| Berichte über den Klimawandel - Globale Berichte |
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IPCC-Bericht
zum Klimawandel - 4th Assessment Report |
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Klima Informationen |
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| Intergovernmental
Panel on Climate Change - Fourth Assessment Report |
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| Climate Change Impacts, Adaptation and Vulnerability |
April
2007, Working Group II Contribution
Current
knowledge about observed impacts of climate change on the natural and human
environment
| Introduction |
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This
Summary sets out the key policy-relevant findings of the Fourth Assessment
of Working Group II of the Intergovernmental Panel on Climate Change (IPCC).
The
Assessment is of current scientific understanding of impacts of climate
change on natural, managed and human systems, the capacity of these systems
to adapt and their vulnerability. It builds upon past IPCC assessments
and incorporates new knowledge gained since the Third Assessment.
Statements
in this Summary are based on chapters in the Assessment and principal sources
are given at the end of each paragraph.
Current
knowledge about observed impacts of climate change on the natural and human
environment
A
full consideration of observed climate change is provided in the IPCC Working
Group I Fourth Assessment. This part of the Summary concerns the relationship
between observed climate change and recent observed changes in the natural
and human environment.
The
statements presented here are based largely on data sets that cover the
period since 1970. The number of studies of observed trends in the physical
and biological environment and their relationship to regional climate changes
has increased greatly since the Third Assessment in 2001. The quality of
the data sets has also improved. There is, however, a notable lack of geographic
balance in data and literature on observed changes, with marked scarcity
in developing countries.
These
studies have allowed a broader and more confident assessment of the relationship
between observed warming and impacts than was made in the Third Assessment.
That Assessment concluded that - here is high confidence that recent regional
changes in temperature have had discernible impacts on many physical and
biological systems.
From
the current Assessment we conclude the following.
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| Source:
IPCC; UNEP and WMO, 6 April 2007 |
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Externe
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| Intergovernmental
Panel on Climate Change (IPCC) IPCC |
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Environment Programme (UNEP) UNEP |
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