.
attempt to explain equatorial weatuer oy means of concepts; developed
from the study of the weather in Northwest surope -- in other words,
| by frontal and. air mass concepts =~ and trezst equatorial research
as a department ofHetecrology witn problems of its own, requiring
special observations and methods of solution.
Of these metiocs
the analysis of the velocity field stands out as the most useful
at the present tie, because it nas been the most neglected.
we
_ must, of course, consider also the relation of the wind field to
the fields of pressure, of temperature, and of composition (weather).
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som Ww!
tegemeeee ie.
hes Nate wt ree ce etter | etter te oe penne meen,
re
The researches I have described, in fact, raisy more proble.as tnan
they solve, wiicn is a promising sign for tne future.
Secondly, the "fronts" of the equatorial regions, now
receive an unequivocal Kineuwatic definition -- they are asymptotes
of convergence in the streamline field.
in the early stages
of wave development, they are absent or weak.
They develop in
intensity as the wave becomes unstable and ure most marxea when
the definitive vortex is formed.
in other words the equatorial
front, or fronts, considered as synoptic entities do not precede the formation.
is obvious.
The influence of this principle on forecasting
Thirdly, the "equatorial front"in tns sense I have
described, is continuous only where one has 4 continuous series of
vortices such as occurs westward from Guam during the wet season.
Hlsewhnere it appears and disappears witna the varying nistory of
the equatorial waves, in a manner entirely familiar to equatorial
forecasters,
-_T
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