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Notebook","category":"Hydrosphere","sub_category":"Ocean Carbon and Temperature","monthly_downloads":0,"total_dependent_repos":0,"total_dependent_packages":0,"readme":"**CITATION**\n\n- If you use any CO2SYS related software, please cite the original work by Lewis and Wallace (1998).\n- If you use CO2SYS.m, please cite van Heuven et al (2011).\n- If you use errors.m or derivnum.m, please cite Orr et al. (2018).\n\n**CO2SYS-MATLAB versions**\n\n- 1.1   (Sept 2011): van Heuven et al. (2011) \n- 2.0   (20 Dec 2016): includes uncertainty propagation\n- 2.0.1 (11 Oct 2017): supports TEOS-10 standards (conservattive temperature, absolute salinity)\n- 2.0.2 (17 Oct 2017): Octave enhancements changed to be MATLAB compatible\n- 2.0.3 (4 Jun 2018): examples added as Jupyter notebooks\n- 2.0.4 (10 Nov 2018): defaults for standard uncertainties in constants (epK vector and eBt) made consistent with Orr et al. (2018), i.e., final published version \n- 2.0.5 (23 Nov 2018): fixed bug in eBt propagation to deriv array (thanks A. Cochon)\n- 2.1   (29 Jun 2020): fixed bug in derivnum affecting OUT results (linked to TEMPOUT); masked derivs of input vars in derivnum\n\n**ABOUT CO2SYS**\n\nHere you will find a MATLAB-version of CO2SYS, originally written for\nDOS. CO2SYS calculates and returns a detailed state of the carbonate system for\noceanographic water samples, if supplied with sufficient input.  Use the CO2SYS\nfunction as you would use any other MATLAB inline function, i.e.,\na=func(b,c). For much detail about how to use CO2SYS, simply type \"help CO2SYS\"\nin MATLAB.  The help function also works for the two new uncertainty propagation\nroutines (errors and derivnum).  For details on the internal workings of CO2SYS,\nplease refer to the original publication (Lewis and Wallace, 1998) available at\nhttp://cdiac.ornl.gov/oceans/co2rprt.html.  Since CO2SYS and the two new\nroutines each allow input of vectors, with just one call they can process many\nsamples.  Each sample may have a different salinity, temperature, pH scale,\ndissociation constants, etc.\n\n**HISTORY**\n\nThe original version for DOS was written by Lewis and Wallace\n(1998). That was translated to MATLAB by Denis Pierrot at CIMAS,\nUniversity of Miami, Miami, Florida. Then that code was vectorized,\nrefined, and optimized for computational speed by Steven van Heuven,\nUniversity of Groningen, The Netherlands. Although functionality was\nadded, the output of the CO2SYS function has not changed in form. All\nversions of CO2SYS that are available at CDIAC (DOS, Excel, MATLAB)\nshould produce nearly identical results when supplied with identical\ninput. Indeed, close agreement between these different versions of\nCO2SYS was demonstrated by Orr et al. (2015).  More recently,\nCO2SYS-MATLAB has been modified to include uncertainty propagation\n(Orr et al., 2018): the main routine CO2SYS.m was altered slightly,\nwhile two new routines were added (errors.m and derivnum.m)\n\nIf you discover inconsistencies or have a more general bug report for\nCO2SYS.m, please notify S. van Heuven (svheuven at gmail.com), Denis\nPierrot (Denis.Pierrot at noaa.gov), or Alex Kozyr (kozyr at\nornl.gov). For any concerns about the uncertainty propagation routines\n(errors.m and derivnum.m), please contact James Orr (james.orr at\nlsce.ipsl.fr)\n\n**INSTALLING**\n\nDownload the m-files in the src directory (CO2SYS.m, errors.m, and derivnum.m);\nyou may also wish to download the examples in the examples directory.  Place\nthese files in a local directory that is in MATLAB's search path, or add the\ndirectory where they are located to MATLAB's search path. The latter can be\ndone with MATLAB's addpath command, for example\n\naddpath (\"my_matlab_directory/my_subdir\")\n\nThen run either of the examples in Matlab, or start using the CO2SYS routine\nstraight away.\n\n**COMPATIBILITY**\n\nBesides their use in MATLAB, the three functions (CO2SYS.m, derivnum.m, and\nerrors.m) also work well under octave, GNU's MATLAB clone.\n\n**EXAMPLES**\n\nExample MATLAB scripts demonstrating use of CO2SYS can be found in the\nexamples directory. Using the two new routines is similar, adding only\na few new arguments, e.g., for input uncertainties.  More elaborate\nexamples are also available in another form in the 'notebooks'\ndirectory. Either click on those files to visualize them (as HTML) or\ndownload those files and use them interactively as jupyter\nnotebooks. Within MATLAB or octave, you may also use the native help\nfacility, i.e., by typing \"help errors\" or \"help derivnum\" to find out\nmore.\n\n**REFERENCES**\n\nLewis, E. and Wallace, D. W. R. (1998) Program Developed for CO2\nSystem Calculations, ORNL/CDIAC-105, Carbon Dioxide Inf.  Anal. Cent.,\nOak Ridge Natl. Lab., Oak Ridge, Tenn., 38 pp.,\nhttps://salish-sea.pnnl.gov/media/ORNL-CDIAC-105.pdf\n\nOrr, J. C., J.-P. Gattuso, and J.-M. Epitalon (2015) Comparison of ten\npackages that compute ocean carbonate chemistry, Biogeosciences, 12,\n1483–1510, https://doi.org/10.5194/bg-12-1483-2015 .\n\nOrr, J.C., J.-M. Epitalon, A. G. Dickson, and J.-P. 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