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 radar...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2017-07-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/35/893/2017/angeo-35-893-2017.pdf |
| _version_ | 1819195293988552704 |
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| author | S. Wilhelm G. Stober J. L. Chau |
| author_facet | S. Wilhelm G. Stober J. L. Chau |
| author_sort | S. Wilhelm |
| collection | DOAJ |
| 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.
<br><br>
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. |
| first_indexed | 2024-12-23T02:10:28Z |
| format | Article |
| id | doaj.art-c55682d701164d39b82398ccf49f4fad |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-23T02:10:28Z |
| publishDate | 2017-07-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-c55682d701164d39b82398ccf49f4fad2022-12-21T18:03:47ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762017-07-013589390610.5194/angeo-35-893-2017A comparison of 11-year mesospheric and lower thermospheric winds determined by meteor and MF radar at 69 ° NS. Wilhelm0G. Stober1J. L. Chau2Leibniz Institute of Atmospheric Physics at the University of Rostock, Kühlungsborn, GermanyLeibniz Institute of Atmospheric Physics at the University of Rostock, Kühlungsborn, GermanyLeibniz Institute of Atmospheric Physics at the University of Rostock, Kühlungsborn, GermanyThe 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. <br><br> 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.https://www.ann-geophys.net/35/893/2017/angeo-35-893-2017.pdf |
| spellingShingle | S. Wilhelm G. Stober J. L. Chau A comparison of 11-year mesospheric and lower thermospheric winds determined by meteor and MF radar at 69 ° N Annales Geophysicae |
| title | 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_short | 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 |
| url | https://www.ann-geophys.net/35/893/2017/angeo-35-893-2017.pdf |
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