NOAA: The December 2014 globally-averaged temperature across land and ocean surfaces was 0.77°C (1.39°F) above the 20th century average of 12.2°C (54.0°F), the highest on record for December since records began in 1880, surpassing the previous record set in 2006 by 0.02°C (0.04°F). This is the 10th consecutive month (since March 2014) with a global monthly temperature ranking among the seven highest for its respective month. December also marks the sixth month of 2014 to set a new monthly high temperature record.
by fred pearce
Boom may be turning to bust for fossil fuels. Market forces are combining with the prospect of new limits on carbon emissions from major economies such as China and the United States to prick the carbon bubble. Many analysts are now suggesting that — with prices falling and production costs rising — the coming year could be the moment when investors realize the game is up for the coal and oil industries.
Guardian: In 2002, the Nobel-winning scientist Paul Crutzen was at a meeting where the chairman kept using the term “Holocene” to describe the present day. This is, technically, correct: the Holocene began at the end of the last ice age. But Crutzen, who had won his Nobel for his work on the effects of ozone-depleting compounds (and so, in being instrumental in shrinking the holes in the ozone layer, could be said to have saved the planet), blurted out that we should actually be calling the present day the Anthropocene: the epoch influenced by humanity. When word of this proposal reached the Geological Society of London, and specifically its stratigraphy committee – the people who decide such matters – they thought about it for a year, and decided: yes, Anthropocene sounds about right.
We really are that influential – and destructively so. And yet if all civilisation were to end now, then 100m years hence, everything we have built would be compressed, in the geological record, to a layer of sediment “not much thicker than a cigarette paper”, as Elizabeth Kolbert puts it.
Guardian: A recent report by the International Bar Association suggests concrete steps to getting the law right for the victims of climate change.
We are learning to see climate injustice. We see it in the distressing stories of lives destroyed, epic droughts, floods and typhoons, and families and whole peoples uprooted. Climate injustice is not at first glance a legal problem any more than climate change itself is: it is economic, political, scientific. And yet, year after year, it is to law we turn for a solution in the hope that each next round of climate talks will yield a binding international agreement.
Today, faced with the reality of the human cost of climate change, all around the world people are turning to law for help, seeking a remedy, redress, some guarantee that it won’t happen again. This is the challenge of climate justice.
So far, the law has not seemed up to the task. Indeed, as the recent report of an International Bar Association (IBA) Task Force (pdf) has shown, some of our laws, both national and international, apparently make climate action more rather than less difficult. The report, however, has plenty of suggestions for improvement. Here are five recommendations that are politically palatable and could make a big difference.
UCL: A third of oil reserves, half of gas reserves and over 80% of current coal reserves globally should remain in the ground and not be used before 2050 if global warming is to stay below the 2°C target agreed by policy makers, according to new research by the UCL Institute for Sustainable Resources. – See more at: http://www.ucl.ac.uk/news/news-articles/0115/070115-fossil-fuels#sthash.cNOwykz5.dpuf
climate news network: Lumberjacks are selecting different trees, US fishermen are sailing further north to catch black sea bass, desert birds are nesting later in California and Arizona, and one kind of wildflower is changing shape in the Rocky Mountains − and all in response to climate change, according to new research.
None of these responses is simple, or necessarily ominous, and global warming is not the only factor at work. But all are nevertheless examples of adaptation to − so far – very modest changes in temperature.
EU JRC: 2013 saw global CO2 emissions from fossil fuel use and cement production reach a new all-time high. This was mainly due to the continuing steady increase in energy use in emerging economies over the past ten years. However, emissions increased at a notably slower rate (2%) than on average in the last ten years (3.8% per year since 2003, excluding the credit crunch years).
This slowdown, which began in 2012, signals a further decoupling of global emissions and economic growth, which reflects mainly the lower emissions growth rate of China. China, the USA and the EU remain the top-3 emitters of CO2,
Ministry of Foreign Affairs, DK: Denmark and Greenland will today file a submission regarding the continental shelf north of Greenland
EFI: Climate change is already altering the environment. Long-lived ecosystems such as forests are particularly vulnerable to the comparatively rapid changes in the climate system. A new international study published this week in Nature Climate Change shows that damage from wind, bark beetles, and wildfires has increased drastically in Europe’s forests in recent years. “Disturbances like windthrow and forest fires are part of the natural dynamics of forest ecosystems, and are not, therefore, a catastrophe for the ecosystem as such. However, these disturbances have intensified considerably in recent decades, which increasingly challenges the sustainable management of forest ecosystems”, says Rupert Seidl, BOKU Vienna, the principal researcher involved in the study.
