Spatio-temporal trends of precipitation, its aggressiveness and concentration, along the Pacific coast of South America (36-49°S)
Olivares, Claudio
- 1University of Arizona
- 2Universidad de Talca
- 3
- 4Minist Publ Works
Journal
Hydrological Sciences Journal
ISSN
0262-6667
2150-3435
Open Access
closed
Volume
61
Start page
2110
End page
2132
Precipitation is the most critical climatic element that directly affects the availability of water resources. The objective of this study was to describe and discuss spatio-temporal patterns of annual precipitation, its aggressiveness, and its concentration along the southwest coast of South America (36 degrees-49 degrees S) from 1930 to 2006. An annual and multi-decadal analysis was applied to 107 sampling stations distributed throughout this region, using the Mann-Kendall test (MK), and the Sampling Uncertainty Analysis (SUA) coupled with Gumbel probability density function (SUA-Gumbel). The analysis revealed positive but not significant trends in annual precipitation and aggressiveness for the region between 36 degrees and 44 degrees S, at least during the last 50years of the analysed period. However, a significant decrease in annual precipitation and aggressiveness was observed between 44 degrees and 49 degrees S during the same period. The annual concentration of precipitation became slightly more seasonal in the last 50years within the entire study area.
Name
2-s2084974717501.pdf
Type
Main Article
Size
5.18 MB
Format
Adobe PDF
Checksum
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