Time variability of cyclonic geostrophic circulation in the Mediterranean

Guijarro, J. A.; Jansà, A.; Campins, J.

doi:https://doi.org/10.5194/adgeo-7-45-2006

Articles | Volume 7

https://doi.org/10.5194/adgeo-7-45-2006

© Author(s) 2006. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

https://doi.org/10.5194/adgeo-7-45-2006

© Author(s) 2006. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

Articles | Volume 7

24 Jan 2006

| 24 Jan 2006

Time variability of cyclonic geostrophic circulation in the Mediterranean

J. A. Guijarro, A. Jansà, and J. Campins

Abstract. Interannual variability and trends of the surface geostrophic cyclonic circulation and cyclone frequency in Western and Eastern Mediterranean areas are analyzed, based on a cyclone data base derived from the ERA-40 ECWMF reanalysis (within the MEDEX project tasks), spanning from September/1957 to August/2002. In this 45 years, the cyclonic circulation show a significant decrease in the Western Mediterranean, mostly in winter and spring, and an increase in the Eastern, mainly due to the summer and autumn increase in the frequency of thermal lows.