CISL, together with the Cambridge Judge Business School and the support of the European Climate Foundation is summarising the latest climate science for the business community. These short, sector-specific briefings in different languages are based on the IPCC Fifth Assessment Report (AR5), the most comprehensive climate assessment. All documents have a Creative Commons License and are free to use.
SDSN: The Deep Decarbonization Pathways Project (DDPP) is a collaborative initiative to understand and show how individual countries can transition to a low-carbon economy and how the world can meet the internationally agreed target of limiting the increase in global mean surface temperature to less than 2 degrees Celsius (°C). Achieving the 2°C limit will require that global net emissions of greenhouse gases (GHG) approach zero by the second half of the century. In turn, this will require a profound transformation of energy systems by mid-century through steep declines in carbon intensity in all sectors of the economy, a transition we call “deep decarbonization.”
Guardian: UN issued with roadmap on how to avoid climate catastrophe
Climateprogress: On Monday, scientists at the National Oceanic and Atmospheric Administration’s Mauna Loa observatory in Hawaii told Climate Central that June would be be the third month in a row where, for the entire month, average levels of carbon dioxide were above 400 parts per million (ppm). In other words, that’s the longest time in recorded history that this much carbon dioxide has been in the atmosphere.
ScieneDaily: The Malaspina Expedition, led by the Spanish National Research Council, has demonstrated that there are five large accumulations of plastic debris in the open ocean that match with the five major twists of oceanic surface water circulation. In addition to the known accumulation of plastic waste in the North Pacific, there are similar accumulations in the central North Atlantic, the South Pacific, the South Atlantic and the Indian Ocean.
702—PERCENT INCREASE IN U.S. SHALE GAS PRODUCTION SINCE 2007
40—PERCENT SHALE GAS SHARE OF TOTAL U.S. PRODUCTION
47—PERCENT INCREASE IN U.S. ELECTRICITY GENERATED USING NATURAL GAS SINCE 2005
15,000,000—LITERS OF WATER AND CHEMICALS PUMPED INTO A TYPICAL FRACKING WELL
JRC: If no further action is taken and global temperature increases by 3.5°C, climate damages in the EU could amount to at least €190 billion, a net welfare loss of 1.8% of its current GDP. Several weather-related extremes could roughly double their average frequency. As a consequence, heat-related deaths could reach about 200 000.
The cost of river flood damages could exceed €10 billion and 8000 km2 of forest could burn in southern Europe. The number of people affected by droughts could increase by a factor of seven and coastal damage, due to sea-level rise, could more than triple
U.S. Regions and Business Sectors Face Significant Economic Risks From Climate Change
Risky Business: The American economy could face significant and widespread disruptions from climate change unless U.S. businesses and policymakers take immediate action to reduce climate risk, according to a new report released today. The report, “Risky Business: The Economic Risks of Climate Change in the United States,” summarizes findings of an independent assessment of the impact of climate change at the county, state, and regional level, and shows that communities, industries, and properties across the U.S. face profound risks from climate change. The findings also show that the most severe risks can still be avoided through early investments in resilience, and through immediate action to reduce the pollution that causes global warming.
NOAA: The combined average temperature over global land and ocean surfaces for May 2014 was record highest for this month, at 0.74°C (1.33°F) above the 20th century average of 14.8°C (58.6°F).
Guardian: May was hottest on Earth since records began
LANCELOT IS NOW ONLINE
Lancelot is the web application designed and produced by the Euro-Mediterranean Center on climate Change (CMCC) to provide an interactive, dynamic and integrated visualization of climate data on maps for a vast and differentiated audience. Select your indicators and explore hystorical data and climate projections provided by CMCC.
Glaciers in the high Himalayas and on the Tibetan Plateau are a vital source of water for millions of people in Asia, but scientists question what will happen to supplies if the rate of melting continues to rise due to climate-related factors.
A new study examining river basins in the Asia region suggests that amounts of water supplied to the area by glaciers and rainfall in the Himalayas will increase in the coming decades.
At first reading, that looks like good news, as an estimated 1.3 billion people in Pakistan, India, Bangladesh, Nepal, China and elsewhere are dependent for their water supplies on rivers fed by glaciers and snowmelt.
But the less welcome news is that scientists are unsure what will happen after 2050 if the rate at which glaciers melt continues to increase as a result of climate change.
