Cluster analysis on summer precipitation field over Qinghai-Tibet Plateau from 1961 to 2004

Auteur(s) et Affiliation(s)



Description :
The summer day-by-day precipitation data of 97 meteorological stations on the Qinghai-Tibet Plateau from 1961 to 2004 were selected to analyze the temporal-spatial distribution through accumulated variance, correlation analysis, regression analysis, empirical orthogonal function, power spectrum function and spatial analysis tools of GIS. The result showed that summer precipitation occupied a relatively high proportion in the area with less annual precipitation on the Plateau and the correlation between summer precipitation and annual precipitation was strong. The altitude of these stations and summer precipitation tendency presented stronger positive correlation below 2000 m. Using empirical orthogonal function, summer precipitation could be roughly divided into 3 precipitation pattern fields : the Southeast Plateau Pattern Field, the Northeast Plateau Pattern Field and the Three Rivers's Headstream Regions Pattern Field. Discussion and comparison of these pattern fields.


Type de document :
Article de périodique

Source :
Journal of geographical sciences. Acta geographica sinica, issn : 1009-637X, 2008, vol. 18, n°. 3, p. 295-307, nombre de pages : 13, Références bibliographiques : 27 ref.

Date :
2008

Editeur :
Pays édition : Chine