Climate change glossary
How does adaptation differ from mitigation? And what is REDD? The jargon of climate change can be hard to grasp. Use this glossary to decode it.
A
Adaptation Action that helps cope with the effects of climate change - for example construction of barriers to protect against rising sea levels, or conversion to crops capable of surviving high temperatures and drought.Adaptation fund A fund for projects and programmes that help developing countries cope with the adverse effects of climate change. It is financed by a share of proceeds from emission-reduction programmes such as the Clean Development Mechanism.
Annex I countries The industrialised countries (and countries in transition to a market economy) which took on obligations to reduce their greenhouse gas emissions under the Kyoto Protocol. Their combined emissions, averaged out during the 2008-2012 period, should be 5.2% below 1990 levels.
Annex II Countries which have a special obligation under the Kyoto Protocol to provide financial resources and transfer technology to developing countries. This group is a sub-section of the Annex I countries, excluding those that, in 1992, were in transition from centrally planned to a free market economy.
Anthropogenic climate change Man-made climate change - climate change caused by human activity as opposed to natural processes.
Aosis The Alliance of Small Island States comprises 42 island and coastal states mostly in the Pacific and Caribbean. Members of Aosis are some of the countries likely to be hit hardest by global warming. The very existence of low-lying islands, such as the Maldives and some of the Bahamas, is threatened by rising waters.
AR4 The Fourth Assessment Report produced by the Intergovernmental Panel on Climate Change (IPCC) published in 2007. The report assessed and summarised the climate change situation worldwide. It concluded that it was at least 90% likely that the increase of the global average temperature since the mid-20th Century was mainly due to man's activity.
Atmospheric aerosols Microscopic particles suspended in the lower atmosphere that reflect sunlight back to space. These generally have a cooling affect on the planet and can mask global warming. They play a key role in the formation of clouds, fog, precipitation and ozone depletion in the atmosphere.
B
Bali action plan A plan drawn up at the UN Climate Change Conference in Bali, in December 2007, forming part of the Bali roadmap. The action plan established a working group to define a long-term global goal for reduction of greenhouse gas emissions, and a "shared vision for long-term co-operative action" in the areas of mitigation, adaptation, finance and technology.Bali roadmap A plan drawn up at the UN Climate Change Conference in Bali, in December 2007, to pave the way for an agreement at Copenhagen in 2009 on further efforts to reduce greenhouse gas emissions after the expiry of the Kyoto Protocol. The roadmap gave deadlines to two working groups, one working on the Bali action plan, and another discussing proposed emission reductions by Annex I countries after 2012.
Baseline for cuts The year against which countries measure their target decrease of emissions. The Kyoto Protocol uses a baseline year of 1990. Some countries prefer to use later baselines. Climate change legislation in the United States, for example, uses a 2005 baseline.
Biofuel A fuel derived from renewable, biological sources, including crops such as maize and sugar cane, and some forms of waste.
Black carbon The soot that results from the incomplete combustion of fossil fuels, biofuels, and biomass (wood, animal dung, etc.). It is the most potent climate-warming aerosol. Unlike greenhouse gases, which trap infrared radiation that is already in the Earth's atmosphere, these particles absorb all wavelengths of sunlight and then re-emit this energy as infrared radiation.
Boxer-Kerry bill The Clean Energy Jobs and American Power Act, now in the US Senate, also known as Waxman-Markey from 2007-2009 as it passed through the House of Representatives. This bill aims to reduce emissions by about 20% from a 2005 baseline by 2020. The bill would create a US-wide carbon market, which in time would link up with other carbon markets, like the EU Emission Trading Scheme. The bill is not expected to get Senate approval until 2010.
Business as usual A scenario used for projections of future emissions assuming no action, or no new action, is taken to mitigate the problem. Some countries are pledging not to reduce their emissions but to make reductions compared to a business as usual scenario. Their emissions, therefore, would increase but less than they would have done.
