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For Immediate Release
September, 27 2013, 06:40am EDT
Contact:
IPCC Press Office, Email:,ipcc-media@wmo.int,Jonathan Lynn, + 41 22 730 8066 or Werani Zabula, + 41 22 730 8120,IPCC Working Group I Media Contact, Email:,media@ipcc.unibe.ch,Pauline Midgley, +41 31 631 5620
Human Influence on Climate Clear, IPCC Report Says
STOCKHOLM
Human influence on the climate system is clear. This is evident in most regions of the globe, a new assessment by the Intergovernmental Panel on Climate Change (IPCC) concludes.
It is extremely likely that human influence has been the dominant cause of the observed warming since the mid-20th century. The evidence for this has grown, thanks to more and better observations, an improved understanding of the climate system response and improved climate models.
Warming in the climate system is unequivocal and since 1950 many changes have been observed throughout the climate system that are unprecedented over decades to millennia. Each of the last three decades has been successively warmer at the Earth's surface than any preceding decade since 1850, reports the Summary for Policymakers of the IPCC Working Group I assessment report, Climate Change 2013: the Physical Science Basis, approved on Friday by member governments of the IPCC in Stockholm, Sweden.
"Observations of changes in the climate system are based on multiple lines of independent evidence. Our assessment of the science finds that the atmosphere and ocean have warmed, the amount of snow and ice has diminished, the global mean sea level has risen and the concentrations of greenhouse gases have increased," said Qin Dahe, Co-Chair of IPCC Working Group I.
Thomas Stocker, the other Co-Chair of Working Group I said: "Continued emissions of greenhouse gases will cause further warming and changes in all components of the climate system. Limiting climate change will require substantial and sustained reductions of greenhouse gas emissions."
"Global surface temperature change for the end of the 21st century is projected to be likely to exceed 1.5degC relative to 1850 to 1900 in all but the lowest scenario considered, and likely to exceed 2degC for the two high scenarios," said Co-Chair Thomas Stocker. "Heat waves are very likely to occur more frequently and last longer. As the Earth warms, we expect to see currently wet regions receiving more rainfall, and dry regions receiving less, although there will be exceptions," he added.
Projections of climate change are based on a new set of four scenarios of future greenhouse gas concentrations and aerosols, spanning a wide range of possible futures. The Working Group I report assessed global and regional-scale climate change for the early, mid-, and later 21st century.
"As the ocean warms, and glaciers and ice sheets reduce, global mean sea level will continue to rise, but at a faster rate than we have experienced over the past 40 years," said Co-Chair Qin Dahe. The report finds with high confidence that 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.
Co-Chair Thomas Stocker concluded: "As a result of our past, present and expected future emissions of CO2, we are committed to climate change, and effects will persist for many centuries even if emissions of CO2 stop."
Rajendra Pachauri, Chair of the IPCC, said: "This Working Group I Summary for Policymakers provides important insights into the scientific basis of climate change. It provides a firm foundation for considerations of the impacts of climate change on human and natural systems and ways to meet the challenge of climate change." These are among the aspects assessed in the contributions of Working Group II and Working Group III to be released in March and April 2014. The IPCC Fifth Assessment Report cycle concludes with the publication of its Synthesis Report in October 2014.
"I would like to thank the Co-Chairs of Working Group I and the hundreds of scientists and experts who served as authors and review editors for producing a comprehensive and scientifically robust summary. I also express my thanks to the more than one thousand expert reviewers worldwide for contributing their expertise in preparation of this assessment," said IPCC Chair Pachauri.
The Summary for Policymakers of the Working Group I contribution to the IPCC Fifth Assessment Report (WGI AR5) is available at www.climatechange2013.org or www.ipcc.ch.
Key Findings
See separate Fact Sheet of Headline Statements from the WGI AR5 Summary for Policymakers, available at www.climatechange2013.org.
Background
Working Group I is co-chaired by Qin Dahe of the China Meteorological Administration, Beijing, China, and Thomas Stocker of the University of Bern, Switzerland. The Technical Support Unit of Working Group I is hosted by the University of Bern and funded by the Government of Switzerland.
