Solar Forcing of the Streamflow of a Continental Scale South American River

Details Solar Forcing of the Streamflow of a Continental Scale South American River Solar Forcing of the Streamflow of a Continental Scale South American River

2008-10-21

arxiv.org/abs/0810.3882v1

Phys.Rev.Lett.101:168501,2008

Physics

Atmospheric and Oceanic Physics

4 pages, 3 figures, published in Physics and Review Letters

Scientific paper

10.1103/PhysRevLett.101.168501

Solar forcing on climate has been reported in several studies although the evidence so far remains inconclusive. Here, we analyze the stream flow of one of the largest rivers in the world, the Parana in southeastern South America. For the last century, we find a strong correlation with the sunspot number, in multidecadal time scales, and with larger solar activity corresponding to larger stream flow. The correlation coefficient is r=0.78, significant to a 99% level. In shorter time scales we find a strong correlation with El Nino. These results are a step toward flood prediction, which might have great social and economic impacts.

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