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Posts tagged 'Global Warming'

Key Points From Latest IPCC Report – Climate Change 2013

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Here are some key points from the latest IPCC report – Climate Change 2013.

If you would like to download the full report simply click on this link – IPCC – Climate Change 2013

* 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.

* Each of the last three decades has been successively warmer at the Earth’s surface than any preceding 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:

Climate Change 1

* Ocean warming dominates the increase in energy stored in the climate system, accounting for more than 90% of the energy accumulated between 1971 and 2010.

Climate Change SPM7

* 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.

* 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 1901–2010, global mean sea level rose by 0.19 [0.17 to 0.21].

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

Climate Change SPM10

* Global surface temperature change for the end of the 21st century is likely to exceed 1.5°C relative to 1850 to 1900 for all RCP scenarios except RCP2.6. It is likely to exceed 2°C for RCP6.0 and RCP8.5, and more likely than not to exceed 2°C for RCP4.5. Warming will continue beyond 2100 under all RCP scenarios except RCP2.6. Warming will continue to exhibit interannual-to-decadal variability and will not be regionally uniform.

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Climate and clean air coalition is launched

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The US, Mexico, Canada, Bangladesh and Ghana have launched an initiative to cut the other green house gases (other than CO2).  Methane, soot and HFCs contribute to around 1/3 to global warming. The US state department says that by tackling these gases we could slow warming by 0.5C.

This is a fantastic initiative, focused on tackling the low hanging fruit and less political than CO2. Let’s go for it, no brainer. But let’s not forget CO2…

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Using Positive Language Rather Than Climate Change or Global Warming

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Great article in The Economist about why people, especially in America, don’t believe in global warming. They cite psychological, economic, political, epistemological and metaphysical reasons with clever mixture of analysis and humour.

Really worth reading.

I also agree that we should move into a more positive, less divisive language.

Global warming and climate change for many people is a matter of belief, despite of science.

We need to move towards ‘good words’ such as innovation or opportunity. We should talk about investments and not about risks.

Nobody is opposed to energy efficiency or renewable technology, they are not political or belief issues, they are nice things.

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