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Other forcing data in parallel preparation?

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Other forcing data in parallel preparation?

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Top 10 dataset improvements/fixes required for the AR7 Fast Track commencement?

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Top 10 dataset improvements/fixes required for the AR7 Fast Track commencement?

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What are key uncertainties/questions for each product?

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What are key uncertainties/questions for each product?

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Documentation needs for informed implementation of forcings in models

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Documentation needs for informed implementation of forcings in models

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Will the stratospheric aerosol radiative properties data upon request be provided at the wavelengths corresponding to SW and LW bands of the models' radiation schemes?

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Will the stratospheric aerosol radiative properties data upon request be provided at the wavelengths corresponding to SW and LW bands of the models' radiation schemes?

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Great to see updated Land-use data on ESGF. Will there be documentation similar to LUH2 for LUH3? 

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Great to see updated Land-use data on ESGF. Will there be documentation similar to LUH2 for LUH3? 

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Land-Use Harmonization (LUH2)

As part of the World Climate Research Program Coupled Model Intercomparison Project ( CMIP6), the international community is developing the next generation of advanced Earth System Models (ESM) able to estimate the combined effects of human activities (e.g. land use and fossil fuel emissions) on the carbon-climate system. In addition, a set of historical data based on HYDE, and multiple alternative scenarios of the future (2015-2100) developed by Integrated Assessment Model (IAM) teams, are being developed as input for these models. The goal of the Land-Use Harmonization (LUH2) project is to prepare a harmonized set of land-use scenarios that smoothly connects the historical reconstructions of land-use with the future projections in the format required for ESMs. The land-use harmonization strategy estimates the fractional land-use patterns, underlying land-use transitions, and key agricultural management information, annually for the time period 850-2100 at 0.25 x 0.25 resolution, while minimizing the differences at the transition between the historical reconstruction ending conditions and IAM initial conditions, and working to preserve changes depicted by the IAMs in the future.

The LUH2 model and datasets prepared for CMIP6 are described in Hurtt et al. 2020.

The SSP land-use scenarios used here and harmonized to the historic land use data are described in Popp et al. 2017.

To download our datasets or source code please visit the Data, and Code pages. For more information, related publications, and contact information, please see the Frequently Asked Questions page and Links pages.

Previously, in preparation for the Fifth Assessment Report (AR5) of the Intergovernmental Panel on Climate Change (IPCC), the Land-use Harmonization (LUH1) project also provided harmonized land-use data as part of CMIP5 for the years 1500-2100, at 0.5° x 0.5° resolution, which is now permanently archived at the ORNL DAAC.

Project Contacts:

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As part of the World Climate Research Program Coupled Model Intercomparison Project ( CMIP6), the international community is developing the next generation of advanced Earth System Models (ESM) able to estimate the combined effects of human activities (e.g. land use and fossil fuel emissions) on the carbon-climate system.

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Some links related to differences between the CEDS data going onto ESGF shortly (e.g. CMIP6+) and the CMIP6 data.

Regional/sectoral differences:

https://github.com/JGCRI/CEDS/blob/master/documentation/Version_comparison_figures_v_2024_04_01_vs_2016_07_16(CMIP6).pdf

Major differences readme related to the above:

https://github.com/JGCRI/CEDS/wiki/Release-Notes

The major updates to spatial gridding:

-- Large point sources, particularly SO2, more accurately located within countries

-- New seasonality, including COVID 2020 changes and recovery in 2021+

-- Updates to newer spatial proxies in general

Note that there will be further updates when we publish the final CMIP7 historical dataset at the end of this calendar year. For example, there have been signifiant updates to residential biomass consumption in the IEA energy statistics released 1-2 months ago.

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Community Emissions Data System (CEDS). Contribute to JGCRI/CEDS development by creating an account on GitHub.