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Preliminary observations and simulation of nocturnal variations of airglow temperature and emission rates at Pune (18.5°N), India.

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Title: Preliminary observations and simulation of nocturnal variations of airglow temperature and emission rates at Pune (18.5°N), India.
Authors: Fadnavis, S.1 suvarnafadnavis@gmail.com, Feng, W.2,3, Shepherd, Gordon G.4, Plane, J.M.C.2, Sonbawne, S.1, Roy, Chaitri1, Dhomse, S.3, Ghude, S.D.1
Source: Journal of Atmospheric & Solar-Terrestrial Physics. Nov2016, Vol. 149, p59-68. 10p.
Subjects: Atmospheric models, Airglow, Mesosphere, Nocturnal emissions, Atmospheric research
Geographic Terms: Pune (India)
Abstract: Preliminary observations of the nocturnal variations of the OH(6-2) and O2b(0-1) nighttime airglow in the mesosphere and lower thermosphere are investigated in the context of tidal influence for the tropical latitude station Pune (18.5°N, 73.85°E). This is the only tropical Spectral Airglow Temperature Imager (SATI) station where the tidal variations of mesosphere and lower thermosphere (MLT) temperature have been determined from ground based SATI observations. The SATI observations obtained since October 2012 reveal the influence of the migrating semidiurnal tides during solstice at this tropical station. There is variability in amplitude and phase obtained from SATI observations. In this paper, SATI observations on 10 Dec 2012 and 3 March 2013 are compared with Whole Atmosphere Community Climate Model (WACCM) simulations. The amplitude of semidiurnal tides is ~25 K/30 K on 10 Dec 2012 during solstice for OH/O 2 temperature. During equinox SATI data indicates existence of semidiurnal tide also. The airglow observations are compared with simulations from the WACCM. The model underestimates the amplitude of the semi diurnal tide during equinox (1.6 K/2.7 K at 87 km/96 km) and solstice (~3.8 K/4.8 K at 87 km/96 km) for these days. The reason may be related to dampening of tides in the model due to the effect of strong latitudinal shear in zonal wind. The diurnal variation of airglow emission – which the model simulates well – is related to the vertical advection associated with the tides and downward mixing of atomic oxygen. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Atmospheric & Solar-Terrestrial Physics is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 119441452
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  Data: Preliminary observations and simulation of nocturnal variations of airglow temperature and emission rates at Pune (18.5°N), India.
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  Data: <searchLink fieldCode="AR" term="%22Fadnavis%2C+S%2E%22">Fadnavis, S.</searchLink><relatesTo>1</relatesTo><i> suvarnafadnavis@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Feng%2C+W%2E%22">Feng, W.</searchLink><relatesTo>2,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Shepherd%2C+Gordon+G%2E%22">Shepherd, Gordon G.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Plane%2C+J%2EM%2EC%2E%22">Plane, J.M.C.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Sonbawne%2C+S%2E%22">Sonbawne, S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Roy%2C+Chaitri%22">Roy, Chaitri</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Dhomse%2C+S%2E%22">Dhomse, S.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Ghude%2C+S%2ED%2E%22">Ghude, S.D.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Atmospheric+%26+Solar-Terrestrial+Physics%22">Journal of Atmospheric & Solar-Terrestrial Physics</searchLink>. Nov2016, Vol. 149, p59-68. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Atmospheric+models%22">Atmospheric models</searchLink><br /><searchLink fieldCode="DE" term="%22Airglow%22">Airglow</searchLink><br /><searchLink fieldCode="DE" term="%22Mesosphere%22">Mesosphere</searchLink><br /><searchLink fieldCode="DE" term="%22Nocturnal+emissions%22">Nocturnal emissions</searchLink><br /><searchLink fieldCode="DE" term="%22Atmospheric+research%22">Atmospheric research</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22Pune+%28India%29%22">Pune (India)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Preliminary observations of the nocturnal variations of the OH(6-2) and O2b(0-1) nighttime airglow in the mesosphere and lower thermosphere are investigated in the context of tidal influence for the tropical latitude station Pune (18.5°N, 73.85°E). This is the only tropical Spectral Airglow Temperature Imager (SATI) station where the tidal variations of mesosphere and lower thermosphere (MLT) temperature have been determined from ground based SATI observations. The SATI observations obtained since October 2012 reveal the influence of the migrating semidiurnal tides during solstice at this tropical station. There is variability in amplitude and phase obtained from SATI observations. In this paper, SATI observations on 10 Dec 2012 and 3 March 2013 are compared with Whole Atmosphere Community Climate Model (WACCM) simulations. The amplitude of semidiurnal tides is ~25 K/30 K on 10 Dec 2012 during solstice for OH/O 2 temperature. During equinox SATI data indicates existence of semidiurnal tide also. The airglow observations are compared with simulations from the WACCM. The model underestimates the amplitude of the semi diurnal tide during equinox (1.6 K/2.7 K at 87 km/96 km) and solstice (~3.8 K/4.8 K at 87 km/96 km) for these days. The reason may be related to dampening of tides in the model due to the effect of strong latitudinal shear in zonal wind. The diurnal variation of airglow emission – which the model simulates well – is related to the vertical advection associated with the tides and downward mixing of atomic oxygen. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Atmospheric & Solar-Terrestrial Physics is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.jastp.2016.10.002
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 10
        StartPage: 59
    Subjects:
      – SubjectFull: Atmospheric models
        Type: general
      – SubjectFull: Airglow
        Type: general
      – SubjectFull: Mesosphere
        Type: general
      – SubjectFull: Nocturnal emissions
        Type: general
      – SubjectFull: Atmospheric research
        Type: general
      – SubjectFull: Pune (India)
        Type: general
    Titles:
      – TitleFull: Preliminary observations and simulation of nocturnal variations of airglow temperature and emission rates at Pune (18.5°N), India.
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              M: 11
              Text: Nov2016
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              Y: 2016
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