Atmospheric Optical Characteristics in the Area of 30–400 km
Extremely weak lidar reflections in the thermosphere, which correlate with ionosonde data, were detected in 2008 and 2017 over Kamchatka during seasons of low aerosol filling of the atmosphere at solar activity minima. Here, these reflections are considered in comparison with mesospheric and stratos...
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ftmdpi:oai:mdpi.com:/2072-4292/14/23/6108/ 2023-08-20T04:07:40+02:00 Atmospheric Optical Characteristics in the Area of 30–400 km Boris M. Shevtsov Andrey N. Perezhogin Ilya N. Seredkin agris 2022-12-02 application/pdf https://doi.org/10.3390/rs14236108 EN eng Multidisciplinary Digital Publishing Institute Atmospheric Remote Sensing https://dx.doi.org/10.3390/rs14236108 https://creativecommons.org/licenses/by/4.0/ Remote Sensing; Volume 14; Issue 23; Pages: 6108 optics of the atmosphere resonant lidar laser ionozond lidar reflections in the thermosphere coefficient and cross-section of light scattering ionization aerosol solar activity ion aeronomy Text 2022 ftmdpi https://doi.org/10.3390/rs14236108 2023-08-01T07:37:09Z Extremely weak lidar reflections in the thermosphere, which correlate with ionosonde data, were detected in 2008 and 2017 over Kamchatka during seasons of low aerosol filling of the atmosphere at solar activity minima. Here, these reflections are considered in comparison with mesospheric and stratospheric lidar signals that makes it possible to determine favorable conditions for thermospheric lidar observations. In 2014, it was shown that lines of transitions between the excited states of atomic nitrogen ions fall within the 532 nm lidar signal emission band, and in 2017, lidar reflections in the thermosphere were simultaneously obtained at 561 and 532 nm excited transitions of atomic oxygen and nitrogen ions, thereby the resonant nature of thermospheric lidar reflections was established and confirmed. Here, using lidar signals at wavelengths of 561 and 532 nm in the altitude range of 30–400 km, by solving the inverse problem, we restore the light scattering coefficients corresponding to these wavelengths that makes it possible to compare the optical characteristics of the thermosphere, mesosphere, and upper stratosphere and to determine the relationship between resonant, Rayleigh, and aerosol light scattering at different heights of the atmosphere. In conclusion, using the scattering coefficients in the thermosphere, we find the cross-sections of light scattering at the 561 and 532 nm transitions of atomic oxygen and nitrogen ions and explain why the scattering coefficients for O+, 561 nm are less than for N+, 532 nm, while the concentration of O+ is two orders of magnitude higher than N+. The results obtained here are of interest for understanding the ionization effect of solar activity on the optical characteristics of the atmosphere that determine weather and climate changes. Text Kamchatka MDPI Open Access Publishing Remote Sensing 14 23 6108 |
institution |
Open Polar |
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MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
optics of the atmosphere resonant lidar laser ionozond lidar reflections in the thermosphere coefficient and cross-section of light scattering ionization aerosol solar activity ion aeronomy |
spellingShingle |
optics of the atmosphere resonant lidar laser ionozond lidar reflections in the thermosphere coefficient and cross-section of light scattering ionization aerosol solar activity ion aeronomy Boris M. Shevtsov Andrey N. Perezhogin Ilya N. Seredkin Atmospheric Optical Characteristics in the Area of 30–400 km |
topic_facet |
optics of the atmosphere resonant lidar laser ionozond lidar reflections in the thermosphere coefficient and cross-section of light scattering ionization aerosol solar activity ion aeronomy |
description |
Extremely weak lidar reflections in the thermosphere, which correlate with ionosonde data, were detected in 2008 and 2017 over Kamchatka during seasons of low aerosol filling of the atmosphere at solar activity minima. Here, these reflections are considered in comparison with mesospheric and stratospheric lidar signals that makes it possible to determine favorable conditions for thermospheric lidar observations. In 2014, it was shown that lines of transitions between the excited states of atomic nitrogen ions fall within the 532 nm lidar signal emission band, and in 2017, lidar reflections in the thermosphere were simultaneously obtained at 561 and 532 nm excited transitions of atomic oxygen and nitrogen ions, thereby the resonant nature of thermospheric lidar reflections was established and confirmed. Here, using lidar signals at wavelengths of 561 and 532 nm in the altitude range of 30–400 km, by solving the inverse problem, we restore the light scattering coefficients corresponding to these wavelengths that makes it possible to compare the optical characteristics of the thermosphere, mesosphere, and upper stratosphere and to determine the relationship between resonant, Rayleigh, and aerosol light scattering at different heights of the atmosphere. In conclusion, using the scattering coefficients in the thermosphere, we find the cross-sections of light scattering at the 561 and 532 nm transitions of atomic oxygen and nitrogen ions and explain why the scattering coefficients for O+, 561 nm are less than for N+, 532 nm, while the concentration of O+ is two orders of magnitude higher than N+. The results obtained here are of interest for understanding the ionization effect of solar activity on the optical characteristics of the atmosphere that determine weather and climate changes. |
format |
Text |
author |
Boris M. Shevtsov Andrey N. Perezhogin Ilya N. Seredkin |
author_facet |
Boris M. Shevtsov Andrey N. Perezhogin Ilya N. Seredkin |
author_sort |
Boris M. Shevtsov |
title |
Atmospheric Optical Characteristics in the Area of 30–400 km |
title_short |
Atmospheric Optical Characteristics in the Area of 30–400 km |
title_full |
Atmospheric Optical Characteristics in the Area of 30–400 km |
title_fullStr |
Atmospheric Optical Characteristics in the Area of 30–400 km |
title_full_unstemmed |
Atmospheric Optical Characteristics in the Area of 30–400 km |
title_sort |
atmospheric optical characteristics in the area of 30–400 km |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://doi.org/10.3390/rs14236108 |
op_coverage |
agris |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_source |
Remote Sensing; Volume 14; Issue 23; Pages: 6108 |
op_relation |
Atmospheric Remote Sensing https://dx.doi.org/10.3390/rs14236108 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/rs14236108 |
container_title |
Remote Sensing |
container_volume |
14 |
container_issue |
23 |
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6108 |
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1774719484298264576 |