SSWs). Accurate measurements of the O2(1Σ) and O2(1Δ) airglow, provided that the mechanism of their production is understood, yield valuable information about both the chemistry and dynamics in the MLT. For example, they can be used to infer the amounts and distribution of ozone, solar heating rates, and temperature in the MLT.

Seasonal-latitudinal distributions of the populations of the states O2(b1, v = 0 - 2) in the daytime mesosphere and lower thermosphere

2020 ◽  
Author(s):  
Rada Manuilova ◽  
Valentine Yankovsky
Keyword(s):  
Molecular Spectroscopy ◽  
Lower Thermosphere ◽  
Basic Research ◽  
Resonant Absorption ◽  
Emission Rates ◽  
The Monte Carlo Method ◽  
Volume Emission ◽  
Vibrational Kinetics ◽  
Mesosphere And Lower Thermosphere ◽  
Kinetics Of

&lt;p&gt;In the last decade, it was shown that volume emission rates (VMR) for transitions from the levels O&lt;sub&gt;2&lt;/sub&gt;(b&lt;sup&gt;1&lt;/sup&gt;&amp;#931;&lt;sup&gt;+&lt;/sup&gt;&lt;sub&gt;g&lt;/sub&gt;, v&amp;#8217; = 0 &amp;#8211; 2) to the levels O&lt;sub&gt;2&lt;/sub&gt;(X&lt;sup&gt;3&lt;/sup&gt;&amp;#931;&lt;sup&gt;-&lt;/sup&gt;&lt;sub&gt;g&lt;/sub&gt;, v&amp;#8217;&amp;#8217;) can be used as proxies for retrieving the altitude profiles of [O(&lt;sup&gt;3&lt;/sup&gt;P )], [O&lt;sub&gt;3&lt;/sub&gt;] and [CO&lt;sub&gt;2&lt;/sub&gt;] in the mesosphere and lower thermosphere (MLT) [1, 2]. Despite the fact that, in single experiments, radiation in the bands 762, 688, and 628 nm corresponding to the abovementioned transitions were observed (e. g., [3]), no systematic measurements of the intensities of these emissions have yet been performed. The main source of excitation of the levels O&lt;sub&gt;2&lt;/sub&gt;(b&lt;sup&gt;1&lt;/sup&gt;&amp;#931;&lt;sup&gt;+&lt;/sup&gt;&lt;sub&gt;g&lt;/sub&gt;, v&amp;#8217; = 0 &amp;#8211; 2) is the energy transfer from the excited O(&lt;sup&gt;1&lt;/sup&gt;D) atom, along with the resonant absorption of solar radiation in these bands in the mesosphere.&lt;/p&gt;&lt;p&gt;In the framework of the YM2011 model of electronical-vibrational kinetics of the excited products of O&lt;sub&gt;2&lt;/sub&gt; and O&lt;sub&gt;3&lt;/sub&gt; photolysis, using systematic SABER satellite experimental data on the [O (&lt;sup&gt;1&lt;/sup&gt;D)] altitude profiles we calculated the altitudinal-latitudinal distributions of the O&lt;sub&gt;2&lt;/sub&gt;(b&lt;sup&gt;1&lt;/sup&gt;&amp;#931;&lt;sup&gt;+&lt;/sup&gt;&lt;sub&gt;g&lt;/sub&gt;, v&amp;#8217; = 0 &amp;#8211; 2) concentrations &amp;#160;and VMR in the corresponding bands, using the 2010 data as an example. It was shown that there is a seasonal dependence of the altitude profiles of the concentrations of excited states O&lt;sub&gt;2&lt;/sub&gt;(b&lt;sup&gt;1&lt;/sup&gt;&amp;#931;&lt;sup&gt;+&lt;/sup&gt;&lt;sub&gt;g&lt;/sub&gt;, v&amp;#8217; = 0 &amp;#8211; 2) obviously related to the seasonal changes of [O(&lt;sup&gt;3&lt;/sup&gt;P)] and [O&lt;sub&gt;3&lt;/sub&gt;] profiles.&lt;/p&gt;&lt;p&gt;This work was supported by the Russian Foundation for Basic Research &amp;#160;(grant RFBR No. 20-05-00450 A).&lt;/p&gt;&lt;p&gt;1. Yankovsky V. A., Martyshenko K. V., Manuilova R. O., Feofilov A. G. (2016), Oxygen dayglow emissions as proxies for atomic oxygen and ozone in the mesosphere and lower thermosphere, Journal of Molecular Spectroscopy, 327, 209-231, doi:10.1016/j.jms.2016.&lt;/p&gt;&lt;p&gt;2. Yankovsky V. A., Vorobeva E. V., Manuilova R. O. (2019), New techniques for retrieving the [O(3P)], [O3] and [CO2] altitude profiles from dayglow oxygen emissions: Uncertainty analysis by the Monte Carlo method, Advances in Space Research, 64, 1948&amp;#8211;1967, https://doi.org/10.1016/j.asr.2019.07.020&lt;/p&gt;&lt;p&gt;3. Torr M. T., Torr D. G. (1985), A Preliminary Spectroscopic Assessment of the Spacelab 1/Shuttle Optical Environment, J. Geophys. Res. A 90, 1683&amp;#8211;1690, https://doi.org/10.1029/JA090iA02p01683.&lt;/p&gt;

scholarly journals Retrieval of O<sub>2</sub>(<sup>1</sup>Σ) and O<sub>2</sub>(<sup>1</sup>∆) volume emission rates in the mesosphere and lower thermosphere using SCIAMACHY MLT limb scans

