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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.
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100+ People Dead in Texas—Just 2 Months After Former National Weather Service Chiefs Warned of 'Nightmare' Scenario
While the agency and outside meteorologists say the NWS provided timely and accurate forecasts, the fatal flooding is generating fresh alarm about cuts and open positions.
Jul 07, 2025
As the official death toll from catastrophic flooding in Texas ticked above 100 on Monday, concerns over vacancies as well as job and potential funding cuts at the National Weather Service continued to mount—even as the NWS and independent meteorologists insisted that the agency had "issued timely warnings in advance of the deadly floods."
The flooding came just over two months after all living former directors of the NWS published a letter sounding the alarm about President Donald Trump's proposed budget for fiscal year 2026 and its cuts to the National Oceanic and Atmospheric Administration (NOAA), the parent agency of the NWS in the U.S. Department of Commerce.
The five men—Louis Uccellini, Jack Hayes, Brig. Gen. D.L. Johnson, Brig. Gen. John J. Kelly Jr., and E.W. "Joe" Friday—wrote on May 2 that "even if the National Weather Service remains level funded, given the interconnectedness of all of the parts of NOAA, there will be impacts to weather forecasting as well. We cannot let this happen."
"These proposed cuts come just days after approximately 300 National Weather Service... employees left the public service to which they had devoted their lives and careers," the ex-directors pointed out. "That's on top of the approximately 250 NWS employees who were fired as a result of their probationary status in new—often higher-level positions—or took the initial buyout offered by the Trump administration in early February."
"That leaves the nation's official weather forecasting entity at a significant deficit—down more than 10% of its staffing—just as we head into the busiest time for severe storm predictions like tornadoes and hurricanes," they continued. "Our worst nightmare is that weather forecast offices will be so understaffed that there will be needless loss of life. We know that's a nightmare shared by those on the forecasting frontlines—and by the people who depend on their efforts."
Discussing recent job reductions with The Associated Press on Monday, Uccellini, whose tenure leading NWS included Trump's first term, warned that "this situation is getting to the point where something could break."
"The people are being tired out, working through the night and then being there during the day because the next shift is short-staffed," he said. "Anything like that could create a situation in which important elements of forecasts and warnings are missed."
For the flooding in Texas, the NWS Austin-San Antonio office had five meteorologists working, rather than two, as part of its "surge staffing" protocol.
However, Tom Fahy, the legislative director for the NWS Employees Organization, a union that represents government workers, also told NBC News that the agency's Austin-San Antonio office does not have a permanent science officer, who conducts training for and implements new technology, or a warning coordination meteorologist, who has contact with media.
That office "is operating with 11 staff meteorologists and is down six employees from its typical full staffing level of 26," NBC reported. The nearby San Angelo office "is short four staff members from its usual staffing level of 23. The meteorologist-in-charge position—the office's top leadership position—is not permanently filled. The office is also without a senior hydrologist."
Despite some open positions at the two offices, the NWS began warning of potential flooding as early as Thursday morning, and as conditions worsened overnight, the agency issued its first warning for "life-threatening flash flooding" for parts of Kerr County at 1:14 am Central Time Friday, according to CNN.
"But questions remain about how many people they reached, whether critical vacancies at the forecast offices could have affected warning dissemination, and if so-called warning fatigue had been growing among residents in a region described as one of the most dangerous in the country for flash flooding," the network noted.
As Fahy put it to Politico: "The crux of this disaster is a failure of the last mile of communication... The forecasts went out, they communicated the forecasts, they disseminated the watches and warnings. And the dilemma we have is there was nobody listening at 4 o'clock in the morning for these watches and warnings."
Wisconsin-based meteorologist Chris Vagasky similarly told NBC that "the forecasting was good. The warnings were good. It's always about getting people to receive the message... It appears that is one of the biggest contributors—that last mile."
As The New York Times reported:
In an interview, Rob Kelly, the Kerr County judge and its most senior elected official, said the county did not have a warning system because such systems are expensive, and local residents are resistant to new spending.
