Defining Dangerous Anthropogenic Interference: The Role of Science, the Limits of Science
- 15 November 2005
- journal article
- Published by Wiley in Risk Analysis
- Vol. 25 (6), 1399-1407
- https://doi.org/10.1111/j.1539-6924.2005.00687.x
Abstract
Defining “dangerous anthropogenic interference with the climate system” in the context of Article 2 of the UN Framework Convention on Climate Change (UNFCCC) presents a complex challenge for those developing long‐term climate policy. Natural science has a key role to play in quantifying vulnerabilities of elements of the Earth system and estimating the risks from a changing climate. But attempts to interpret Article 2 will inevitably draw on understanding from social science, psychology, law, and ethics. Here I consider the limits of science in defining climate “danger” by focusing on the potential disintegration of the major ice sheets as an example of an extreme impact. I show that considerations of timescale, uncertainty, and learning preclude a definition of danger drawn purely from natural science. Decisionmakers will be particularly challenged by one characteristic of global problems: answers to some scientific questions become less accurate over decadal timescales, meandering toward the wrong answer, a feature I call negative learning. I argue for a precautionary approach to Article 2 that would be based initially on current, limited scientific understanding of the future of the ice sheets.Keywords
This publication has 33 references indexed in Scilit:
- Informing climate policy given incommensurable benefits estimatesGlobal Environmental Change, 2004
- To Hedge or Not Against an Uncertain Climate Future?Science, 2004
- Accelerated ice discharge from the Antarctic Peninsula following the collapse of Larsen B ice shelfGeophysical Research Letters, 2004
- Glacier acceleration and thinning after ice shelf collapse in the Larsen B embayment, AntarcticaGeophysical Research Letters, 2004
- Implications of increased Greenland surface melt under global-warming scenarios: ice-sheet simulationsQuaternary Science Reviews, 2004
- Global impacts of climate change under the SRES scenariosGlobal Environmental Change, 2004
- Probabilistic Integrated Assessment of "Dangerous" Climate ChangeScience, 2004
- Climate change: long-term targets and short-term commitmentsGlobal Environmental Change, 2003
- Millions at risk: defining critical climate change threats and targetsGlobal Environmental Change, 2001
- Pleistocene Collapse of the West Antarctic Ice SheetScience, 1998