At the 28th Session of the IPCC held in April 2008, the members of the IPCC decided to prepare a Fifth Assessment Report (AR5). A Scoping Meeting was convened in July 2009 to develop the scope and outline of the AR5. The resulting outlines for the three Working Group contributions to the AR5 were approved at the 31st Session of the IPCC in October 2009.
The Summary for Policymakers of the IPCC WGI AR5 was approved at the Twelfth Session of IPCC Working Group I meeting in Stockholm, Sweden, 23 to 26 September 2013 and was released on 27 September.
The Final Draft of the Working Group I report (version distributed to governments on 7 June 2013), including the Technical Summary, 14 chapters and an Atlas of Global and Regional Climate Projections, will be released online in unedited form on Monday 30 September. Following copy- editing, layout, final checks for errors, and adjustments for changes in the Summary for Policymakers, the full report of Working Group I will be published online in January 2014 and in book form by Cambridge University Press a few months later.
The Working Group I assessment comprises some 2,500 pages of text and draws on millions of observations and over 2 million gigabytes of numerical data from climate model simulations. Over 9,200 scientific publications are cited, more than three quarters of which have been published since the last IPCC assessment in 2007.
In this IPCC assessment report, specific terms are used to indicate the assessed likelihood of an outcome or a result. For those terms used above: virtually certain means 99-100% probability, extremely likely: 95-100%, very likely: 90-100%, likely: 66-100%. For more information see the
IPCC uncertainty guidance note: https://www.ipcc-wg1.unibe.ch/guidancepaper/ar5_uncertainty- guidance-note.pdf
The Intergovernmental Panel on Climate Change is an intergovernmental body of the United Nations. Its job is to advance scientific knowledge about climate change caused by human activities. The World Meteorological Organization and the United Nations Environment Programme established the IPCC in 1988.
LATEST NEWS
As Spying Renewal Stalls in Congress, Trump Pulls Plug on Pulte for DNI
"There is a path to reauthorizing FISA, but it will require enacting meaningful reforms," said House Democratic leaders.
Jun 11, 2026
After privacy advocates in Congress blocked proposed extensions of an expiring federal spying power on Thursday over a lack of reforms and concerns about newly appointed acting Director of National Intelligence Bill Pulte, President Donald Trump announced a different man as his official nominee for the post.
"I am pleased to announce the Nomination of very Highly Respected Jay Clayton, former Chairman of the Securities and Exchange Commission, the former Head of Sullivan & Cromwell, one of the most prominent and successful Law Firms anywhere in the World, and the current United States Attorney for the Southern District of New York, to be the next Director of National Intelligence and, importantly, to serve in my Cabinet," Trump wrote on Truth Social. "Few people anywhere in the Legal Community are respected at the level of Jay. I encourage the United States Senate to confirm Jay as soon as possible."
Trump's announcement came shortly after Senate Republicans' unsuccessful requests for unanimous consent to extend Section 702 of the Foreign Intelligence Surveillance Act (FISA)—which lets the US government spy on electronic communications of noncitizens located outside the country without a warrant—and a failed vote in the GOP-controlled House of Representatives.
"If Trump had announced this last night, or even this morning, it could've helped avoid a FISA/702 lapse," Punchbowl News reporter Andrew Desiderio said of Clayton's nomination. "Now the House is gone (and out next week) and the Senate is holding its final vote of the week right now—but most senators have already voted and dashed to the airport."
The Senate is due back on Monday, but Minority Leader Chuck Schumer (D-NY) told reporters after the Clayton announcement that it "doesn't matter what else they do, Pulte's got to be gone. He's still in that role."
As for the House, with both the recess and Section 702's Friday expiration looming, Speaker Mike Johnson (R-La.) had tried to get two-thirds majority support for an extension on Thursday. He secured support from seven Democrats—Reps. Henry Cuellar (Texas), Don Davis (NC), Jared Golden (Maine), Vicente Gonzalez (Texas), Josh Gottheimer (NJ), Susie Lee (Nev.), and Marie Gluesenkamp Perez (Wash.)—but 19 Republicans joined the rest of the Democratic members present for the 198-218 vote.
