A comparison of 11-year mesospheric and lower thermospheric winds determined by meteor and MF radar at 69 ° N
The Andenes Meteor Radar (MR) and the Saura Medium Frequency (MF) Radar are located in northern Norway (69° N, 16° E) and operate continuously to provide wind measurements of the mesosphere and lower thermosphere (MLT) region. We compare the two systems to find potential biases between the radars an...
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ftcopernicus:oai:publications.copernicus.org:angeo57351 2023-05-15T13:25:22+02:00 A comparison of 11-year mesospheric and lower thermospheric winds determined by meteor and MF radar at 69 ° N Wilhelm, Sven Stober, Gunter Chau, Jorge L. 2018-09-27 application/pdf https://doi.org/10.5194/angeo-35-893-2017 https://angeo.copernicus.org/articles/35/893/2017/ eng eng doi:10.5194/angeo-35-893-2017 https://angeo.copernicus.org/articles/35/893/2017/ eISSN: 1432-0576 Text 2018 ftcopernicus https://doi.org/10.5194/angeo-35-893-2017 2020-07-20T16:23:38Z The Andenes Meteor Radar (MR) and the Saura Medium Frequency (MF) Radar are located in northern Norway (69° N, 16° E) and operate continuously to provide wind measurements of the mesosphere and lower thermosphere (MLT) region. We compare the two systems to find potential biases between the radars and combine the data from both systems to enhance altitudinal coverage between 60 and 110 km. The systems have altitudinal overlap between 78 and 100 km at which we compare winds and tides on the basis of hourly winds with 2 km altitude bins. Our results indicate reasonable agreement for the zonal and meridional wind components between 78 and 92 km. An exception to this is the altitude range below 84 km during the summer, at which the correlation decreases. We also compare semidiurnal and diurnal tides according to their amplitudes and phases with good agreement below 90 km for the diurnal and below 96 km for the semidiurnal tides. Based on these findings we have taken the MR data as a reference. By comparing the MF and MR winds within the overlapping region, we have empirically estimated correction factors to be applied to the MF winds. Existing gaps in that data set will be filled with weighted MF data. This weighting is done due to underestimated wind values of the MF compared to the MR, and the resulting correction factors fit to a polynomial function of second degree within the overlapping area. We are therefore able to construct a consistent and homogenous wind from approximately 60 to 110 km. Text Andenes Northern Norway Copernicus Publications: E-Journals Norway Saura ENVELOPE(12.989,12.989,66.233,66.233) Annales Geophysicae 35 4 893 906 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
The Andenes Meteor Radar (MR) and the Saura Medium Frequency (MF) Radar are located in northern Norway (69° N, 16° E) and operate continuously to provide wind measurements of the mesosphere and lower thermosphere (MLT) region. We compare the two systems to find potential biases between the radars and combine the data from both systems to enhance altitudinal coverage between 60 and 110 km. The systems have altitudinal overlap between 78 and 100 km at which we compare winds and tides on the basis of hourly winds with 2 km altitude bins. Our results indicate reasonable agreement for the zonal and meridional wind components between 78 and 92 km. An exception to this is the altitude range below 84 km during the summer, at which the correlation decreases. We also compare semidiurnal and diurnal tides according to their amplitudes and phases with good agreement below 90 km for the diurnal and below 96 km for the semidiurnal tides. Based on these findings we have taken the MR data as a reference. By comparing the MF and MR winds within the overlapping region, we have empirically estimated correction factors to be applied to the MF winds. Existing gaps in that data set will be filled with weighted MF data. This weighting is done due to underestimated wind values of the MF compared to the MR, and the resulting correction factors fit to a polynomial function of second degree within the overlapping area. We are therefore able to construct a consistent and homogenous wind from approximately 60 to 110 km. |
format |
Text |
author |
Wilhelm, Sven Stober, Gunter Chau, Jorge L. |
spellingShingle |
Wilhelm, Sven Stober, Gunter Chau, Jorge L. A comparison of 11-year mesospheric and lower thermospheric winds determined by meteor and MF radar at 69 ° N |
author_facet |
Wilhelm, Sven Stober, Gunter Chau, Jorge L. |
author_sort |
Wilhelm, Sven |
title |
A comparison of 11-year mesospheric and lower thermospheric winds determined by meteor and MF radar at 69 ° N |
title_short |
A comparison of 11-year mesospheric and lower thermospheric winds determined by meteor and MF radar at 69 ° N |
title_full |
A comparison of 11-year mesospheric and lower thermospheric winds determined by meteor and MF radar at 69 ° N |
title_fullStr |
A comparison of 11-year mesospheric and lower thermospheric winds determined by meteor and MF radar at 69 ° N |
title_full_unstemmed |
A comparison of 11-year mesospheric and lower thermospheric winds determined by meteor and MF radar at 69 ° N |
title_sort |
comparison of 11-year mesospheric and lower thermospheric winds determined by meteor and mf radar at 69 ° n |
publishDate |
2018 |
url |
https://doi.org/10.5194/angeo-35-893-2017 https://angeo.copernicus.org/articles/35/893/2017/ |
long_lat |
ENVELOPE(12.989,12.989,66.233,66.233) |
geographic |
Norway Saura |
geographic_facet |
Norway Saura |
genre |
Andenes Northern Norway |
genre_facet |
Andenes Northern Norway |
op_source |
eISSN: 1432-0576 |
op_relation |
doi:10.5194/angeo-35-893-2017 https://angeo.copernicus.org/articles/35/893/2017/ |
op_doi |
https://doi.org/10.5194/angeo-35-893-2017 |
container_title |
Annales Geophysicae |
container_volume |
35 |
container_issue |
4 |
container_start_page |
893 |
op_container_end_page |
906 |
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1766384925333782528 |