The Mid-Atlantic Coastal Acidification Network's (MACAN) next webinar, on Jan. 9 from 1-2 p.m., will focus on modeling what drives changes in the CO₂ system of the Chesapeake Bay. Dr. Marjorie Friedrichs from the Virginia Institute of Marine Science will be presenting. Below is an abstract for the presentation:

The Chesapeake Bay is experiencing multiple environmental stressors that have important feedbacks on the carbonate chemistry of this system. To distinguish natural interannual variability in the estuarine environment from the impacts of local anthropogenic changes (changing nutrient inputs) and global change (increases in atmospheric temperature and CO₂), we must rely on numerical models calibrated with CO₂ system observations at appropriate spatial and temporal scales. Using a combination of conventional shipboard sampling and new high-frequency autonomous instrumentation, we are collecting new observations that will yield insight into diurnal, seasonal, and interannual variability of the CO₂ system in the Chesapeake Bay. These high-quality observations will also be used to assess the uncertainty associated with the EPA’s 30+ year water-quality monitoring database of pH and alkalinity. A ROMS-based biogeochemical model has been coupled with a terrestrial ecosystem model, and has been evaluated with these long-term observations. Preliminary results from this project, specifically the drivers of variability in the system, will be presented.

To register, visit https://attendee.gotowebinar.com/register/2081755228410353410