Seasonal variations of the semi-diurnal and diurnal tides in the MLT: multi-year MF radar observations from 2–70° N, modelled tides (GSWM, CMAM)
In an earlier paper (Manson et al., 1999a) tidal data (1990–1997) from six Medium Frequency Radars (MFR) were compared with the Global Scale Wave Model (GSWM, original 1995 version). The radars are located between the equator and high northern latitudes: Christmas Island (2° N), Hawaii (22° N), Urba...
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ftdoajarticles:oai:doaj.org/article:9cc867a75f494956958d16daa8093787 2023-05-15T18:34:49+02:00 Seasonal variations of the semi-diurnal and diurnal tides in the MLT: multi-year MF radar observations from 2–70° N, modelled tides (GSWM, CMAM) A. H. Manson C. Meek M. Hagan J. Koshyk S. Franke D. Fritts C. Hall W. Hocking K. Igarashi J. MacDougall D. Riggin R. Vincent 2002-05-01T00:00:00Z https://doi.org/10.5194/angeo-20-661-2002 https://doaj.org/article/9cc867a75f494956958d16daa8093787 EN eng Copernicus Publications https://www.ann-geophys.net/20/661/2002/angeo-20-661-2002.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-20-661-2002 0992-7689 1432-0576 https://doaj.org/article/9cc867a75f494956958d16daa8093787 Annales Geophysicae, Vol 20, Pp 661-677 (2002) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2002 ftdoajarticles https://doi.org/10.5194/angeo-20-661-2002 2022-12-31T12:35:11Z In an earlier paper (Manson et al., 1999a) tidal data (1990–1997) from six Medium Frequency Radars (MFR) were compared with the Global Scale Wave Model (GSWM, original 1995 version). The radars are located between the equator and high northern latitudes: Christmas Island (2° N), Hawaii (22° N), Urbana (40° N), London (43° N), Saskatoon (52° N) and Tromsø (70° N). Common harmonic analysis was applied, to ensure consistency of amplitudes and phases in the 75–95 km height range. For the diurnal tide, seasonal agreements between observations and model were excellent while for the semi-diurnal tide the seasonal transitions between clear solstitial states were less well captured by the model. Here the data set is increased by the addition of two locations in the Pacific-North American sector: Yamagawa 31° N, and Wakkanai 45° N. The GSWM model has undergone two additional developments (1998, 2000) to include an improved gravity wave (GW) stress parameterization, background winds from UARS systems and monthly tidal forcing for better characterization of seasonal change. The other model, the Canadian Middle Atmosphere Model (CMAM) which is a General Circulation Model, provides internally generated forcing (due to ozone and water vapour) for the tides. The two GSWM versions show distinct differences, with the 2000 version being either closer to, or further away from, the observations than the original 1995 version. CMAM provides results dependent upon the GW parameterization scheme inserted, but one of the schemes provides very useful tides, especially for the semi-diurnal component. Key words. Meteorology and atmospheric dynamics (middle atmosphere dynamics; waves and tides) Article in Journal/Newspaper Tromsø Directory of Open Access Journals: DOAJ Articles Pacific Tromsø Annales Geophysicae 20 5 661 677 |
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English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 A. H. Manson C. Meek M. Hagan J. Koshyk S. Franke D. Fritts C. Hall W. Hocking K. Igarashi J. MacDougall D. Riggin R. Vincent Seasonal variations of the semi-diurnal and diurnal tides in the MLT: multi-year MF radar observations from 2–70° N, modelled tides (GSWM, CMAM) |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
In an earlier paper (Manson et al., 1999a) tidal data (1990–1997) from six Medium Frequency Radars (MFR) were compared with the Global Scale Wave Model (GSWM, original 1995 version). The radars are located between the equator and high northern latitudes: Christmas Island (2° N), Hawaii (22° N), Urbana (40° N), London (43° N), Saskatoon (52° N) and Tromsø (70° N). Common harmonic analysis was applied, to ensure consistency of amplitudes and phases in the 75–95 km height range. For the diurnal tide, seasonal agreements between observations and model were excellent while for the semi-diurnal tide the seasonal transitions between clear solstitial states were less well captured by the model. Here the data set is increased by the addition of two locations in the Pacific-North American sector: Yamagawa 31° N, and Wakkanai 45° N. The GSWM model has undergone two additional developments (1998, 2000) to include an improved gravity wave (GW) stress parameterization, background winds from UARS systems and monthly tidal forcing for better characterization of seasonal change. The other model, the Canadian Middle Atmosphere Model (CMAM) which is a General Circulation Model, provides internally generated forcing (due to ozone and water vapour) for the tides. The two GSWM versions show distinct differences, with the 2000 version being either closer to, or further away from, the observations than the original 1995 version. CMAM provides results dependent upon the GW parameterization scheme inserted, but one of the schemes provides very useful tides, especially for the semi-diurnal component. Key words. Meteorology and atmospheric dynamics (middle atmosphere dynamics; waves and tides) |
format |
Article in Journal/Newspaper |
author |
A. H. Manson C. Meek M. Hagan J. Koshyk S. Franke D. Fritts C. Hall W. Hocking K. Igarashi J. MacDougall D. Riggin R. Vincent |
author_facet |
A. H. Manson C. Meek M. Hagan J. Koshyk S. Franke D. Fritts C. Hall W. Hocking K. Igarashi J. MacDougall D. Riggin R. Vincent |
author_sort |
A. H. Manson |
title |
Seasonal variations of the semi-diurnal and diurnal tides in the MLT: multi-year MF radar observations from 2–70° N, modelled tides (GSWM, CMAM) |
title_short |
Seasonal variations of the semi-diurnal and diurnal tides in the MLT: multi-year MF radar observations from 2–70° N, modelled tides (GSWM, CMAM) |
title_full |
Seasonal variations of the semi-diurnal and diurnal tides in the MLT: multi-year MF radar observations from 2–70° N, modelled tides (GSWM, CMAM) |
title_fullStr |
Seasonal variations of the semi-diurnal and diurnal tides in the MLT: multi-year MF radar observations from 2–70° N, modelled tides (GSWM, CMAM) |
title_full_unstemmed |
Seasonal variations of the semi-diurnal and diurnal tides in the MLT: multi-year MF radar observations from 2–70° N, modelled tides (GSWM, CMAM) |
title_sort |
seasonal variations of the semi-diurnal and diurnal tides in the mlt: multi-year mf radar observations from 2–70° n, modelled tides (gswm, cmam) |
publisher |
Copernicus Publications |
publishDate |
2002 |
url |
https://doi.org/10.5194/angeo-20-661-2002 https://doaj.org/article/9cc867a75f494956958d16daa8093787 |
geographic |
Pacific Tromsø |
geographic_facet |
Pacific Tromsø |
genre |
Tromsø |
genre_facet |
Tromsø |
op_source |
Annales Geophysicae, Vol 20, Pp 661-677 (2002) |
op_relation |
https://www.ann-geophys.net/20/661/2002/angeo-20-661-2002.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-20-661-2002 0992-7689 1432-0576 https://doaj.org/article/9cc867a75f494956958d16daa8093787 |
op_doi |
https://doi.org/10.5194/angeo-20-661-2002 |
container_title |
Annales Geophysicae |
container_volume |
20 |
container_issue |
5 |
container_start_page |
661 |
op_container_end_page |
677 |
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1766219770782285824 |