History of Changes

History of Changes

This hypertext document traces its origins to the hardcopy 1994 PCMDI Report No. 18, "A Summary Documentation of the AMIP Models" by Thomas J. Phillips. Substantive changes (listed in reverse chronological order) since the publication of PCMDI Report No. 18 include:

  • Change in "vintage" year of MPI ECHAM4 (T42 L19) model from 1995 to 1996 (May 1998)
  • Clarification of method for determining surface evaporation beta parameter in Land Surface Processes of UKMO HADAM1 (2.5x3.75 L19) 1993 model (May 1998)
  • Addition of WWW URL for the Canadian Climate Centre--now the Canadian Centre for Climate Modeling and Analysis (April 1998)
  • Addition of information on treatment of mean land-surface temperature in the CNRM ARPEGE Cy11 (T42 L30) 1995 model (September 1997)
  • Addition of WWW URL for Japan Meteorological Agency (June, 1997)
  • Change of AMIP representative for the GSFC modeling group (December, 1996)


Release of Hypertext Version 1.3 (November 15, 1996)

  • Update of WWW URL in the LLNL model report (November, 1996)
  • Provision of greater detail on orographic smoothing of selected models in Table 2-5 (November, 1996)
  • Change of UKMO model designation from UKMO UM-Climate1 (2.5x3.75) 1993 to UKMO HadAM1 (2.5x3.75) 1993 (October, 1996)
  • Documentation of model MPI ECHAM4 (T42 L19) 1995 used for AMIP revisit experiment (October, 1996)
  • Update of e-mail addresses of AMIP representatives for MPI (October, 1996)
  • Update of World Wide Web URL in NCAR CCM2 model report (September, 1996)
  • Documentation of model CSU CSU95 (4x5 L17) 1995 used for AMIP revisit experiment (September, 1996)
  • Clarifications of descriptions of atmospheric dynamics, planetary boundary layer, and surface fluxes in report on model CSU CSU91 (4x5 L17) 1991 (September, 1996)
  • Correction of errors in description of threshold precipitation parameters in model LMD LMD5 (3.6x5.6) 1991 (August, 1996)
  • Documentation of companion models BMRC BMRC3.7 (R31 L17) 1995 and BMRC BMRC3.7.1 (R31 L17) 1995 used for AMIP revisit experiments (August, 1996)
  • Correction of BMRC BMRC2.3 (R31 L9) 1990 entry for roughness effects of snow cover in Table 2-13.
  • Update of WWW URL, phone and fax numbers for BMRC modeling group representative (August, 1996)
  • Documentation of model NTU GCM (T42 L13) 1995 of the National Taiwan University, a new AMIP modeling group (August, 1996)
  • Documentation of model CCSR/NIES AGCM (T21 L20) 1995 of the Center for Climate System Research, a new AMIP modeling group (August, 1996)
  • Addition of description of special treatment of roughness lengths and surface fluxes for sea-ice leads in baseline model DERF GFDLSM392.2 (T42 L18) 1993; documentation of model DERF GFDLSM195 (T42 L18) 1995 used for repeated AMIP experiment (August, 1996)
  • Update of e-mail address for UKMO AMIP representative (July, 1996)
  • Additions to Acronyms Glossary: ARPEGE, ISBA, LAI, LLNL/UCLA, SECHIBA, SiB (June, 1996)
  • Documentation of model CNRM ARPEGE Cy11 (T42 L30) 1995 used for AMIP revisit experiment (June, 1996)
  • Addition of information on time integration scheme and snow cover and correction of force-restore time constant for land surface processes in summary report for model CNRM EMERAUDE (T42 L30) 1992 (June, 1996)
  • Addition of information in report on initialization of model MRI GCM-IIb 4x5L15 (May, 1996)
  • Documentation of model DNM A5407.V2 (4x5 L7) 1995 (May, 1996)
  • Documentation of model LLNL/UCLA MPP1 (4x5 L15) 1995 of the Lawrence Livermore National Laboratory, a new AMIP modeling group (May, 1996)
  • Documentation of model NRL NOGAPS3.4 T47L18 used for AMIP revisit experiment (May, 1996)
  • Model NRL NOGAPS3.2 T47L18 report: changes in description of atmospheric dynamics (May, 1996)
  • Change of AMIP representative for YONU modeling group; documentation of model YONU Tr7.1 4x5L7 used for AMIP revisit experiment (May, 1996)
  • Inclusion of "vintage year" in all model designations (April, 1996)
  • Documentation of Models LMD LMD6b 3.6x5.6L11 and LMD LMD6s 3.6x5.6L11 used for AMIP revisit experiments (April, 1996)
  • Model LMD LMD5 3.6x5.6L11 report: change of AMIP representative, citation of additional model documentation, more information on horizontal advection scheme and surface flux parameterization: correction of surface emissivity (= 0.960) in LMD model entries in Table 2.14 (April, 1996)
  • NCAR model report: addition of WWW address of summaries of CCM2 experiments (March, 1996)
  • Comprehensive Reference Bibliography: addition of alphabetical links by first author (March, 1996)
  • Model SUNYA/NCAR GENESIS1.5 T31L18 report: addition of WWW URL for related GENESIS models , update of Wang et al. (1995) reference (March, 1996)
  • MGO model report: update of AMIP representative's e-mail address (February, 1996)
  • BMRC model report: addition of WWW URL (February, 1996)
  • CSIRO model report: addition of WWW URL (February, 1996)
  • Documentation of Model SUNYA/NCAR GENESIS1.5A T31L18 used for AMIP revisit experiment (January, 1996)
  • UKMO model report: change of AMIP representative (December, 1995)
  • SUNYA/NCAR model references: update of Pollard and Thompson (1995) reference (November, 1995)
  • Documentation of Model MRI GCM-IIb 4x5L15 used for AMIP revisit experiment; update of Kitoh et al. (1995) reference (November, 1995)
  • Tables 2-1 to 2-15: substitution of HTML 3.0 tables for gif-images and inclusion of hyperlinks to relevant sections of AMIP model summary reports (November, 1995)
  • Inclusion of model version designation in the title of each model report and in the Main Document Directory (November, 1995)
  • UKMO model report: addition of WWW URL (October, 1995)
  • ECMWF model report: addition of WWW URL (October, 1995)
  • SUNYA model report: substition of WWW URL for Internet Gopher address (October, 1995)

