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22 July 2015, Climate News Network, Global warming’s record-breaking trend continues: Detailed update by hundreds of scientists on climate indicators in 2014 reveals highest recorded rises in temperatures, sea levels and greenhouse gases. Forget talk of a slowdown in global warming. Scientists say the climate is heading smartly in the opposite direction, with 2014 proving to be a record-breaking year. The US National Oceanic and Atmospheric Administration (NOAA), one of the most respected sources of climate science, says that last year “the most essential indicators of Earth’s changing climate continued to reflect trends of a warming planet”. Some − including rising land and ocean temperatures, sea levels and greenhouse gases − reached record highs. The authoritative report by the NOAA’s Centre for Weather and Climate at the National Centres for Environmental Information (NCEI), published by the American Meterological Society, draws on contributions from 413 scientists in 58 countries to provide a detailed update on global climate indicators. “The variety of indicators shows us how our climate is changing, not just in temperature but from the depths of the oceans to the outer atmosphere,” says Thomas R. Karl, director of the NCEI. Read More here

21 July 2015, The Guardian, Arctic sea ice volume showed strong recovery in 2013, Cooler temperatures revived sea ice levels suggesting a rapid recovery was possible if global warming was curbed, scientists say: Ice in the Arctic staged a surprise revival in 2013, bucking the long-term trend of decline, according to the first analysis of the entire ice cap’s volume. The revival was the result of cooler temperatures that year and suggests that, if global warming was curbed, the Arctic might recover more rapidly than previously thought. The shrinking Arctic ice cap is one of the best known impacts of climate change. The indication that it could be reversible is rare good news for a region where climate change has driven up temperatures far faster than the global average.

The extent of Arctic ice has shrunk by 40% since the late 1970s, when satellite measurements began. But getting comprehensive data on the thickness of the ice, rather than just its area, was difficult until the European Space Agency launched the Cryosat satellite in 2010. The satellite’s 88 million measurements, analysed in Nature Geoscience, show that from 2010-12 the Arctic ice volume fell by 14%, in step with the warming trend of the last few decades. But in 2013, the ice volume jumped up by 41%. “It’s fair to say that none of us were really expecting that,” said Rachel Tilling, at University College London and who led the study. But she dismissed the idea of a wider recovery of the ice cap, saying that climate change is still driving average temperatures up, despite significant variation from one year to the next. “It was a cold year – that happens.” In fact, while colder than recent years, the temperature in 2013 would have been regarded as normal as recently as the late 1990s. “This allowed thick sea ice to persist northwest of Greenland because there were fewer days when it could melt,” said Tilling. The research is significant as it shows the Arctic ice cap may be more resilient than expected. Tilling said: “You see Arctic sea ice as dwindling and in decline, but then there is a cold year and you get some of the ice back. It shows there is hope for Arctic sea ice, if you can turn the clock back to colder temperatures, which would need huge reductions in carbon emissions.” Read More here

20 July 2015, Science Daily, Changing climate lengthens forest fire season: Over a 35-year period, the length of forest fire seasons worldwide increased by 18.7 percent due to more rain-free days and hotter temperatures, according to research. The study examined weather data from 1979 through 2013 to determine how a changing climate impacts forest ecosystems. Over a 35-year period, the length of forest fire seasons worldwide increased by 18.7 percent due to more rain-free days and hotter temperatures, according to South Dakota State University professor Mark Cochrane, a senior scientist at the Geospatial Sciences Center of Excellence. The wildfire expert is part of a team of researchers led by W. Matt Jolly of the U.S. Forest Service Fire Science Laboratory that examined weather data from 1979 through 2013 to determine how a changing climate impacts forest ecosystems. “For things to burn, they have to have the proper conditions,” he explained. Four independent environmental factors increase the likelihood of wildfires — hotter temperatures, decreased relative humidity, more rain-free days and higher wind speeds. The researchers combined fire danger indexes from the United States, Canada and Australia with three global climate databases to create what Cochrane calls “an ensemble model.” They looked at the length of time and areas where conditions were conducive to fires. Their findings are published in Nature Communications. “Ecosystems are designed to withstand the normal climate situation, but we suspect that things aren’t normal anymore,” Cochrane said. On all the forested continents, except Australia, the fire seasons are getting longer, Cochrane explained. South America had the largest increase — 33 days in 35 years. In addition, the area affected by the longer fire season has doubled. Read More here

14 July Washington Post, Human impact on the oceans is growing — and climate change is the biggest culprit: The world’s oceans have suffered a lot at the hands of humans — ask any marine conservationist. Unsustainable fishing, pollution and the effects of climate change are just a few of the issues that worry scientists and environmentalists. While we have a good idea of which activities are causing harm to the ocean, scientists have been less clear on which ones are the most damaging and which regions of the ocean are getting the worst of it. Now, new research has allowed scientists to map the impacts of 19 different types of human activity that have harmed the ocean over a span of five years. The study was published Tuesday in the journal Nature Communications. The researchers used global-scale data to map the cumulative impacts of human activities between 2008 and 2013, pinpointing which areas are under increasing stress, which areas are experiencing a decrease and which human activities are having the biggest impacts in which areas. They found that nearly two-thirds of the ocean in experiencing an increase in these man-made impacts — and climate change is the worst of all, driving the majority of the changes the researchers observed. Read More here – access research maps here

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