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.
New study tracks increase in summertime haze in Colorado wilderness
Longer and hotter droughts and wildfires are polluting the once clear blue skies of the high country in the West, according to new research from the University of Utah.
The study, published this week in the journal Environmental Research Letters, found a link between the severity of drought in the Intermountain West and summertime air quality. Climate projections suggest that drought and wildfire risk will continue to increase in coming decades.
Just a few days into the new year, European climate experts confirmed that 2016 is the warmest year on record since humans started tracking the climate. The analysis from C3S, part of the EU’s Copernicus earth observation program, show that 2016’s global temperature was about 1.3 degrees Celsius higher than typical for the middle years of the 18th century. 2016 was close to 0.2 degrees Celsius warmer than 2015, which was previously the warmest year on record. Continue reading “EU science agency says 2016 was record-warm”→
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.
Record and near-record readings from coast to coast
November 2016’s average temperature across the U.S. was 6.3 degrees Fahrenheit above the 20th century average, making it the second-warmest on record, behind 1999. According to the latest monthly update from the National Centers for Environmental Information, November is warming at a rate of 6.6 degrees Fahrenheit per century. Only January has been warming faster, at a rate of 10.5 degrees Fahrenheit per century.
Latest survey tallies more than 100 milion dead trees
California’s long-term drought has claimed another 36 million trees, the U.S. Forest Service said this week, announcing the results of a new aerial survey. Since 2010, more than 100 million trees have died across 7.7 million acres, the agency said.
The die-off intensified in 2016, after four years of drought, with mortality increasing 100 percent. Millions of additional trees are weakened and expected to die in the coming months and years. Forest Service leaders once again emphasized that their ability to address safety issues linked with dead trees has been severely hampered by climate change and limited resources.