 |
| Titel |
Cyclones causing wind storms in the Mediterranean: characteristics, trends and links to large-scale patterns |
| VerfasserIn |
K. M. Nissen, G. C. Leckebusch, J. G. Pinto, D. Renggli, S. Ulbrich, U. Ulbrich |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1561-8633
|
| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 10, no. 7 ; Nr. 10, no. 7 (2010-07-01), S.1379-1391 |
| Datensatznummer |
250008299
|
| Publikation (Nr.) |
 copernicus.org/nhess-10-1379-2010.pdf |
|
|
|
|
|
| Zusammenfassung |
A climatology of cyclones with a focus on their relation to wind storm tracks
in the Mediterranean region (MR) is presented. Trends in the frequency of
cyclones and wind storms, as well as variations associated with the North
Atlantic Oscillation (NAO), the East Atlantic/West Russian (EAWR) and the
Scandinavian variability pattern (SCAND) are discussed.
The study is based on the ERA40 reanalysis dataset. Wind storm tracks are
identified by tracking clusters of adjacent grid boxes characterised by
extremely high local wind speeds. The wind track is assigned to a cyclone
track independently identified with an objective scheme.
Areas with high wind activity – quantified by extreme wind tracks
– are typically located south of the Golf of Genoa, south of
Cyprus, southeast of Sicily and west of the Iberian Peninsula. About
69% of the wind storms are caused by cyclones located in the
Mediterranean region, while the remaining 31% can be attributed to
North Atlantic or Northern European cyclones.
The North Atlantic Oscillation, the East Atlantic/West Russian pattern and
the Scandinavian pattern all influence the amount and spatial distribution of
wind inducing cyclones and wind events in the MR. The strongest signals exist
for the NAO and the EAWR pattern, which are both associated with an increase
in the number of organised strong wind events in the eastern MR during their
positive phase. On the other hand, the storm numbers decrease over the
western MR for the positive phase of the NAO and over the central MR during
the positive phase of the EAWR pattern. The positive phase of the
Scandinavian pattern is associated with a decrease in the number of winter
wind storms over most of the MR.
A third of the trends in the number of wind storms and wind producing
cyclones during the winter season of the ERA40 period may be attributed to
the variability of the North Atlantic Oscillation. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|