Simulations of HAPPI (Half a degree Additional warming, Prognosis and Projected Impacts) Tier-1 experiments based on the CAM4-2degree atmospheric model and on the CLM4-2degree land model of the National Center for Atmospheric Research - Department of Energy (NCAR-DOE)
Project: HAPPI-MIP international initiative - The international HAPPI-MIP (Half a degree Additional warming, Prognosis and Projected Impacts - Model Intercomparison Project) initiative [1] has been launched in response to the announced intent of the IPCC (Intergovernmental Panel on Climate Change) to publish the special report SR1.5 on the impacts of global warming of 1.5°C above pre-industrial levels and related global greenhouse gas emission pathways, in the context of strengthening the global response to the threat of climate change, sustainable development, and efforts to eradicate poverty. In addition, HAPPI-Land (HAPPI - Land-use scenario experiment) was initiated to investigate the biogeophysical effects of land-based mitigation in different low emission scenarios. The HAPPI-MIP and HAPPI-Land data belong to the data protocol of HAPPI-MIP [2]. The file format is NetCDF containing time series of a single variable per file. The meta data model is very similar to that of CMIP5. The HAPPI-MIP initiative and the model simulations it proposes are described in detail in Mitchell et al., 2017 [3]. Details and results on the HAPPI-Land initiative are described and discussed in Hirsch et al., 2018 [4] Each CERA experiment of this project contains the data based on a single model. References: [1] http://www.happimip.org/ [2] http://www.happimip.org/wp-content/uploads/2016/05/HAPPI_request_diagnostics_final.pdf [3] https://doi.org/10.5194/gmd-10-571-2017 [4] https://doi.org/10.1002/2017EF000744 Summary: Global HAPPI-MIP protocol data based on the CAM4[1]/CLM4 [2] (CAM4-2degree) AGCM developed by the National Center for Atmospheric Research – Department of Energy (NCAR-DOE). CAM4/CLM4 is part of the CESM 1.0.4 model release [3]. This CERA experiment includes data of 521 AMIP simulations within the period 1979-2016, 501 AMIP-like simulations of 2106-2116 representing a climate warmer by 1.5°C than under pre-industrial conditions (1861-1880) and 501 AMIP-like simulations of 2106-2116 representing a climate warmer by 2.0°C than under pre-industrial conditions (1861-1880). Reference: [1] Neale, R. B., Richter, J. H., Conley, A. J., Park, S., Lauritzen, P. H., Gettelman, A., Williamson, D. L., Rasch, P. J., Vavrus, S. J., Taylor, M. A., Collins, W. D., Zhang, M., and Lin, S.-J.: Description of the NCAR Community Atmosphere Model (CAM4). NCAR Tech. Note NCAR/TN-485+STR, National Center for Atmospheric Research, Boulder, CO, 120 pp., 2011. [2] Oleson, K. W., Lawrence, D. M., Bonan, G. B., Flanner, M. G., Kluzek, E., Lawrence, P. J., Levis, S., Swenson, S. C., Thornton, P. E., Dai, A., Decker, M., Dickinson, R., Feddema, J., Heald, C. L., Hoffman, F., Lamarque, J.-F., Mahowald, N., Niu, G.-Y., Qian, T., Randerson, J., Running, S., Sakaguchi, K., Slater, A., Stockli, R., Wang, A., Yang, Z.-L., Zeng, Xi., and Zeng, Xu.: Technical Description of version 4.0 of the Community Land Model (CLM), NCAR Tech. Note NCAR/TN-478+STR, National Center for Atmospheric Research, Boulder, CO, 257 pp., 2010. [3] http://www.cesm.ucar.edu/models/cesm1.0/tags/index.html#CESM1_0_4
