<Dynamic variability of biogeochemical ratios in the Southern California Current System>
(Abstract) We use autonomous nitrate (NO 3−), oxygen (O 2), and dissolved inorganic carbon (DIC) observations to examine the relationship between ratios of C: N: O at an upwelling site in the Southern California Current System. Mean ratios and 95% confidence intervals observed by sensors over 8 months were NO 3−: O 2=− 0.11±0.002, NO 3−: DIC= 0.14±0.001, and DIC: O 2=− 0.83±0.01, in good agreement with Redfield ratios. Variability in the ratios on the weekly time scale is attributable to shifts in biological demand and nutrient availability and shown to exhibit a spectrum of values ranging from near 100% New Production to 100% Regenerated Production.