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- Title
Forcing Mechanisms Controlling Surface and Subsurface Temperature Anomalies along Line-P, North-east Pacific Ocean.
- Authors
Laîné, Alexandre; Hsieh, William W.; Freeland, Howard J.
- Abstract
The influence of different mechanisms on surface and subsurface temperature anomalies is considered along Line-P, an oceanographic line extending from Vancouver Island into the Gulf of Alaska, which has been sampled for almost half a century. The role of a given mechanism is determined by applying canonical correlation analysis (CCA) between the anomalies of a parameter representing the mechanism and the Line-P temperature anomalies. For each mechanism, it is determined if its direct influence can be detected, and if so, the domain of Line-P over which it acts. Two areas along Line-P, characterized by different forcing mechanisms, are identified: (1) offshore, west of 130°W, the main mechanisms influencing Line-P temperature anomalies are the Ekman transport due to wind stress anomalies (with the zonal wind stress component somewhat more important than the meridional component) and wind mixing anomalies, (2) from the coast to 180 km offshore, coastal upwelling/downwelling anomalies and sea-surface height anomalies along the coast of North America, resulting in coastal current anomalies and/or northward propagation of coastal waves, are important in determining Line-P temperature anomalies.
- Subjects
CANONICAL correlation (Statistics); OCEANOGRAPHIC observations; STATISTICAL correlation; COASTS; TEMPERATURE
- Publication
Atmosphere - Ocean (Canadian Meteorological & Oceanographic Society), 2006, Vol 44, Issue 2, p163
- ISSN
0705-5900
- Publication type
Article