DCV and River Flow

Associations between DCV phenomena and river flows are shown here. Global river flow data from January 1961 through December 2014 from the Global Runoff Data Centre (GRDC) were used. Monthly data were created from daily data where at least 50% of the data were available. Locations were selected where at least 80% of the annual or seasonal data were available. Linear trends were removed from all river flow data prior to analysis.

Annual and seasonal correlations between DCV indices and river flow can be displayed.

Choose a DCV phenomenon to display its correlation coefficient maps with river flows:






Major conclusions of these and other analyses are:
  • Very large – 20-30% of annual-average or even larger – multiyear river flow anomalies are associated with DCV phenomena.
  • There is physical consistency among implied precipitation, dryness/wetness, and river flows in North and South America, Europe, southern Africa, and Australia; and DCV phenomena.