Democratic leaders who opposed the extension pointed to Trump's appointment of Pulte following Tulsi Gabbard's recent resignation announcement. As Federal Housing Finance Agency director, Pulte has sent criminal referrals to the US Department of Justice, alleging mortgage fraud by four of the president's political foes.
"Section 702 is a critical foreign intelligence authority, but we cannot in good conscience vote for reauthorization without significant reforms to protect both national security and the constitutional privacy rights of Americans," said House Minority Leader Hakeem Jeffries (D-NY), Democratic Whip Katherine Clark (D-Mass.), Caucus Chair Pete Aguilar (D-Calif.), Intelligence Committee Ranking Member Jim Himes (D-Conn.) and Judiciary Committee Ranking Member Jamie Raskin (D-Md.).
"Bill Pulte has no relevant national security experience. Consequently, his appointment is in defiance of the law that requires the director of national intelligence to have 'extensive' national security experience. The apparent motivation for his elevation is the demonstrated willingness of Bill Pulte to search government databases for alleged dirt on President Trump's chosen political enemies," they continued. "There is a path to reauthorizing FISA, but it will require enacting meaningful reforms. We oppose this bill to kick the can further down the road."
Explaining her vote against "this sham extension of FISA that would allow continued spying on the American people," Rep. Pramila Jayapal (D-Wash.), a key progressive leader in the chamber, said that "a warrant requirement would pass today if Republican leadership put it up for a vote."
"However, Trump is doubling down on his appointment of Bill Pulte, closing any pathways for negotiation," she said before Clayton was announced. "I voted no today, and will continue to vote no until a warrant requirement is in place to protect our civil liberties."
Hajar Hammado, senior policy adviser at Demand Progress, a leader in the massive coalition of civil society groups demanding reforms, said in a statement that "Speaker Johnson keeps trying and failing to jam through a no-reform FISA reauthorization, expecting different results—this time without even getting a simple majority of the House."
"If Johnson wants a FISA deal, all he has to do is allow amendment votes on privacy reforms," Hammado continued. "Adding warrant requirements to FISA is a path forward that has clear, bipartisan support. The only reason we're up against the deadline now is that congressional leaders and the White House keep ignoring this obvious reality and obstructing privacy reforms from getting a fair vote."
Elizabeth Goitein, co-director of the Brennan Center for Justice's Liberty and National Security Program, similarly said on social media that "Section 702 was in trouble well before Trump announced the appointment of Pulte as acting DNI (and by the way, Pulte could still be in that role through the midterm elections). The 702 renewal hit a wall because Republican leaders wouldn't allow votes on widely supported reforms."
After Johnson complained to reporters about the vote and said that "I pray that we do not have a serious calamity on our shores over the next few weeks," Jake Laperruque at the Center for Democracy & Technology said: "I'm sorry, you cannot demand the high ground claiming to be distraught about our national security when you are treating FISA as less important than blocking all reform votes. You sure as hell can't claim the high ground when treating it as less important than going on vacation."
While national security hawks have tried to use the deadline to force an extension, suggesting that a lapse would cause "a potential significant gap in foreign intelligence collection," privacy advocates such as Laperruque have emphasized that "the text of the law makes clear that this threat of collection suddenly going dark... is fearmongering and not a genuine possibility."
As Laperruque explained earlier this week: "So long as an approved FISA 702 certification is active, collection from communications providers based on directives stemming from that certification will continue. Because the FISA Court approved the most recent annual certifications this March, this lapse would not occur until 2027."
The House and Senate GOP's failures to extend Section 702 on Thursday came a day after Sen. John Cornyn (R-Texas) objected to a proposal from Sen. Ron Wyden (D-Ore.)—a leading privacy advocate—to pass by unanimous consent a nine-month renewal with warrant requirements. The Republican also opposed a five-week offer.
Calling out Cornyn's moves, Hammado said Wednesday that "surveillance hawks have spent all day screaming about how important it is to renew FISA, but then they just objected to a good faith deal that would reauthorize Section 702 with popular, bipartisan privacy reforms. The only thing stopping FISA from being renewed is congressional leadership's unexplained, persistent opposition to making the government get a warrant when it tries to access the private communications of Americans."
