WP8: Synthesis, Integration and Earth System Modeling
WP-leader: Jón Egil Kristjánsson, email: j.e.kristjansson (at) ge.uio.no
Co-WP-leader: Ari Laaksonen, email: ari.laaksonen (at) uef.fi
Co-WP-leader: Veli-Matti Kerminen, email: veli-matti.kerminen (at) fmi.fi
WP8 will address cross-cutting issues between the different components of the Earth system. These issues include interactions between the atmosphere and the cryosphere, including various feedback mechanisms. WP8 receives and exploits input from all other WPs. For instance, in collaboration with WP3, WP4 and WP5 new findings from detailed observational, laboratory or high-resolution modeling studies are used to develop new parameterizations. The objectives are to:
- Analyze cryosphere-atmosphere interactions to be included in ESM simulations
- Develop parameterizations of relevant processes for the ESM simulations
- Carry out multi-decadal ESM simulations, investigating the influence of changes in the atmospheric composition on the cryosphere
- Analyze and evaluate cryosphere-atmosphere feedback loops
ESM simulations are the only tool which can provide quantitative information on the global implications of the interactions in question. In ESMs, the sea ice extent and thickness, as well as snow cover and snow depth are interactive, responding to changes in energy fluxes and temperature due to e.g., aerosol-cryosphere interactions, but only very few models consider changes in the extent and thickness of ice caps.
In the development of the relevant parameterizations, high-resolution models are needed, enabling a direct validation against data for specific times and regions. After implementation in the ESMs, the parameterizations will be validated also by focusing on monthly and annual means. Relevant high-resolution models in this context are non-hydrostatic weather prediction models (e.g., WRF) or large-eddy simulation (LES) models.