1. ACME Land Group Overview and Roadmaps Group Leads: Peter Thornton and Bill Riley

2. ACME-LM: Modular Design and Tasks ED Vegetation tasks (M4) Litter fluxes Microbe-enabled decomposition (M3.8) Dissolved inorganic N and P Dissolved organic matter Methane module (M3.11) Plant-microbe competition for nutrients (M3.14) Nitrification and denitrification (M3.10) Inorganic phosphorus module (M3.12) Root structure and function Soil biogeochemistry VIC runoff (M3.1) MOSART river hydrology (M3.2, M8) River BGC(M3.7) Subsurface hydrology Improved root hydrology (M3.4) Head-based hydrology (M3.5) PFLOTRAN thermal hydrology (M3.3) followed by: Surface hydrology (and river BGC) Vegetation structure and function B P B B B B O O O O P P UQ (T6), Functional unit testing (T7), Benchmarking O O Other tasks B O P A LBNL ORNL PNNL ANL Task Lead Crop model (M6) A S SNL S Orographic downscaling (P5) P Atm coupling

3. Capabilities in development for V1 (applicable experiment: WC, BGC, or ALL) Common architecture (ALL) Orographic downscaling (WC) Variably saturated flow - VSF (WC) PFLOTRAN BGC interface (BGC) Coupled C-N-P cycles (BGC) Alternative plant-microbe competition - ECA (BGC) Initial crop model improvements (ALL) MOSART river routing - uncoupled (ALL) UQ framework (ALL) Evaluation / benchmarking framework (ALL) Functional unit testing framework (ALL)

4. Capabilities in development for V2 VIC-based runoff MOSART river routing – coupled Managed hydrology Riverine biogeochemistry Improved soil thermal hydrology – PFLOTRAN Improved root hydrology Explicit microbes, methane model Nitrification, denitrification, N-fixation Ecosystem demography – ED Additional UQ Additional evaluation / benchmarking Human dimensions (pending)

5. Progress to date on V1 developments (1 of 2) Common architecture –Decision made to base ED development on V1 model, eliminating long-lived ED development branch Orographic downscaling –Documented approach, developing subgrid elevation, coordinating with atmosphere group Variably saturated flow (soil hydrology) –PETSc-based solver complete, coupled to surface fluxes PFLOTRAN BGC interface –BGC interface complete and tested for C-N coupling Coupled C-N-P model –C-N-P development complete, site-level testing underway E E E E P P E E

6. Progress to date on V1 developments (2 of 2) Alternative plant-microbe competition – ECA –Three papers submitted describing new approach for nutrient competition, plant traits, and advective losses Crop model improvements –Dynamic rooting profiles, harvest routine port complete MOSART river routing – uncoupled –Inundation model tested for Columbia and Amazon river basins UQ framework –Sensitivity analysis for two sites with ACME V0 (55 parameters, 10,000 simulations), paper in review –Spinup acceleration and offline model acceleration achieved Benchmarking framework –Group development of data sets and metrics continues Functional unit testing –Code analysis for ACME v0 E E E E E E E E

7. Progress to date on V2 developments (1 of 2) Water management –Global testing ongoing Riverine BGC –Sediment model added to MOSART, simple global parameterization –MOSART migration to ACME code base is underway Improved thermal hydrology – PFLOTRAN –Migrated interface to ACME code (complete) –Initial global tests in 1D (vertical-only) mode complete, above- freezing Improved root hydrology –Dual continuum connected matrix approach implemented, benchmark case for macropore flow developed and executed E E E E E E

8. Progress to date on V2 developments (2 of 2) Microbe-enabled decomposition and methane dynamics –Development and testing in new BGC framework underway Nitrification, denitrification, N-fixation –Developing and analyzing reduced order models Ecosystem Demography – ED –Vegetation demography, size-structured plant competition, mechanistic mortality, and plant trait filtering introduced in ACME, based on CLM-ED –Site-level evaluation underway for Manaus Brazil, Iquitos Peru, the Congo, and a temperate forest in California Human dimensions (pending) –Prognostic human influence on carbon and water cycles E E F F P P E E F F

9. Roadmap for developments targeting V1 June 2015 –Common architecture complete –ECA implemented July 2015 –Global watershed and topounit datasets complete –Offline VSF simulations –C-N-P tested in PF-BGC August 2015 –Multiple nutrient competition approaches enabled September 2015 – C-N-P global run parameterized – Nutrient competition model benchmarking October 2015 – Coupled VSF simulation – UQ parameter estimation complete November 2015 – Coupled system testing (F, B cases) for C-N-P and nutrient competition – Crop planting dates complete