Joint Seminar: Riverine and coastal contributions to the global oceanic carbon cycle

Biogeochemical riverine fluxes and their implications in the ocean, most notably for carbon fluxes in the coastal ocean, are poorly constrained in global budgets. Past approaches to quantify these fluxes for have largely revolved around using conceptual box models, which do not resolve important spatial features prevailing in the ocean. Regional models, on the other hand, which account for the highly heterogeneous dynamics of individual coastal systems, have not provided a global perspective to the problem. During my PhD thesis and post-doc at MPI-MET, I have addressed the implications of riverine fluxes in the ocean for the pre-industrial time period up to the present day, using the ocean biogeochemistry model HAMOCC coupled to the ocean circulation model MPI-OM. The carbon fluxes on continental shelves are thereby focal points of analysis. Key findings include the interhemispheric transfer of riverine carbon in the model, the simulated global pre-industrial autotrophic state and CO2 sink found on the global continental shelf and a substantial perturbation of the global coastal ocean net primary production (NPP) induced by the 20th century increase in riverine nutrient supplies.

Datum

16.10.2019

Uhrzeit

13:30 Uhr

Ort

Geomatikum H4
Lecture hall H4 (ground floor), University of Hamburg, Bundesstr. 55, Hamburg

ReferentIn

Fabrice Lacroix, Max-Planck-Institut für Meteorologie

Chair

Tatiana Ilyina

Zur Übersicht