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Microclimates may buffer some streams from global warming

Low flows in high country streams this summer. PHOTO BY BOB BERWYN.

Microclimates may partially buffer some streams, at least temporarily, from warming air temperatures. bberwyn photo

‘The one constant is that a healthy watershed will be more resilient to climate change than one that isn’t healthy …’

Staff Report

FRISCO — Global warming is all but sure to raise stream temperatures in many areas, but it turns out that changes in air temperatures don’t offer a reliable proxy for projecting those changes.

Eapecially in the mountains streams of the West, topography and riparian conditions are huge factors in regulating stream temperatures.

The correlation between air temperature and stream temperature is surprisingly tenuous, according to stream ecologists at Oregon State University, who examined historic stream temperature data over a period of one to four decades from 25 sites in the western United States. Continue reading

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Global warming reshaping bird communities in Northeast

A backyard cardinal in Englewood, Florida. PHOTO BY BOB BERWYN.

Cardinals have become more common in the Northeast.

‘Climate change should not be viewed as the sole driver of changes in winter bird communities, but this signal is a pretty strong one for climate change’

Staff Report

FRISCO — Global warming is reshaping backyard bird communities in eastern North America, as once-rare birds are now common in the Northeast.

Cardinals, chipping sparrows and other warm-adapted species have greatly expanded their wintering range in a warmer world, a change that may have untold consequences for North American ecosystems, according to University of Wisconsin-Madison wildlife biologists Benjamin Zuckerberg and Karine Princé.

In a new paper published in Global Change Biology, Zuckerberg and Princé analyzed more than two decades of data on 38 species of birds gathered by thousands of citizen scientists through the Cornell University Laboratory of Ornithology’s Project FeederWatch. They found that birds typically found in more southerly regions are gradually pushing north, restructuring the communities of birds that spend their winters in northern latitudes. Continue reading

Study: Natural gas boom won’t slow global warming

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Increase in global gas production likely to displace renewable low carbon energy

Staff Report

FRISCO — Increasing production of natural gas won’t save the world from global warming, researchers said this week.

In the long run, a global abundance of inexpensive natural gas is likely to displace not just coal, but  also lower-emitting nuclear and renewable energy technologies such as wind and solar. Inexpensive natural gas would also accelerate economic growth and expand overall energy use, the study found.

“The effect is that abundant natural gas alone will do little to slow climate change,” said lead author Haewon McJeon, an economist at the Department of Energy’s Pacific Northwest National Laboratory. “Global deployment of advanced natural gas production technology could double or triple the global natural gas production by 2050, but greenhouse gas emissions will continue to grow in the absence of climate policies that promote lower carbon energy sources.” Continue reading

GAO report finds lagging response to ocean acidification

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Ocean acidification is an existential threat to many marine species and ecosystems.

Federal government has failed to implement several key steps required by 2009 law

By Summit Voice

FRISCO — Federal agencies well recognize the environmental threats of increasing ocean acidification, but so far, the response has been lackluster at best, according to the Government Accountability Office.

In a report issued this week, the GAO said federal agencies have been slow in implementing several requirements of the 2009 Federal Ocean Acidification Research and Monitoring Act, including outlining the budget requirements for implementing the research and monitoring plan. Continue reading

Study: Cutting carbon pollution pays off in a big way by reducing health care costs

Feds make progress on environmental justice.

Study shows how cutting carbon pollution pays huge dvidends by reducing health care costs.

‘Carbon-reduction policies significantly improve air quality’

Staff report

FRISCO — Adopting a carbon cap-and-trade program would easily pay for itself — and then some — by reducing health care costs associated with treating asthma and other medical conditions resulting from air pollution, MIT researchers said in a detailed study that looked at the comparative cost and benefits of three potential climate policies.

Policies aimed at cutting carbon emissions from sources like power plants and vehicles,  also lead to reductions in other harmful types of air pollution, the scientists said, publishing their findings last month in Nature Climate Change.

Overall, the study found that savings on health care spending and other costs related to illness can be big — in some cases, more than 10 times the cost of policy implementation. Continue reading

Wildlife advocates back in court on behalf of wolverines

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Wolverine habitat in the western U.S.

Groups say federal agency erred by denying Endangered Species Act protection

Staff Report

FRISCO — Wildlife advocates are once again heading to federal court to seek Endangered Species Act protection for rare wolverines, a species deemed as vulnerable to global warming because of its dependence on deep spring snow cover for denning and breeding.

Wolverines live in small numbers mainly in the northern Rocky Mountains. The wide-ranging mammals were hunted, trapped and poisoned to near-extinction during the settlement era, and now face a climate whammy that could melt the big snowbanks they need for reproduction.

The U.S. Fish and Wildlife Service proposed an endangered species listing in 2013 in a rule supported by the agency’s own scientific reports and by independent review panels, but then reversed course in May 2014, asserting that climate models are not accurate enough to pinpoint threats to wolverine habitat. Continue reading

Climate: Icebergs … in Florida?

Dawn in the Antarctic Sound. Click on the image for more ...

Iceberg tracks offer modern climate clues. bberwyn photo.

Study seeks abrupt climate change clues

Staff Report

FRISCO — Icebergs may have been drifting off the coast of Florida as recently as 21,000 years ago, university researchers said after developing a climate model that recreates ocean currents from the end of the last ice age.

The study implies that the mechanisms of abrupt climate change are more complex than previously thought, according University of Massachusetts Amherst oceanographer Alan Condron. The models are supported by the discovery of iceberg scour marks on the sea floor along the entire continental shelf. Continue reading

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