Posted on September 5, 2014 by Bob Berwyn
Spruce beetle populations are surging in the southern Rocky Mountains.
Conservation advocates say more protection needed to protect critical ecosystem services
FRISCO — Forest degradation continues unchecked in many parts of the world and especially in the northern hemisphere boreal forest belt in Canada, Russia and Alaska, conservation advocates said this week, unveiling new maps showing forest impacts across more than 100 million hectares — an are three times the size of Germany.
Just since 2000, about 8 percent of the world’s remaining intact forest landscapes have been subject to some type of degradation from human activities, including logging and energy development.
The Greenpeace GIS Laboratory, the University of Maryland and Transparent World, in collaboration with the World Resources Institute and WWF-Russia, used satellite technology to determine the location and extent of the world’s last remaining large undisturbed forests, important harbors for biodiversity that are still unaffected by logging and infrastructure such as roads, mining and oil or gas development. Continue reading
Filed under: biodiversity, Environment, Forest health, forests | Tagged: Environment, forest fragmentation, Forest health, forests, global carbon cycle | Leave a comment »
Posted on September 3, 2014 by Bob Berwyn
Ocean boundaries redefined
Patches of plastic debris accumulate where they are concentrated by ocean currents.
FRISCO — Shredded bits of plastic now outweigh plankton in parts of the Pacific Ocean, posing a growing risk to to fish, turtles and birds that eat the trash. Efforts to limit the debris haven’t progressed much in the past few years, but new modeling of ocean currents may help researchers determine exactly where the waste is coming from.
“In some cases, you can have a country far away from a garbage patch that’s unexpectedly contributing directly to the patch,” said Gary Froyland, a mathematician at Australia’s University of New South Wales.
For example, the ocean debris from Madagascar and Mozambique would most likely flow into the south Atlantic, even though the two countries’ coastlines border the Indian Ocean. Continue reading
Filed under: Environment, Marine biology, ocean conservation | Tagged: Environment, Marine debris, ocean garbage patch, Oceanography | 1 Comment »
Posted on September 3, 2014 by Bob Berwyn
More midwinter snow, but faster spring meltout seems to be the new climate norm in the northern hemisphere.
‘As shifts in the timing of meltout occur, we lose an important and relatively stable snowpack reservoir …’
FRISCO —Dwindling spring snow cover in the northern hemisphere could accelerate the pace of global warming, as darker-colored ground emerges earlier in the year, absorbing more of the sun’s heat and intensifying atmospheric warming.
The spring decline is evident despite a trend toward more snow in mid-winter — but June snowcover in the northern hemisphere has been below average 10 years in a row. The downward trend is mainly due to warmer temperatures, not to any big changes in overall precipitation totals, according to the most recent IPCC climate assessment. Continue reading
Filed under: climate and weather, Environment, global warming, rivers, water | Tagged: climate change, Environment, global warming, snow cover extent, snowpack, water | Leave a comment »
Posted on September 2, 2014 by Bob Berwyn
New inventory assesses state’s woodland resources
FRISCO — Mortality is increasing and growth is slowing down in New Mexico’s forest lands, according to a new forest inventory released in late August. The only species showing overall growth are ponderosa and piñon pines, as well as junipers, as insects, wildfires drought and disease take an increasing toll on the state’s woodlands.
Forests grow on about 25 million acres in New Mexico, with 44 percent on private lands and 31 percent on national forest lands. About 40 percent (10.8 million acres) of the forests are piñon-juniper woodlands, by far the state’s most extensive forest type. Gambel oak is the most abundant tree species by number of trees, and ponderosa pine is the most abundant by volume or biomass. Overall, researchers estimate there are more than 6 billion live trees growing in the state.
The inventory documented the drought-induced piñon pine die-off in the early 2000s, estimating that about 8 percent the species died, but noted that the mortality rate has tapered off.New Mexico’s aspen forests, covering about 380,000 acres, held steady in the past decade. Continue reading
Filed under: climate and weather, Drought, Environment, forest fires, Forest health, forests, pine beetles and wildfires | Tagged: climate, drought, Environment, Forest health, Forest Service, forests, New Mexico, piñon-juniper forests | Leave a comment »
Posted on September 1, 2014 by Bob Berwyn
Taking a lunch break during a search for orchids in the Austrian countryside.
‘Agricultural practices are not necessarily at fault here – but our choice of food is’
FRISCO — Forget about greenhouse gas pollution from factories and transportation — by 2050 emissions of carbon dioxide and methane from food production alone could exceed targets set to prevent catastrophic global warming, University of Cambridge scientists warn in a new paper.
A major shift in food consumption norms has to be a big part of an overall plan to cut atmospheric concentrations of heat-trapping air pollution, especially given the current trend toward meat-heavy Western diets, the authors wrote in the journal Nature Climate Change. Continue reading
Filed under: agriculture, climate and weather, Environment, global warming | Tagged: climate change, Environment, global food production, global warming, greenhouse gases | 2 Comments »
Posted on August 31, 2014 by Bob Berwyn
‘The interaction between air, sea and ice in these seas is central to the stability of the Antarctic Ice Sheet and global sea levels’
A new study tracks global warming impacts around Antarctica. bberwyn photo.
By Summit Voice
FRISCO — Global warming is upsetting the delicate balance between Antarctic ice, air and sea, University of Southampton scientists said this week, releasing results of a study showing a rapid rise in sea level around the frozen continent.
Based on an analysis of 19 years worth of satellite data, the researcher said sea level around the coast of Antarctica has climbed 2 centimeters more than the global average, driven almost entirely by an increase in freshwater, which is less dense than saltwater. That can cause localized increases in sea level, said Craig Rye, lead author of the paper published in the journal Nature Geoscience. Continue reading
Filed under: Antarctica, climate and weather, Environment, global warming | Tagged: Antarctica, climate change, Environment, global warming, sea level | Leave a comment »
Posted on August 29, 2014 by Bob Berwyn
A fracking operation in Colorado. bberwyn photo.
Some conclusions flawed by lack of adequate data, environmental advocates say,
By Summit Voice
FRISCO — The battle over fracking probably won’t die down until humankind slurps up the last of the planet’s fossil fuel resources, and a new report by a California agency probably will intensify the debate.
The short-term study shows that fracking could threaten California ground water and pose human health risks, but was characterized as incomplete by environmental groups, who said it’s based on just a few months of data with big information gaps resulting from lack of complete reporting by state regulators. Continue reading
Filed under: energy, Environment, fracking | Tagged: BLM, California, energy, Environment, fracking | 1 Comment »