Tag Archives: oceans

PLEA Network

29 September 2016, Climate News Network, Speed of Arctic changes defies scientists.The Arctic climate is changing so quickly that science can barely keep track of what is happening and predict the global consequences, the UN says.  In an unusually stark warning a leading international scientific body says the Arctic climate is changing so fast that researchers are struggling to keep up. The changes happening there, it says, are affecting the weather worldwide. The World Meteorological Organisation (WMO) says: “Dramatic and unprecedented warming in the Arctic is driving sea level rise, affecting weather patterns around the world and may trigger even more changes in the climate system. “The rate of change is challenging the current scientific capacity to monitor and predict what is becoming a journey into uncharted territory.” The WMO is the United Nations’ main agency responsible for weather, climate and water. Its president, David Grimes, said: “The Arctic is a principal, global driver of the climate system and is undergoing an unprecedented rate of change with consequences far beyond its boundaries. Read More here

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22 September 2016, The Conversation, The Great Barrier Reef’s ‘new normal’ is a forlorn sight. Images of this year’s coral bleaching on the Great Barrier Reef shocked the world. Some tour operators expressed concern that the extensive and sometimes simplistic media coverage would hurt their businesses. The reef was a hot-button issue during the federal election, with both major parties pledging funding for programs to enhance water quality. Some politicians and tour operators expressed optimism about the reef’s ability to recover. It was the culmination of the longest, most extensive and most severe mass coral bleaching event ever recorded – an event that began in the North Pacific in mid-2014. The Great Barrier Reef was not spared, this year experiencing its hottest sea surface temperatures since records began – 29.1℃ in February (1.1℃ above the 1961-90 average), 29.1℃ (1.3℃ above average) in March and 27.8℃ (1.0℃ above average) in April. Evidence of bleaching was found on 93% of the more than 900 individual reefs surveyed that month, with the most severe impacts on the most pristine and isolated reefs of the far north. A preliminary estimate is that 22% of coral has now died, with 85% of these deaths occurring between Cape York and just north of Lizard Island. Read More here

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19 September 2016, The Guardian, Adani Carmichael coalmine faces new legal challenge from conservation foundation. Foundation appeals against ruling that endorsed mine’s approval by the commonwealth. The Australian Conservation Foundation has renewed its legal challenge to Adani’s Carmichael mine, appealing against a federal court ruling that endorsed its approval by the commonwealth. The ACF on Monday lodged an appeal against last month’s decision, which found the then federal environment minister, Greg Hunt, was entitled to find the impact on global warming and the Great Barrier Reef from the Queensland mine’s 4.6bn tonnes of carbon emissions “speculative”. The president of the ACF, Geoff Cousins, said Australia’s national environment protection laws were “broken” if the minister could approve “a mega-polluting coalmine – the biggest in Australia’s history – and claim it will have no impact on the global warming and the reef”. “If our environment laws are too weak to actually protect Australia’s unique species and places, they effectively give companies like Adani a licence to kill,” Cousins said. “Be in no doubt, Adani’s Carmichael proposal is massive and will lock in decades of damaging climate pollution if it goes ahead, further wrecking the reef. “The science is clear that we can have coal or the reef – but we can’t have both.” Read More here

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11 September 2016, Climate News Network, Ocean warming intensifies power of typhoons. The violence of typhoons that devastate Asian coastal regions is being magnified by rising sea surface temperatures caused by greenhouse gas emissions. The typhoons that have slammed into the coasts of east and southeast Asia have become more violent, increasing in intensity by between 12% and 15% over the last four decades, according to a new study. And the proportion of storms that meet the classification of category 4, with winds at 200 kilometres per hour, and category 5, with gusts of more than 250 kph, has at least doubled and may have tripled. The good news for mariners is that those tropical cyclones that stay over the open ocean have not got significantly worse. The windstorms that pound the land, though, are potentially more destructive. The cause of the intensity is an overall warming of ocean surface waters in the northwest Pacific. And the researchers say: “The projected ocean surface warming pattern under increasing greenhouse gas forcing suggests that typhoons striking eastern mainland China, Taiwan, Korea and Japan will intensify further. Read more here