Tropical Cyclogenesis and Ecoinformatics Methods - New Ecoinformatics Tools in Environmental Science: Applications and Decision-making - page 625

of typhoons move along this parabolic trajectory. The remaining 53 % move along
other trajectories and, as a rule, not strictly regularly. But still, a great group of
typhoons (21 %) move, as a rule, along half the parabolic territory mentioned
above, and then move from south-east to north-west. Seven percent of typhoons
move east-to-west and from south-west to northeast, and 4 % of typhoons move
from south-to north.
Extreme atmospheric processes that have different external effects, undoubtedly,
have general origin. The search of the correlation between them can help to solve
the problem of earlier detection of tropical hurricane. However, it is necessary to
understand the interactivity character of processes that forego to the tropical hur-
ricane. Especially, this is important when temperature conditions for the hurricane
beginning are not realized.
The possibility that formation of hurricanes formed at temperature of an ocean

' s

surface below 27 uence of other factors is not excluded.

For example, a constant or frequent-periodic degassing of rift zones of the Earth,
connected with magmatic, volcanic and hydrothermal activity on an ocean

° C is connected with in fl

fl floor of a

tropical zone promotes considerable decrease in the level of “ ocean-atmosphere “

system stability.
Figures 7.28 and 7.29 explain the role of geo-tectonic factors in tropical cyclo-
genesis activity. Considering the Fig. 7.29 , it is necessary to notice that when the
seafloor crust is younger, progress of tectonic processes and processes of degassing is
especially probable. According to these schemes, a number of tropical depressions
were generated practically over the mid-Atlantic ridge. The mid-Atlantic ridge has
the most strongly pronounced features among others mid-oceanic ridges of the World

Fig. 7.28 Map of lithospheric plates ( http://uccpbank.k12hsn.org )