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Modelling the desce...
Modelling the descent of nitric oxide during the elevated stratopause event of January 2013
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- Orsolini, Y. J. (författare)
- Norsk institutt for luftforskning (NILU),Norwegian Institute for Air Research (NILU),Universitetet i Bergen,University of Bergen
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- Limpasuvan, V. (författare)
- Coastal Carolina University
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- Perot, Kristell, 1985 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Espy, P. J. (författare)
- Universitetet i Bergen,University of Bergen,Norges teknisk-naturvitenskapelige universitet (NTNU),Norwegian University of Science and Technology (NTNU)
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- Hibbins, Robert (författare)
- Universitetet i Bergen,University of Bergen,Norges teknisk-naturvitenskapelige universitet (NTNU),Norwegian University of Science and Technology (NTNU)
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- Lossow, Stefan, 1977 (författare)
- Karlsruher Institut für Technologie (KIT),Karlsruhe Institute of Technology (KIT)
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- Raaholt Larsson, Katarina (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Murtagh, Donal, 1959 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- Elsevier BV, 2017
- 2017
- Engelska.
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Ingår i: Journal of Atmospheric and Solar-Terrestrial Physics. - : Elsevier BV. - 1364-6826. ; 155, s. 50-61
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Using simulations with a whole-atmosphere chemistry-climate model nudged by meteorological analyses, global satellite observations of nitrogen oxide (NO) and water vapour by the Sub-Millimetre Radiometer instrument (SMR), of temperature by the Microwave Limb Sounder (MLS), as well as local radar observations, this study examines the recent major stratospheric sudden warming accompanied by an elevated stratopause event (ESE) that occurred in January 2013. We examine dynamical processes during the ESE, including the role of planetary wave, gravity wave and tidal forcing on the initiation of the descent in the mesosphere-lower thermosphere (MLT) and its continuation throughout the mesosphere and stratosphere, as well as the impact of model eddy diffusion. We analyse the transport of NO and find the model underestimates the large descent of NO compared to SMR observations. We demonstrate that the discrepancy arises abruptly in the MLT region at a time when the resolved wave forcing and the planetary wave activity increase, just before the elevated stratopause reforms. The discrepancy persists despite doubling the model eddy diffusion. While the simulations reproduce an enhancement of the semi-diurnal tide following the onset of the 2013 SSW, corroborating new meteor radar observations at high northern latitudes over Trondheim (63.4°N), the modelled tidal contribution to the forcing of the mean meridional circulation and to the descent is a small portion of the resolved wave forcing, and lags it by about ten days.
Ämnesord
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Nyckelord
- Stratospheric sudden warming
- Gravity waves
- Middle atmospheric circulation
- Nitric oxide
- Planetary waves
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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- Av författaren/redakt...
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Orsolini, Y. J.
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Limpasuvan, V.
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Perot, Kristell, ...
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Espy, P. J.
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Hibbins, Robert
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Lossow, Stefan, ...
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visa fler...
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Raaholt Larsson, ...
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Murtagh, Donal, ...
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