Global observations of the 630-nm nightglow and patterns of brightness measured by ISUAL

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Abstract

This study investigates the distributions and occurrence mechanisms of the global local-midnight airglow brightness through FORMOSAT-2/ISUAL satellite imaging observations. We focus on the OI 630.0 nm nightglow emission at altitudes of ~250 km along equatorial space. The database used in this study included data from 2007 to 2008 under solar minimum conditions. The data were classified into four specified types in the statistical study. We found that the occurrence of equatorial brightness was often in the vicinity of the geographic equator and mostly at equinoxes with a tendency to move toward the summer hemisphere as the season changes. Conjugate brightness occurring simultaneously on both sides of the geomagnetic equator was observed predominantly in the northern winter. Furthermore, midnight brightness appeared to have lower luminosity from May to July. We suggest that the global midnight brightness associated with the locations and seasons was the result of several effects which include the influence of the thermospheric midnight temperature maximum (MTM), summerto- winter neutral wind, and ionospheric anomalies.

Original languageEnglish
Pages (from-to)283-293
Number of pages11
JournalTerrestrial, Atmospheric and Oceanic Sciences
Volume24
Issue number2
DOIs
Publication statusPublished - 2013 Jan 1

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nightglow
airglow
winter
anomaly
summer
temperature
FORMOSAT
luminosity
distribution
effect

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)

Cite this

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title = "Global observations of the 630-nm nightglow and patterns of brightness measured by ISUAL",
abstract = "This study investigates the distributions and occurrence mechanisms of the global local-midnight airglow brightness through FORMOSAT-2/ISUAL satellite imaging observations. We focus on the OI 630.0 nm nightglow emission at altitudes of ~250 km along equatorial space. The database used in this study included data from 2007 to 2008 under solar minimum conditions. The data were classified into four specified types in the statistical study. We found that the occurrence of equatorial brightness was often in the vicinity of the geographic equator and mostly at equinoxes with a tendency to move toward the summer hemisphere as the season changes. Conjugate brightness occurring simultaneously on both sides of the geomagnetic equator was observed predominantly in the northern winter. Furthermore, midnight brightness appeared to have lower luminosity from May to July. We suggest that the global midnight brightness associated with the locations and seasons was the result of several effects which include the influence of the thermospheric midnight temperature maximum (MTM), summerto- winter neutral wind, and ionospheric anomalies.",
author = "Chiang, {Chih Yu} and Chang, {Tzu Fang} and Tam, {Sunny Wing Yee} and Huang, {Tai Yin} and Chen, {Alfred Bing Chih} and Su, {Han Tzong} and Hsu, {Rue Ron}",
year = "2013",
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TY - JOUR

T1 - Global observations of the 630-nm nightglow and patterns of brightness measured by ISUAL

AU - Chiang, Chih Yu

AU - Chang, Tzu Fang

AU - Tam, Sunny Wing Yee

AU - Huang, Tai Yin

AU - Chen, Alfred Bing Chih

AU - Su, Han Tzong

AU - Hsu, Rue Ron

PY - 2013/1/1

Y1 - 2013/1/1

N2 - This study investigates the distributions and occurrence mechanisms of the global local-midnight airglow brightness through FORMOSAT-2/ISUAL satellite imaging observations. We focus on the OI 630.0 nm nightglow emission at altitudes of ~250 km along equatorial space. The database used in this study included data from 2007 to 2008 under solar minimum conditions. The data were classified into four specified types in the statistical study. We found that the occurrence of equatorial brightness was often in the vicinity of the geographic equator and mostly at equinoxes with a tendency to move toward the summer hemisphere as the season changes. Conjugate brightness occurring simultaneously on both sides of the geomagnetic equator was observed predominantly in the northern winter. Furthermore, midnight brightness appeared to have lower luminosity from May to July. We suggest that the global midnight brightness associated with the locations and seasons was the result of several effects which include the influence of the thermospheric midnight temperature maximum (MTM), summerto- winter neutral wind, and ionospheric anomalies.

AB - This study investigates the distributions and occurrence mechanisms of the global local-midnight airglow brightness through FORMOSAT-2/ISUAL satellite imaging observations. We focus on the OI 630.0 nm nightglow emission at altitudes of ~250 km along equatorial space. The database used in this study included data from 2007 to 2008 under solar minimum conditions. The data were classified into four specified types in the statistical study. We found that the occurrence of equatorial brightness was often in the vicinity of the geographic equator and mostly at equinoxes with a tendency to move toward the summer hemisphere as the season changes. Conjugate brightness occurring simultaneously on both sides of the geomagnetic equator was observed predominantly in the northern winter. Furthermore, midnight brightness appeared to have lower luminosity from May to July. We suggest that the global midnight brightness associated with the locations and seasons was the result of several effects which include the influence of the thermospheric midnight temperature maximum (MTM), summerto- winter neutral wind, and ionospheric anomalies.

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JO - Terrestrial, Atmospheric and Oceanic Sciences

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