"Taxpayers won't pay for it," Mr. Kelly said. Asked if people might reconsider in light of the catastrophe, he said, "I don't know."
As of Monday evening, 104 people are confirmed dead, most of them in Kerr County, which includes Camp Mystic, a Christian all-girls summer camp that lost at least 27 campers and counselors. The AP reported that "search-and-rescue teams carried on with the search for the dead, using heavy equipment to untangle trees and wading into swollen rivers. Volunteers covered in mud sorted through chunks of debris, piece by piece, in an increasingly bleak task."
In a statement to multiple news outlets, the NWS provided a detailed timeline of its alerts. The agency also said that it "is heartbroken by the tragic loss of life in Kerr County" and "remains committed to our mission to serve the American public through our forecasts and decision support services."
U.S. Senate Minority Leader Chuck Schumer (D-N.Y.) on Monday sent a letter to Roderick Anderson, acting inspector general at the Department of Commerce, urging an investigation into "the scope, breadth, and ramifications of whether staffing shortages at key local National Weather Service... stations contributed to the catastrophic loss of life and property during the deadly flooding."
"The roles left unfilled are not marginal, they're critical," he emphasized. "These are the experts responsible for modeling storm impacts, monitoring rising water levels, issuing flood warnings, and coordinating directly with local emergency managers about when to warn the public and issue evacuation orders. To put it plainly: They help save lives."
White House Press Secretary Karoline Leavitt lashed out at him and reporters for such scrutiny on Monday, saying that "unfortunately, in the wake of this once-in-a-generation natural disaster, we have seen many falsehoods pushed by Democrats such as Sen. Chuck Schumer and some members of the media. Blaming President Trump for these floods is a depraved lie, and it serves no purpose during this time of national mourning."
In addition to the president's so-called Department of Government Efficiency—previously led by billionaire Elon Musk, the richest person on Earth—pushing layoffs and retirements, Trump's administration is working to boost fossil fuels that drive the global climate emergency.
As Common Dreams reported earlier Monday, a study published by ClimaMeter found that the floods in Texas were caused by "very exceptional meteorological conditions" that cannot be explained merely by natural variability.
Former Common Dreams staff writer Kenny Stancil is a senior researcher at the Revolving Door Project, which has documented "Trump's attacks on disaster preparedness and response."
"The deadly Texas floods will not be the last manifestation of extreme weather turbocharged by fossil fuel pollution," Stancil wrote in a Monday blog post. "In an era of escalating climate threats, we need a stronger public sector with more resources to mitigate risks, help people weather storms, and adapt to the future."
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"We got people that work and repair the water mains and can't afford their water bill," said union leader Greg Boulware last week. "I don't want to be rich. We just want comfort inside the city that we serve daily."
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Philadelphia's largest municipal workers' strike in over 40 years is entering its second week after negotiations with the city broke down this weekend.
Over 9,000 sanitation workers, 911 dispatchers, water services workers, crossing guards, and other city employees walked off the job last week, demanding that the city increase their salary enough to meet the rising cost of living.
But even with trash piling up on the streets and other city services understaffed, Mayor Cherelle Parker (D) would not agree to the demands made by AFSCME District Council 33, Philadelphia's largest blue-collar union.
Parker has offered a pay increase of 8.75% over the next three years, which she described as historic.
But DC 33 president Greg Boulware said that's far too little for municipal workers, many of whom are among the city's "working poor," to survive.
"It's not like as if our members are making $80,000, $90,000 a year," Boulware said. "A 2% increase on those would be significantly higher than it would be on somebody making $40,000-$45,000 a year. So, her math truly is not mathing, and you're clearly not paying attention to the working people that are going on in this city."
The average municipal worker in Philadelphia makes around $46,000, which is $15,000 less than the median income in the city and less than half of what a single adult needs to live comfortably, according to a study by SmartAsset.
"We got people that work and repair the water mains and can't afford their water bill," Boulware said at a rally last week. "We got people that repair the runways at the airport and can't afford a plane ticket. I don't want to be rich. We just want a comfort inside the city that we serve daily."