"Clear majorities in both parties, and of Americans in general, want a warrant requirement before renewing FISA," the Demand Progress campaigner added. "Why does congressional leadership prefer sunset over privacy?"
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‘Collective Failure of Humanity’: Nearly 118 Million Refugees Violently Displaced Worldwide
The number of people who were forcibly displaced at the end of last year dropped from 2024 levels, but that change was largely driven by people who were forced to return home, sometimes to precarious conditions.
Jun 11, 2026
The number of people forcibly displaced around the world fell last year for the first time in years, dropping by more than 5 million—but with that trend driven in part by countries that have forced refugees to return home, often to precarious or dangerous conditions, advocacy groups warned that the world's refugee and displacement crises are far from being solved.
At the end of last year, 117.8 million people were forcibly displaced around the world, according to data released Thursday by the United Nations High Commissioner for Refugees (UNHCR). That number includes 41.6 million refugees, 9 million asylum-seekers, and 68.7 million internally displaced people.
While the number of displaced people fell from 123.2 million in 2024, the UNHCR emphasized that the change reflected "a sharp increase in the returns of refugees, mostly to Afghanistan, Syria, and Sudan."
"Many of the returns occurred under adverse circumstances and the reintegration conditions remain extremely challenging," said the agency.
Jan Egeland, secretary general of the Norwegian Refugee Council (NRC), said that "in Afghanistan, millions were forcibly returned from neighboring Pakistan and Iran, and in [the Democratic Republic of] Congo some displacement camps were evacuated at gunpoint, sending thousands of families back to homes that no longer exist."
Of 2.9 million Afghans who were no longer considered forcibly displaced last year, most of their returns to their home country were "involuntary in nature due to changes in the policies of host countries."
In the US, the Trump administration last year terminated Temporary Protected Status for Afghan nationals, between 9,500 and 11,700 of whom were legally residing in the US. Hundreds of thousands of Afghans were deported from Iran, Pakistan, and Tajikistan last year.
"The first fall in global displacement in over a decade should be good news. Instead, it reflects misery on a historic scale," said David Milliband, president of the International Rescue Committee. "These numbers tell a story of both forced returns and forced displacement. People are returning to countries mired in crisis, most with no choice, with every route to safety collapsed around them."
The number of refugees who were successfully resettled dropped precipitously last year along with the number of people who were classified as displaced. Just 81,800 people found new homes through resettlement programs or sponsorship pathways, representing a year-on-year drop of more than half.
The top countries that continued to host refugees last year were Colombia, Turkey, and Germany, and more than 70% of refugees came from just six countries: Afghanistan, South Sudan, Sudan, Syria, Ukraine, and Venezuela.
Egeland emphasized that while the number of forcibly displaced people fell last year, "the number of people who have fled their home because of violence and conflict has nearly tripled over the last 15 years."
"The 117.8 million people now violently displaced around the globe would constitute the world’s 13th-largest country by population. Larger than Egypt, Germany, or the UK. A human toll of vast proportions, and a collective failure of humanity," said Egeland.
The numbers released by UNHCR indicated that while millions "continued to be uprooted" last year, "many more endured protracted crises with no solution in sight. The world continues to fail civilians caught by conflict and violence."
UNHCR warned that among those who remain forcibly displaced, 7 in 10 refugees have been exiled from their homes for at least five years with little prospect of ever leaving refugee camps with precarious living conditions.
“For too many refugees, displacement starts as a lifeline but lasts a lifetime," said Barham Salih, the UN high commissioner for refugees. "Humanitarian aid saves lives, but it is not the end point and does not enable refugees to become active agents in control of their futures. We need a paradigm shift that creates a new sense of hope and opportunity for people fleeing war and persecution."
Salih called for a reduction by more than half, over the next decade, in the number of refugees who are reliant on humanitarian assistance and are living in temporary shelters.
"The initiative would expand opportunities for voluntary returns, humanitarian visas, and relocation, while transitioning refugees from aid dependency to self-reliance through access to education, healthcare, financial services, and labor markets," said the UNHCR.
