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Sensitivity of Climate to Diapycnal Diffusivity: Part I. Equilibrium State; Part II. Global Warming Scenario
(MIT Joint Program on the Science and Policy of Global Change, 2004-05)
Part I: The diapycnal diffusivity in the ocean is one of the least known parameters in current climate models. Measurements of this diffusivity are sparse and insufficient for compiling a global map. Inferences from inverse ...
MIT Integrated Global System Model (IGSM) Version 2: Model Description and Baseline Evaluation
(MIT Joint Program on the Science and Policy of Global Change, 2005-07)
The MIT Integrated Global System Model (IGSM) is designed for analyzing the global environmental changes that may result from anthropogenic causes, quantifying the uncertainties associated with the projected changes, and ...
Constraining Climate Model Parameters from Observed 20th Century Changes
(MIT Joint Program on the Science and Policy of Global Change, 2008-04)
We present revised probability density functions for climate model parameters (effective climate sensitivity, the rate of deep-ocean heat uptake, and the strength of the net aerosol forcing) that are based on climate change ...
The Influence on Climate Change of Differing Scenarios for Future Development Analyzed Using the MIT Integrated Global System Model
(MIT Joint Program on the Science and Policy of Global Change, 2008-09)
A wide variety of scenarios for future development have played significant roles in climate policy discussions. This paper presents projections of greenhouse gas (GHG) concentrations, sea level rise due to thermal expansion ...
Sensitivity of Climate Change Projections to Uncertainties in the Estimates of Observed Changes in Deep-Ocean Heat Content
(MIT Joint Program on the Science and Policy of Global Change, 2008-11)
The MIT 2D climate model is used to make probabilistic projections for changes in global mean surface temperature and for thermosteric sea level rise under a variety of forcing scenarios. The uncertainties in climate ...
Unintended Environmental Consequences of a Global Biofuels Program
(MIT Joint Program on the Science and Policy of Global Change, 2009-01)
Biofuels are being promoted as an important part of the global energy mix to meet the climate change challenge. The environmental costs of biofuels produced with current technologies at small scales have been studied, but ...
An Integrated Assessment Framework for Uncertainty Studies in Global and Regional Climate Change: The IGSM-CAM
(MIT Joint Program on the Science and Policy of Global Change, 2012-06-18)
This paper describes an integrated assessment framework for uncertainty studies in global and regional climate change. In this framework, the Massachusetts Institute of Technology (MIT) Integrated Global System Model (IGSM), ...
Estimated PDFs of Climate System Properties Including Natural and Anthropogenic Forcings
(MIT Joint Program on the Science and Policy of Global Change, 2005-09)
We present revised probability density functions (PDF) for climate system properties (climate sensitivity, rate of deep-ocean heat uptake, and the net aerosol forcing strength) that include the effect on 20th century ...
A Three-Dimensional Ocean-Seaice-Carbon Cycle Model and its Coupling to a Two-Dimensional Atmospheric Model: Uses in Climate Change Studies
(MIT Joint Program on the Science and Policy of Global Change, 2005-05)
We describe the coupling of a three-dimensional ocean circulation model, with explicit thermodynamic seaice and ocean carbon cycle representations, to a two-dimensional atmospheric/land model. This coupled system has been ...
Estimating Probability Distributions from Complex Models with Bifurcations: The Case of Ocean Circulation Collapse
(MIT Joint Program on the Science and Policy of Global Change, 2006-03)
Studying the uncertainty in computationally expensive models has required the development of specialized methods, including alternative sampling techniques and response surface approaches. However, existing techniques for ...