Scientists say rising temperatures and more intense rainfall patterns in the higher Himalayas are causing the retreat of the majority of glaciers in the region.
Consistent increase in High Asia’s runoff due to increasing glacier melt and precipitation
WEC: The energy sector is facing increasing pressures from climate change. All segments of the industry will be affected by the changing global climate and the policy responses to it. So says a briefing published jointly by the World Energy Council (WEC), the University of Cambridge Institute for Sustainability Leadership (CISL), the Cambridge Judge Business School, and the European Climate Foundation.
Guardian: World’s energy systems vulnerable to climate impacts, report warns
ecoAmerica: The Psychological Impacts of Climate Change chronicles the likely psychological impacts of climate change, from stress, anxiety and depression to increases in violence and aggression and loss of community identity. It discusses the pathways through which these and other impacts on human well-being will arise, why some communities will be hit harder than others, and how psychological impacts interact with physical health. The report also includes guidance to help engage the public on climate change through the lens of mental health and well-being, as well as a list of tips for preparing and strengthening communities to withstand these impacts.
This report is a joint project between ecoAmerica and the American Psychological Association
The Fifth Assessment Report from the Intergovernmental Panel on Climate Change is the most up-to-date, comprehensive and relevant analysis of our changing climate.
Climate change intensifies existing pressures and brings new challenges to global peace and security. Societies’ responses to climate impacts may exceed the global or regional capacity to manage those responses peacefully.
This briefing reviews the ways climate change is challenging global security and the role the military can play in addressing that challenge.
The Earth Institute at Columbia University: Some 56 million years ago, a massive pulse of carbon dioxide into the atmosphere sent global temperatures soaring. In the oceans, carbonate sediments dissolved, some organisms went extinct and others evolved.
Scientists have long suspected that ocean acidification played a part in the crisis—similar to today, as manmade CO2 combines with seawater to change its chemistry. Now, for the first time, scientists have quantified the extent of surface acidification from those ancient days, and the news is not good: the oceans are on track to acidify at least as much as they did then, only at a much faster rate.
EPA: On June 2, 2014, the EPA proposed the Clean Power Plan that will maintain an affordable, reliable energy system, while cutting pollution and protecting our health and environment.
By 2030, the steady and responsible steps EPA is taking will:
· Cut carbon emission from the power sector by 30 percent nationwide below 2005 levels, which is equal to the emissions from powering more than half the homes in the United States for one year;
· Cut particle pollution, nitrogen oxides, and sulfur dioxide by more than 25 percent as a co-benefit;
· Avoid up to 6,600 premature deaths, up to 150,000 asthma attacks in children, and up to 490,000 missed work or school days—providing up to $93 billion in climate and public health benefits; and
· Shrink electricity bills roughly 8 percent by increasing energy efficiency and reducing demand in the electricity system.
US EPA: Today, the U.S. Environmental Protection Agency (EPA) released the third edition of a report, Climate Change Indicators in the United States. The report pulls together observed data on key measures of our environment, including U.S. and global temperature and precipitation, ocean heat and ocean acidity, sea level, length of growing season, and many others. With 30 indicators that include over 80 maps and graphs showing long-term trends, the report demonstrates that climate change is already affecting our environment and our society.
Consistent with the recently released National Climate Assessment, this report presents clear evidence that the impacts of climate change are already occurring across the United States. The report shows evidence that:
· Average temperatures have risen across the contiguous 48 states since 1901, with an increased rate of warming over the past 30 years. Seven of the top 10 warmest years on record have occurred since 1998.
· Tropical storm activity in the Atlantic Ocean, the Caribbean, and the Gulf of Mexico has increased during the past 20 years.
· Along the U.S. coastline, sea level has risen the most along the Mid-Atlantic coast and parts of the Gulf Coast, where some stations registered increases of more than 8 inches between 1960 and 2013.
· Glaciers have been melting at an accelerated rate over the past decade. The resulting loss of ice has contributed to the observed rise in sea level.
· Every part of the Southwest experienced higher average temperatures between 2000 and 2013 than the long-term average dating back to 1895. Some areas were nearly 2°F warmer than average.
· Since 1983, the United States has had an average of 72,000 recorded wildfires per year. Of the 10 years with the largest acreage burned, nine have occurred since 2000, with many of the largest increases occurring in western states.
