This study reports the first set of combined high‐frequency dissolved oxygen (DO), ammonium (), and nitrate () benthic flux measurements in a subtropical stormwater pond using the Chamber ARray for Observing Sediment Exchanges Long‐term (CAROSEL), a novel, long‐duration, autonomous sensing platform. The system conducts repeated, sub‐daily benthic chamber incubations, separately capturing fluxes from sediments and the water col...

Saline and warm Mediterranean water flowing through the Bosporus Strait maintains a permanent pycnocline with vertical separation of oxic (O 2 ), suboxic (absence of O 2 and H 2 S), and anoxic (H 2 S) zones in the Black Sea. The stable suboxic zone implies restricted vertical mixing of the upper oxic and lower anoxic layers and limited vertical flux of oxygen that cannot balance the upward flux of sulfide. We report data that...

A solid‐state Au/Hg voltammetric microelectrode was used to measure, simultaneously and with millimeter spatial resolution, the vertical distributions of O 2 , Mn 2+ , Fe 2+ , HS − , and I − in the pore water of sediments from the Canadian continental shelf and slope. The electrode was used shipboard to analyze undisturbed sediment cores and in a sediment mesocosm to determine the three‐dimensional distribution of redox specie...