Estimates of vertical eddy diffusivity in the upper mesosphere in the presence of a mesospheric inversion layer
Rayleigh and resonance lidar observations were made during the Turbopause experiment at Poker Flat Research Range, Chatanika Alaska (65° N, 147° W) over a 10 h period on the night of 17–18 February 2009. The lidar observations revealed the presence of a strong mesospheric inversion layer (MIL) at 74...
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2011
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00026565 2023-05-15T15:09:23+02:00 Estimates of vertical eddy diffusivity in the upper mesosphere in the presence of a mesospheric inversion layer Collins, R. L. Lehmacher, G. A. Larsen, M. F. Mizutani, K. 2011-11 electronic https://doi.org/10.5194/angeo-29-2019-2011 https://noa.gwlb.de/receive/cop_mods_00026565 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00026520/angeo-29-2019-2011.pdf https://angeo.copernicus.org/articles/29/2019/2011/angeo-29-2019-2011.pdf eng eng Copernicus Publications Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-29-2019-2011 https://noa.gwlb.de/receive/cop_mods_00026565 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00026520/angeo-29-2019-2011.pdf https://angeo.copernicus.org/articles/29/2019/2011/angeo-29-2019-2011.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2011 ftnonlinearchiv https://doi.org/10.5194/angeo-29-2019-2011 2022-02-08T22:49:10Z Rayleigh and resonance lidar observations were made during the Turbopause experiment at Poker Flat Research Range, Chatanika Alaska (65° N, 147° W) over a 10 h period on the night of 17–18 February 2009. The lidar observations revealed the presence of a strong mesospheric inversion layer (MIL) at 74 km that formed during the observations and was present for over 6 h. The MIL had a maximum temperature of 251 K, amplitude of 27 ± 7 K, a depth of 3.0 km, and overlying lapse rate of 9.4 ± 0.3 K km−1. The MIL was located at the lower edge of the mesospheric sodium layer. During this coincidence the lower edge of the sodium layer was lowered by 2 km to 74 km and the bottomside scale height of the sodium increased from 1 km to 15 km. The structure of the MIL and sodium are analyzed in terms of vertical diffusive transport. The analysis yields a lower bound for the eddy diffusion coefficient of 430 m2 s−1 and the energy dissipation rate of 2.2 mW kg−1 at 76–77 km. This value of the eddy diffusion coefficient, determined from naturally occurring variations in mesospheric temperatures and the sodium layer, is significantly larger than those reported for mean winter values in the Arctic but similar to individual values reported in regions of convective instability by other techniques. Article in Journal/Newspaper Arctic Alaska Niedersächsisches Online-Archiv NOA Arctic Annales Geophysicae 29 11 2019 2029 |
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Niedersächsisches Online-Archiv NOA |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Collins, R. L. Lehmacher, G. A. Larsen, M. F. Mizutani, K. Estimates of vertical eddy diffusivity in the upper mesosphere in the presence of a mesospheric inversion layer |
topic_facet |
article Verlagsveröffentlichung |
description |
Rayleigh and resonance lidar observations were made during the Turbopause experiment at Poker Flat Research Range, Chatanika Alaska (65° N, 147° W) over a 10 h period on the night of 17–18 February 2009. The lidar observations revealed the presence of a strong mesospheric inversion layer (MIL) at 74 km that formed during the observations and was present for over 6 h. The MIL had a maximum temperature of 251 K, amplitude of 27 ± 7 K, a depth of 3.0 km, and overlying lapse rate of 9.4 ± 0.3 K km−1. The MIL was located at the lower edge of the mesospheric sodium layer. During this coincidence the lower edge of the sodium layer was lowered by 2 km to 74 km and the bottomside scale height of the sodium increased from 1 km to 15 km. The structure of the MIL and sodium are analyzed in terms of vertical diffusive transport. The analysis yields a lower bound for the eddy diffusion coefficient of 430 m2 s−1 and the energy dissipation rate of 2.2 mW kg−1 at 76–77 km. This value of the eddy diffusion coefficient, determined from naturally occurring variations in mesospheric temperatures and the sodium layer, is significantly larger than those reported for mean winter values in the Arctic but similar to individual values reported in regions of convective instability by other techniques. |
format |
Article in Journal/Newspaper |
author |
Collins, R. L. Lehmacher, G. A. Larsen, M. F. Mizutani, K. |
author_facet |
Collins, R. L. Lehmacher, G. A. Larsen, M. F. Mizutani, K. |
author_sort |
Collins, R. L. |
title |
Estimates of vertical eddy diffusivity in the upper mesosphere in the presence of a mesospheric inversion layer |
title_short |
Estimates of vertical eddy diffusivity in the upper mesosphere in the presence of a mesospheric inversion layer |
title_full |
Estimates of vertical eddy diffusivity in the upper mesosphere in the presence of a mesospheric inversion layer |
title_fullStr |
Estimates of vertical eddy diffusivity in the upper mesosphere in the presence of a mesospheric inversion layer |
title_full_unstemmed |
Estimates of vertical eddy diffusivity in the upper mesosphere in the presence of a mesospheric inversion layer |
title_sort |
estimates of vertical eddy diffusivity in the upper mesosphere in the presence of a mesospheric inversion layer |
publisher |
Copernicus Publications |
publishDate |
2011 |
url |
https://doi.org/10.5194/angeo-29-2019-2011 https://noa.gwlb.de/receive/cop_mods_00026565 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00026520/angeo-29-2019-2011.pdf https://angeo.copernicus.org/articles/29/2019/2011/angeo-29-2019-2011.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Alaska |
genre_facet |
Arctic Alaska |
op_relation |
Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-29-2019-2011 https://noa.gwlb.de/receive/cop_mods_00026565 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00026520/angeo-29-2019-2011.pdf https://angeo.copernicus.org/articles/29/2019/2011/angeo-29-2019-2011.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/angeo-29-2019-2011 |
container_title |
Annales Geophysicae |
container_volume |
29 |
container_issue |
11 |
container_start_page |
2019 |
op_container_end_page |
2029 |
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1766340585666379776 |