Increasing drought in the American Southwest ? A continental perspective using a spatial analytical evaluation of recent trends

Auteur(s) et Affiliation(s)

BALLING, R.C.

School of Geographical Sciences and Urban Planning, Arizona State Univ., Tempe, Etats-Unis

GOODRICH, G.B.

Dep. of geography and Geology Western Kentucky, Univ., Bowling Green, Etats-Unis

Description :
The AA. use a variety of spatial analytical methods to assess drought trends in the America Southwest with respect to trends throughout the rest of the United States. Using 1980 as a start of their study period, they show that a highly statistically significant trend toward increased drought has occurred in the American Southwest; the trend is particularly strong over the Colorado River Basin. The primary temporal variance in PDSI values is significantly related to two major teleconnections: the Pacific North American pattern (PNA) and the Atlantic Multidecadal Oscillation (AMO); the relationship with the teleconnections is much stronger in winter than in summer.

Type de document :
Article de périodique

Source :
Physical geography, issn : 0272-3646, 2010, vol. 31, n°. 4, p. 293-306, nombre de pages : 14, Références bibliographiques : 34 ref.

Date :
2010

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

Langue :
Anglais