Streamflow variations across the Andes (18°-55°S) during the instrumental era.

In contrast, the decadal time series of PC8 shows several moving decades outside the significant thresholds and is dominated by an increasing trend that began in the 1970s and continued unabated until 2015 (Fig. 6H ).

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The PC6 mean monthly record from Tierra del Fuego also shows a positive trend in surface runoff during the period of available measurements (from December 1980 to April 2016, with two series from May 1981 onwards; Fig. 4F ).

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