Difference between revisions of "Forest management/Data uncertainties limitations"

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===Limitations===
 
===Limitations===
 
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Timber demand in IMAGE 3.0 is the sum of the demand for sawlogs, pulpwood and fuelwood. This total demand is than used in harvesting forests across the world, without knowing anymore the underlying wood types. So, forest plantations, for example, can used to fulfill the demand for either sawlogs of fuelwood. For specific assessments (e.g. for timber use for modern biomass), it would have been useful to remain the three wood types in the allocation.  
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Timber demand in IMAGE 3.0 is the total demand of sawlogs, pulpwood and fuelwood. The demand is fulfilled by harvesting wood from any type of forest without specifying the original source of demand. This can be relevant as different types of wood are used for timber, pulp and fuel. For specific assessments it would be useful to include this detail in the allocation of forestry.
  
The timber demand in a region is the sum of local/regional demands and timber claims by other regions. The trade assumptions are adopted from external models, limiting the application of the model for cases with regional timber scarcity (which will change the total demand in a region).
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The timber demand in a region is the sum of local/regional demands and timber claims by other regions. The trade assumptions are adopted from external models, limiting the application of the model for cases with regional timber scarcity.
  
 
The only driver of deforestation modelled in IMAGE 3.0 is the net expansion of
 
The only driver of deforestation modelled in IMAGE 3.0 is the net expansion of
 
agriculture per region. Many drivers of deforestation are not related to agricultural
 
agriculture per region. Many drivers of deforestation are not related to agricultural
 
expansion, but there is no global assessment of these other drivers. Therefore, total
 
expansion, but there is no global assessment of these other drivers. Therefore, total
deforestation rates are calibrated in IMAGE. Drivers and extent of deforestation are very
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deforestation rates in IMAGE are calibrated to FAO deforestation rates. Drivers and extent of deforestation are very uncertain and subject to debate, yet determine future deforestation and deforestation emissions in scenario simulations.
uncertain and subject to debate, yet determine future deforestation and deforestation
 
emissions in scenario simulations.
 
 
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Revision as of 12:02, 14 December 2016

Forest management module in IMAGE 3.0
Flowchart Forest management. See also the Input/Output Table on the introduction page. The option of forest plantations in IMAGE and LPJmL is still under development, and expected to be available soon.