A federal recovery plan for endangered polar bears won’t halt the threat of climate change, but it could help dwindling populations of the great Arctic predators persist in the small patches of habitat that will remain after global warming melts most of the polar sea ice.
The plan, released Jan. 9, calls for reducing human-bear conflicts, collaboratively managing subsistence harvest, protecting denning habitat, and minimizing the risk of contamination from oil spills. Most of these actions are already underway, in partnership with Alaska Native communities, nonprofit groups, and industry representatives who participated in the plan’s creation. The plan also calls for increased monitoring and research. Continue reading “Feds finalize polar bear conservation plan”→
In another Christmas-themed story, I reported on a Norwegian study that showed how widespread grazing by reindeer affects the reflectivity in northern tundra regions. It turns out that when the ungulates munch shrubs and brush, they make the world cooler: Save the Reindeer, Save the Arctic.
Another sign that we may be near a climate tipping point is research from California showing that some severely burned forests just aren’t regenerating at all. The fires have become so big and so intense that all the seed stock trees are destroyed, leaving big cleared areas where there is no source for new growth — except for shrubs and brush that quickly grow to dominate the landscape and prevent new seedlings from taking root: California Forests Failing to Regrow After Intense Wildfires.
And some people think that they don’t have to worry about climate change because they heard global warming slowed down between 1998 and 2012. Not so, according to scientists who recalculated the rate of warming in the world’s oceans to show there was no hiatus: Already Debunked Global Warming ‘Hiatus’ Gets Another Dunking.
There wasn’t any relief from a wave of worrisome global warming news in the spring of 2016, including a study from Harvard showing how rising temperatures will send ozone levels surging to dangerous highs across parts of the U.S.
November’s average global temperature was 1.31 degrees Fahrenheit above the 20th century average, making it the fifth-warmest November on record. According to the latest global state of the climate report from the National Centers for Environmental Information, it was cooler than last year’s record by 0.41 degrees Fahrenheit, but 0.09 degrees warmer than the average for the 21st century.
According to the report, warmer-than-average conditions prevailed across most of the globe’s land areas, with record warmth in parts of central and southeastern Canada, where temperatures were at least 9 degrees Fahrenheit above the 1981–2010 average in many places. Other warm regions included the far northern tier of the United States along with a portion of the southwest, parts of western and southern Mexico, sections of eastern and west central Africa, and regions of some southeastern Asia island nations. Continue reading “2016 headed for new global temperature record”→
Remarkable changes with huge planetary implications
Earth’s climate control system — the Arctic — is changing so fast that researchers are having a hard time keeping up. In an effort to understand how the region is shifting toward a new state, a team of scientists spent nearly six months examining the younger and thinner sea ice that’s become ubiquitous in the past few years. They discussed their findings this week at the fall meeting of the American Geophysical Union in San Francisco.
“Many things we experienced took us by surprise,” said Mats Granskog, a research scientist at the Norwegian Polar Institute and chief scientist of the Norwegian young sea ICE, or N-ICE2015 project. “We saw that the new Arctic, with much thinner sea ice only three to four feet thick, functions much differently from the Arctic we knew only 20 years ago, when the ice was much thicker.”
One of the biggest concerns is that the reduced sea-ice coverage and thickness will lead to even more melting, the so-called Arctic amplification. Most of the solar energy that reaches Arctic snow and sea ice gets reflected back into space. But when the snow and ice is replaced by darker, open water, most of the energy gets absorbed and in turn helps melt more ice. Continue reading “Climate scientists track young, thin Arctic ice”→
Arctic sea ice extent set a new record low this near, heightening concerns that the pace of the Arctic meltdown is speeding up. Antarctic sea ice extent also declined to a record low for the month, with sea ice cover worldwide dropping to an exceptionally low level, according the scientists at the National Snow and Ice Data Center.
Specifically, the blanket of ice around the North Pole averaged 3.51 million square miles for the month, the lowest November in the satellite record, and 309,000 square miles below the record set in November 2006. Through 2016, the linear rate of decline for November is 21,400 square miles per year, or 5.0 percent per decade. Continue reading “Global sea ice at record low in November”→
The relationship between Arctic whales and sea ice is still largely a mystery, but there is increasing concern over how these species will adapt to climate related changes in sea ice. In a new study, researchers found the drastic sea ice changes under way in the Arctic could lead to more predation of beluga whales — and that could have “implications for population viability, ecosystem structure and the subsistence cultures that rely on them,” said Dr. Greg O’Corry-Crowe, a scientist with Florida Atlantic University. Continue reading “How do Arctic sea ice changes affect whales?”→