Impact model: JULES-B1 (formerly JULES_UoE)

JULES-B1 (formerly JULES_UoE) is a terrestrial biosphere model and is one of the 3 models following the ISIMIP2a protocol which form the base of simulations for the ISIMIP2a permafrost sector outputs; for a full technical description of the ISIMIP2a Simulation Data from Permafrost Sector, see this DOI link:

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Information for the model JULES-B1 (formerly JULES_UoE) is provided for the simulation rounds shown in the tabs below. Click on the appropriate tab to get the information for the simulation round you are interested in.

Basic information
Model Version: JULES v4.4
Reference Paper: Main Reference: Clark D, Mercado L, Sitch S, Jones C, Gedney N, Best M, Pryor M, Rooney G, Essery R, Blyth E, Boucher O, Harding R, Huntingford C, Cox P et al. The Joint UK Land Environment Simulator (JULES), model description – Part 2: Carbon fluxes and vegetation dynamics. Geoscientific Model Development,4,701-722,2011
Output Data
Experiments: historical
Climate Drivers: PGMFD v2.1 (Princeton)
Date: 2016-08-24
Spatial Resolution: 0.5°x0.5°
Temporal Resolution Of Input Data: Climate Variables: daily
Temporal Resolution Of Input Data: Co2: annual
Temporal Resolution Of Input Data: Land Use/Land Cover: annual
Temporal Resolution Of Input Data: Soil: constant
Input data sets used
Observed Atmospheric Climate Data Sets Used: PGMFD v2.1 (Princeton)
Emissions Data Sets Used: CO2 concentration
Was A Spin-Up Performed?: Yes
Spin-Up Design: We use the 1901-1910 climate condition, pre-industry CO2 (287.14 ppm), land cover map of 1860 to do an equilibrium run of 100 years with TRIFFID on an equilibrium mode followed by a spin-up until the soil carbon to be equilibrium. Then a simulation from 1861 to 1900 was performed with varied CO2 and land-cover/land-use change, and climate of 1901-1910 cycled. The final transient simulation of 1901-2012 was forced by varied climate, CO2 and land-cover/land-use change.
Natural Vegetation
Natural Vegetation Partition: Dynamic vegetation scheme, 9PFT, PFT can coexist on the same grid cell
Natural Vegetation Dynamics: Competition between natural PFTs is based on a tree-shrub-grass dominance hierarchy
Management & Adaptation Measures
Management: No specific management. Crop area are represented by C3 and C4 grasses
Key model processes
Dynamic Vegetation: Simulated by TRIFFID representing competition between PFTs using Lotka-Volterra equations with net carbon balance as a proxy for population size.