· Water levels in most of the Great Lakes have declined in the last few decades.
guardian: The UK’s first carbon capture and storage (CCS) plants must be fast-tracked and get the go-ahead within a year, according to a report from MPs. It describes the technology, which traps the carbon dioxide from fossil fuel burning and buries it, as “vital to limit climate change”.
parliament.uk: Fast track carbon capture and storage pilot projects after ‘lost decade’ of delay.
MPs have urged the Government to fast-track final funding decisions on two pilot Carbon capture and storage (CCS) projects at Peterhead and Drax by early 2015, after years of delay in the ‘competition’ launched to provide capital support for the industry.
ScienceDaily: Three years of observations show that the Antarctic ice sheet is now losing 159 billion tons of ice each year — twice as much as when it was last surveyed. Scientists have now produced the first complete assessment of Antarctic ice sheet elevation change.
Malcolm McMillan, Andrew Shepherd, Aud Sundal, Kate Briggs, Alan Muir, Andrew Ridout, Anna Hogg, Duncan Wingham. Increased ice losses from Antarctica detected by CryoSat-2. Geophysical Research Letters, 2014; DOI: 10.1002/2014GL060111
ClimateCentral: The first measurement in excess of 400 ppm was made on May 9, 2013. This year, the level rose above that mark a full two months earlier, and has remained above 400 ppm steadily since the beginning of April. While the milestone is largely a symbolic one, it does illustrate how far emissions have risen from their preindustrial levels of 280 ppm.
NASA: A new study by researchers at NASA and the University of California, Irvine, finds a rapidly melting section of the West Antarctic Ice Sheet appears to be in an irreversible state of decline, with nothing to stop the glaciers in this area from melting into the sea.
The study presents multiple lines of evidence, incorporating 40 years of observations that indicate the glaciers in the Amundsen Sea sector of West Antarctica “have passed the point of no return,” according to glaciologist and lead author Eric Rignot, of UC Irvine and NASA’s Jet Propulsion Laboratory in Pasadena, California. The new study has been accepted for publication in the journal Geophysical Research Letters.
These glaciers already contribute significantly to sea level rise, releasing almost as much ice into the ocean annually as the entire Greenland Ice Sheet. They contain enough ice to raise global sea level by 4 feet (1.2 meters) and are melting faster than most scientists had expected. Rignot said these findings will require an upward revision to current predictions of sea level rise.
“This sector will be a major contributor to sea level rise in the decades and centuries to come,” Rignot said. “A conservative estimate is it could take several centuries for all of the ice to flow into the sea.”
E. Rignot, J. Mouginot, M. Morlighem, H. Seroussi, B. Scheuchl. Widespread, rapid grounding line retreat of Pine Island, Thwaites, Smith and Kohler glaciers, West Antarctica from 1992 to 2011.. Geophysical Research Letters, 2014; DOI: 10.1002/2014GL060140
Guardian: Western Antarctic ice sheet collapse has already begun, scientists warn. Two separate studies confirm loss of ice sheet is inevitable, and will cause up to 4m of additional sea-level rise. More: http://www.theguardian.com/environment/2014/may/12/western-antarctic-ice-sheet-collapse-has-already-begun-scientists-warn
University of Washington: The rapid melting of Greenland glaciers is captured in the documentary “Chasing Ice.” The retreat of the ice edge from one year to the next sends more water into the sea.
Now University of Washington atmospheric scientists have estimated that up to half of the recent warming in Greenland and surrounding areas may be due to climate variations that originate in the tropical Pacific and are not connected with the overall warming of the planet. Still, at least half the warming remains attributable to global warming caused by rising carbon dioxide emissions. The paper is published May 8 in Nature.
Greenland and parts of neighboring Canada have experienced some of the most extreme warming since 1979, at a rate of about 1 degree Celsius per decade, or several times the global average.
Qinghua Ding, John M. Wallace, David S. Battisti, Eric J. Steig, Ailie J. E. Gallant, Hyung-Jin Kim, Lei Geng. Tropical forcing of the recent rapid Arctic warming in northeastern Canada and Greenland. Nature, 2014; 509 (7499): 209 DOI: 10.1038/nature13260
Lloyds: Against a background of more frequent severe weather events, such as floods and windstorms, a new report from Lloyd’s highlights the importance of insurers ensuring that their catastrophe modelling tools keep pace with the effects of climate change.
Catastrophe Modelling & Climate Change, produced by Lloyd’s Exposure Management & Reinsurance team, explains how the insurance industry increasingly relies on computerised “probabilistic” catastrophe models from different providers to manage their catastrophe risk exposures.
