 |
| Titel |
Combined wind measurements by two different lidar instruments in the Arctic middle atmosphere |
| VerfasserIn |
J. Hildebrand, G. Baumgarten, J. Fiedler, U.-P. Hoppe, B. Kaifler, F.-J. Lübken, B. P. Williams |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1867-1381
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 5, no. 10 ; Nr. 5, no. 10 (2012-10-19), S.2433-2445 |
| Datensatznummer |
250003125
|
| Publikation (Nr.) |
 copernicus.org/amt-5-2433-2012.pdf |
|
|
|
|
|
| Zusammenfassung |
| During a joint campaign in January 2009, the Rayleigh/Mie/Raman (RMR) lidar
and the sodium lidar at the ALOMAR Observatory (69° N, 16° E)
in Northern Norway were operated simultaneously for more than 40 h,
collecting data for wind measurements in the middle atmosphere from 30 up to
110 km altitude. As both lidars share the same receiving telescopes, the
upper altitude range of the RMR lidar and the lower altitude range of the
sodium lidar overlap in the altitude region of ≈80–85 km. For
this overlap region we are thus able to present the first simultaneous wind
measurements derived from two different lidar instruments. The comparison of
winds derived by RMR and sodium lidar is excellent for long integration times
of 10 h as well as shorter ones of 1 h. Combination of data from both
lidars allows identifying wavy structures between 30 and 110 km
altitude, whose amplitudes increase with height. We have also performed
vertical wind measurements and measurements of the same horizontal wind
component using two independent lasers and telescopes of the RMR lidar and
show how to use this data to calibrate and validate the wind retrieval. For
the latter configuration we found a good agreement of the results but also
identified inhomogeneities in the horizontal wind at about 55 km altitude of
up to 20 ms−1 for an integration time of nearly 4 h. Such small-scale
inhomogeneities in the horizontal wind field are an essential challenge when
comparing data from different instruments. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|