Influence of Rivers, Tides, and Tidal Wetlands on Estuarine Carbonate System Dynamics

Estuaries and Coasts, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 18, 2024

Abstract Variations in estuarine carbonate chemistry can have critical impacts on marine calcifying organisms, yet the drivers of this variability are difficult to quantify from observations alone, due strong spatiotemporal these systems. Terrestrial runoff and wetland processes vary year based local precipitation, often strongly modulated by tides. In study, a 3D-coupled hydrodynamic-biogeochemical model is used controls system coastal plain estuary, specifically York River estuary. Experiments were conducted both with without tidal wetlands. Results show that average, wetlands account for 20–30% total alkalinity (TA) dissolved inorganic carbon (DIC) fluxes into double-estuarine CO 2 outgassing. Strong quasi-monthly driven tides causes fluctuations between net heterotrophy autotrophy. On longer time scales, results wetter years, lower light availability decreases primary production relative biological respiration (i.e., greater heterotrophy) resulting substantial increases Additionally, advective exports DIC TA Chesapeake Bay increase factor three four, concentrations within Quantifying complex not only essential better understanding cycling, but also leads an improved assessment health functioning ecosystems present day under future climate change.

Language: Английский

Geochemical drivers of manganese removal in drinking water reservoirs under hypolimnetic oxygenation

Applied Geochemistry, Journal Year: 2024, Volume and Issue: 172, P. 106120 - 106120

Published: July 27, 2024

Language: Английский