Potsdam PIK: Overlapping impacts of climate change such as drought or flooding, declining crop yields or ecosystem damages create hotspots of risk in specific parts of Africa. These are for the first time identified in a study now published by the Potsdam Institute for Climate Impact Research. The uncertainties in assessing the impacts do not necessarily hamper but can inform development strategies, according to the scientists. Likelihood and potential severity of impacts can be weighed to decide on suitable adaptation measures.
Article: Müller, C., Waha, K., Bondeau, A., Heinke, J. (2014): Hotspots of climate change impacts in sub-Saharan Africa and implications for adaptation and development. Global Change Biology (online) [DOI:10.1111/gcb.12586]
GlobalChange.gov: The report confirms that climate change is affecting every region of the country and key sectors of the U.S. economy and society, underscoring the need to combat the threats climate change presents and increase the preparedness and resilience of American communities.
Guardian: Climate change has moved from distant threat to present-day danger and no American will be left unscathed, according to a landmark report due to be unveiled on Tuesday.
The National Climate Assessment, a 1,300-page report compiled by 300 leading scientists and experts, is meant to be the definitive account of the effects of climate change on the US. It will be formally released at a White House event and is expected to drive the remaining two years of Barack Obama’s environmental agenda.
ScienceDaily: New research by a team of Florida State University scientists shows the first detailed look at global land surface warming trends over the last 100 years, illustrating precisely when and where different areas of the world started to warm up or cool down.
The research indicates that the world is indeed getting warmer, but historical records show that it hasn’t happened everywhere at the same rate.
Fei Ji, Zhaohua Wu, Jianping Huang, Eric P. Chassignet. Evolution of land surface air temperature trend. Nature Climate Change, 2014; DOI: 10.1038/nclimate2223
Fraunhofer: In the new »Wind Energy Report Germany 2013« Fraunhofer IWES researchers confirm that offshore wind energy is increasing worldwide. While the UK is leading with 50% offshore market share, more than 2 GW are under construction in Germany. Japan enters the offshore market with prototypes of floating turbines.
The Telegraph: China and the United States – by far the world’s greatest emitters of carbon dioxide – have started far-reaching, if little-noticed, talks on how to cut the pollution, in what is being described as the most hopeful single development in tackling global warming for almost 20 years.
USA to day: For the first time in human history and likely for the first time in at least 800,000 years, the average level of carbon dioxide (CO2) in Earth’s atmosphere topped 400 parts per million for an entire month.
Imperial College London: A new study has shed fresh light on how climate change will affect global biodiversity by exploring different measurements of climate change together.
Scientists use climate change metrics, such as changes in seasonality or the emergence of new climates, to predict how climate change will impact biodiversity levels. These climate change metrics are typically studied in isolation, so it is difficult to accurately predict how changes in climate might impact levels of biodiversity.
For the very first time, a study published today in the journal Science has compared climate change metrics together, instead of in isolation, on a global scale, to look at how biodiversity will be impacted. This unique comparison reveals that when multiple dimensions of climate change are studied together, different regions emerge as threatened by different aspects of climate change. For example, this new research predicts that tropical areas are set to experience novel climates, much hotter than today’s tropical climates, that are not currently experienced by species anywhere on Earth. Such climates are projected to affect up to 62 per cent of the world’s tropical areas.
R. A. Garcia, M. Cabeza, C. Rahbek, M. B. Araujo. Multiple Dimensions of Climate Change and Their Implications for Biodiversity. Science, 2014; 344 (6183): 1247579 DOI: 10.1126/science.1247579
A NOAA-led research team has found the first evidence that acidity of continental shelf waters off the West Coast is dissolving the shells of tiny free-swimming marine snails, called pteropods, which provide food for pink salmon, mackerel and herring, according to a new paper published in Proceedings of the Royal Society B.
Researchers estimate that the percentage of pteropods in this region with dissolving shells due to ocean acidification has doubled in the nearshore habitat since the pre-industrial era and is on track to triple by 2050 when coastal waters become 70 percent more corrosive than in the pre-industrial era due to human-caused ocean acidification.
Limacina helicina shell dissolution as an indicator of declining habitat suitability owing to ocean acidification in the California Current Ecosystem.
