Interactive protocol and 3a/b protocol updates

Posted by Martin Park on Dec. 23, 2021

Dear ISIMIP modelers,

Just in time for Christmas, we finalized a small present for all of you: We proudly present a reworked version of the ISIMIP3 protocol. It allows you to combine several sectors and look at their common variables, shows variables in groups and sector tags for better overview. Static links allow you to share or come back later to your choices and all changes to the protocol are tracked. Sectors under construction are marked. We hope this will be beneficial for your work and you will enjoy this new design.

Furthermore, we made some changes to the ISIMIP 3a/b protocol affecting the general parts of the protocol, and specifically the Biomes, Permafrost, Fire and the Global Water sectors:

The “nat scenario” (without any direct human forcing) is no longer part of the general, cross-sectoral 3b protocol. It has been replaced with a 1850soc scenario in ISIMIP3b and a 1901soc scenario in ISIMIP3a which are now consistently defined across sectors.

Thanks to the initiative of the Biomes and Marine Fisheries sector coordinators Jinfeng Chang, Christopher Reyer and Julia Blanchard the “nat scenario” is now only a sensitivity run specific to the Biomes and Marine Fisheries sectors.

In collaboration with the Permafrost sector coordinators Anne Gädecke, Kirsten Thonicke and Eleanor Burke, the Permafrost protocol was updated entirely, now including output variables related to Nitrogen and Methane, as well as a larger number of layer-specific carbon variables. Some of those variables are now also part of the Biomes protocol.

Thanks to the initiative of our Fire sector coordinators Stijn Hantson, Chantelle Burton and Fang Li, we added a no-fire sensitivity run and several fire variables are now also biomes and permafrost variables.

Thanks to the initiative of our Global Water sector coordinators Hannes Müller-Schmied and Simon Gosling, we added a no water management sensitivity run. This experiment is in line with the historical (hist) run but with all water management measures turned off.

With best wishes for the final season in 2021,

the ISIMIP team at PIK