Kurihara, Y., 1973: Experiments on the seasonal variation of the general circulation in a statistical-dynamical model. Journal of the Atmospheric Sciences, 30 (1), 25-49.
Abstract: A study of the seasonal change of a climatic state of the atmosphere is
made through the investigation of a response of a statistical-dynamical
model to insolation having seasonal variation. Numerical experiments are
performed for the two hypothetical cases: the land-covered earth (LCE) and
the ocean-covered earth (OCE). The two cases differ in the thermal and aerodynamical
conditions at the surface, and a hydrologic cycle is incorporated only in
the model for OCE.
Numerical integrations are carried out until the same climatic state as
one year before reappears. Then, annual marches of the zonal mean field,
the eddy statistics, and the energetics are analyzed.
Baroclinicity at the middle latitudes is noticeable, in summertime, only
for the OCE. Strong upper level easterly flow evolved at low latitudes for
the LCE. The mean meridional circulation at low latitudes for both LCE and
OCE is characterized by one big Hadley cell extending from the summer into
the winter hemisphere. In the OCE, the water vapor is exported from the
subtropics equatorward by the mean meridional circulation and poleward by
large-scale eddies. The effect of ocean is to moderate the seasonal change
of eddy activity so that the eddy transport of heat for the OCE is smaller
in winter and larger in summer than that for the LCE.
The additional experiments show the dependency of the eddy statistics of
the model on the internal viscosity. It is also shown that the after-effect
of a sudden shock lasts about five months in the atmosphere for the OCE.