Feedback Mechanisms For The Atmosphere And Ocean Surface |
| |
Authors: | Yaocun Zhang William Perrie |
| |
Institution: | (1) Department of Atmospheric Sciences, Nanjing University, Nanjing, 210093, PR China;(2) Ocean Sciences Division, Maritimes Region, Fisheries & Oceans Canada, Bedford Institute of Oceanography, Dartmouth, Nova Scotia, Canada, B2Y 4A2 |
| |
Abstract: | Two kinds of feedback mechanisms in the coupling process between the atmosphere and ocean surface are identified in this paper. One is a negative feedback mechanism, which is effective in the dynamic interaction processes through momentum flux exchange. In this mechanism,the ocean extracts momentum from the atmosphere as a forcing field to generate waves, which decelerates atmospheric motions, lessening the intensity of synoptic systems. The second is a positive feedback mechanism, which is effective in the thermal interaction processes through heat flux exchange. This is a mechanism that is effective in the transport of sensible and latent heat fluxes to the atmosphere from the underlyingocean surface. As a result, the atmosphere obtains energy from the ocean, which intensifies atmospheric motions. For storm conditions typical of North Atlantic mid-latitudes, we consider these thermal and dynamical nteractions, the dominance of one over the other, and related implications for storm intensification. |
| |
Keywords: | Air-sea interface Atmosphere-ocean waves coupling Dynamic and thermal interactions Feedback mechanisms Momentum and heat fluxes Storm intensity |
本文献已被 SpringerLink 等数据库收录! |
|