*Rescheduled from Friday, Oct. 9
Presenter: Dr. Raymond Najjar, Pennsylvania State University, Department of Meteorology and Atmospheric Science
When: Friday, October 23, 11:30 a.m.
Where: Zoom Webinar
Carbon cycling in the coastal zone affects global carbon budgets and is critical for understanding the urgent issues of hypoxia, acidification, and tidal wetland loss. However, there are no regional carbon budgets spanning the three main ecosystems in coastal waters: tidal wetlands, estuaries, and shelf waters. In the first half of this presentation, such a budget is developed for eastern North America using historical data, empirical models, remote sensing algorithms, and process-based models. It will be shown that lateral carbon transfers between the three main ecosystem types are comparable to fluxes at the domain boundaries. Furthermore, each ecosystem type contributes substantially to exchange with the atmosphere and to burial.
In the second half of the presentation, the recent literature is surveyed to provide a first update to the 2013 global coastal-water carbon budgets of Regnier et al. and Bauer et al. This update provides the first bottom-up estimate of the so-called “river loop,” a natural process that transfers carbon from land to the open ocean. The river loop also connects net uptake of atmospheric carbon on land with outgassing from the open ocean and therefore is necessary to consider when constructing budgets of anthropogenic carbon dioxide.
Friday, October 23 at 11:30amVirtual Event