Overview of DALEC 1100
======================

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**Overview of DALEC model**


The DALEC model (Williams et al., 2005) is an intermediate complexity terrestrial land surface and biosphere model designed primarily for observation integration within model-data integration frameworks; DALEC models have been augmented since Williams et al., (2005) to include a number of processes, such as water storage (Spadavecchia et al., 2011; Bloom et al., 2020), aerobic and anaerobic respiration processes (Ma et al., 2023), climate-sensitive phenology (Norton et al., 2023), amongst other innovations. 

**Overview of DALEC 1100 model**


The DALEC ID=1100 model cosnists of 14 prognostic states, with the following abbreviated differential equations

***Live C states***

dNSC/dt = GPP - Rauto -  - Mortality_nsc- Alloc_total

dFol/dt = Alloc_fol - Mortality_fol - Disturbance_fol

dRoo/dt = Alloc_roo - Mortality_roo - Disturbance_roo

dWoo/dt = Alloc_woo - Mortality_woo - Disturbance_woo

***Dead organic C states***

dLit/dt = Mortality_fol + Mortality_roo - Decomp_lit - Rhet_lit - Disturbance_lit

dCWD/dt = Mortality_woo - Decomp_cwd - Rhet_cwd- Disturbance_cwd

dSoil/dt = Decomp_cwd + Decomp_lit - Rhet_som - Disturbance_Som

***Water states***

dSnow/dt = Snowfall - sublimation - melt

dSoilLY1/dt = Infiltration - transpiration_LY1 - evaporation - LY1_LY2_exchange - runoff_LY1

dSoilLY2/dt = transpiration_LY2 + LY1_LY2_exchange - LY2_LY3_exchange - runoff_LY2

dSoilLY3/dt = LY2_LY3_exchange - runoff_LY3

***Energy states***
[TO DO]

All right-hand-side terms, and all associated subcomponents and process formulations, are reported in the individual tech note entries.

.. **Forcing data**

.. The DALEC ID=1100 model forcing data consists of 
.. - Meteorological forcing
..       - Total downward radiation (W/m2)
..       - Total precipitation (mm/day)
..       - Snowfall (mm/day)
..       - Vapor Pressure Deficit (VPD) (hPa)
..       - 2m air temperature (deg C)
..       - Land-surface (skin) temperature (deg C)
.. - Disturbance forcing
..       - Burned area (m2/m2)
..       - C removals from non-fire deforestation (gC/m2/day)
..       - C removals from non-fire degradation (gC/m2/day)
.. - Atmospheric CO2 concentration (ppm CO2).