Model:LTRANS

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LTRANS

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Summary Contact Technical specs In/Output Process Testing Other Component info Also known as Model type Modular Model part of larger framework Note on status model Date note status model 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, Name Elizabeth 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 Name Zachary 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: the NetCDF files from the ROMS hydrodynamic model a comma delimited file that contains the particle locations, 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 Is this a data component Can be coupled with:

Model info Authors Elizabeth North Schlag Source code Go to external source code site Model citations Nr. of publications: 7 Total citations: 538 h-index: 3 m-quotient: 0.17 QR-code Link to this page Other models by author LTRANS

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Nr. of publications:	7
Total citations:	538
h-index:	3
m-quotient:	0.17

Featured publication(s)	Year	Model described	Type of Reference	Citations
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)	2006	LTRANS	Model overview	75
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)	2008	LTRANS	Model overview	331
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