Fadnavis, S, Feng, W orcid.org/0000-0002-9907-9120, Shepherd, GG et al. (5 more authors) (2016) Preliminary observations and simulation of nocturnal variations of airglow temperature and emission rates at Pune (18.5°N), India. Journal of Atmospheric and Solar-Terrestrial Physics, 149. pp. 59-68. ISSN 1364-6826
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 (18.5ON, 73.85OE). 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 3March 2013 are compared with Whole Atmosphere Community Climate Model (WACCM) simulations. The amplitude of semidiurnal tides is ~25K/30K on 10 Dec 2012 during solstice for OH/O2 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/4.8K 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.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 Elsevier Ltd. All rights reserved. This is an author produced version of a paper published in Journal of Atmospheric and Solar-Terrestrial Physics. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Spectral airglow, mesosphere, temperature, Whole Atmosphere Community Climate Model (WACCM) |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst for Climate & Atmos Science (ICAS) (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) > Physical Chemistry (Leeds) |
Funding Information: | Funder Grant number EU - European Union 291332 |
Depositing User: | Symplectic Publications |
Date Deposited: | 06 Oct 2016 08:24 |
Last Modified: | 05 Oct 2017 14:04 |
Published Version: | https://doi.org/10.1016/j.jastp.2016.10.002 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.jastp.2016.10.002 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:105525 |