Model:LTRANS

From CSDMS

LTRANS




Metadata

Also known as
Model type Modular
Model part of larger framework
Incorporated models or components:
Spatial dimensions 3D
Spatial extent Landscape-Scale, Reach-Scale, Watershed-Scale
Model domain Coastal, Marine
One-line model description The Larval TRANSport Lagrangian model (LTRANS) is an off-line particle-tracking model that runs with the stored predictions of a 3D hydrodynamic model, specifically the Regional Ocean Modeling System (ROMS).
Extended model description The Larval TRANSport Lagrangian model (LTRANS) is an off-line particle-tracking model that runs with the stored predictions of a 3D hydrodynamic model, specifically the Regional Ocean Modeling System (ROMS). Although LTRANS was built to simulate oyster larvae, it can easily be adapted to simulate passive particles and other planktonic organisms. LTRANS is written in Fortran 90 and is designed to track the trajectories of particles in three dimensions. It includes a 4th order Runge-Kutta scheme for particle advection and a random displacement model for vertical turbulent particle motion. Reflective boundary conditions, larval behavior, and settlement routines are also included. LTRANS was built by Elizabeth North and Zachary Schlag of University of Maryland Center for Environmental Science Horn Point Laboratory. Funding was provided by the National Science Foundation Biological Oceanography Program, Maryland Department of Natural Resources, NOAA Chesapeake Bay Office, and NOAA-funded UMCP Advanced Study Institute for the Environment. Components of LTRANS have been in development since 2002 and are described in the following publications: North et al. 2005, North et al. 2006a, North et al. 2006b, and North et al. 2008.
Keywords:

larval transport model,


First name Elizabeth
Last name North
Type of contact Model developer
Institute / Organization University of Maryland
Postal address 1
Postal address 2
Town / City Cambridge
Postal code MD 21613
State Maryland
Country United States
Email address enorth@umces.edu
Phone
Fax


First name Zachary
Last name Schlag
Type of contact Model developer
Institute / Organization University of Maryland
Postal address 1
Postal address 2
Town / City Cambridge
Postal code MD 21613
State Maryland
Country United States
Email address zschlag@umces.edu
Phone
Fax


Supported platforms Unix, Windows
Other platform
Programming language Fortran90
Other program language
Code optimized Single Processor
Multiple processors implemented
Nr of distributed processors
Nr of shared processors
Start year development 2002
Does model development still take place? Yes
If above answer is no, provide end year model development
Code development status Only maintenance
When did you indicate the 'code development status'? 2020
Model availability As code
Source code availability
(Or provide future intension)
Through web repository
Source web address http://northweb.hpl.umces.edu/LTRANS.htm
Source csdms web address
Program license type Other
Program license type other MIT
Memory requirements --
Typical run time --


Describe input parameters Input files:
  1. the NetCDF files from the ROMS hydrodynamic model
  2. a comma delimited file that contains the particle locations,
  3. comma delimited files that contain habitat boundaries for the Settlement Module. The latter is only needed if the Settlement Module is turned on.
Input format Binary
Other input format NetCDF
Describe output parameters The output can ultimately be used to plot and view the particles and compare the

outcomes of different model runs. There are two types of comma-delimited output files: para and endfile. The para files are created periodically at set intervals throughout the running of the program and contain the particle locations at the current time. The endfile file is created only at the end of the program and contains information regarding each particles’ start location, end location, and ending status.

Output format ASCII
Other output format
Pre-processing software needed? Yes
Describe pre-processing software External Dependencies and Programs. LTRANS requires NetCDF libraries and uses the following programs to calculate random numbers (Mersenne Twister) and fit tension splines (TSPACK). Because LTRANS reads-in ROMS-generated NetCDF (.nc) files, it requires that the appropriate NetCDF libraries be installed on your computer (see files and links below). Also, please note that although the Mersenne Twister and TSPACK programs are included in the LTRANS in the Random_module.f90 and Tension_module.f90, respectively, they do not share the same license file as LTRANS. See also: http://northweb.hpl.umces.edu/LTRANS.htm
Post-processing software needed? No
Describe post-processing software
Visualization software needed? Yes
If above answer is yes Matlab
Other visualization software Surfer/Scripter; see also: http://northweb.hpl.umces.edu/LTRANS.htm


Describe processes represented by the model
Describe key physical parameters and equations
Describe length scale and resolution constraints
Describe time scale and resolution constraints
Describe any numerical limitations and issues


Describe available calibration data sets
Upload calibration data sets if available:
Describe available test data sets See: http://northweb.hpl.umces.edu/LTRANS.htm
Upload test data sets if available:
Describe ideal data for testing


Do you have current or future plans for collaborating with other researchers?
Is there a manual available? Yes
Upload manual if available: Media:LTRANS UsersGuide 5September08.pdf
Model website if any http://northweb.hpl.umces.edu/LTRANS.htm#Forum
Model forum / discussion board [[Model forum::See http://northweb.hpl.umces.edu/LTRANS.htm#Forum]]
Comments


This part will be filled out by CSDMS staff

OpenMI compliant Yes
BMI compliant Yes
WMT component In progress
PyMT component
Can be coupled with:
Model info
Citation indices LTRANS
Nr. of pubs: 4
Citations: 261
h-index: 2
Qrcode LTRANS.png
Link to this page



Introduction

History

References




Citation indices LTRANS
Nr. of pubs: 4
Citations: 261
h-index: 2



Featured publication(s)YearModel describedType of ReferenceCitations
North, E.W.; Hood, R.R.; Chao, S.-Y.; Sanford, L.P.; 2006. Using a random displacement model to simulate turbulent particle motion in a baroclinic frontal zone: A new implementation scheme and model performance tests. Journal of Marine Systems, 60, 365–380. 10.1016/j.jmarsys.2005.08.003
(View/edit entry)
2006LTRANS
Model overview 48
North, Ew; Schlag, Z; Hood, Rr; Li, M; Zhong, L; Gross, T; Kennedy, Vs; 2008. Vertical swimming behavior influences the dispersal of simulated oyster larvae in a coupled particle-tracking and hydrodynamic model of Chesapeake Bay. Marine Ecology Progress Series, 359, 99–115. 10.3354/meps07317
(View/edit entry)
2008LTRANS
Model overview 213
See more publications of LTRANS


Issues

Help

Input Files

Output Files