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TitlePerspectives relatives à la région de la côte Est du Canada
AuthorSavard, J -P; van Proosdij, D; O'Carroll, S; Bell, T; Bernatchez, P; Catto, N; Charles, A; Desjarlais, C; Drejza, S; James, T; Leclerc, L; Martel, N; Morneau, F; Quintin, C; Robinson, C; Warburton, A
SourceLe littoral maritime du Canada face à l'évolution du climat; by Lemmen, D S (ed.); Warren, F J (ed.); James, T S (ed.); Mercer Clarke, C S L (ed.); 2016 p. 100-152
Year2016
Alt SeriesEarth Sciences Sector, Contribution Series 20160050
PublisherGovernment of Canada
Documentbook
Lang.French
Mediapaper; on-line; digital
RelatedThis publication is contained in Lemmen, D S; Warren, F J; James, T S; Mercer Clarke, C S L; (2016). Le littoral maritime du Canada face à l'évolution du climat
RelatedThis publication is a translation of ().
File formatpdf
ProvinceNew Brunswick; Nova Scotia; Prince Edward Island; Newfoundland and Labrador; Quebec
NTS1; 2; 3; 10; 11; 12; 13A; 13F; 13G; 13H; 20; 21A; 21B; 21C; 21D; 21G; 21H; 21I; 21O; 21P; 22A; 22B; 22C; 22F; 22G; 22H; 22I; 22J
AreaCôte est du Canada; Océan Atlantique; Golfe du St-Laurent; Fleuve St-Laurent; L'Estuaire du St-Laurent; Baie des Chaleurs; Baie de Fundy; Mer du Labrador; Îles de la Madeleine
Lat/Long WENS -72.0000 -52.0000 54.0000 42.0000
Subjectssedimentology; marine geology; climate; climate effects; coastal environment; coastal studies; coastal erosion; coastal management; shorelines; shoreline changes; shoreface deposits; shore features; tides; tidal power; tidal environments; sea level fluctuations; sea level changes; climate change
Illustrationslocation maps; photographs; graphs; flow charts; tables
ProgramCoastal Infrastructure, Climate Change Geoscience
LinksEn ligne - Online (PDF, 5.76 MB)
LinksEn ligne - Online (Rapport complet / Full report)
Abstract(Summary)
Key Findings: Canada's East Coast region is geographically, ecologically and socially diverse, resulting in a wide range of climate change effects and responses. Analysis of existing literature and ongoing adaptation initiatives leads to the following key findings: - Air temperatures, sea-surface temperatures and ocean acidity have all increased in the region during the past century, while sea-ice cover has decreased. Projected climate changes through the 21st century include continued warming of air and water temperatures, and increased precipitation, acidification and water stratification. Sea level will rise, with significant regional variability. Sea ice will decrease in area, thickness, concentration and duration, with volume likely to be reduced by more than 95% by the end of the 21st century. - Sea-ice cover and sea-level rise are key determinants of coastal erosion rates. Increases in coastal erosion have been documented along many coasts in the region during years characterized by mild winters and low ice coverage. Future coastal-erosion rates will likely increase in most areas.
- There are many adaptation measures that promote the resilience of coastal areas. These include protection, revegetation and stabilization of dunes; maintenance of sediment supply; and provision of buffer zones, rolling easements or setbacks that allow the landward migration of the coastline. - Although hard coastal defence structures may be necessary to address sea-level rise and coastal flooding in some situations, particularly in urban areas, such structures disrupt coastal processes and can exacerbate erosion, sedimentation and coastal squeeze, leading to degradation and loss of coastal habitats and ecosystem services. Retreat, sand nourishment and managed realignment represent alternatives to hard coastal-defence structures. - Experience in the East Coast region has shown that mechanisms such as setbacks, which control or prohibit coastal development, can be challenging to implement. However, it is often even more difficult to remove and relocate buildings from an eroding coastline or flood-susceptible area. Selection of appropriate adaptation options may be particularly challenging in unincorporated areas where summer cottages, secondary homes or principal dwellings are established parallel to the shore in a ribbon fashion. - Provinces and communities across the region have made advances in identifying vulnerabilities to climate change impacts through collaboration with academia, the private sector and nongovernmental organizations. Many have begun planning for adaptation, while others have moved from planning to implementation of adaptation strategies, although this remains a challenge for many. Few are engaged in ongoing monitoring of the effectiveness of implemented adaptation strategies.
Summary(Plain Language Summary, not published)
This is a chapter of national report on Canada's coasts in the context of a changing climate. Chapter 4 focusses on the east coast of Canada. Canada's East Coast region is geographically, ecologically and socially diverse, resulting in a wide range of climate change effects and responses. Some findings include: -Projected climate changes through the 21st century include continued warming of air and water temperatures, and increased precipitation, acidification and water stratification. Sea level will rise, with significant regional variability. Sea ice will decrease in area, thickness, concentration and duration, with volume likely to be reduced by more than 95% by the end of the 21st century. -Sea-ice cover and sea-level rise are key determinants of coastal erosion rates. -Adaptation measures that promote the resilience of coastal areas include protection, revegetation and stabilization of dunes; maintenance of sediment supply; and provision of buffer zones, rolling easements or setbacks that allow the landward migration of the coastline.
GEOSCAN ID298745