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| Content Provider | Springer Nature Link |
|---|---|
| Author | rrant Romand, Caroline Douguédroit, Annick |
| Copyright Year | 2013 |
| Abstract | This paper aims at identifying the link between significant rainfall decreases (1950–2000) in the Mediterranean basin and the atmospheric circulation at the 500 hPa level. The months and seasons of the subregions with significant rainfall decrease during this period have been identified previously (Norrant and Douguédroit, Theor Appl Climatol 83(1–4):89–106, 2006): October in the Mediterranean Iberia, March in the Atlantic Iberia, January and winter in Greece, and winter in the Near East. Canonical Correlation Analyses based on the monthly and daily data records from 62 rainfall stations and 138 grid points at the 500 hPa level over a Euro-Atlantic window were first calculated to define the TeleConnection Patterns explaining significant regional rainfall decreases. Then, 500 hPa level weather types (ZWTs) of the rainy days with important or little rainfall associated with each Teleconnection Pattern were identified in each subregion. Rainfall-causing disturbances from the Atlantic reach Iberia directly; some of them are regenerated if they reach the Mediterranean. Other disturbances are generated locally near Greece and the Near East (Meteorological Office in Weather in the Mediterranean I: general meteorology, Her Majesty’s Stationery Office, London, 1962). The relationship between significant rainfall decreases and the corresponding 500 hPa level appears to be a nonlinear phenomenon. In all of the studied subregions, a break during the 1970s separates two subperiods differing significantly from each other. Rainfall decrease is due to the higher frequency of important rainfall ZWTs over low rainfall ZWTs, during the first period, which the opposite is true during the second period. Such an inversion could be partially linked with the prevailing North Atlantic Oscillation-positive phase during the last quarter of the twentieth century. |
| Starting Page | 1725 |
| Ending Page | 1741 |
| Page Count | 17 |
| File Format | |
| ISSN | 14363798 |
| Journal | Regional Environmental Change |
| Volume Number | 14 |
| Issue Number | 5 |
| e-ISSN | 1436378X |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2013-09-03 |
| Publisher Place | Berlin/Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | TeleConnection Patterns 500 hPa level weather types Rainfall significant decrease Mediterranean basin NAO Climate Change Climate Change/Climate Change Impacts Oceanography Geography (general) Regional/Spatial Science Nature Conservation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Global and Planetary Change |
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