At century's end, the number of summertime storms that produce extreme downpours could increase by more than 400 percent across parts of the United States â including sections of the Gulf Coast, Atlantic Coast, and the Southwest â according to a new study by scientists at the National Center for Atmospheric Research (NCAR).
The study, published today in the journalÂ Nature Climate Change, also finds that the intensity of individual extreme rainfall events could increase by as much as 70 percent in some areas. That would mean that a storm that drops about 2 inches of rainfall today would be likely to drop nearly 3.5 inches in the future.
The Paris AgreementÂ was hailed as aÂ turning point for world governments tackling climate change, and it has now comeÂ into effect. What does this mean for the world â and where do we go from here?
On Friday, November 4, the Paris Agreement went intoÂ effect, meaning thatÂ the agreementÂ made last year by nearlyÂ 200 international delegates must now be honored.Â To recognizeÂ the consensusÂ coming into force, the United Nations stated thatÂ it is a moment to celebrateÂ â andÂ to take concerted action.
âWe remain in a race against time,â UN Secretary General Ban Ki-moonÂ emphasized.Â âNow is the time to strengthen global resolve, do what science demands and seize the opportunity to build a safer, more sustainable world for all.â
The effects of climate change will likely cause smaller but stronger storms in the United States, according to a new framework for modeling storm behavior developed at the University of Chicago and Argonne National Laboratory. Though storm intensity is expected to increase over todayâs levels, the predicted reduction in storm size may alleviate some fears of widespread severe flooding in the future.
The new approach,Â published today inÂ Journal of Climate, uses new statistical methods to identify and track storm features in both observational weather data and new high-resolution climate modeling simulations. When applied to one simulation of the future effects of elevated atmospheric carbon dioxide, the framework helped clarify a common discrepancy in model forecasts of precipitation changes.
A new study predicts that warming temperatures will contribute to the release into the atmosphere of carbon that has long been locked up securely in the coldest reaches of our planet.
Soil and climate expert Katherine Todd-Brown, a scientist at the Department of Energy'sÂ Pacific Northwest National Laboratory, is an author of the paper,Â published in the Dec. 1 issueÂ of the journal Nature, which draws upon data collected through 49 separate field experiments around the world.
The research was led by Thomas Crowther, formerly of Yale and now at the Netherlands Institute of Ecology, and colleague Mark Bradford at Yale. Scientists from more than 30 institutions across the globe, including PNNL, collaborated on the study.
Tornadoes and severe thunderstorms kill people and damage property every year. Estimated U.S. insured losses due to severe thunderstorms in the first half of 2016 were $8.5 billion. The largest U.S. impacts of tornadoes result from tornado outbreaks, sequences of tornadoes that occur in close succession. Last spring a research team led byÂ Michael Tippett, associate professor of applied physics and applied mathematics atÂ Columbia Engineering, published aÂ studyÂ showing that the average number of tornadoes during outbreaksâlarge-scale weather events that can last one to three days and span huge regionsâhas risen since 1954. But they were not sure why.
In a newÂ paper, published December 1 inÂ ScienceÂ via First Release, the researchers looked at increasing trends in the severity of tornado outbreaks where they measured severity by the number of tornadoes per outbreak. They found that these trends are increasing fastest for the most extreme outbreaks. While they saw changes in meteorological quantities that are consistent with these upward trends, the meteorological trends were not the ones expected under climate change.
Coral genotypes can survive for thousands of years, possibly making them the longest-lived animals in the world, according to researchers at Penn State, the National Marine Fisheries Service and Dial Cordy & Associates.
The team recently determined the ages of elkhorn coralsÂ Â â Acropora palmata â in Florida and the Caribbean and estimated the oldest genotypes to be over 5,000 years old. The results are useful for understanding how corals will respond to current and future environmental change.
Whether intentionally set to consume agricultural waste or naturally ignited in forests or peatlands, open-burning fires impact the global climate system in two ways which, to some extent, cancel each other out. On one hand, they generate a significant fraction of the worldâs carbon dioxide emissions, which drive up the average global surface temperature. On the other hand, they produce atmospheric aerosols, organic carbon, black carbon, and sulfate-bearing particulates that can lower that temperature either directly, by reflecting sunlight skyward, or indirectly, by increasing the reflectivity of clouds. Because wildfire aerosols play a key role in determining the future of the planetâs temperature and precipitation patterns, itâs crucial that todayâs climate models â upon which energy and climate policymaking depend â accurately represent their impact on the climate system.
