Archived VIC Releases
Contents:
- Overview of Recent VIC Versions
- List of Archived Versions
- How to Check Which Version of VIC You're Running
Overview of Recent VIC Versions
VIC development branched into 2 parallel paths at release 4.0.3. The 4.0.x branch has continued development of the same basic feature set, while the 4.1.x branch has incorporated new model algorithms including spatially-distributed soil ice and snow cover, a lake model, and permafrost processes.
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VIC Releases 4.0.0 - 4.0.6 all contain the same basic feature set:
VIC Releases 4.1.0 and 4.1.1 contain several new features, including:
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Schematic of recent VIC versions and their features. |
VIC Version 4.1.1 is the sucessor to both 4.0.6 and 4.1.0.
- Unfortunately, VIC versions 4.0.6 and 4.1.0 are not compatible
- Some of Version 4.1.0's new features broke older features, for example 24-hour water balance mode
- Version 4.1.1 has the "best" of both versions
- Results from versions 4.0.6 and 4.1.0 can (mostly) be reproduced with version 4.1.1
- Version 4.1.1 offers further improvements:
- 6 kinds of potential evapotranspiration
- Improved lake/wetland model (lake parameters have changed)
More information on VIC Version 4.1.1 can be found here.
List of Archived Versions of VIC
These versions of VIC are available upon request.
- VIC 4.1.0 Beta 5
- VIC 4.1.0 Beta 4
- VIC 4.1.0 Beta 3
- VIC 4.1.0 Beta 2
- VIC 4.1.0 Beta 1
- VIC 4.0.6
- VIC 4.0.5
- VIC 4.0.4
- VIC 4.0.3
- VIC 4.0.1
- VIC 4.0.0
- VIC 3.2.1
VIC 4.1.0 Beta 5 (22-Jun-2008) Request Source Code
New Features:
- Updated lake model
- Lake drainage is now parameterized as flow over a broad-crested wier
- 2-layer snow pack model for snow on top of lake ice, consistent with upland snow pack model
- New format for lake parameter file, as a result of new drainage parameterization
- Option to use improved snow density algorithm, taken from SNTHERM89
- Option to use snow albedo decay algorithm of Sun et al. 1999
Bugs Fixed:
- The code can now handle very shallow lakes without crashing
- Correct soil ice fractions for the case when FROZEN_SOIL = TRUE and options.SNOW_BAND > 1
- Fixed incorrect setting of NOFLUX in calc_surf_energy_bal()
- 24h water balance mode results have been reconciled with those of 4.0.6
Known Issues:
- Water balance errors for DIST_PRCP = TRUE
VIC 4.1.0 Beta 4 (23-Oct-2007) Request Source Code
New Features:
- Flexible output configured via the global control file
- Optional headers for input and output files
- Optional aggregation to daily timestep of output variables
- Optional ALMA compliant input and output
- Sample global parameter file included with source code, including examples of flexible output configuration
- STATEFILE option is now specified in global control file, not the user_def.h
- State files are now saved at the end of the final timestep of the state file save date
- ARNO_PARAMS global option is now BASEFLOW, with the following behavior:
- When BASEFLOW is ARNO, the standard baseflow parameters are read from the soil file
- When BASEFLOW is NIJSSEN2001, the baseflow parameters from Nijssen et al (2001) are read from the soil file
- LAKE_MODEL compile-time option (in user_def.h) has been removed
- CONTINUEONERROR option (in global parameter file) allows model to continue simulating other grid cells in domain after encountering an error
- Permafrost-related features, including:
- Optional exponential distribution of soil thermal nodes
