Soliton-like thermal source forcing and singular response of atmosphere and oceans to it
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Nonlinear dynamic study is undertaken of the response of atmospheric and oceanic flow fields to local thermal source forcing in the context of a generalized geophysical fluid dynamic barotropic quasi-geostrophic model, discovering a good relation between thermal disturbance and flow field response to it, both having similar modes, and that the soliton-like responding field is a great deal larger in extent than the analogous-form forcing field, which implies that a “narrow” thermal disturbance can excite a “wide” response field, in some cases the particular structure of a thermal source may give rise to singular response of atmospheric and oceanic flow fields, thus displaying their abnormalities (for example the blocking situation in the atmosphere), the atmospheric and oceanic stream fields at mid-high latitudes respond to thermal forcing in a much more pronounced manner compared to those at low latitudes. The said research results that is in agreement with studies from mid-low latitude atmospheric experiments and observations and can be used to partially interpret the circulation singularity due to heat source anomaly on a local basis in the context of earch fluid flows.
Key wordssoliton thermal source forcing response of flow field
Chinese Library ClassificationP433 O354
2000 MR Subject Classification86A10
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