Wildlife ecologists who study the effects of climate change assume, with support from several studies, that warming temperatures caused by climate change are forcing animals to move either northward or upslope on mountainsides to stay within their natural climate conditions.
But a new study of lowland and higher-mountain bird species by wildlife ecologists Bill DeLuca and David King at the University of Massachusetts Amherst now reports an unexpected and âunprecedentedâ inconsistency in such shifts. The majority of the mountain bird community responded against expectation and shifted downslope despite warming trends in the mountains. They say the result âhighlights the need for caution when applying conventional expectations to speciesâ responses to climate change.â
A key glacier in Antarctica is breaking apart from the inside out, suggesting that the ocean is weakening ice on the edges of the continent.
TheÂ Pine Island Glacier, part of theÂ ice shelfÂ that bounds theÂ West Antarctic Ice Sheet, is one of two glaciers that researchers believe are most likely to undergo rapid retreat, bringing more ice from the interior of the ice sheet to the ocean, where its melting would flood coastlines around the world.
A nearly 225-square-mile iceberg broke off from the glacier in 2015, but it wasnât until Ohio State University researchers were testing some new image-processing software that they noticed something strange in satellite images taken before the event.
CaliforniaâsÂ six years of droughtÂ has left 102 million dead trees across 7.7 million acres of forest in its wake, the U.S. Forest Service (USFS)Â announcedÂ following an aerial survey. If that is not horrendous enough, 62 million trees died in the year 2016 aloneâan increase of more than 100 percent compared to 2015.
âThe scale of die-off in California is unprecedented in our modern history,â Randy Moore, a forester for the U.S. Forest Service, told theÂ Los Angeles Times, adding that trees are dying âat a rate much quicker than we thought.â
Milder winters have led to earlier growing seasons and noticeable effects on the breeding habits of some predatory birds, according to research by Boise State biologists Shawn Smith and Julie Heath, in collaboration with Karen Steenhof, and The Peregrine Fundâs Christopher McClure. Their work was recently published in the Journal of Animal Ecology under the title âEarlier nesting by generalist predatory bird is associated with human responses to climate change.â
Every year, trade winds over the Sahara Desert sweep up huge plumes of mineral dust, transporting hundreds of teragrams â enough to fill 10 million dump trucks â across North Africa and over the Atlantic Ocean. This dust can be blown for thousands of kilometers and settle in places as far away as Florida and the Bahamas.
The Sahara is the largest source of windblown dust to the Earthâs atmosphere. But researchers from MIT, Yale University, and elsewhere now report that the African plume was far less dusty between 5,000 and 11,000 years ago, containing only half the amount of dust that is transported today.
A new multi-institutional study of the so-called global warming âhiatusâ phenomenon â the possible temporary slowdown of the global mean surface temperature (GMST) trend said to have occurred from 1998 to 2013 â concludes the hiatus simply represents a redistribution of energy within the Earth system, which includes the land, atmosphere and the ocean.
In aÂ paper published today inÂ Earthâs Future, a journal of the American Geophysical Union, lead authorÂ Xiao-Hai YanÂ of the University of Delaware, along with leading scientists from the National Oceanic and Atmospheric Administration (NOAA), National Center for Atmospheric Research (NCAR), National Aeronautics and Space Administration (NASA), Scripps Institution of Oceanography, and University of Washington, discuss new understandings of the global warming âhiatusâ phenomenon.
If society continues to pump greenhouse gases into the atmosphere at the current rate, Americans later this century will have to endure, on average, about 15 daily maximum temperature records for every time that the mercury notches a record low, new research indicates.
That ratio of record highs to record lows could also turn out to be much higher if the pace of emissions increases and produces even more warming, according to the study led by scientists at the National Center for Atmospheric Research (NCAR).
It turns out bird poop helps cool the Arctic.
Thatâs according to new research from Colorado State University atmospheric scientists, who are working to better understand key components of Arctic climate systems.
Half of all coral species in the Caribbean went extinct between 1 and 2 million years ago, probably due to drastic environmental changes. Which ones survived? Scientists working at the Smithsonian Tropical Research Institute (STRI) think one group of survivors, corals in the genusÂ Orbicella, will continue to adapt to future climate changes because of their high genetic diversity.
