The harmonised 2000-2005 data is based on, where available, RCP year 2000 inventory data, inverse emission estimates (mainly for HFCs, PFCs, SF6), or literature sources (e.g. (For background information and all the original RCP emissions, please visit the RCP emission scenario database. Due to this harmonisation process, all harmonised RCPs now share the same 2000 to 2005 emission data. The post-2005 were adjusted gas-by-gas using linearly decreasing scaling factors or offsets. In addition, two supplementary extensions are shown, connecting RCP6.0 levels to RCP4.5 levels by 2250 (SCP6TO45) or RCP45 levels to RCP3PD concentrations and forcings (SCP45to3PD). For more information, please see the central CMIP5 PCMDI website and the RCP emission scenario database and our documentation: M. Global Anthropogenic Radiative Forcing for the high RCP8.5, the medium-high RCP6, the medium-low RCP4.5 and the low RCP3-PD.
Please note again, that only the GHG concentrations shown below are CMIP5 recommendations, with forcing agents like tropospheric ozone, stratospheric ozone, aerosol abundances, and land-use pattern information to be taken from elsewhere, as detailed on the central CMIP5 PCMDI website and the RCP emission scenario database pages. Numerical values of all other data files stayed the same, although the description was updated (e.g. radiative forcing, is not part of the CMIP5 recommendations and is provided for transparency in how we derived the greenhouse gas concentrations for the RCPs. Without those contributions, this working step in preparation for the IPCC AR5 (of turning the IAM output into Earth System Model concentration input) would not have been possible. Here, data is provided for the full time span from 1765 to 2005, although modelling groups might decide to start their model runs only in 1850. * For the "year 2000" climatology please refer to the following publication: Van der Werf, G., J. Note that this site not only contains the CMIP5 recommended datasets (accessible as well via the RCP database, see above), but that some of data posted here, i.e. CMIP5 contributors are advised to check out as well the PCMDI CMIP5 site for a complete overview of how the CMIP5 experiments are to be conducted. Last but not least, a big thanks goes out to all those in the scientific community, that contributed invaluable assistance, datasets, model code and review comments. The greenhouse gas mixing ratios, in particular CO2, N2O, HFCs, PFCs, SF6 and the ozone depleting substances ODS, are recommended for being used in the 20th century runs in preparation of IPCC AR5. Technological Forecasting and Social Change 74, 7, 887-935. "The RCP Greenhouse Gas Concentrations and their Extension from 1765 to 2300." Climatic Change (Special Issue), DOI: 10.1007/s10584-011-0156-z, freely available online (PDF) (HTML) 1. (3) 'MAGICC' are ASCII files, which provide regional emission data information formatted to be used with MAGICC 6.3 or higher - as used for computing the Mixing Ratios recommendation and consolidated forcing information. It has been pointed out, that the volcanic radiative forcing source information is incomplete in the provided files. Now ammended for clarity.) *CMIP5 Recommendation: Only the mixing ratios for long-lived GHG emissions are CMIP5 recommendation. Note that compounds with a short atmospheric residence time including tropospheric ozone are provided by J. (2) 'XLS' files are MS Excel files, which can be opened with MS Excel, Open Office, Numbers or other spreadsheet programs.
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Summary The Task Group 'RCP Concentrations Calculation and Data' harmonised and consolidated greenhouse gas concentration and emission datasets for the pre-industrial control runs, 20th century, and the Representative Concentration Pathways (RCPs). Here, both the climate and carbon cycle components are calibrated to provide a medium-range estimate of models available in IPCC Fourth Assessment Report. Thus, these positive post-2150 CFC emissions are simply an implication of the constant concentration experiment and not a emission projections in any way. For example, stabilisting CFC concentrations in 2150 will require to assume positive emissions - after those emissions had already been zero by that time. * Wise, MA, KV Calvin, AM Thomson, LE Clarke, B Bond-Lamberty, RD Sands, SJ Smith, AC Janetos, JA Edmonds. Implications of Limiting CO2 Concentrations for Land Use and Energy. Thus, we provide two supplementary extensions, which are not part of the CMIP5 recommendations: Individual modelling groups might be interested running these experiments. For example, most of the emission projections for ozone depleting substances are generously provided by the WMO assessment report researchers Guus Velders, John Daniel et al. Only slight modifications have been done from the WMO 2006 A1 baseline scenario. Scenarios of Greenhouse Gas Emissions and Atmospheric Concentrations.
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In particular, stakeholders were interested in an extension which combines concentrations again in the long-term, after initially following different pathways. The RCP emission scenarios were ammended by a series of emissions that were not provided by the Integrated Assessment Models.
For transparency purposes, this website here documents all consolidated GHG concentration, harmonized emission datasets and forcing timeseris that have been used within the RCP 'concentration calculation and data' group. "The RCP greenhouse gas concentrations and their extension from 1765 to 2500" (2011), Climate Change, Special RCP Issue.(PDF) (HTML) Notes: *Updates, 30th May 2010: Additional files provided are for the medium-high RCP6, and two supplementary extensions that combine RCP6 & SCP6-TP-4.5, and RCP4.5 & SCP4.5-TP-3PD, respectively. (2006), Interannual variability in global biomass burning emissions from 1997 to 2004, Atmos.
the GHG concentration timeseries (which are as well mirrored the central RCP emission scenario database ). * For the 1960-2000 RETRO inventory use: Schultz, M.
Data download On this website, only a part of the recommended RCP CMIP5 datasets are available, i.e.
No uncertainty ranges are shown and reported, as for creating the recommendation datasets for CMIP5, central estimates have been assumed closely in line with central estimates in IPCC AR4.