If current carbon emissions and climate trends hold, the Far North can join the hurricane-soaked South as a place of wet-weather extremes, new research shows. Climate warming is likely to bring more episodes of heavy rain, above-freezing winter thaws and scorching hot summer days in the coming decades, says a study by scientists at the University of Alaska Fairbanks. By the end of the century, one-day maximum rainfalls will be 53 percent heavier than what is now considered the norm — the weather recorded from 1981 to 2010 — and maximum five-day rainfalls will be 50 percent heavier, according to the study.
Quantitative analysis has evidenced the acceleration system of melting ice: dark water surfaces absorb more heat than white ice surfaces, thus melting ice and making more water surfaces in the Arctic Ocean. Ice-covered sea areas in the Arctic Ocean during summer have nearly halved since the 1970s and 1980s, raising alarm that the ocean is shifting from a multiyear to a seasonal ice zone. The Intergovernmental Panel on Climate Change (IPCC) has forecasted summer ice cover in the polar ocean might disappear almost completely as early as 2050. Various factors have been cited as causes, including rising temperatures and changes in atmospheric circulation patterns.
(Click to enlarge) Global warming in the USA (Credit: Andrea Della Adriano/Flickr) There is something unusual about the Trump administration's appointment of NOAA's new deputy administrator: He believes climate change is real. Tim Gallaudet was nominated to be deputy administrator at NOAA last week. He will take the No. 2 slot at the agency [...]
The vulnerability and conservation value of sub-tropical reefs south of the Great Barrier Reef -- regarded as climate change refuges -- has been highlighted in a new study. University of Queensland School of Biological Sciences researcher Dr Brigitte Sommer said the study of Eastern Australian reefs revealed coral species would likely shift their distribution southward in response to climate change. Coral range expansions would likely vary among species depending on the species' characteristics and traits.
Within the next century, rising ocean temperatures around the Galápagos Islands are expected to make the water too warm for a key prey species, sardines, to tolerate. A new study by Wake Forest University biologists, published in PLOS ONE Aug. 23, uses decades of data on the diet and breeding of a tropical seabird, the Nazca booby, to understand how the future absence of sardines may affect the booby population. Researchers have studied diet, breeding and survival of Nazca boobies as part of a long-term study at Isla Española in the Galápagos Islands for more than 30 years. In 1997, midway through the study, sardines disappeared from Nazca booby diet samples and were replaced by the less-nutritious flying fish.
Panel sought to help businesses and state and local governments prepare for the effects of global warming. President Donald Trump's administration has disbanded a government advisory committee that was intended to help the country prepare for a changing climate. The US National Oceanic and Atmospheric Administration established the committee in 2015 to help businesses and state and local governments make use of the next national climate assessment. The legally mandated report, due in 2018, will lay out the latest climate-change science and describe how global warming is likely to affect the United States, now and in coming decades.
President Trump signed an executive order Tuesday that he said would streamline the approval process for building infrastructure such as roads, bridges and offices by eliminating a planning step related to climate change and flood dangers. Speaking in the lobby of Trump Tower in New York, Trump said that the approval process for projects was “badly broken” and that the nation’s infrastructure was a “massive self-inflicted wound on our country.” Trump said that “no longer” would there be “one job-killing delay after another” for new projects. But he did not provide any proposal on how his much-promised infrastructure program would be financed or what it would include.
Antarctica has been having a rough time of it lately, you may have heard. You know — greenhouse gases, warming oceans, trillion-ton icebergs breaking off the continent like a middle-aged man losing hair in the sink. Not the best century for the old South Pole. And now it turns out Antarctica has problems we didn't even know about. Deep problems. Volcanoes-under-the-ice problems, which doesn't sound healthy.
Around 717 million years ago, the Earth turned into a snowball. Most of the ocean, if not all of it, was frozen at its surface. The land, which was aggregated into one big supercontinent, was also covered in mile-thick ice. And then, everything changed. Volcanoes released enough carbon dioxide into the atmosphere to trap the sun’s heat and trigger global warming. The ice melted, and the surface of the sea reached temperatures of 120 to 140 degrees Fahrenheit. By 659 million years ago, the world had transformed from snowball to greenhouse. And just 14 million years later, the ice returned and the planet became a snowball for the second time.
A new study out of the University of Manitoba shows some lake predators are changing their behaviour due to climate change, which may have a wide-ranging effect on aquatic ecosystems. Researchers watched the feeding habits of lake trout at the IISD Experimental Lakes Area in northwestern Ontario over an 11-year span and found the fish can quickly adapt their behaviour — moving to deeper and cooler parts of the lake to feed — as water temperatures rise.
Sea-level rise isn’t just happening; it’s accelerating. And some areas of the United States—like Florida—are seeing “hot spots” where the ocean can creep up six times faster than average. Those are the findings of two new studies published yesterday, which have potentially troubling implications for urban planners trying to address sea-level rise. They also help explain why residents of Florida and North Carolina have seen sharp increases in coastal flooding in recent years.
A climate report based on work conducted by scientists in 13 federal agencies is under active review at the White House, and its conclusions about the far-reaching damage already occurring from global warming are at odds with the Trump administration’s views. The report, known as the Climate Science Special Report, finds it is “extremely likely” that more than half of the rise in temperatures over the past four decades has been caused by human activity — in contrast to Trump Cabinet members’ views that the mag nitude of that contribution is uncertain.