Progress in Damage Function of Integrated Assessment Models for Climate Change

Authors: Changxin Liu*, Institutes of Science and Development, Chinese Academy of Sciences
Topics: Hazards and Vulnerability
Keywords: climate change; integrated assessment model; damage function; economic impact
Session Type: Paper
Day: 4/13/2018
Start / End Time: 1:20 PM / 3:00 PM
Room: Napoleon D1, Sheraton 3rd Floor
Presentation File: No File Uploaded

From the perspective of model coupling, this study introduced the research progress of the current damage function of integrated assessment model (IAM). It mainly analyzed the coupling function and existing scientific problems of the damage function from the point of view of the construction method of the damage function, the coupling of the damage function with the climate model and the economic model and the coupling IAM with Climate model, then discuss its improvement direction. On the construction method of the damage function, it mainly adopts the expert judgement, meta-analysis and statistical methods. However, they each have advantages and disadvantages. While coupling with the climate model, most of damage functions only contain the temperature rise as the climate change factor, which can’t express the precipitation and other climate change information. And it is calibrated by the annual average of the global scale, which can’t reflect the regional differences and the changes during the year and can’t directly describe the huge damage caused by extreme climate events. On the coupling with the economic model, the damage function based on the production sectors are lacking in the assessment function of indirect damages and the dynamic influence mechanism of economic growth. In view of above shortcomings of feedback mechanism of the climate change on the economic impacts in IAM, the damage function mainly needs to be reconstructed from two directions.Thus, it can closely link the climate module with economic module and comprehensively assess the economic damages of climate change.

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