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Annual floods in New England (USA) and Atlantic Canada : synoptic climatology and generating mechanisms

Auteur(s) et Affiliation(s)

COLLINS, M.J.
National Marine Fisheries Service, National Oceanic and Atmospheric Administration, Gloucester, MA, Etats-Unis
KIRK, J.P.
Dept. of Geography , State Univ., Kent, Etats-Unis
PETTIT, J.
Dept. of Atmospheric and Oceanic Sciences, Univ. of Colorado, Boulder, Etats-Unis
DEGAETANO, A.T.
Dept. of Earth and Atmospheric Sciences, Cornell Univ., Ithaca, Etats-Unis
MCCOWN, M.S.
National Climatic Data Center, National Oceanic and Atmospheric Administration, Asheville, Etats-Unis
PETERSON, T.C.
National Climatic Data Center, National Oceanic and Atmospheric Administration, Asheville, Etats-Unis
MEANS, T.N.
The Baldwin Group, Inc., Asheville, Etats-Unis
ZHANG, X.
Climate Research Division, Environment Canada, Toronto, Canada


Description :
The AA. analyzed a set of long-term annual flood records at climate-sensitive stream gauges across New England (USA) and Atlantic Canada and classified the synoptic climatology of each annual flood, quantitatively describing the precipitation mechanisms, and characterize flood seasonality. They find that annual floods here are dominantly generated by Great Lakes-sourced storms and Coastal lows, known locally as nor'easters. Great Lakes storms tend to be associated with lower magnitude annual floods and Coastal lows are more clearly associated with higher magnitude events. Tropical cyclones account for few of all annual floods, including extreme events, despite causing some of the region's largest and most destructive floods. Late winter/early spring is when the greatest number of annual floods occur region wide, and rainfall is the dominant flood-producing mechanism. Rainfall in combination with snowmelt is also important. Both mechanisms are expected to be impacted by projected regional climate change.


Type de document :
Article de périodique

Source :
Physical geography, issn : 0272-3646, 2014, vol. 35, n°. 3, p. 195-219, nombre de pages : 25, Références bibliographiques : 55 ref.

Date :
2014

Editeur :
Pays édition : Royaume-Uni, Abingdon, Taylor and Francis

Langue :
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)