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Applied Mathematics and Mechanics

, Volume 24, Issue 6, pp 714–719 | Cite as

Soliton-like thermal source forcing and singular response of atmosphere and oceans to it

  • Zhang Ren
  • Sha Wen-yu
  • Jiang Guo-rong
  • Wang Ji-guang
Article

Abstract

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 words

soliton thermal source forcing response of flow field 

Chinese Library Classification

P433 O354 

2000 MR Subject Classification

86A10 

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Copyright information

© Editorial Committee of Applied Mathematics and Mechanics 2003

Authors and Affiliations

  • Zhang Ren
    • 1
  • Sha Wen-yu
    • 1
  • Jiang Guo-rong
    • 1
  • Wang Ji-guang
    • 2
  1. 1.Institute of MeteorologyPLA University of Sciences and TechnologyNanjingP. R. China
  2. 2.Institute of Electronics and EngineeringNational Defense Science/Technology UniversityChangshaP. R. China

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