First considerations on the structure and development of the Iberian thermal low-pressure system
During the summer a thermal low-pressure system is locked over the Iberian Peninsula. We present a first analysis of such a system using the potential vorticity approach. Our results show that its main characteristic is the existence of a negative potential vorticity (PV) dome and a funnel-like...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
1994-04-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/12/457/1994/angeo-12-457-1994.pdf |
| Summary: | During the summer a thermal low-pressure
system is locked over the Iberian Peninsula. We present a first analysis of such
a system using the potential vorticity approach. Our results show that its main
characteristic is the existence of a negative potential vorticity (PV) dome and
a funnel-like structure for potential temperature, both located at the centre of
the low. The build-up and evolution of this PV dome can be understood in terms
of the dot products of the absolute vorticity and the gradient of diabetic
heating vectors and the curl of the friction forces and the gradient of
potential temperature vectors. The inhibition of the Algerian Mediterranean
cyclogenesis during the summer seems to bear some relation to the existence of
this kind of low-pressure disturbance over the Iberian Peninsula. |
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| ISSN: | 0992-7689 1432-0576 |