The Azimuth Project
International Panel on Climate Change (changes)

Showing changes from revision #3 to #4: Added | Removed | Changed

Contents

Idea

The International Panel on Climate Change or IPCC is is a scientific intergovernmental body tasked with reviewing and assessing the most recent scientific, technical and socio-economic information produced worldwide relevant to the understanding of climate change. It was established in 1988 by the World Meteorological Organization (WMO) and the United Nations Environment Programme? (UNEP), two organizations of the United Nations.

The IPCC does not carry out its own original research, nor does it do the work of monitoring climate or related phenomena itself. It bases its assessment mainly on peer reviewed and published scientific literature.

A main activity of the IPCC is publishing special reports on topics relevant to the implementation of the UN Framework Convention on Climate Change? (UNFCCC), an international treaty that acknowledges the possibility of harmful climate change. Implementation of the UNFCCC led eventually to the Kyoto Protocol?. The IPCC is only open to member states of the WMO and UNEP.

Fifth (Fifth Assessment Report Report)[http://www.climatechange2013.org/images/report/WG1AR5_SPM_FINAL.pdf].

The IPCC Fifth Assessment Report, Climate Change 2013, consists of the following parts:

The summary for policy makers states, in the 5th assessment

is quoted verbatim here.

Observed Changes in the Climate System:

“Warming of the climate system is unequivocal, and since the 1950s, many of the observed changes are unprecedented over decades to millennia. The atmosphere and ocean have warmed, the amounts of snow and ice have diminished, sea level has risen, and the concentrations of greenhouse gases have increased.”

Atmosphere

“Each of the last three decades has been successively warmer at the Earth’s surface than any precding decade since 1850 (see Figure SPM.1). In the Northern Hemisphere, 1983–2012 was likely the warmest 30-year period of the last 1400 years (medium confidence).”

Cryosphere

Over the last two decades, the Greenland and Antarctic ice sheets have been losing mass, glaciers have continued to shrink almost worldwide, and Arctic sea ice and Northern Hemisphere spring snow cover have continued to decrease in extent (high confidence)“

Sea Level

“The rate of sea level rise since the mid-19th century has been larger than the mean rate during the previous two millennia (high confidence). Over the period 1901 to 2010, global mean sea level rose by 0.19 [0.17 to 0.21] m.”

Carbon and Other Biogeochemical Cycles

“The atmospheric concentrations of carbon dioxide, methane, and nitrous oxide have increased to levels unprecedented in at least the last 800,000 years. Carbon dioxide concentrations have increased by 40% since pre-industrial times, primarily from fossil fuel emissions and secondarily from net land use change emissions. The ocean has absorbed about 30% of the emitted anthropogenic carbon dioxide, causing ocean acidification.”

Drivers of Climate Change

“Total radiative forcing is positive, and has led to an uptake of energy by the climate system. The largest contribution to total radiative forcing is caused by the increase in the atmospheric concentration of CO2 since 1750.”

Understanding the Climate System and its Recent Changes

“Human influence on the climate system is clear. This is evident from the increasing greenhouse gas concentrations in the atmosphere, positive radiative forcing, observed warming, and understanding of the climate system.”

Evaluation of climate models

“Climate models have improved since the AR4. Models reproduce observed continental- scale surface temperature patterns and trends over many decades, including the more rapid warming since the mid-20th century and the cooling immediately following large volcanic eruptions (very high confidence).”

Fourth Assessment Report

The IPCC Fourth Assessment Report, Climate Change 2007, consists of the following parts:

Here is a critique of this report:

References

category: organizations