Open AccessA Study of Intraseasonal Temperature Variability in Southeastern South America
Author(s) -
Gustavo Naumann,
Walter Vargas
Publication year - 2012
Publication title -
journal of climate
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.315
H-Index - 287
eISSN - 1520-0442
pISSN - 0894-8755
DOI - 10.1175/jcli-d-11-00482.1
Subject(s) - climatology , principal component analysis , maximum temperature , environmental science , wavelet , climate forecast system , series (stratigraphy) , precipitation , meteorology , geology , geography , mathematics , statistics , paleontology , artificial intelligence , computer science
The main goal of this work was to conduct an intraseasonal climate variability analysis using wavelet and principal component analysis over a southeastern South American daily maximum and minimum temperature series from the end of the nineteenth until the beginning of the twenty-first century. The analysis showed that there is a definite and coherent signal in the intraseasonal maximum and minimum temperatures. The most noticeable signal was observed during the winter months. The frequency of the intraseasonal signal was more complex for the maximum temperature, and in some stations, it displayed a bimodal distribution.A defined pattern that described a coherent variability between 30 and 60 days throughout the entire region was observed. This pattern potentially allows classification of the regional variability and adjustments to the temperature forecasting models on a daily basis.JRC.H.7-Climate Risk Managemen