On our rapidly shrinking capacity to comply with the planetary boundaries on climate change.
The planetary boundary framework constitutes an opportunity for decision makers to define climate policy through the lens of adaptive governance. Here, we use the DICE model to analyze the set of adaptive climate policies that comply with the two planetary boundaries related to climate change: (1) staying below a CO2concentration of 550 ppm until 2100 and (2) returning to 350 ppm in 2100. Our results enable decision makers to assess the following milestones: (1) a minimum of 33% reduction of CO2emissions by 2055 in order to stay below 550 ppm by 2100 (this milestone goes up to 46% in the case of delayed policies); and (2) carbon neutrality and the effective implementation of innovative geoengineering technologies (10% negative emissions) before 2060 in order to return to 350 ppm in 2100, under the assumption of getting out of the baseline scenario without delay. Finally, we emphasize the need to use adaptive path-based approach instead of single point target for climate policy design.
IRSTEA, UR LISC, 9 avenue des landais, 63170 Aubière, France.|School of Sustainability, Arizona State University, Tempe, United States.
Jean-Denis
JD
Mathias
School of Sustainability, Arizona State University, Tempe, United States.|School of Human Evolution and Social Change, Arizona State University, Tempe, United States.|Center for Behavior, Institutions and the Environment, Arizona State University, Tempe, United States.
John M
JM
Anderies
School of Sustainability, Arizona State University, Tempe, United States.|Center for Behavior, Institutions and the Environment, Arizona State University, Tempe, United States.
Marco A
MA
Janssen
D002245:Carbon Dioxide / Q000032:analysis* / Q000737:chemistry; D057231:Climate Change / Q000706:statistics & numerical data*; D018534:Earth, Planet; D017752:Greenhouse Effect; D006801:Humans; D007391:International Cooperation; D015233:Models, Statistical; D001335:Vehicle Emissions / Q000032:analysis / Q000517:prevention & control*
D001335:Vehicle Emissions; D002245:Carbon Dioxide