The union initially asked for an 8% raise for the next four years, which the city dismissed. This weekend, they pared their proposal down to 5%, but the city still did not budge.
Parker has insisted that her smaller proposed increases are merely what is "fiscally responsible," and that the city cannot afford to offer more.
The union has disputed this, pointing out that Parker herself is budgeted to receive a 9% increase to her salary of more than $240,000. That increase alone is nearly half the current salary that the average DC 33 member makes in a year.
As of Monday, negotiations have stalled, with no clear end in sight. With a throng of picketers behind him, Boulware told NBC 10, a local affiliate, that the union was working on a third proposal, and that negotiations may resume Tuesday. But he seemed to expect more obstinacy from the city.
"We've been there to be able to sit and meet and negotiate," he said. "It doesn't seem like the city quite honestly wants to entertain any of the questions that we have about things and actually have a true dialogue... That's how you negotiate and that's not truly what's been going on."
Despite the city's refusal to budge, momentum around the strike has continued to grow. On Friday, rapper LL Cool J dropped out of a 4th of July festival in the city, saying, "There is absolutely no way I can perform across a picket line."
Other AFSCME councils around Pennsylvania have joined pickets in solidarity. This includes Philadelphia's Council 47, which represents thousands of "white collar" city workers.
With mounds of trash accumulating on streets, sometimes becoming as "tall as people," the environmental activists with the Sunrise Movement have also joined in the effort to pressure the city. On Monday, activists hauled bags of trash into the lobby of City Hall, labeled with the words "Meet DC 33 Demands" written in yellow tape.
AFSCME, meanwhile, has stated its resolve to fight on as the strike has gained national attention.
"City workers are holding the line until they get a FAIR contract with the wages and benefits they deserve," the national union's account wrote on X Monday. "One day longer, one day stronger, no matter what it takes."
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"You are not helping by snatching people!" yelled one local woman.
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Los Angeles residents lobbed profane insults at U.S. Customs and Border Protection agents on Monday after they swept through the city's MacArthur Park.
Los Angeles-based news station KTLA reports that masked, heavily-armed federal agents were in the park as "part of an apparent immigration raid" although exact details about the operation are not known as of this writing. A video taken on the scene by Mel Buer, an independent labor journalist in the California city and posted on social media website Bluesky showed many agents riding through the park on horseback.
Border patrol walking McArthur park here in LA
[image or embed]
— Mel Buer (@melbuer.bsky.social) July 7, 2025 at 1:49 PM
Los Angeles Mayor Karen Bass (D) reacted angrily after seeing reports of the agents—some of whom had visible Border Protection patches—in the park and she went to the area to tell them to cease their operations.
"Minutes before, there were more than 20 kids playing—then, the MILITARY comes through," Bass wrote in a post on the social media website X. "The SECOND I heard about this, I went to the park to speak to the person in charge to tell them it needed to end NOW. Absolutely outrageous."
Additional videos posted on Bluesky by Buer showed angry Los Angeles residents following the agents as they drove slowly down the street away from the park while pelting them with verbal abuse.
"Get the fuck out of here!" one male resident can be heard shouting at the agents.
"You guys are a bunch of pussies!" yelled another.
Shortly after this, a woman can be heard scolding the agents: "You are not helping by snatching people!"
After Bass spoke with what I assume is a DHS rep, they packed shit up and headed out. The whole neighborhood turned out to chase them out of the park. Some fruit was thrown, alot of yelling
[image or embed]
— Mel Buer (@melbuer.bsky.social) July 7, 2025 at 2:29 PM
California Attorney General Rob Bonta, a Democrat, condemned the federal operations in Los Angeles shortly after they occurred.
"The actions of [Immigration and Customs Enforcement] and CBP during the raids in Los Angeles are not about safety or justice—they're about meeting enforcement quotas and striking fear in communities," he wrote on Bluesky. "We've filed a brief supporting a challenge to ICE and CBP's unlawful practices. We won't back down and we won't be silent."
Los Angeles has become a focal point in the Trump administration's mass deportation operations. President Donald Trump last month deployed the National Guard to the city after some protests against ICE operations there turned violent.
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