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(Article of periodic en Anglais - 2013)

Document title

Increasing rainfall, decreasing winds, and historical changes in Santa Catarina dunefields, southern Brazil

Authors(s) and Affiliation(s)

MIOT DA SILVA G. (1 2) ; HESP P.A. (1 2) ;
(1) School of the Environment, Flinders Univ., Adelaide, AUSTRALIE
(2) Coastal Studies Inst., Louisiana State Univ., Baton Rouge, ETATS-UNIS

Abstract

Morphological and vegetation changes on the Moçambique barrier dunefield system are examined for the period 1938-2002 from aerial photography, and a variety of factors are investigated as possible driving factors. Human factors include a decrease in grazing pressure and tree felling from the early 1960s onwards after 200 years of these activities, and fires. In the 1960s tree planting also took place. During the period 1963 to 1970 there was a marked decline in drift potential (DP – potential sand transport), and then a period of very low DPs (1970-1974). This period falls within the time interval when vegetation cover significantly increased by ~70% along the Moçambique barrier (from 1956 to 1978). During the 1960s to present, the rainfall increased. Analyses of other transgressive dunefields in Santa Catarina and Rio Grande do Sul states show similar trends so it is likely that climatic factors such as increasing rainfall and decreasing DPs are responsible for driving dunefield changes and vegetation colonization of the barriers

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2013, vol. 38, no9 [pp. 1036-1045]

Bibliographic references : 1 p.

Collation : 10 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3390

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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