Figure 2: Swell height data for the Santa Barbara Channel.
From: Extreme warming challenges sentinel status of kelp forests as indicators of climate change
(a) Monthly anomaly in the maximum significant wave height (max Hs) measured from an offshore buoy for the period 1980–2015 and (b) Modelled mean daily values of max Hs averaged across the nine study sites for the period 2001–2015. The anomalously warm years of 2014–2015 are shown in red. Black arrows in (a) denote the 1982–83 and 1997–98 El Niños.