The large numbers of people who have been forced from their homes—and in a rising number of cases, forced to return home under duress—"are almost impossible to comprehend," said Egeland. "And as an increasingly nationalistic world becomes increasingly desensitized to what it truly means to be forced to flee home, the gap between decision makers and donors and displaced people continues to widen. This cannot be accepted as the new normal."
“As humanitarians our work is to support displaced people in their hour of greatest need," he added. “But we cannot do this without a world that is willing to stand up for humanity... We must support diplomatic solutions to end crisis, and fund aid to relieve suffering. We must protect civilians and stand up for international humanitarian law. We must all remember our humanity.”
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Dems Unveil Plan to Crack Down on Stock Buybacks as Trump Tax Cuts Fuel $4.8 Trillion 'Bonanza'
"It’s shameful that wealthy shareholders and executives are profiting while American families pay through the roof for groceries, gas, and rent."
Jun 11, 2026
A group of Senate Democrats on Thursday introduced legislation to hike taxes on US corporations that buy back their own stock as a new analysis estimated that major companies have spent nearly $5 trillion on share repurchases since President Donald Trump's 2017 tax cuts took effect.
The Democratic legislation, titled the Stock Buyback Accountability Act of 2026, would increase the current stock buyback excise tax from 1% to 4%, a change that experts say would raise around $240 billion in revenue over a 10-year period and likely dissuade some companies from engaging in buybacks, which artificially inflate share prices and further enrich shareholders and executives.
“After getting massive tax breaks from Donald Trump and Republicans in Congress, giant corporations are turning around and delivering stock buybacks at record highs,” said Sen. Elizabeth Warren (D-Mass.), who joined Senate Minority Leader Chuck Schumer (D-NY) and Sen. Ron Wyden (D-Ore.) in introducing the new bill to rein in what they called corporate America's "stock buyback bonanza."
“It’s shameful that wealthy shareholders and executives are profiting while American families pay through the roof for groceries, gas, and rent," said Warren. "This bill is an important step forward in making corporations pay their fair share."
The legislation's release coincided with an analysis conducted by the advocacy group Americans for Tax Fairness (ATF), which found that 100 of the largest corporations in the US have spent a combined $4.8 trillion on stock buybacks in the eight years since enactment of the 2017 Trump-GOP tax law.
"Every time Republicans sweep an election they shower corporations with new tax breaks, and then corporations shower their wealthy shareholders and executives with new stock buybacks."
Just 10 companies—Apple, Alphabet, Microsoft, Meta, Bank of America, JPMorgan Chase, Wells Fargo, Oracle, Nvidia, and Visa—were responsible for more than $2 trillion of the $4.8 trillion in total buybacks since 2017, ATF noted. The group estimated that, had the Stock Buyback Accountability Act been in place over the past eight years, the federal government could have raised around $200 billion in revenue from the 100 big corporations examined in the new analysis.
“The huge tax cuts corporations received from the 2017 Trump-GOP tax law—which were supposed to be used to increase employee pay and business investment—have instead been wasted on trillions of dollars of stock buybacks,” said ATF executive director David Kass. “Stock buybacks widen economic inequality by making already wealthy shareholders even richer. We need the Stock Buyback Accountability Act now more than ever.”
Stock buybacks were effectively prohibited in the US until 1982, as they were considered a form of market manipulation. Over four decades later, in 2025, stock buybacks by American companies surpassed $1 trillion—a record high.
"Every time Republicans sweep an election they shower corporations with new tax breaks, and then corporations shower their wealthy shareholders and executives with new stock buybacks," Wyden, the top Democrat on the Senate Finance Committee, said in a statement Thursday. "We need to dial up the tax on these buybacks, and if corporations decide they’re better off investing in workers and long-term growth, that’s a great outcome.”
ATF noted in its analysis that "the resulting rise in stock price created by a buyback is not taxed unless the stock is sold."
"With the top 5% of households owning 70% of all stocks, that is a big benefit for wealthy investors, who prefer the unrealized income which comes from buybacks to the traditional corporate dividends that are paid out and taxed on an annual basis," the group observed.
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