âHaving a lot of genetic variants is like buying a lot of lottery tickets,â said Carlos Prada, lead author of the study and Earl S. Tupper Post-doctoral Fellow at STRI. âWe discovered that even small numbers of individuals in three different species of the reef-building coral genusÂ OrbicellaÂ have quite a bit of genetic variation, and therefore, are likely to adapt to big changes in their environment.â
Rudy BoonstraÂ has been doing field research in Canadaâs north for more than 40 years.
Working mostly out of the Arctic Instituteâs Kluane Lake Research Station in Yukon, the U of T Scarborough biology professor has become intimately familiar with Canadaâs vast and unique boreal forest ecosystem.
But it was during a trip to Finland in the mid-1990s to help a colleague with field research that he began to think long and hard about why the boreal forest there differed so dramatically from its Canadian cousin. This difference was crystallized by follow-up trips to Norway.
This year is on track to become the hottest year on record, with global temperatures measuring 1.2 degrees Celsius (2.2 F) above pre-industrial levels, according to theÂ World Meteorological Organization(WMO).Â
Most studies of global climate change attempt to predict what might happen to the Earth as temperatures rise in future.Â A new study representing an international collaboration by ecologists and conservation biologists shows that global changes in climate have already impacted every aspect of life on Earth, from genes to entire ecosystems. It was published in the prestigious journal Science on November 10, 2016.Â
The research team, led by the University of Florida and with participation from the University of Hong Kong, showed that of a total of 94 ecological processes evaluated globally, 82% of them showed evidence of impact from climate change.Â Land, freshwater and marine ecosystems and species have all been all affected, and consequential impacts on people could range from increased pests and disease outbreaks, to unpredictable changes in fisheries and decreasing agriculture yields.Â
A commentary on what should be included in the next IPCC special interdisciplinary report on oceans and the cryosphere has been released today inÂ NatureÂ by Daniela Schmidt, Professor of Palaeobiology from the University of Bristol and Philip Boyd, a professor of marine biogeochemistry from the Institute for Marine and Antarctic Studies, University of Tasmania.
The IPCC is an international body which was set up in 1988 to assess the science related to climate change.
Currently on its sixth assessment cycle, the goal of the IPCC is to inform policymakers of the science on climate change, the impacts, future risks and potential options for adaption and mitigation.
The latest IPCC report had for the first time chapters dedicated to the Oceans. This year, the IPCC are going one step further with a special interdisciplinary report on the ocean and the cryosphere which will be published in 2019.
A full 30 percent of the worldâs electricity generation comes under the umbrella of just nine energy companies, and they have just joined forces to ramp up technology investments aimed at decarbonization. The global, collaborative effort was announced earlier this week by the companiesâ nonprofit organization, the Global Sustainable Electricity Partnership.
To be clear, the decarbonization announcement leaves plenty of wiggle room for âcleanâ coal and natural gas, at least in the near future. However, a look at the groupâs sole U.S. member, American Electric Power, demonstrates that a Republican administrationÂ cannot stop the global transition to low and zero-carbon electricity.
Climate change has already impacted nearly every aspect of life on earth, according to aÂ new studyÂ in the journalÂ Science. Warming global temperatures have altered everything from entire ecosystems down to the individual genes of species.Â
The Alps are steadily âgrowingâ by about one to two millimeters per year. Likewise, the formerly glaciated subcontinents of North America and Scandinavia are also undergoing constant upward movement. This is due to the fact that at the end of the Last Glacial Maximum (LGM) about 18,000 years ago the glaciers melted and with this the former heavy pressure on the Earthâs surface diminished. The ice reacted rapidly to climate change at that time whereas the Earthâs crust is still responding today to this relatively sudden melting of ice.Â
The dramatic decline of Iranâs Lake Urmiaâonce the second-largest hypersaline lake in the worldâhas both direct human and climatic causes, according to a new study published in the Journal of Great Lakes Research. Â Â The study was the first to compare the relative impact of climate and water management on the water flowing into the lake.
A new study by University of Miami (UM)Â Rosenstiel School of Marine and Atmospheric ScienceÂ researchers found that the Indian Oceanâs Agulhas Current is getting wider rather than strengthening. The findings, which have important implications for global climate change, suggest that intensifying winds in the region may be increasing the turbulence of the current, rather than increasing its flow rate.