Changes between Version 8 and Version 9 of Branches/Driver_Improvements

Timestamp:

2014-04-10T11:34:56+02:00 (10 years ago)

Author:

nvuilsce

Comment:

--

Branches/Driver_Improvements

@@ -15 +15 @@
 
 Interpolation
-  * Instantaneous fields and the Long-Wave Radiation are then linearly interpolated for each model time-step t' (typically 1/2 hour) based on the values available at t and t+1 with t < t' < t+1. ''Should we not change that for long-wave radiation so that we have one consistent procedure for scalars and another for fluxes ? ''
+  * Instantaneous fields and the Long-Wave Radiation are then linearly interpolated for each model time-step t' (typically 1/2 hour) based on the values available at t and t+dt with t < t' < t+dt. ''Should we not change that for long-wave radiation so that we have one consistent procedure for scalars and another for fluxes ? ''
   * The Precipitation field is downscaled to model's temporal resolution using a step distribution function with one parameter (nb_spread, that is the number of half-hourly time steps over which we spread the precipitation). nb_spread can vary from 1 (all precipitations over a forcing time period (3 ou 6 hours) are put on the first model time step) to SPLIT_DT (number of integration time steps with a forcing time period, in that case, the precipitation are distributed uniformly). By default, nb_spread is set to 1. This default value is not appropriate for all climates and it would make sense to have typical values for various regions of the world (see thesis of T. d'Orgeval.). 
-  * The Short-Wave radiation is interpolated using a function distribution that corresponds to the solar angle distribution over a forcing time period and conserving the average flux for the [t,t+1] interval. Under low incidence angles this interpolation gives at times strange values, this needs to be checked and improved.
+  * The Short-Wave radiation is interpolated using a function distribution that corresponds to the solar angle distribution over a forcing time period and conserving the average flux for the [t,t+dt] interval. Under low incidence angles this interpolation gives at times strange values, this needs to be checked and improved.
 
 
@@ -33 +33 @@
 
 == Restart the last forcing time step read ==
-As the driver is built now, the first time step read (for the Temperature for instance) is valid for t+1. This means that for a yearly file at a 6-hourly time resolution, the first temperature read is for "1-JAN 06:00". [[BR]]
+As the driver is built now, the first time step read (for the Temperature for instance) is valid for t+dt. This means that for a yearly file at a 6-hourly time resolution, the first temperature read is for "1-JAN 06:00". [[BR]]
 For a simulation starting from scratch (no restart), the driver uses the first value for the second day ("2-JAN 00:00") in order to interpolate with the first one readed (and to calculate half-hourly values between "1-JAN 00:00" and "1-JAN 06:00".
 At the end of a simulation, the last forcing file read is not written in the restart file of the driver. [[BR]]