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1

Most cyclones, ................, are generated in the MB itself

87%

2

Most cyclones, 87%, are generated in the MB itself. This cyclogenesis is found to form under the influence of

a pre-existing cyclonic system, defined as a “parent cyclone”

3

The scenarios described below concentrate on the

location of the genesis in the MB with respect to the location of the “parent cyclone”, being either in Europe, North Africa or the MB itself.

4

Parent cyclone (scenarios)

(61% of the cyclones generating in the MB formed as daughter cyclones)

  1. (51%) Parent: Eastern Europe
  2. (25.5%) Parent: Atlantic Cyclones 
  3. (23.5%) Parent: central europe (north of the region of the mediterranean cyclogenesis)

5

Most (61%) of the cyclones generating in the MB are formed as

“daughter cyclones”

6

Most (61%) of the cyclones generating in the MB are formed as “daughter cyclones” by the influence of

European “parent cyclones”

7

Most (61%) of the cyclones generating in the MB are formed as “daughter cyclones” by the influence of European “parent cyclones”. The cyclogenesis occurred in

the lee of the main mountain ridges, i.e., the Alps, the Balkans or the Taurus.

8

Three scenarios are identified. In the first scenario (51% of the cases related to European cyclones), the parent cyclones are located over

Eastern Europe

9

Three scenarios are identified. In the first scenario (51% of the cases related to European cyclones), the parent cyclones are located over Eastern Europe and the resulting cyclogenesis took place over

the Aegean Sea and or the lee of the Taurus Mountains.

10

the parent cyclones are located over Eastern Europe and the resulting cyclogenesis took place over the Aegean Sea and or the lee of the Taurus Mountains.

All of these cyclones reached the

eastern part of the MB and then moved further to the east or turned north, at southeast Turkey, toward the Black Sea

11

All of these cyclones reached the eastern part of the MB and then moved further to the east or turned north, at southeast Turkey, toward the Black Sea (Fig. 3.a). In some cases the “daughter” Mediterranean cyclone, when reaching the Black Sea, generated

another cyclone in the eastern Mediterranean that can be referred as a “granddaughter cyclone”.

12

In the second scenario (25.5%), the cyclones are generated over the

western part of the MB

13

In the second scenario (25.5%), the cyclones are generated over the western part of the MB, mostly in the

Gulf of Genoa or the lee of the Pyrenees

14

In the second scenario (25.5%), the cyclones are generated over the western part of the MB, mostly in the Gulf of Genoa or the lee of the Pyrenees, under the influence of

Atlantic cyclones, which became European cyclones

15

In the second scenario (25.5%), the cyclones are generated over the western part of the MB, mostly in the Gulf of Genoa or the lee of the Pyrenees, under the influence of Atlantic cyclones, which became European cyclones (Fig. 3.b). These cyclones moved

eastward and when reaching Italy or the Aegean Sea turned northward and merged with the European cyclone track. Only 10% of those cyclones reached the eastern MB.

16

In the third scenario (23.5%), the cyclones are generated at the

central MB, mostly south of the Italian Alps.

17

In the third scenario (23.5%), the cyclones are generated at the central MB, mostly south of the Italian Alps. The “parent” cyclones are located over

central Europe, almost precisely north of the region of the Mediterranean cyclogenesis (Fig. 3.c). 10.7% of those cyclones reached the eastern MB.

18

To conclude, the location of the “parent” cyclone with respect to the MB, determines the

location of the cyclogenesis, and the tracks of the “daughter” cyclone.

19

To conclude, the location of the “parent” cyclone with respect to the MB, determines the location of the cyclogenesis, and the tracks of the “daughter” cyclone. Generally, for parent cyclones located over Western Europe, the cyclogenesis took place

southeast of it.

20

For central Europe, it took place to the

south

21

for Eastern Europe the cyclogenesis took place to the

southwest

22

After their formation, the “daughter” cyclones move

mostly eastward;

some of them reach the Eastern MB,

some of them dissipate in the central MB and

the rest merge with the European cyclone track.

23

The further the cyclogenesis is from the Eastern MB, the

smaller is the chance of the “daughter” cyclone reaching that region

24

The MB is frequently found to be dominated by

an easterly flow associated with a north-south pressure gradient.

25

The MB is frequently found to be dominated by an easterly flow associated with a north-south pressure gradient. Under these circumstances troughs extended from

Africa

26

Under these circumstances troughs extended from Africa, within which cyclones develop over the

southern coasts of the Mediterranean

27

Under these circumstances troughs extended from Africa, within which cyclones develop over the southern coasts of the Mediterranean. Such a development, which can be considered as

reflecting transformation of tropical disturbances to extratropical cyclones

28

Such a development, which can be considered as reflecting transformation of tropical disturbances to extratropical cyclones, is observed in the

western, central and eastern parts of the MB

29

Such a development, which can be considered as reflecting transformation of tropical disturbances to extratropical cyclones, is observed in the western, central and eastern parts of the MB. This scenario is responsible for

34.5% of the cyclones generated in the MB

30

The first (........% of the cases) is the

68.5

eastern part of the MB