Changes between Version 147 and Version 148 of Documentation/TrunkFunctionality4

Timestamp:

2023-11-24T09:25:36+01:00 (7 months ago)

Author:

luyssaert

Comment:

--

Documentation/TrunkFunctionality4

@@ -193 +193 @@
 Prior to r8316 the parameter describing the tree height for a tree with a diameter of 1 m was PFT-specific. This parameter is used in the calculation of tree height from tree diameter. From r8316 the option TEST_DYNAMIC_HEIGHT has been added. The user can now chose between a fixed PFT-dependent value for PIPE_TUNE2 or to calculate a pixel-dependent value for PIPE_TUNE2. The pixel-dependent value is calculated as a function of precipitation. The underlying approach and parameters are documented in src_parameters/dynamic_parameters.f90. The functionality can be activated by setting TEST_DYNAMIC_HEIGHT=y. Note that this functionality has been coded as a hack because we need to decide which approach we want to use. Only one of the options should be maintained. When running the code with or without TEST_DYNAMIC_HEIGHT the temporal dynamics of tree height vary quite a lot. As a consequence PIPE_TUNE3 is very different. constantes_mtc now defines a pipe_tune3a and pipe_tune3b for the two options. Parameters for the height-precipitation relationship has been fitted on GEDI by making use of CRUJRA. Although these parameters should not be changed/tuned unless the fitting is redone, these parameters (ALPHA_HEIGHT_PRECIP and BETA_HEIGHT_PRECIP) have been externalized.
 
+In r8316 the initial value of precip_longterm was set to 0 and the initial pipe_tune2 value came from the parameter min_pipe_tune2 (7m). In r8318 the initial value of precip_longterm was set to 400/365 (in mm day-1) which results in a pipe_tune2 of ~22m. min_pipe_tune2 is now redundant. Following more testing it needs to be decided which approach should be used to initialize this functionality.
+
 
 === Experiments ===