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Powerpoint - Climate Finance and Markets
Powerpoint - Climate Finance and Markets

... Development Debt • Developing countries entitled to opportunities for development, providing basic services, and ...
PDF - BC3 Basque Centre for Climate Change
PDF - BC3 Basque Centre for Climate Change

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... The increase in CO2 concentration can be explained by the following factors: • Anthropogenic emissions from fossil fuels and industrial processes • Anthropogenic emissions/removals from land use change and forestry • Natural removals by the biosphere • Natural removals by the ocean ...
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... breaching of several tipping points in the earth system is likely. • This would raise temperatures above 4C since many act as feedbacks and are not included in climate models presently • Breaching range of several key tipping points may occur at 3C • 2016 scenarios effective at avoiding entering thi ...
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... change will be equivalent to losing at least 5% of global Gross Domestic Product (GDP) each year, now and forever.” This conclusion has been criticized by many economists, particularly in the United States, where Professor William Nordhaus of Yale, the leading American expert on climate economics, c ...
Tropical rainforest canopies and climate change
Tropical rainforest canopies and climate change

... 0.05°C per decade since the mid 1970s), and, surprisingly, a decline in precipitation (1% per decade ⫾0.8%) (Malhi & Wright 2004). However, this precipitation decline is in the Northern hemisphere tropics, and there has been little change in the Southern Hemisphere tropics (New et al. 2001). The dis ...
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Incorporating Extremes into Climate Envelope

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Climate and Tree-Ring Laboratory
Climate and Tree-Ring Laboratory

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Melting of Polar Icecaps – Impact on Fisheries

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Scientific opinion on climate change



The scientific opinion on climate change is the overall judgment amongst scientists about whether global warming is happening, and if so, its causes and probable consequences. This scientific opinion is expressed in synthesis reports, by scientific bodies of national or international standing, and by surveys of opinion among climate scientists. Individual scientists, universities, and laboratories contribute to the overall scientific opinion via their peer-reviewed publications, and the areas of collective agreement and relative certainty are summarised in these high level reports and surveys.The scientific consensus is that the Earth's climate system is unequivocally warming, and that it is extremely likely (at least 95% probability) that humans are causing most of it through activities that increase concentrations of greenhouse gases in the atmosphere, such as deforestation and burning fossil fuels. In addition, it is likely that some potential further greenhouse gas warming has been offset by increased aerosols.National and international science academies and scientific societies have assessed current scientific opinion on global warming. These assessments are generally consistent with the conclusions of the Intergovernmental Panel on Climate Change, the IPCC Fourth Assessment Report summarized:Warming of the climate system is unequivocal, as evidenced by increases in global average air and ocean temperatures, the widespread melting of snow and ice, and rising global average sea level.Most of the global warming since the mid-20th century is very likely due to human activities.Benefits and costs of climate change for [human] society will vary widely by location and scale. Some of the effects in temperate and polar regions will be positive and others elsewhere will be negative. Overall, net effects are more likely to be strongly negative with larger or more rapid warming.The range of published evidence indicates that the net damage costs of climate change are likely to be significant and to increase over time.The resilience of many ecosystems is likely to be exceeded this century by an unprecedented combination of climate change, associated disturbances (e.g. flooding, drought, wildfire, insects, ocean acidification) and other global change drivers (e.g. land-use change, pollution, fragmentation of natural systems, over-exploitation of resources).Some scientific bodies have recommended specific policies to governments and science can play a role in informing an effective response to climate change, however, policy decisions may require value judgements and so are not included in the scientific opinion.No scientific body of national or international standing maintains a formal opinion dissenting from any of these main points. The last national or international scientific body to drop dissent was the American Association of Petroleum Geologists, which in 2007 updated its statement to its current non-committal position. Some other organizations, primarily those focusing on geology, also hold non-committal positions.
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