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Climate: Study eyes seafloor methane releases

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More methane means more global warming.

Thin permafrost cap at risk as oceans warm

Staff Report

FRISCO — Arctic scientists say a thin cap of seafloor permafrost that caps potent greenhouse gases will probably start to leak more as the oceans warm.

The research focused on the Kara Sea near Siberia’s Yamal Peninsula, where recent permafrost sinkholes have triggered concerns about increasing releases of methane. Continue reading

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Climate: USGS study tracks Chesapeake Bay warming

Chesapeake Bay in a Landsat photo.

Chesapeake Bay in a Landsat photo.

Water temps up 2.5 degrees Fahrenheit in 50 years

Staff Report

FRISCO— The huge Chesapeake Bay watershed — the country’s largest estuary — is warming steadily, USGS scientists say, warning that increase in temperatures is likely to have big consequences for the region’s ecosystems. Continue reading

Global warming: Many U.S. coastal areas to see frequent flooding sooner rather than later

High water at the mouth of the Mississippi River, near Venice, Louisiana.

High water at the mouth of the Mississippi River, near Venice, Louisiana. bberwyn photo.

Study eyes flood ‘tipping’ points

Staff Report

FRISCO — Rising sea levels will subject many coastal areas in the U.S. to frequent flooding by the middle of the century, according to a new NOAA study aimed at identifying flood “tipping points.” By 2050, a majority of U.S. coastal areas are likely to be threatened by 30 or more days of flooding each year the study concluded.

The research was led by NOAA scientists William Sweet and Joseph Park and published this week in the American Geophysical Union’s online peer-reviewed journal Earth’s Future. Continue reading

2014 Arctic report card documents ongoing global warming impacts

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A NASA Blue Marble view of Earth, with Greenland parts of the Arctic visible top-center.

Arctic warming twice as fast as rest of the planet

Staff Report

FRISCO — Parts of the Arctic Ocean are warming by nearly 1 degree Fahrenheit every decade, and overall, Arctic temperatures are rising twice as fast the global average, climate scientists said today as they released results of an annual Arctic Report Card.

The report documents increasing air and sea surface temperatures, declining reflectivity at the surface of the Greenland ice sheet, which reached a new record low last summer. And there is ongoing shrinkage of  spring snow cover on land and summer ice on the ocean.

The warming Arctic atmosphere was strongly connected to lower latitudes in early 2014 causing cold air outbreaks into the eastern USA and warm air intrusions into Alaska and northern Europe. Continue reading

Climate: Increasing CO2 killing oyster larvae

Love oysters? Then you should be worried about global warming.

Love oysters? Then you should be worried about global warming and ocean acidification. bberwyn photo.

Natural buffering can’t keep up with increasing ocean acidification

Staff Report

FRISCO — Oysters at their earliest stages of development are already feeling the impacts of ocean acidification, scientists said this week, explaining that oyster larvae are sensitive to saturation state, rather than carbon dioxide or pH per se.

The saturation state is a measure of how corrosive seawater is to the calcium carbonate shells made by bivalve larvae, and how easy it is for larvae to produce their shells. A lower saturation rate is associated with more corrosive seawater. Continue reading

Is melting Arctic sea ice shifting the jet stream?

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Is melting sea ice shifting the jet stream?

Study finds robust link between Arctic ice decline and severe Eurasian winter weather

Staff Report

FRISCO — If you feel like you’ve been on a weather roller coaster, maybe it’s because the jet stream has been behaving like one more and more often in recent years.

Instead of flowing around the mid-latitudes of the northern hemisphere with a few ripples, some years, the high-altitude river of air has been more like a writhing, out-of-control fire hose, snaking and looping, carrying huge surges of warm air north and cold. polar air south. At times, the jet stream has been getting stuck in that pattern for longer stretches. Continue reading

Environment: Tuesday roundup

Independent journalism in western Colorado

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Big issues at the climate talks in Lima, Peru.

By Bob Berwyn

FRISCO — If you primarily read this Summit Voice feed, which has been climate focused recently, you may have missed a few other recent stories I’ve done for the Colorado Independent. The past couple of weeks I’ve  covered issues in western Colorado, including fossil fuel development, public lands protection and even the ski industry from time to time, including this week’s story about a Colorado Supreme Court case. Continue reading

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