This book is open access under a CC BY 4.0 license. This volume presents an empirical model of global climate developed by the authors and uses that model to show that global warming will likely remain 2ºC below pre-industrial throughout this century provided: a) both the unconditional and conditional paris INDC commitments are followed; b) the emission reductions needed to achieve the paris INDCs are carried forward to 2060 and beyond.The first section of the book provides a short overview of earth’s climate system, describing and contrasting climatic changes throughout the planet’s history and anthropogenic changes post-industrial revolution. The second section describes the climate model developed by the authors (canty et al., atmospheric chemistry and physics, 2013) and contrasts the model to climate models used in the intergovernmental panel on climate change (IPCC) 2013 report. Chapter 3 examines both the unconditional (i.E.
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