- Implicit solution of soil temperature profile
- Simulation of loss of ground ice via EXCESS_ICE option
Bugs Fixed:
- Fixes to water balance errors in lake model
- Fixed water balance errors arising in 24-hour water balance mode
- Fixed errors in baseflow calculation
Known Issues:
- QUICK_FS option does not work
VIC 4.1.0 Beta 3 (13-Sep-2006) Request Source Code
New Features:
- Improved lake model, including:
- More flexible default lake profile, ranging from parabolic to square
- Computation of blowing snow sublimation over lakes
- Support for ALMA input and output variables:
- Automatically understands ALMA input variables: PSURF, QAIR, TAIR, RAINF, SNOWF in addition to standard VIC input variables
- New ALMA_OUTPUT global parameter file option; when TRUE, VIC writes output variables conforming to the ALMA convention
- New stand-alone program vicInterp
- Reads daily forcings (PREC, TMAX, TMIN, WIND) and outputs sub-daily forcings
- Essentially a stripped-down version of VIC (compiled with the OUTPUT_FORCE option)
- vicInterp can be compiled simply by typing "make interp" in the vic source code directory
Bugs Fixed:
- Fix large water balance errors in daily water balance mode when snow is present
- Lake model crashes when lakes dry up and when large (>97% of grid cell) lakes fill up
- Lake model state not saved in state files
- Aerodynamic resistance written to output files is not the actual aerodynamic resistance used in flux computations
- Global parameter "ARNO_PARAMS" renamed to "NIJSSEN2001_BASEFLOW" to reflect its true meaning
- Users should replace "ARNO_PARAMS" with "NIJSSEN2001_BASEFLOW" in their global parameter files
- VIC will still accept ARNO_PARAMS for now, but it will be phased out in the next release
VIC 4.1.0 Beta 2 (18-Oct-2004) Request Source Code
This release contains several modifications compared to 4.1.0 Beta 1, including many of the fixes added to 4.0.5.
New Features:
- "-v" and "-o" command-line options, for displaying your VIC version and values of compile-time options
- Automatic recompilation on updates to *.h
- NEW_ARNO_TYPE global option is now ARNO_PARAMS. NOTE: When ARNO_PARAMS is TRUE, baseflow parameters from Nijssen et al (2001) are read from the soil file. When ARNO_PARAMS is FALSE, standard baseflow parameters are read from the soil file. We apologize for this confusing behavior; this will be fixed in the final release of VIC 4.1.0.
Bugs Fixed:
- Spurious condensation at low temperatures
- Validation of initial soil moisture
- Incorrect baseflow limits
- Runs using initial state files starting at state file date rather than global start date
- Incorrect sublimation values for BLOWING option
- Negative incoming shortwave radiation at high latitudes
- Undefined daily precipitation for deserts
- Snow_flux incorrectly set to Tcanopy in fluxes output file
- Incorrect value for sub_snow in fluxes output file
Known Issues:
- Lake model crashes when lakes dry up and when large (>97% of grid cell) lakes fill up
- Lake model does not function properly with multiple snowbands per cell
- Lake model must be run at sub-daily timestep; daily water balance runs cannot run lake model
- Lake model state not saved in state files
- Large water balance errors in daily water balance mode when snow is present
- COMPUTE_TREELINE option does not function
- Aerodynamic resistance written to output files is not the actual aerodynamic resistance used in flux computations
VIC 4.1.0 Beta 1 (30-Jul-2003) Request Source Code
Original implementation of the 4.1.x branch.
