Development and Application of Earth System Models
Author(s)Prinn, Ronald G.
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The global environment is a complex and dynamic system. Earth system modeling is needed to help understand changes in interacting subsystems, elucidate the influence of human activities, and explore possible future changes. Integrated assessment of environment and human development is arguably the most difficult and most important “systems” problem faced. To illustrate this approach, we present results from the integrated global system model (IGSM), which consists of coupled submodels addressing economic development, atmospheric chemistry, climate dynamics, and ecosystem processes. An uncertainty analysis implies that without mitigation policies, the global average surface temperature may rise between 3.5 °C and 7.4 °C from 1981–2000 to 2091–2100 (90% confidence limits). Polar temperatures, absent policy, are projected to rise from about 6.4 °C to 14 °C (90% confidence limits). Similar analysis of four increasingly stringent climate mitigation policy cases involving stabilization of greenhouse gases at various levels indicates that the greatest effect of these policies is to lower the probability of extreme changes. The IGSM is also used to elucidate potential unintended environmental consequences of renewable energy at large scales. There are significant reasons for attention to climate adaptation in addition to climate mitigation that earth system models can help inform. These models can also be applied to evaluate whether “climate engineering” is a viable option or a dangerous diversion. We must prepare young people to address this issue: The problem of preserving a habitable planet will engage present and future generations. Scientists must improve communication if research is to inform the public and policy makers better.
DepartmentMassachusetts Institute of Technology. Center for Global Change Science; Massachusetts Institute of Technology. Joint Program on the Science & Policy of Global Change
Proceedings of the National Academy of Sciences of the United States of America
National Academy of Sciences (U.S.)
Prinn, R. G. “Fostering Advances in Interdisciplinary Climate Science Sackler Colloquium: Development and Application of Earth System Models.” Proceedings of the National Academy of Sciences (2012): 1-8. © 2012 National Academy of Sciences.
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