Model of Ecosystem Dynamics, nutrient Utilisation, Sequestration and Acidification (MEDUSA)

The MEDUSA Model is an "intermediate complexity" plankton ecosystem model designed to address key feedbacks between anthropogenically-driven changes (climate, acidification) and oceanic biogeochemistry.

MEDUSA-1.0 resolves a size-structured ecosystem of small (nanophytoplankton and microzooplankton) and large (microphytoplankton and mesozooplankton) components that explicitly includes the biogeochemical cycles of nitrogen, silicon and iron.

MEDUSA-2.0, developed for the ROAM (Regional Impacts of Ocean Acidification) project, additionally includes the cycles of carbon, alkalinity and oxygen. As such, MEDUSA is broadly similar in structure to Diat-HadOCC, but includes several more recent parameterisations such as variable C:chl, ballasted fast-sinking detritus, and a dynamic Si:N ratio.

MEDUSA Diagram

 

Imarnet Presentation

MEDUSA Model Presentation
From the workshop on the assessment of candidate models
(19th & 20th November 2012)
(click to download)