Known Issues:
- Lake model does not function properly with multiple snowbands per cell
- Lake model crashes when lakes dry up and when large (>97% of grid cell) lakes fill up
- Lake model must be run at sub-daily timestep; daily water balance runs cannot run lake model
- Lake model state not saved in state files
- COMPUTE_TREELINE option does not function
- Large water balance errors in daily water balance mode when snow is present
- Aerodynamic resistance written to output files is not the actual aerodynamic resistance used in flux computations
- Spurious condensation at low temperatures
- Incorrect baseflow limits
- Incorrect sublimation values for BLOWING option
- Negative incoming shortwave radiation at high latitudes
- Undefined daily precipitation for deserts
- Snow_flux incorrectly set to Tcanopy in fluxes output file
- Incorrect value for sub_snow in fluxes output file
VIC 4.0.6 (19-Jan-2008) Request Source Code
New Features:
- Flexible output configured via the global control file
- Optional headers for input and output files
- Optional aggregation to daily timestep of output variables
- Optional ALMA compliant input and output
- Sample global parameter file included with source code, including examples of flexible output configuration
- STATEFILE option is now specified in global control file, not the user_def.h
- State files are now saved at the END of the final timestep of the state file save date
- 0-area snow/elevation bands now omitted from state files
- ARNO_PARAMS global option is now BASEFLOW, with the following behavior:
- When BASEFLOW is ARNO, the standard baseflow parameters are read from the soil file
- When BASEFLOW is NIJSSEN2001, the baseflow parameters from Nijssen et al (2001) are read from the soil file
- Improved validation of global parameter file options to prevent bad parameter choices
Bugs Fixed:
- Fixed incorrect reporting of aerodynamic resistance in output files (stability correction had been neglected)
- Fixed failure to skip over deactivated grid cells when reading state files
- Fixed incorrect reading/writing of state files when QUICK_FLUX is TRUE
- Fixed incorrect output file open/close for OUTPUT_FORCE option
- Fixed incorrect interpolation of sub-daily air temperature when referencing GMT instead of local time
- Fixed various memory errors and leaks
- Fixed bugs in baseflow calculations related to previous baseflow bug fixes
Known Issues:
- On some systems, source files do not automatically recompile when .h files are modified
VIC 4.0.5 (8-Oct-2004) Request Source Code
New Features:
- "-o" command-line option for displaying values of compile-time options
- Automatic recompilation on updates to *.h
- Optional July average temperature field in soil parameter file (for use with COMPUTE_TREELINE option)
Bugs Fixed:
- Spurious condensation at low temperatures
- Validation of initial soil moisture
- Incorrect baseflow limits
- Runs using initial state files starting at state file date rather than global start date
- Negative incoming shortwave radiation at high latitudes
- Undefined daily precipitation for deserts
VIC 4.0.4 (5-Dec-2003) Request Source Code
New Features:
- "-v" command-line option for displaying your VIC version
- Ability to use baseflow parameters from Nijssen et al (2001) in soil file, via ARNO_PARAMS global option. NOTE: When ARNO_PARAMS is TRUE, baseflow parameters from Nijssen et al (2001) are read from the soil file. When ARNO_PARAMS is FALSE, standard baseflow parameters are read from the soil file. We apologize for this confusing behavior; this will be fixed in the final release of VIC 4.1.0.
- Ability to specify treeline, via COMPUTE_TREELINE global option (prevents formation of glaciers in some areas)
- Different snow albedo curves for accumulation and melting
- Ability to handle ASCII state files
Bugs Fixed:
- Fixes to incorrect indexing during sub-model time step snow calculations
- Incorrect reading/writing of state files
VIC 4.0.3 (15-Aug-2000) Request Source Code
VIC 4.0.1 (30-May-2000) Request Source Code
VIC 4.0.0 (16-May-2000) Request Source Code
VIC 3.2.1 (1999) Request Source Code
Version Check
To check which release of VIC you are running:
VIC releases 4.0.4 and later (and all 4.1.x releases):
- Type "vicNl -v"
VIC releases 4.0.3 and earlier, and VIC 4.1.0 Beta 1: You must use the version header file to check your routines:
- Run "grep Id *.c > ver_old.txt" in the directory with your current source code.
- Get the most recent version header file, if you did not download the entire source code package.
- Use xemacs file compare, sdiff, diff, or another file comparison package to compare the two header files for differences.
- Modified files can then either be directly substituted, or a compare can be run between the complete source files to identify the exact differences.
VIC Administrator Last modified: Tue Aug 25 12:29:33 PDT 2009