Climate: Is this the Antarctic tipping point?

Study shows widespread, simultaneous ice shelf melting

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Satellite data shows sudden shift in ice shelf dynamics along the southern Antarctic Peninsula. @berwyn photo.

Staff Report

FRISCO — Along with studies showing dramatic changes in individual ice shelves in Antarctica, new research shows widespread changes in the region since 2009. Up until then, the Southern Antarctic Peninsula showed no signs of change.

But suddenly, multiple glaciers along a vast coastal expanse, measuring some 750km in length, suddenly started to shed ice into the ocean at a nearly constant rate of 60 cubic kilometers, or about 55 trillion liters of water, each year. This makes the region the second largest contributor to sea level rise in Antarctica and the ice loss shows no sign of waning. Continue reading

Study: No such thing as ‘normal’ weather in Colorado

Extreme storms can happen outside expected times

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A monsoon season lighting strike in Summit County. @bberwyn photo.

Staff Report

FRISCO — A new study led by Colorado-based scientists seems to reinforce the old saying that, when it comes to the state’s weather, there’s no such thing as normal.

The research aimed to track seasonal and geographical patterns of extreme weather events, especially the monster storms that create headaches for emergency responders and resources managers. But pinpointing those trends is not easy the weather experts found. Continue reading

Global warming: New NOAA study eyes link between Arctic meltdown and extreme weather in mid-latitudes

A warming Arctic is changing the configuration of the jet stream, which affects mid-latitude weather. GRAPHIC COURTESY NOAA.

A warming Arctic is changing the configuration of the jet stream, which affects mid-latitude weather. GRAPHIC COURTESY NOAA.

‘Too soon to tell …’

Staff Report

*More Summit Voice stories on this subject are here

FRISCO — There’s been lots of speculation and some early research on a possible link between soaring temperatures in the Arctic and extreme weather in North America and Europe, but the jury is still out, according to scientists with the National Oceanic and Atmospheric Administration.

NOAA’s James Overland was part of an international team that took a close look at possible connections and concluded that more research is needed.

“We are in the pre-consensus stage of a theory that there are links between the rapid warming of the Arctic and some severe weather events since 2007,” said Overland, lead author of the new study, “The melting Arctic and Mid-latitude weather patterns: Are they connected?” Continue reading

Global warming: Risk of exposure to extreme heat waves is growing dramatically

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Warm enough!

Population growth in warm zones is a big part of the equation

Staff Report

FRISCO — Extreme heat kills more people than any other type of extreme weather, and that mortality could increase significantly in coming decades as the Earth warms under a blanket of heat-trapping greenhouse gases.

Americans’ exposure to extreme heat could increase  four- to six-fold by 2050, a new study concludes, explaining that it’s not just the heat — the country’s population is  growing especially fast in the hottest regions of the country. Continue reading

Can a water plan save the Colorado River?

In-depth coverage of the Colorado water plan is unfolding in a new series of stories for the Colorado Independent

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Gotta love that Colorado River. Want to help save it? Conserve! @bberwyn photo.

By Bob Berwyn

FRISCO — Colorado’s creeping water crisis isn’t as dramatic as a wildfire or a flood, but its consequences could be just as severe. State and federal water experts say the state will see a huge gap between supply and demand within a few decades, and possibly sooner if regional drought continues. Continue reading

April 2015 ranks as 4th-warmest on record for Earth

Year to-date is record warm

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Only a few small areas of the globe were cooler than average in April 2015.

Staff Report

FRISCO — April’s globally averaged temperature was the fourth-warmest on record, at 1.33 degrees Fahrenheit above the 20th century average, according to federal climate trackers releasing the monthly Global State of the Climate update. Continue reading

Is the West’s power grid vulnerable to climate change?

‘In their development plans, power providers are not taking into account climate change impacts …’

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Renewable energy sources may be less susceptible to climate change impacts.

Staff Report

FRISCO — The Western power grid is vulnerable to projected global warming impacts, and should be climate-proofed to minimize the risk of future power shortages, according to a new study by  two Arizona State University engineers.

Their findings show that extreme heat waves and droughts and related changes in precipitation, air and water temperatures, air density and humidity, are all factors in the energy equation, and that those changes could significantly constrain the energy generation capacity of power plants. Continue reading

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