Riding & the barrel: Deike, Melville & Popinet 2016 (air entrainment,
JFM 801); Pizzo 2017 (surfing criterion, JFM 823); Minnaert resonance & surf acoustics (Deane/Stokes); Coastal Wiki (shoaling, energy flux, breaker type). Ride speeds: GPS-measured.
Wipeout: Ma/Kirby/Shi 2012 (void fraction & downbursts); Panneton 2013 (dive reflex); Lawes et al. 2023,
PLOS ONE (fatality epidemiology, low-risk framing). Descriptive only — no instruction.
Charge & field: balloelectric / spray-electrification charge separation (1892); ESA Swarm (ocean tidal magnetic signal, ~1–2 nT); motional EMF estimate |v×B| with B≈50 µT.
Iron & the body: Kirschvink et al. 1992,
PNAS (brain magnetite); Wang/Kirschvink 2019,
eNeuro (EEG response to field rotation — subjects unaware); hemoglobin iron (textbook); wave placer sorting (USGS).
Mind & water: Csikszentmihalyi (flow); Dietrich 2003 (transient hypofrontality); Georgiou et al. 2021 (blue-space restoration, modest/confounded); Polynesian wayfinding (Hōkūleʻa). Grounding-as-cure claims are
not supported by rigorous evidence and are not made here.
The Transition-Zone Coupling Profile is an original synthesis, computed from the live surf engine's measured outputs.