Fig. 2: Full Southern California-Baja hotspot to illustrate frontal detection and frontal characteristics.
From: Global trends of fronts and chlorophyll in a warming ocean
a snapshot of observed frontal positions (thin black lines) overlapping 8-day averaged sea surface temperature (SST) values for 16 Oct 2017 – 23 Oct 2017; b, d, f, h spatial patterns of trends in SST, frontal frequency (Ffreq), frontal strength (Fstre), and log-transformed chlorophyll (Chl) concentration; c, e, g, i time series averaged over the whole area in SST, Ffreq, Fstre, and Chl and associated linear trends. Linear trend values (per decade) are shown at the bottom-right corner of panels c, e, g, and i, where ‘*’ indicates statistical significance at the 95% confidence level. The gray shading in panels c, e, g, and i highlights the overlapping period (2003–2010), between our study and two previous ones.
