Journal cover Journal topic
Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
Geosci. Model Dev., 9, 2973-2998, 2016
https://doi.org/10.5194/gmd-9-2973-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Model experiment description paper
02 Sep 2016
The Land Use Model Intercomparison Project (LUMIP) contribution to CMIP6: rationale and experimental design
David M. Lawrence1, George C. Hurtt2, Almut Arneth3, Victor Brovkin4, Kate V. Calvin5, Andrew D. Jones6, Chris D. Jones7, Peter J. Lawrence1, Nathalie de Noblet-Ducoudré8, Julia Pongratz4, Sonia I. Seneviratne9, and Elena Shevliakova10 1National Center for Atmospheric Research, Boulder, CO, USA
2University of Maryland, College Park, MD, USA
3Karlsruhe Institute of Technology, Garmisch-Partenkirchen, Germany
4Max Planck Institute for Meteorology, Hamburg, Germany
5Joint Global Change Research Institute, College Park, MD, USA
6Lawrence Berkeley National Laboratory, Berkeley, CA, USA
7Met Office Hadley Centre, Exeter, UK
8Laboratoire des Sciences du Climat et de l'Environnement, Gif-sur-Yvette, France
9Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland
10NOAA/GFDL and Princeton University, Princeton, NJ, USA
Abstract. Human land-use activities have resulted in large changes to the Earth's surface, with resulting implications for climate. In the future, land-use activities are likely to expand and intensify further to meet growing demands for food, fiber, and energy. The Land Use Model Intercomparison Project (LUMIP) aims to further advance understanding of the impacts of land-use and land-cover change (LULCC) on climate, specifically addressing the following questions. (1) What are the effects of LULCC on climate and biogeochemical cycling (past–future)? (2) What are the impacts of land management on surface fluxes of carbon, water, and energy, and are there regional land-management strategies with the promise to help mitigate climate change? In addressing these questions, LUMIP will also address a range of more detailed science questions to get at process-level attribution, uncertainty, data requirements, and other related issues in more depth and sophistication than possible in a multi-model context to date. There will be particular focus on the separation and quantification of the effects on climate from LULCC relative to all forcings, separation of biogeochemical from biogeophysical effects of land use, the unique impacts of land-cover change vs. land-management change, modulation of land-use impact on climate by land–atmosphere coupling strength, and the extent to which impacts of enhanced CO2 concentrations on plant photosynthesis are modulated by past and future land use.

LUMIP involves three major sets of science activities: (1) development of an updated and expanded historical and future land-use data set, (2) an experimental protocol for specific LUMIP experiments for CMIP6, and (3) definition of metrics and diagnostic protocols that quantify model performance, and related sensitivities, with respect to LULCC. In this paper, we describe LUMIP activity (2), i.e., the LUMIP simulations that will formally be part of CMIP6. These experiments are explicitly designed to be complementary to simulations requested in the CMIP6 DECK and historical simulations and other CMIP6 MIPs including ScenarioMIP, C4MIP, LS3MIP, and DAMIP. LUMIP includes a two-phase experimental design. Phase one features idealized coupled and land-only model simulations designed to advance process-level understanding of LULCC impacts on climate, as well as to quantify model sensitivity to potential land-cover and land-use change. Phase two experiments focus on quantification of the historic impact of land use and the potential for future land management decisions to aid in mitigation of climate change. This paper documents these simulations in detail, explains their rationale, outlines plans for analysis, and describes a new subgrid land-use tile data request for selected variables (reporting model output data separately for primary and secondary land, crops, pasture, and urban land-use types). It is essential that modeling groups participating in LUMIP adhere to the experimental design as closely as possible and clearly report how the model experiments were executed.


Citation: Lawrence, D. M., Hurtt, G. C., Arneth, A., Brovkin, V., Calvin, K. V., Jones, A. D., Jones, C. D., Lawrence, P. J., de Noblet-Ducoudré, N., Pongratz, J., Seneviratne, S. I., and Shevliakova, E.: The Land Use Model Intercomparison Project (LUMIP) contribution to CMIP6: rationale and experimental design, Geosci. Model Dev., 9, 2973-2998, https://doi.org/10.5194/gmd-9-2973-2016, 2016.
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Short summary
Human land-use activities have resulted in large changes to the Earth's surface, with resulting implications for climate. In the future, land-use activities are likely to expand and intensify further to meet growing demands for food, fiber, and energy. The goal of LUMIP is to take the next steps in land-use change science, and enable, coordinate, and ultimately address the most important land-use science questions in more depth and sophistication than possible in a multi-model context to date.
Human land-use activities have resulted in large changes to the Earth's surface, with resulting...
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