Temperature tides determined with meteor radar
A new analysis method for producing tidal temperature parameters using meteor radar measurements is presented, and is demonstrated with data from one polar and two mid-latitude sites. The technique further develops the temperature algorithm originally introduced by Hocking (1999). That earlier metho...
Published in: | Annales Geophysicae |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2002
|
Subjects: | |
Online Access: | https://doi.org/10.5194/angeo-20-1447-2002 https://noa.gwlb.de/receive/cop_mods_00035876 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00035830/angeo-20-1447-2002.pdf https://angeo.copernicus.org/articles/20/1447/2002/angeo-20-1447-2002.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00035876 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00035876 2023-05-15T18:06:51+02:00 Temperature tides determined with meteor radar Hocking, W. K. Hocking, A. 2002-09 electronic https://doi.org/10.5194/angeo-20-1447-2002 https://noa.gwlb.de/receive/cop_mods_00035876 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00035830/angeo-20-1447-2002.pdf https://angeo.copernicus.org/articles/20/1447/2002/angeo-20-1447-2002.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-20-1447-2002 https://noa.gwlb.de/receive/cop_mods_00035876 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00035830/angeo-20-1447-2002.pdf https://angeo.copernicus.org/articles/20/1447/2002/angeo-20-1447-2002.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2002 ftnonlinearchiv https://doi.org/10.5194/angeo-20-1447-2002 2022-02-08T22:44:20Z A new analysis method for producing tidal temperature parameters using meteor radar measurements is presented, and is demonstrated with data from one polar and two mid-latitude sites. The technique further develops the temperature algorithm originally introduced by Hocking (1999). That earlier method was used to produce temperature measurements over time scales of days and months, but required an empirical model for the mean temperature gradient in the mesopause region. However, when tides are present, this temperature gradient is modulated by the presence of the tides, complicating extraction of diurnal variations. Nevertheless, if the vertical wavelengths of the tides are known from wind measurements, the effects of the gradient variations can be compensated for, permitting determination of temperature tidal amplitudes and phases by meteor techniques. The basic theory is described, and results from meteor radars at Resolute Bay (Canada), London (Canada) and Albuquerque (New Mexico, USA) are shown. Our results are compared with other lidar data, computer models, fundamental tidal theory and rocket data. Phase measurements at two mid-latitude sites (Albuquerque, New Mexico, and London, Canada) show times of maximum for the diurnal temperature tide to change modestly throughout most of the year, varying generally between 0 h and 6 h, with an excursion to 12 h in June at London. The semidiurnal tide shows a larger annual variation in time of maximum, being at 2–4 h in the winter months but increasing to 9 h during the late summer and early fall. We also find that, at least at mid-latitudes, the phase of the temperature tide matches closely the phase of the meridional tide, and theoretical justification for this statement is given. We also demonstrate that this is true using the Global Scale Wave Model (Hagan et al., 1999). Median values for the temperature amplitudes for each site are in the range 5 to 6 Kelvin. Results from a more northern site (Resolute Bay) show less consistency between the wind tides and the temperature tides, supporting suggestions that the temperature tides may be zonally symmetric at these high latitudes (e.g. Walterscheid and Sivjee, 2001). Key words. Meteorology and atmospheric dynamics (middle atmosphere dynamics; waves and tides) – Radio science (signal processing) Article in Journal/Newspaper Resolute Bay Niedersächsisches Online-Archiv NOA Canada Hagan ENVELOPE(9.044,9.044,62.575,62.575) Resolute Bay ENVELOPE(-94.842,-94.842,74.677,74.677) Annales Geophysicae 20 9 1447 1467 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Hocking, W. K. Hocking, A. Temperature tides determined with meteor radar |
topic_facet |
article Verlagsveröffentlichung |
description |
A new analysis method for producing tidal temperature parameters using meteor radar measurements is presented, and is demonstrated with data from one polar and two mid-latitude sites. The technique further develops the temperature algorithm originally introduced by Hocking (1999). That earlier method was used to produce temperature measurements over time scales of days and months, but required an empirical model for the mean temperature gradient in the mesopause region. However, when tides are present, this temperature gradient is modulated by the presence of the tides, complicating extraction of diurnal variations. Nevertheless, if the vertical wavelengths of the tides are known from wind measurements, the effects of the gradient variations can be compensated for, permitting determination of temperature tidal amplitudes and phases by meteor techniques. The basic theory is described, and results from meteor radars at Resolute Bay (Canada), London (Canada) and Albuquerque (New Mexico, USA) are shown. Our results are compared with other lidar data, computer models, fundamental tidal theory and rocket data. Phase measurements at two mid-latitude sites (Albuquerque, New Mexico, and London, Canada) show times of maximum for the diurnal temperature tide to change modestly throughout most of the year, varying generally between 0 h and 6 h, with an excursion to 12 h in June at London. The semidiurnal tide shows a larger annual variation in time of maximum, being at 2–4 h in the winter months but increasing to 9 h during the late summer and early fall. We also find that, at least at mid-latitudes, the phase of the temperature tide matches closely the phase of the meridional tide, and theoretical justification for this statement is given. We also demonstrate that this is true using the Global Scale Wave Model (Hagan et al., 1999). Median values for the temperature amplitudes for each site are in the range 5 to 6 Kelvin. Results from a more northern site (Resolute Bay) show less consistency between the wind tides and the temperature tides, supporting suggestions that the temperature tides may be zonally symmetric at these high latitudes (e.g. Walterscheid and Sivjee, 2001). Key words. Meteorology and atmospheric dynamics (middle atmosphere dynamics; waves and tides) – Radio science (signal processing) |
format |
Article in Journal/Newspaper |
author |
Hocking, W. K. Hocking, A. |
author_facet |
Hocking, W. K. Hocking, A. |
author_sort |
Hocking, W. K. |
title |
Temperature tides determined with meteor radar |
title_short |
Temperature tides determined with meteor radar |
title_full |
Temperature tides determined with meteor radar |
title_fullStr |
Temperature tides determined with meteor radar |
title_full_unstemmed |
Temperature tides determined with meteor radar |
title_sort |
temperature tides determined with meteor radar |
publisher |
Copernicus Publications |
publishDate |
2002 |
url |
https://doi.org/10.5194/angeo-20-1447-2002 https://noa.gwlb.de/receive/cop_mods_00035876 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00035830/angeo-20-1447-2002.pdf https://angeo.copernicus.org/articles/20/1447/2002/angeo-20-1447-2002.pdf |
long_lat |
ENVELOPE(9.044,9.044,62.575,62.575) ENVELOPE(-94.842,-94.842,74.677,74.677) |
geographic |
Canada Hagan Resolute Bay |
geographic_facet |
Canada Hagan Resolute Bay |
genre |
Resolute Bay |
genre_facet |
Resolute Bay |
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-20-1447-2002 https://noa.gwlb.de/receive/cop_mods_00035876 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00035830/angeo-20-1447-2002.pdf https://angeo.copernicus.org/articles/20/1447/2002/angeo-20-1447-2002.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/angeo-20-1447-2002 |
container_title |
Annales Geophysicae |
container_volume |
20 |
container_issue |
9 |
container_start_page |
1447 |
op_container_end_page |
1467 |
_version_ |
1766178556537208832 |