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Salient points of IPCC report

The United Nations’ Intergovernmental Panel on Climate Change has released its assessment report on the current state of the world`s climate.



Stockholm: The United Nations’ Intergovernmental Panel on Climate Change has released its assessment report on the current state of the world`s climate.

* Human influence on the climate system is clear

* Extremely likely - 95 per cent certainty - that humans are the dominant cause of global warming

* Average surface temperatures up 0.85 degrees since 1880

* World temperatures to rise 2-4.8 degrees by 2100

* The rate of sea-level rise since the mid-19th century has been larger than the mean rate during the previous two millennia

* Atmospheric concentrations of carbon dioxide (CO2), methane and nitrous oxide have increased to unprecedented levels in at least the last 800,000 years

* CO2 concentrations have increased by 40 percent since pre-industrial times, primarily from fossil fuel emissions and secondarily from net land use change emissions

* More frequent hot and fewer cold temperature extremes as temperature increase

* Heat waves will occur with higher frequency and duration. Occasional cold winter extremes will continue to occur

* The contrast in precipitation between wet and dry regions and between wet and dry seasons will increase

* Oceans will continue to warm during the 21st century.

* Heat will penetrate from the surface to the deep ocean and affect ocean circulation

* It is very likely that the Arctic Sea ice cover will continue to shrink and thin

* The Northern Hemisphere`s spring snow cover will decrease during the 21st century as the global mean surface temperature rises

IANS

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