Changes between Version 156 and Version 157 of DevelopmentActivities/ORCHIDEE-DOFOCO


Ignore:
Timestamp:
2018-02-17T18:17:21+01:00 (6 years ago)
Author:
luyssaert
Comment:

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  • DevelopmentActivities/ORCHIDEE-DOFOCO

    v156 v157  
    238238When stands grow old the tree density decreases and under certain conditions the LAI can no longer cover the ground area. When this happens productivity will start to decrease. In nature the decrease in LAI comes with an increase in the amount of light reaching the forest floor which enables seedlings to grow and to restore the LAI. This process is known as recruitment. Note that in managed forest and forest with a lot of stand replacing disturbances (for example, fire) the forest may never reach the stage where the canopy sufficiently opens up to enable recruitment. 
    239239 
    240 ORCHIDEE-CN-CAN can simulate recruitment for each PFT separatly by setting '''recruitment_pft_xx''' to true or false. When using age classes it makes sense to have the same setting for all age classes of the same species. When developing and testing the code it was considered too time consuming to change the settings at the PFT level so a flag ignoring the setting for recruitment_pft_xx was introduced. If the '''recruitment''' flag is set to true, the settings of recruitment_pft_xx will be used. If the '''recruitment''' flag is set to false, the settings of recruitment_pft_xx will be ignored and the model runs without recruitment. 
     240ORCHIDEE-CN-CAN can simulate recruitment for each PFT separatly by setting '''recruitment_pft_xx''' to true or false. When using age classes it makes sense to have the same setting for all age classes of the same species. When developing and testing the code it was considered too time consuming to change the settings at the PFT level so a flag ignoring the setting for recruitment_pft_xx was introduced. If the '''ok_recruitment''' flag is set to true, the settings of recruitment_pft_xx will be used. If the '''ok_recruitment''' flag is set to false, the settings of recruitment_pft_xx will be ignored and the model runs without recruitment. 
    241241 
    242242Recruitment has been developed, tested and validated for tropical forests. There is no reason why it shouldn't work for other forests but that needs to be confirmed. At present recruitment was introduced at the PFT level. It probably makes more sense to link it to the management strategy than to the PFT. This needs to be checked. 
    … …  
    246246 
    247247=== Soil maps === 
     248ORCHIDEE-CN-CAN runs for two soil maps: zobler (3 soil types) and usda (12 soil types). The usda map will become the default setting in the near future. The code had to be adjusted in sechiba_hydrol_architect.f90 and stomate_windthrow.f90. The soil map can be selected in the run.def by setting the value for '''soiltype_classif''': 
     249{{{ 
     250SOILTYPE_CLASSIF= usda  
     251}}} 
     252or  
     253{{{ 
     254SOILTYPE_CLASSIF= zobler 
     255}}} 
    248256 
    249257=== Single layer vs multi layer energy budget === 
    … …  
    331339 
    332340=== Wind throw === 
    333 EXPLAIN 
     341The calculation of wind storm damage can be activated by setting '''ok_windthrow''' to y in the run.def. This module calculated the critical wind speed of a stand taking stand and soil properties into account. If the stand is managed, the damaged trees are salvaged logged. If the stand is unmanaged the damaged  trees are left on-site to decompose. The default setting for ok_windthrow is n.