N. Bednaršek, R. A. Feely, J. C. P. Reum, B. Peterson, J. Menkel, S. R. Alin and B. Hales
Published 30 April 2014 doi: 10.1098/rspb.2014.0123 Proc. R. Soc. B 22 June 2014 vol. 281 no. 1785 20140123
Stanford: Weather systems that bring rainstorms to many drought-prone areas of northern Africa, carry Saharan dust across the ocean and seed Atlantic hurricanes could grow stronger as a result of human-caused climate change, a new analysis by Stanford scientists suggests. Known as African easterly waves, or AEWs, these weather systems form above northern Africa during the summer season and travel east to west, toward the Atlantic Ocean.
C. B. Skinner, N. S. Diffenbaugh. Projected changes in African easterly wave intensity and track in response to greenhouse forcing. Proceedings of the National Academy of Sciences, 2014; DOI: 10.1073/pnas.1319597111
Guardian: In 2012, typhoon Bopha redefined how big a typhoon could get; a year later, Haiyan blew that redefinition out of the water. We need to channel funding into preparation and resilience
Guardian: We’re products of an industrial project, a project linked to fossil fuels. But humans have changed before and can change again
AGU: Wildfires across the western United States have been getting bigger and more frequent over the last 30 years – a trend that could continue as climate change causes temperatures to rise and drought to become more severe in the coming decades, according to new research. The number of wildfires over 1,000 acres in size in the region stretching from Nebraska to California increased by a rate of seven fires a year from 1984 to 2011, according to a new study accepted for publication in Geophysical Research Letters, a journal published by the American Geophysical Union. The total area these fires burned increased at a rate of nearly 90,000 acres a year – an area the size of Las Vegas, according to the study. Individually, the largest wildfires grew at a rate of 350 acres a year, the new research says.
Philip E. Dennison, Simon C. Brewer, James D. Arnold, Max A. Moritz. Large wildfire trends in the western United States, 1984-2011. Geophysical Research Letters, 2014; DOI: 10.1002/2014GL059576
IPCC: Concluding four years of intense scientific collaboration by hundreds of authors from around the world, this report responds to the request of the world’s governments for a comprehensive, objective and policy neutral assessment of the current scientific knowledge on mitigating climate change. The report has been extensively reviewed by experts and governments to ensure quality and comprehensiveness. The quintessence of this work, the Summary for Policymakers, has been approved line by line by member governments at the 12th Session of IPCC WG III in Berlin, Germany (7-11 April 2014).
Guardian: IPCC climate change report: averting catastrophe is eminently affordable, http://www.theguardian.com/environment/2014/apr/13/averting-climate-change-catastrophe-is-affordable-says-ipcc-report-un
An analysis of temperature data since 1500 all but rules out the possibility that global warming in the industrial era is just a natural fluctuation in the earth’s climate, according to a new study by McGill University physics professor Shaun Lovejoy.
The study, published online April 6 in the journal Climate Dynamics, represents a new approach to the question of whether global warming in the industrial era has been caused largely by man-made emissions from the burning of fossil fuels. Rather than using complex computer models to estimate the effects of greenhouse-gas emissions, Lovejoy examines historical data to assess the competing hypothesis: that warming over the past century is due to natural long-term variations in temperature.
S. Lovejoy. Scaling fluctuation analysis and statistical hypothesis testing of anthropogenic warming. Climate Dynamics, 2014; DOI: 10.1007/s00382-014-2128-2
Guardian: Burning remaining fossil fuel reserves will release carbon dioxide that will trigger different warming scenarios
The Trillion Tonne Communiqué is a global call to arms from businesses who take the science of climate change seriously and are demanding a proactive policy response.
The latest report from the Intergovernmental Panel on Climate Change (IPCC) sets out the link between the cumulative total of greenhouse gases in the atmosphere and the resultant global climate change. It warns that if atmospheric emissions exceed more than a trillion tonnes of carbon from CO2 then the global average temperature increase is likely to exceed 2°C.
The risks of this level of climate change are too significant to ignore and The Communiqué draws out the implications of this by identifying three clear goals that a policy framework that keeps cumulative emissions below a trillion tonnes will need to deliver on. These goals have been chosen because of their ability to clarify the scale and nature of the transformation required.
Over 1,000 companies from more than 60 countries have signed up to at least one previous Communiqué. Please sign The Trillion Tonne Communiqué and join the growing number of influential business leaders showing support for an urgent and robust policy response to climate change.
Guardian: BT, Shell and corporates call for trillion tonnes of carbon to stay in the ground, http://www.theguardian.com/environment/2014/apr/08/bt-shell-corporates-trillion-tonnes-carbon