East Asia and Western Pacific METEOROLOGY AND CLIMATE

the equations and so on. Then performing coupled or uncoupled model test
with the model are possible.
In the uncoupled model test, SST deviation is stationary, which implies
linear and nonlinear response of analogous evolution of monthly averaged
circulation to stationary SST forcing. In the coupled tests, control test is
done at first. On the basis of this, various sensitivity studies are made. The
results not only prove the result of the theoretical analysis, but also provide
a basis for utilizing further this model to do seasonal long—term numerical
forecast.
4. Discussion
It has been shown in the analysis of actual data that there is a temporal
teleconnection in the general circulation, one of which is the analogous
rhythm of monthly averaged circulation. The author believes that it is true.
In spite of this the truth of this phenomenon can still be doubtful because of
the vagueness in this phenomenon and the limitation of the statistical methods
and sample error appearing in the study.
As to the mechanism of the establishment of rhythm, the current study is
still preliminary. Although the rhythm has been simulated with a numerical
model, the physical mechanism is still ambiguous. To some extent the problems
solved far less than that those produced. Further study should be done
to realize the mechanism of the formation of climate anomalies on a seasonal
scale and present a numerical climate forecasting method.
REFERENCES
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[3] Lau, N.C., Mon. Wea. Rev., 109,2287-311(1981).
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