History of Changes Made to IPCC Standard Output
16 October 2007:
Corrected notes for entry 44 in table A1a (clivi) to indicate that only the solid-phase water (not the liquid or vapor)should be considered in calculating the atmosphere cloud ice content.
15 September 2005:
Added accommodation for the hybrid height coordinate, which appears in the Hadley Centre models. Also included depth coordinate for ocean fields, which had been previously inadvertently omitted.
7 December 2004:
Added the following clarification for the global_average_thermosteric_sea_level_change: "In a rigid-lid model this quantity can be calculated by using a reference 3D salinity field to compute density as the 3D temperature field evolves."
Added a recommendation that daily mean data be computed for intervals beginning at midnight, i.e., 0 Z (UTC), and ending the following midnight at 0 Z.
22 November 2004:
Replace occurrences of zostogm with zostoga and zosgm with zosga.
17 November 2004:
Clarified how zos should be computed.
Added zostoga and zosga to list of high priority output variables (Table O1c).
Added to Table O1d the "qflux" as a high priority field for slab ocean experiments.
Added monthly-mean tasmin and tasmax to Table A1f.
For mrfso, indicated explicitly in the comment column that it was frozen water only that should be considered.
Expanded descriptions of clwvi and clivi.
Indicated that ISSCP simulator output should be generated from data sampled no less frequently than every 15 hours.
Noted that htovgyre and htovovrt should exlcude 'bolus velocity' contributions from the Gent-McWilliams parameterization; further noted that htovdiff and hfogo should include any 'bolus velocity' contribution.
Specified that in calculating wfo, zos, and zobt, only the ocean portion of each grid cell should be considered.
Changed 'atmospheric_boundary_layer_thickness' to 'atmosphere_boundary_layer_thickness'.
We now request that in identifying forcing agents (table A5) the term that is "most specific", not "most general" should be used (e.g., if the only anthropogenic effect included in the model simulation is an increase in carbon dioxide, use "co2", not "a" or "g").
Corrected the cell_methods attribute associated with the time-dimension for daily maximum and minimum surface air temperature.
30 September 2004:
Corrected length of first ensemble member requested for the 550 ppm stabilization experiment (SRES B1): changed last year from 2200 to 2300.
Added 20 year interval to the daily data requested for each of the 1%/yr CO2 experiments: 20 years centered on time of doubling for doubling experiment. and 20 years centered on time of quadrupling for the quadrupling experiment.
Included a table of contents with links to sections of the document.
15 September 2004:
Noted that 3-hourly precipitation data should be averaged over the intervals 0-3Z, 3-6Z, ... 21-24Z, whereas the "snapshots" should be sampled at 0, 3, 6, ... 21Z.
Noted that stfmmc should exclude 'bolus velocity' contribution from the Gent-McWilliams parameterization.
3 September 2004:
Revised web links to be consistent with new PCMDI web site.
25 August 2004:
Clarified in the last table that yearly data (i.e., extreme indices) should be submitted for the same years as the monthly data.
2 August 2004:
Changed period for which 3-hourly data should be reported in the "pre-industrial control experiment" from "last year" to "last year of reported daily data (i.e., corresponding to year 2000 of the 20C3M expt.)".
Modified description of a few fields to make them clearer.
20 July 2004:
Changed years requested for the committed climate change experiment from tables A2a,b to be consistent with other experiments (i.e., 2046-2065, not 2031-2050).
19 July 2004:
Changed one of the experiment names in the last table of the document: 'climate of the 20th Century (20C3M)' was changed to 'climate of the 20th Century experiment (20C3M)'.
14 July 2004:
Added table of experiments and years of requested data.
Moved dimension table to near the end of the document.
Noted that "flux-correction" fields need to be reported only for a single year, assuming it applies to all experiments.
Noted that disk space constraints will likely limit quick access to monthly-mean 3-d ocean output to a single member of each ensemble.
Noted that daily data should only be reported for a single member of each ensemble, except for the surface air temperature (mean, max. and min.) and precipitation, which should be reported for all members.
5 July 2004: