1. Long-Term and Short-Term Variations of Sea Level in Eastern Canada: A Review
- Author
-
Mohammed I. El Sabh, Jean-Pierre Chanut, T. S. Murty, and Karim Hilmi
- Subjects
geography.geographical_feature_category ,Storm surge ,Estuary ,Oceanography ,Annual cycle ,Subarctic climate ,Secular variation ,Current (stream) ,Geography ,Harbour ,computer ,Sea level ,computer.programming_language - Abstract
This is a review of sea level data performed at three selected stations (Quebec-Lauzon, Harrington Harbour,and Halifax) in eastern Canada in order to investigate the seasonal trends and other long-term and short-term changes which occurred since the beginning of the 20th century. Stations situated in riverine or estuarine regions (e.g., Quebec-Lauzon) are significantly affected by freshwater flow in their annual cycle of sea level changes and exhibit a definite maximum in spring and minimum in autumn-winter. Other stations situated in the eastern half of the Gulf of St. Lawrence (e.g., Harrington Harbour) or near the open Atlantic coast (Halifax) mainly follow the general cycle of subarctic regions, with lows in spring-summer and highs in autumn-winter. Such seasonal variations appear to be related to the atmospheric pressure and baroclinic current variations. Secular trends in mean sea level in eastern Canadian waterbodies show a mean rise of about 2.56 mm/yr -1 due to tectonic motions, that is, land sub...
- Published
- 2002