2017 ◽  
Author(s):  
Amirmahdi Zarboo ◽  
Stefan Bender ◽  
John P. Burrows ◽  
Johannes Orphal ◽  
Miriam Sinnhuber
Keyword(s):  
Atomic Oxygen ◽  
Near Infrared ◽  
Lower Thermosphere ◽  
European Space Agency ◽  
Emission Rates ◽  
Heating Rates ◽  
Space Agency ◽  
Volume Emission ◽  
Mesosphere And Lower Thermosphere ◽  
Scanning Imaging

Abstract. We present the retrieved volume emission rates (VER) from the airglow of both the daytime and twilight O2(1Σ) band and O2(1Δ) band emissions in the mesosphere/lower thermosphere (MLT). The SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY (SCIAMACHY) on-board the European Space Agency Envisat satellite observes upwelling radiances in limb viewing geometry during its special MLT mode over the range 50 to 150 km. In this study we use the limb observations in the visible (595–811 nm) and near infrared (1200–1360 nm) bands. We have investigated the daily mean latitudinal distributions and the time series of the retrieved VER in the altitude range from 53 to 149 km. The maximal observed VER of O2(1Δ) during daytime are typically 1 to 2 orders of magnitude larger than those of O2(1Σ). The latter peaks at around 90 km, whereas the O2(1Δ) emissivity decreases with altitude, with the largest values at the lower edge of the observations (about 53 km). The VER values in the upper mesosphere (above 80 km) are found to depend on the position of the sun, with pronounced high values occurring during summer for O2(1Δ). O2(1Σ) shows secondary maxima during winter and spring, which are related to the downwelling of atomic oxygen after large sudden stratospheric warmings (SSW). Observations of O2(1Δ) and O2(1Σ) airglow provide valuable information about both the chemistry and dynamics in the MLT and can be used to infer the amounts and distribution of ozone, solar heating rates and temperature in the MLT.

scholarly journals The O(<sup>1</sup>S) dayglow emission as observed by the WIND imaging interferometer on the UARS

1996 ◽  
Vol 14 (6) ◽  
pp. 637-646 ◽  
Author(s):  
V. Singh ◽  
I. C. McDade ◽  
G. G. Shepherd ◽  
B. H. Solheim ◽  
W. E. Ward
Keyword(s):  
Oxygen Atom ◽  
Atomic Oxygen ◽  
Lower Thermosphere ◽  
Dissociative Recombination ◽  
Model Atmosphere ◽  
Emission Rates ◽  
Imaging Interferometer ◽  
Volume Emission ◽  
Excitation Mechanisms ◽  
Three Body

Abstract. Volume emission rate profiles of the O(1D-1S) 5577 Å dayglow measured by the WIND imaging interferometer on the Upper Atmosphere Research Satellite are analyzed to examine the O(1S) excitation mechanisms in the sunlit lower thermosphere and upper mesosphere. The observed emission profiles are compared with theoretical profiles calculated using a model which takes into account all of the known daytime sources of O(1S). These include photoelectron impact on atomic oxygen, dissociative recombination of O+2, photodissociation of molecular oxygen, energy transfer from metastable N2(A3Σ+u) and three body recombination of atomic oxygen. Throughout most of the thermosphere the measured and modelled emission rates are in reasonably good agreement, given the limitations of the model, but in the region below 100 km, where the oxygen atom recombination source is likely to dominate, the measured emission rates are considerably larger than those modelled using the MSIS-90 oxygen atom densities. This discrepancy is discussed in terms of possible inadequacies in the MSIS-90 model atmosphere and/or additional sources of O(1S) at low altitude.

scholarly journals Large-Scale Waves in the Mesosphere and Lower Thermosphere Observed by SABER

2005 ◽  
Vol 62 (12) ◽  
pp. 4384-4399 ◽  
Author(s):  
Rolando R. Garcia ◽  
Ruth Lieberman ◽  
James M. Russell ◽  
Martin G. Mlynczak
Keyword(s):  
Large Scale ◽  
Middle Atmosphere ◽  
Lower Thermosphere ◽  
Normal Modes ◽  
Zonal Winds ◽  
Broadband Emission ◽  
Summer Hemisphere ◽  
Mean Structure ◽  
Mesosphere And Lower Thermosphere ◽  
The Tropics

Abstract Observations made by the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument on board NASA’s Thermosphere–Ionosphere–Mesosphere Energetics and Dynamics (TIMED) satellite have been processed using Salby’s fast Fourier synoptic mapping (FFSM) algorithm. The mapped data provide a first synoptic look at the mean structure and traveling waves of the mesosphere and lower thermosphere (MLT) since the launch of the TIMED satellite in December 2001. The results show the presence of various wave modes in the MLT, which reach largest amplitude above the mesopause and include Kelvin and Rossby–gravity waves, eastward-propagating diurnal oscillations (“non-sun-synchronous tides”), and a set of quasi-normal modes associated with the so-called 2-day wave. The latter exhibits marked seasonal variability, attaining large amplitudes during the solstices and all but disappearing at the equinoxes. SABER data also show a strong quasi-stationary Rossby wave signal throughout the middle atmosphere of the winter hemisphere; the signal extends into the Tropics and even into the summer hemisphere in the MLT, suggesting ducting by westerly background zonal winds. At certain times of the year, the 5-day Rossby normal mode and the 4-day wave associated with instability of the polar night jet are also prominent in SABER data.

Climatological modeling of horizontal winds in the mesosphere and lower thermosphere over a mid-latitude station in China

2015 ◽  
Vol 56 (7) ◽  
pp. 1354-1365 ◽  
Author(s):  
Xin Yao ◽  
Tao Yu ◽  
Biqiang Zhao ◽  
You Yu ◽  
Libo Liu ◽  
...  
Keyword(s):  
Lower Thermosphere ◽  
Latitude Station ◽  
Mesosphere And Lower Thermosphere
Sign in / Sign up

Export Citation Format

Share Document