Article: @@@
Summary:

Improvements to the Community Land Model (CLM) Version 3.5

2.1.1.4. CLM3.5

The simulation of land surface climate by CLM3 was generally adequate, but issues were traced to deficiencies in the hydrological cycle. In 2004, a project was initiated to improve the hydrology in CLM3, resulting in the development of CLM3.5.

Key Improvements in CLM3.5:
- New surface datasets based on MODIS products
- New parameterizations for canopy integration, canopy interception, frozen soil, soil water availability, and soil evaporation
- TOPMODEL-based model for surface and subsurface runoff
- Groundwater model for determining water table depth
- Inclusion of a factor to simulate nitrogen limitation on plant productivity

Outcomes of CLM3.5:
- Significant improvements in the partitioning of global evapotranspiration, resulting in wetter soils, less plant water stress, increased transpiration and photosynthesis, and an improved annual cycle of total water storage
- Generally improved phase and amplitude of the runoff annual cycle
- Dramatic improvements in vegetation biogeography when coupled to a dynamic global vegetation model
- Improved soil hydrology and energy partitioning demonstrated at 15 FLUXNET sites

CLM3.5 was released to the community in May 2007.
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Translation:

Article: @@@
Summary:

Enhancements to the Community Land Model (CLM) Version 3.5

2.1.1.4. CLM3.5

The simulation of land surface climate by CLM3 was generally adequate, yet issues were identified stemming from deficiencies in the hydrological cycle. In 2004, a project was launched to enhance the hydrology within CLM3, leading to the creation of CLM3.5.

Key Enhancements in CLM3.5:
- New surface datasets derived from MODIS products
- New parameterizations for canopy integration, canopy interception, frozen soil, soil water availability, and soil evaporation
- TOPMODEL-based model for surface and subsurface runoff
- Groundwater model for determining water table depth
- Incorporation of a factor to simulate nitrogen limitation on plant productivity

Outcomes of CLM3.5:
- Significant enhancements in the partitioning of global evapotranspiration, leading to wetter soils, reduced plant water stress, increased transpiration and photosynthesis, and an improved annual cycle of total water storage
- Generally improved phase and amplitude of the runoff annual cycle
- Dramatic enhancements in vegetation biogeography when coupled with a dynamic global vegetation model
- Improved soil hydrology and energy partitioning demonstrated at 15 FLUXNET sites

CLM3.5 was released to the community in May 2007.
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