ERSEM 26.02

Major New Feature: mesozooplankton diel vertical migration (DVM)

• Adapted from original code by Çağlar Yumruktepe (NERSC), available at: https://github.com/nansencenter/nersc.
• Important: requires specifying model timestep (tstep) in configuration file.
• Note: Double the mesozooplankton maximum specific uptake rate (sum) when DVM is active.

Improvements

• Increased sinking velocities for medium (R6) and large (R8) particulate organic matter based on recent literature.
• Important: requires semi-Lagrangian sinking scheme (NEMO 4.0-FABM or NEMO 5.0+) to ensure mass conservation.

Parameterisation updates

• Increased DOM remineralisation rates (literature-based).
• Decreased pelagic nitrification rates (literature-based).
• Updated benthic denitrification partitioning (pdenit) to realistic values.
• Important: Use lower pdenit values in 0D/1D setups to prevent nitrogen depletion.

New configuration

• Default testcase is fabm-ersem-26.02-dvm.yaml.
• Previous testcases moved to subfolders organised by parameterisation.

ERSEM 22.11

• Added pelagic denitrification following Sankar et al (2016).
• Parameterisation of pelagic production and air-sea exchange of nitrous oxide following Lessin et al (2020).
• Added first-order kinetics capability to the pelagic base module
• Units of total alkalinity and bioalkalinity have been changed from umol/kg to mmol/m3.
• Extended documentation with new and updated tutorials.

ERSEM 20.10

• Updated documentation for public release on GitHub

ERSEM 20.09

• Harmonised and extended formulations for air-sea exchange of oxygen and carbon dioxide – with thanks to Phil Wallhead @ NIVA
• Dissolution of benthic calcite is now dependent on saturation state (this was already the case for pelagic calcite)
• Fix to prevent spurious oxygen production under heavy deposition at the bed
• Compatibility with FABM 1.0