Release of Hypertext Version 1.2 (August 10, 1995)

  • UIUC model report: update of WWW URL (August, 1995)
  • SUNYA model report: addition of Internet Gopher address (August, 1995)
  • UCLA model report: addition of WWW URL (July, 1995)
  • LMD model report: addition of WWW URL (July, 1995)


Release of Hypertext Version 1.1 (June 30, 1995)

  • BMRC model report: addition of Bureau of Meteorology Internet Gopher address (June 1995)
  • CNRM model report: changes in descriptions of schemes for smoothing/filling, radiation, and land surface processes (June, 1995)
  • Table 1-1 (AMIP modeling groups) : addition of the Center for Climate Systems Research (CCSR), and of WWW URLs for other modeling groups (June, 1995)
  • GISS model references: addition of hyperlinks to abstracts of selected references on GISS WWW pages (June, 1995)
  • References: correction of year (from 1994) for Betts and Miller (1993) reference and addition of page information (June, 1995)
  • CCC model report and associated pages: Change of group name (May, 1995)
  • YONU model report and references: change of Oh and Jung (1993) reference to Oh et al. (1994) reference (May, 1995)
  • NRL model report: addition of World Wide Web URL (May, 1995)
  • MRI model report: change of World Wide Web URL (May, 1995)
  • DERF model report: change of AMIP representatives (May, 1995)
  • CNRM model report: change of AMIP representative and fax number, and addition of World Wide Web URL (May, 1995)


Release of Hypertext Version 1.0 (May 12, 1995)

  • Addition of World Wide Web URL's to COLA, CSU, DERF, GFDL, GISS, GSFC, GLA, MPI, MRI, NCAR, NMC, UGAMP, and UIUC model reports (May 1995)
  • NCAR model report: addition of information on electronic transfer of documentation for the CCM2 model and CCM processor, and of source code for an improved version of the CCM2 model (May 1995)
  • UIUC model report: change in description of convection and related references(May 1995)
  • COLA model report: change in description of land surface processes (May 1995)
  • CSU model report: changes in descriptions of precipitation and surface characteristics(May 1995)
  • SUNYA/NCAR model report: updates of Wang et al. (1995) and Pollard and Thompson (1995) references and changes in descriptions of horizontal resolution, chemistry, sea ice, and snow cover (May 1995)
  • UGAMP model report: modification of communications for AMIP representatives and changes in descriptions of convection and cloud formation (May 1995)
  • MRI model report: change of AMIP representatives and addition of Kitoh (1995) reference (May 1995)
  • DERF model report: addition of reference to Stern and Miyakoda (1995)
  • UKMO model report: changes in phone/fax numbers and in e-mail address for AMIP representative C. Hall, and changes in description of vertical resolution (May 1995)
  • NMC model report: change of e-mail address for AMIP representative H. van den Dool and addition of Savijarvi (1995) reference (May 1995)
  • ECMWF model report: changes in phone and fax numbers and in the e-mail address of AMIP representative L. Ferranti, and changes in the descriptions of diffusion, convection, and land surface processes (May 1995)
  • MGO model report: change in fax number (May 1995)
  • DNM model report: change in e-mail address for AMIP representative V. Galin (March 1995)
  • Table 2-1 (Model representation/resolution): correction of designation of UCLA model horizontal representation (January 1995)
  • References: update of Hack (1994), Hack et al. (1994), and Kiehl et al. (1994) references (January 1995)
  • References: inclusion of a model-specific References section with each model report; update of Chalita and Le Treut (1994), Slingo et al. (1994), and Williamson and Rasch references; and correction of Fels and Schwartzkopf (1975) reference (October 1994)


Publication of PCMDI Report No. 18 (April 1994)


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Last update May 27, 1998.

Users are encouraged to report any technical problems (e.g., broken hyperlinks) or errors of content in the present summary documentation to:

Tom Phillips (phillips@tworks.llnl.gov)
Program for Climate Model Diagnosis and Intercomparison (PCMDI)
Lawrence Livermore National Laboratory
L-264, P.O. Box 808
Livermore, California (USA) 94551

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