 |
| Titel |
Humidity observations in the Arctic troposphere over Ny-Ålesund, Svalbard based on 15 years of radiosonde data |
| VerfasserIn |
R. Treffeisen, R. Krejci, J. Ström, A. C. Engvall, A. Herber, L. Thomason |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 7, no. 10 ; Nr. 7, no. 10 (2007-05-24), S.2721-2732 |
| Datensatznummer |
250004998
|
| Publikation (Nr.) |
 copernicus.org/acp-7-2721-2007.pdf |
|
|
|
|
|
| Zusammenfassung |
| Water vapour is an important component in the radiative balance of the polar
atmosphere. We present a study covering fifteen years of data of
tropospheric humidity profiles measured with standard radiosondes at
Ny-Ålesund (78°55' N 11°52' E) during the period from 1991 to
2006. It is well-known that relative humidity measurements are less reliable
at low temperatures when measured with standard radiosondes. The data was
corrected for errors and used to determine key characteristic features of
the vertical and temporal relative humidity evolution in the Arctic
troposphere over Ny-Ålesund. We present frequencies of occurrence of
ice-supersaturation layers in the troposphere, their vertical span,
temperature and statistical distribution. Supersaturation with respect to
ice shows a clear seasonal behaviour. In winter, (October–February) it
occurred in 19% of all cases and less frequently in spring (March–May
12%), and summer (June–September, 9%). Finally, the results are
compared with findings from the SAGE II satellite instrument on subvisible
clouds. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|