Figure 1
From: Anomalous Near-Surface Low-Salinity Pulses off the Central Oregon Coast
(a) Average precipitation across the Pacific Northwest for May 2011. Map obtained from the National Oceanic and Atmospheric Administration (http://www.nwrfc.noaa.gov/water_supply/sea_wy_summary.cgi?wy=2011). (b) Mountain snowpack across the Columbia River basin on 1 May 2011. Map obtained from the United States Department of Agriculture (http://www.wcc.nrcs.usda.gov/ftpref/support/snow/snowpack_maps/columbia_river/wy2011/cusnow1105.gif). (c) Columbia River discharge climatology (black), with standard deviations, based on the 20-year period 1993–2012. Daily mean Columbia River discharge rates for 2011 (blue).
