Greenhouse Gas Policy Influences Climate via Direct Effects of Land-Use Change

AbstractProposed climate mitigation measures do not account for direct biophysical climate impacts of land-use change (LUC), nor do the stabilization targets modeled for phase 5 of the Coupled Model Intercomparison Project (CMIP5) representative concentration pathways (RCPs). To examine the significance of such effects on global and regional patterns of climate change, a baseline and an alternative scenario of future anthropogenic activity are simulated within the Integrated Earth System Model, which couples the Global Change Assessment Model, Global Land-Use Model, and Community Earth System Model. The alternative scenario has high biofuel utilization and approximately 50% less global forest cover than the baseline, standard RCP4.5 scenario. Both scenarios stabilize radiative forcing from atmospheric constituents at 4.5 W m−2 by 2100. Thus, differences between their climate predictions quantify the biophysical effects of LUC. Offline radiative transfer and land model simulations are also utilized to iden...

[1]  R. Betts.  Offset of the potential carbon sink from boreal forestation by decreases in surface albedo , 2000, Nature.

[2]  D. Nepstad,et al.  Interactions among Amazon land use, forests and climate: prospects for a near-term forest tipping point , 2008, Philosophical Transactions of the Royal Society B: Biological Sciences.

[3]  Gregg Marland,et al.  The climatic impacts of land surface change and carbon management, and the implications for climate-change mitigation policy , 2003 .

[4]  Alexei G. Sankovski,et al.  Geographical Distributions of Temperature Change for Scenarios of Greenhouse Gas and Sulfur Dioxide Emissions , 2000 .

[5]  G. Bonan,et al.  Effects of boreal forest vegetation on global climate , 1992, Nature.

[6]  Peter E. Thornton,et al.  Simulating the Biogeochemical and Biogeophysical Impacts of Transient Land Cover Change and Wood Harvest in the Community Climate System Model (CCSM4) from 1850 to 2100 , 2012 .

[7]  Elena Shevliakova,et al.  Modeled Impact of Anthropogenic Land Cover Change on Climate , 2007 .

[8]  Veronika Eyring,et al.  A Summary of the CMIP5 Experiment Design , 2010 .

[9]  R. Neale,et al.  The Mean Climate of the Community Atmosphere Model (CAM4) in Forced SST and Fully Coupled Experiments , 2013 .

[10]  G. Danabasoglu,et al.  The Community Climate System Model Version 4 , 2011 .

[11]  W. Collins,et al.  PORT, a CESM tool for the diagnosis of radiative forcing , 2012 .

[12]  G. Danabasoglu,et al.  Climate Sensitivity of the Community Climate System Model, Version 4 , 2012 .

[13]  G. Bonan.  Forests and Climate Change: Forcings, Feedbacks, and the Climate Benefits of Forests , 2008, Science.

[14]  J. Edmonds,et al.  RCP4.5: a pathway for stabilization of radiative forcing by 2100 , 2011 .

[15]  G. Meehl,et al.  The Importance of Land-Cover Change in Simulating Future Climates , 2005, Science.

[16]  J. Edmonds,et al.  Implications of Limiting CO2 Concentrations for Land Use and Energy , 2009, Science.

[17]  Robert Sausen,et al.  Identification of anthropogenic climate change using a second-generation reanalysis , 2004 .

[18]  R. Avissar,et al.  Effects of Tropical Deforestation on Global Hydroclimate: A Multimodel Ensemble Analysis , 2009 .

[19]  John F. B. Mitchell,et al.  The next generation of scenarios for climate change research and assessment , 2010, Nature.

[20]  E. Stehfest,et al.  Harmonization of land-use scenarios for the period 1500–2100: 600 years of global gridded annual land-use transitions, wood harvest, and resulting secondary lands , 2011 .

[21]  P. Valdes,et al.  The effect of Amazonian deforestation on the northern hemisphere circulation and climate , 2000 .

[22]  G. P. Kyle,et al.  Global and regional evolution of short-lived radiatively-active gases and aerosols in the Representative Concentration Pathways , 2011 .

[23]  Ann Henderson-Sellers,et al.  Global climate sensitivity to tropical deforestation , 1995 .

[24]  R. Betts,et al.  The influence of land-use change and landscape dynamics on the climate system: relevance to climate-change policy beyond the radiative effect of greenhouse gases , 2002, Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences.

[25]  Anthony C. Janetos,et al.  Climate mitigation and the future of tropical landscapes , 2010, Proceedings of the National Academy of Sciences.

[26]  S. Malyshev,et al.  The underpinnings of land‐use history: three centuries of global gridded land‐use transitions, wood‐harvest activity, and resulting secondary lands , 2006 .

[27]  K. Caldeira,et al.  Combined climate and carbon-cycle effects of large-scale deforestation , 2006, Proceedings of the National Academy of Sciences.

[28]  S. Carpenter,et al.  Global Consequences of Land Use , 2005, Science.

[29]  A. Thomson,et al.  The representative concentration pathways: an overview , 2011 .

[30]  T. Wigley,et al.  Emulating coupled atmosphere-ocean and carbon cycle models with a simpler model, MAGICC6 - Part 1: Model description and calibration , 2011 .

[31]  G. Bonan,et al.  Changes in Arctic vegetation amplify high-latitude warming through the greenhouse effect , 2009, Proceedings of the National Academy of Sciences.

[32]  Peter E. Thornton,et al.  Influence of carbon‐nitrogen cycle coupling on land model response to CO2 fertilization and climate variability , 2007 .

[33]  T. D. Mitchell,et al.  Pattern Scaling: An Examination of the Accuracy of the Technique for Describing Future Climates , 2003 .

[34]  A dampened land use change climate response towards the tropics , 2011 .

[35]  Randall A. Childs.  Economic Impact of the American Clean Energy and Security Act of 2009 (H.R. 2454) on the West Virginia Economy , 2009 .

[36]  Kees Klein Goldewijk,et al.  Biogeophysical effects of land use on climate : Model simulations of radiative forcing and large-scale temperature change , 2007 .

[37]  R. E. Livezey,et al.  Statistical Field Significance and its Determination by Monte Carlo Techniques , 1983 .

[38]  D. Lawrence,et al.  The CCSM4 Land Simulation, 1850-2005: Assessment of Surface Climate and New Capabilities , 2012 .

[39]  Alvaro Montenegro,et al.  Small temperature benefits provided by realistic afforestation efforts , 2011 .

[40]  Julia C. Hargreaves,et al.  Regulation of atmospheric CO2 by deep‐sea sediments in an Earth system model , 2007 .

[41]  C. Müller,et al.  Uncertainties in climate responses to past land cover change: First results from the LUCID intercomparison study , 2009 .