’s Multiple Element Limitation Model ( MEL) was originally written in Borland Delphi for IBM PC compatibles. In 2012 MEL was rewritten in the open source IDE Lazarus. You do not need Delphi or Lazarus to run the MEL model under Microsoft Windows. If you want to make changes to the MEL equations you will need Delphi or Lazarus. Versions of MEL written in Delphi will only run Microsoft Windows. Versions written in Lazarus can be compiled for Microsoft Windows, Apple OS X, or Linux. The Lazarus IDE supports the Linux operating system, MEL should run under Linux but we have not tested it extensively.
Each version of MEL is packaged into a zip file. The zip file contains the full source code, the MEL Windows executable, and sample parameter and driver files. Before running MEL unzip the files into an empty directory.
Unless explicitly stated otherwise, parameter files created in one version of the MEL arenotcompatible with another version.
Acceptable Use Policy
The software provided on this page has been tested under the Windows and OS X operating systems. However, its stability under all conditions cannot be guaranteed. The user assumes all risk for its use.
Downloading and using the software requires that:
- The Principal Investigator is sent a notice stating the model version downloaded.
- The user regularly checks this web site for updated software.
- The Principal Investigator of the model be sent a copy of the report or manuscript prior to submission and be adequately cited in any resultant publications.
- A copy of any resultant publications should be sent to:
Edward Rastetter
Ecosystems Center
Marine Biological Laboratory
Woods Hole, MA 02543
Versions Available for Download
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MEL Version III
Multiple species version with N fixation and DON fluxes, annual time step
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| Contains: MELprogram, source code, sample parameter and driver files |
Created in: Delphi 5, update 1. Uses TMS Softwares TAdvstringgrid |
: MEL III5sp.zip |
Relevant Citations: Original multiple species version – Herbert et al., 1999; N fixaton – Rastetter et al., 2001; DON losses – Rastetter et al., 2005 |
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MEL Version III.5
Daily MEL with single soil layer
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| Contains: MELprogram, source code, sample parameter and driver files |
Created in: Delphi 5, update 1. Uses TMS Softwares TAdvstringgrid version v3.4.8.6 |
: MEL v3.5.zip(single soil layer) |
Relevant Citations: None |
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MEL Version IV.2
Daily MEL with eight resources (Delphi version)
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| Contains: MELprogram, source code, sample parameter and driver files |
Created in: Delphi 2007. Uses TMS Softwares TAdvstringgrid version 4.5.0.5. |
: MEL v4.2.zip |
Relevant Citations: None |
| Contains: MELprogram, source code, sample parameter and driver files with new Uws. |
Created in: Delphi 2007. Uses TMS Softwares TAdvstringgrid version 4.5.0.5. |
: MEL v4.2.new Uws.zip |
Relevant Citations: None |
MEL Version IV.3
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Daily MEL with eight resources (Delphiand Lazarus)
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| Contains: MELprogram, source code, sample parameter and driver files |
Created in: Delphi 2007. Uses TMS Softwares TAdvstringgrid version 4.5.0.5. |
: MEL 4.3.zip |
Relevant Citations: Rastetter et. al., 2013 |
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Created in:
Modelshell: Lazarus v1.2.4.
Create Equations: Lazarus v1.2.4 plus TRichmemo v1.0 |
File: MEL 4.3L.zip
(available soon) |
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MEL Version V
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Annual MEL
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| Contains: MEL program, sample parameter and driver files |
Created in: Modelshell: Lazarus v1.2.4. Create Equations: Lazarus v1.2.4 plus TRichmemo v1.0 |
: MEL 5.0.zip |
Relevant Citations: Rastetter et al., in prep |
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This material is based upon work supported by the National Science Foundation under grants #OPP-9318529, OPP-9732281, DEB-9509613, DEB 0716067 (OPUS), DEB-0108960, ARC-0806329, EF-1065587, ARC-0856853, and DEB-0949420 and the Environmental Protection Agency under grants RFQ-RT-00-00107 and QT-RT-00-001667. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation or the Environmental Protection Agency.