Temperature tides determined with meteor radar
International audience 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 (19...
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ftccsdartic:oai:HAL:hal-00317146v1 2023-11-12T04:25:17+01:00 Temperature tides determined with meteor radar Hocking, W. K. Hocking, A. Department of Physics and Astronomy London, ON University of Western Ontario (UWO) Mardoc Inc. London 2002 https://hal.science/hal-00317146 https://hal.science/hal-00317146/document https://hal.science/hal-00317146/file/angeo-20-1447-2002.pdf en eng HAL CCSD European Geosciences Union hal-00317146 https://hal.science/hal-00317146 https://hal.science/hal-00317146/document https://hal.science/hal-00317146/file/angeo-20-1447-2002.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00317146 Annales Geophysicae, 2002, 20 (9), pp.1447-1467 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2002 ftccsdartic 2023-10-21T23:07:42Z International audience 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 ... Article in Journal/Newspaper Resolute Bay Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Canada Resolute Bay ENVELOPE(-94.842,-94.842,74.677,74.677) Hagan ENVELOPE(9.044,9.044,62.575,62.575) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Hocking, W. K. Hocking, A. Temperature tides determined with meteor radar |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience 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 ... |
author2 |
Department of Physics and Astronomy London, ON University of Western Ontario (UWO) Mardoc Inc. London |
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 |
HAL CCSD |
publishDate |
2002 |
url |
https://hal.science/hal-00317146 https://hal.science/hal-00317146/document https://hal.science/hal-00317146/file/angeo-20-1447-2002.pdf |
long_lat |
ENVELOPE(-94.842,-94.842,74.677,74.677) ENVELOPE(9.044,9.044,62.575,62.575) |
geographic |
Canada Resolute Bay Hagan |
geographic_facet |
Canada Resolute Bay Hagan |
genre |
Resolute Bay |
genre_facet |
Resolute Bay |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00317146 Annales Geophysicae, 2002, 20 (9), pp.1447-1467 |
op_relation |
hal-00317146 https://hal.science/hal-00317146 https://hal.science/hal-00317146/document https://hal.science/hal-00317146/file/angeo-20-1447-2002.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782339580673916928 |