Is a global food shortage looming?

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Can food production keep pace with demand?

Cuts in research threaten ability to keep pace with growing demand

Staff Report

FRISCO — A top food expert says the world could be facing a serious food shortage in 40 years, when production won’t be able to keep up with growing demand.

“For the first time in human history, food production will be limited on a global scale by the availability of land, water and energy,” said Dr. Fred Davies, senior science advisor for the U.S. Agency for International Development. “Food issues could become as politically destabilizing by 2050 as energy issues are today.” Continue reading

Greenland’s ice sheet, past, present and future

A new study of the Greenland snowpack reached surprising conclusions about concentrations of carbon monoxide.

A new study of Greenland ice cores suggests parts of the ice sheet persisted through previous global warming spells.

Will there be a meltdown?

Staff Report

FRISCO — At least some parts of the Greenland ice sheet likely survived some of the warmest interludes in the Earth’s geologic climate history, researchers said last week as they announced findings of a study that discovered an ancient tundra landscape preserved under the Greenland Ice Sheet, below two miles of ice.

“We found organic soil that has been frozen to the bottom of the ice sheet for 2.7 million years,” said University of Vermont geologist and lead author Paul Bierman. The finding provides strong evidence that the Greenland Ice Sheet has persisted much longer than previously known, enduring through many past periods of global warming. Continue reading

Morning photo: Sunday set

Got color?

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Summit sunset.

FRISCO — After a snowy start to April, winter finally relaxed its grip late in the month, with warmer days and at least a handful of clear mornings and evenings. Nothing against plentiful snow — I love it — but after months of shooting gleaming white snowscapes, it’s nice to get some color back in the scene, and it feels good to hike around on bare ground. Plus, the first wildflowers are starting to show (pasque flowers along the Ptarmigan Trail), and even though the early displays are modest, all the winter moisture should translate into a brilliant display of blooms the next few months. Click on the photos to see them full size, and check our online gallery at Fine Art America for more Summit County nature and landscape photos. Continue reading

Mediterranean fossils offer new climate clues

Findings shed new light in links between temperatures, CO2 and glaciation

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How will Antarctic ice sheets and glaciers respond to global warming? bberwyn photo.

Staff Report

FRISCO — The relationship between global temperatures and the massive glaciation of historic ice ages may be a bit more complex than previously believed.

By studying the chemical composition of Mediterranean Sea fossils as old as 5.3 million years, scientists found a new way to assess sea-level changes and deep-sea temperature variability over the past 5.3 million years. The findings will result in a better understanding of ice age climate, and could offer new insight into the relationship between carbon dioxide levels, global temperatures and sea levels. Continue reading

Biodiversity: Study shows continued threat to green sea turtles in Central America

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A green sea turtle cruises the sea bottom in this NOAA image.

Relentless fishing pressure pinches population

Staff Report

FRISCO — Endangered green sea turtles aren’t getting much of a break in Central America, where a 20-year assessment shows steeply declining catch rates in Nicaragua — as much as 56 percent in the past two decades, according to conservation scientists with the Wildlife Conservation Society and the University of Florida.

The researchers estimate that more than 170,000 green turtles were killed between 1991 and 2011, with catch rates peaking in 1997 and 2002 and declining steeply after 2008, likely resulting from over-fishing. The trend in catch rates shows a clear need for limits on this legal fishery, according to the report’s authors.

“The significant decrease in the catch rates of green turtles represents a concern for both conservationists and local, coastal communities who depend on this resource,” said Dr. Cynthia Lagueux, lead author of the study. “We hope this study serves as a foundation for implementing scientifically based limits on future green turtle take.” Continue reading

Western wildfires burning bigger and more often

Global warming seen as key factor in trend

wildfire acreage graph

Study documents significant trend in size and frequency of western wildfires.

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Western wildfires: How much bigger will they get?

By Summit Voice

FRISCO — The size and frequency of western wildfires have been increasing at a startling rate the past few decades, researchers said this week after scrutinizing satellite data to measure burned areas.

The number of wildfires larger than 1,000 acres increased by a rate of seven fires a year from 1984 to 2011 and the total areas burned grew by about 90,000 acres per year — an area the size of Las Vegas, according to the new study accepted for publication in Geophysical Research Letters, a journal published by the American Geophysical Union.

“We looked at the probability that increases of this magnitude could be random, and in each case it was less than one percent,” said Philip Dennison, an associate professor of geography at the University of Utah in Salt Lake City and lead author of the paper. Continue reading

Morning photo: Spring daze

Valley snow is melting fast

Twilight hike on Ptarmigan Mountain, Summit County, Colorado.

Twilight hike on Ptarmigan Mountain, Summit County, Colorado.

FRISCO — You know it was going to happen one of these days — even the biggest snow berms from the winter are melting down and hikers say that some local trails are already starting to dry out. That’s the case along the Ptarmigan Mountain Trail, where the first pasqueflowers of the season are blooming just in time for Easter. Continue reading

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