Fig. 1: Overview of the collocated datasets and one example of eddy sampled by acoustic.
From: A rare oasis effect for forage fauna in oceanic eddies at the global scale
A map of acoustic data sampling cyclonic (CE, blue) and anti-cyclonic (AE, red) eddies; (B) density of acoustic tracks around and within eddies (from blue to red, dark cycles represent the normalized effective radius) for anti-cyclonic (AE, top panel) and cyclonic (CE, bottom panel) eddies; numbers indicate the number of sampled eddies (“Ne =”, top) and the number of acoustic profiles (“Na =”, bottom) in each eddy type; (C) Example of one acoustic track section in an anticyclonic eddy showing scattering sound layers of marine fauna (unit: Nautical Area Scattering Coefficient, NASC in m2 mn−2). The vertical white bars denote the separation between the “inside” and “outside” of the sampled eddy, as depicted in (D) by the grey polygon and the acoustic track from the ship. In (D), the vertical mean NASC profiles in the inside (purple) and in the outside (green) areas are drawn together with the 95 % confidence interval (1.96*standard deviation/root square of number of observations) of the mean values. Source data are provided as a Source Data file.
