Fourthly, the problem of typnoon formation taces on a
new aspect.
During the wet season vortices are forming in an
almost continuous series westward from tn? Marsnalls and Carolines.
Unly a few of these become intense enough to be called tropical
depressions, storms or typnoona.
The problem of typhoon formation
is now seen to be the problem of intensification.
oms vortices
intensify greatly, others @ remain weak, difficult to detect in
the pressure field.
The ideal metood of investigating the
causes of typhoon formation would be to ciassify the vortices of
along series of maps into tWo classes -- tie class of those that
remain weak and the class of those that deepen rapidly and puss a
certain urbitrary intensity.
Then tne wind, tempeyrature, pressure,
and composition fields of two classes oug t to be conpared closely
to discover what features are comuzon ty ali members of the
typhoon-cepression class and absent from toe weax—-vortex class. .
work along these lines is already in prozress.
ne eeee
Fifth, typhoon tracks of the North Pacific take on a new
Significance.
«+e have go far not failed to trace back every
typhoon studied to eitner a wave or a weax vortex passing
previously across the Bikini-Tarawa-wake axis.
The heterogeneous
‘ypnoon tracxs on published maps, if extrapolated eastward, all
pass tnrough this narrow "throat",
It follows that we ought to
improve typhoon forecasting greatly by developing the observational
network in that area to a high deyree.
I expect you would lixe to have neard something about the
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