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Climate: New ice core record shows three distinct CO2 pulses about 10,000 years ago, as ice age ended

‘The natural carbon cycle can change a lot faster than we thought’

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How will Earth’s climate respond to the current rise in CO2?

Staff Report

FRISCO — One of the most detailed ice cores samples ever taken from Antarctica shows three sharp spikes of atmospheric carbon dioxide ushering in the end of the ice age about 10,000 years ago.

Based on the findings, the researchers said that the increase in atmospheric CO2 from the peak of the last ice age to complete deglaciation was about 80 parts per million, taking place over 10,000 years, with about half that increase occurring in just a few centuries.

They’re not sure what caused the sudden surges, but suspect it was a combination of factors, including ocean circulation, changing wind patterns, and terrestrial processes. But understanding the mechanisms that caused the changes would help determine what take the Earth in and out of ice age regimes. 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

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Satellites see Four Corners methane ‘hotspot’

‘From space, there are no hiding places …’

The Four Corners area (red) is the major U.S. hot spot for methane emissions in this map showing how much emissions varied from average background concentrations from 2003-2009 (dark colors are lower than average; lighter colors are higher). Image Credit:  NASA/JPL-Caltech/University of Michigan.

The Four Corners area (red) is the major U.S. hot spot for methane emissions in this map showing how much emissions varied from average background concentrations from 2003-2009 (dark colors are lower than average; lighter colors are higher).
Image Credit: NASA/JPL-Caltech/University of Michigan.

Staff Report

FRISCO — The Four Corners region is a methane hotspot, producing the largest concentration of the heat-trapping greenhouse gas methane seen over the United States. Atmospheric concentrations of the gas are more than three times the standard ground-based estimate, according to a new study of satellite data by scientists at NASA and the University of Michigan. Continue reading

Climate: Putting lipstick on the methane pig?

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Methane emissions: up, up … up.

EPA report shows the greenhouse gas dragon is far from tamed

Staff Report

FRISCO — The EPA may be putting lipstick on the methane pig by claiming that methane emissions dropped during the past year, according to watchdog groups who say the numbers put forth by the federal agency are misleading.

Overall, the EPA reported Sept. 30 that greenhouse gas emissions from large industrial facilities climbed by 20 million metric tons in 2013, up 0.6 percent from the previous year. Continue reading

Report eyes links between global warming and extreme weather events in 2013

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Scientists fine-tuning attribution studies

Staff Report

FRISCO — Australia’s 2013 heatwave was almost certainly fueled by building concentrations of heat-trapping pollution, a global team of researchers said this week, announcing the results of several studies exploring the link between climate change and regional weather patterns.

The new report, published in the Bulletin of the American Meteorological Society, looked at several extreme 2013 weather events in the context of climate, finding a connection to human-caused global warming in some events, but not in others. Continue reading

Climate: Are greenhouse gases causing the California drought?

‘This is an event that is more extreme than any in the observed record, and our research suggests that global warming is playing a role right now’

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Exceptionally dry conditions along parts of the West Coast that usually see copious moisture are highlighted in the NOAA soil moisture map taken from satellite data.

By Summit Voice

FRISCO — The California drought that will go down as the worst in the state’s recorded history may well be linked with increasing concentrations of heat-trapping pollutants — or not, depending who you ask.

In one new study, Stanford researchers said their analysis shows that formation of a persistent ridge of storm-blocking high pressure over the Pacific Ocean is three times more likely in presence of modern greenhouse gas concentrations.

But almost simultaneously, researchers with the National Oceanic and Atmospheric Administration said their survey of recent studies showed no link between global warming and lack of rainfall in California, though they did acknowledge the results of the Stanford led study, which focused on air pressure and the path of storms. Continue reading

Climate: Ocean acidification may be stunting coral growth

Mapping coral diseases is helping researchers determine the cause. Photo courtesy NOAA.

Coral growth is slowing dramatically along parts of the Great Barrier Reef. Photo courtesy NOAA.

Will the world’s coral reefs simply dissolve as oceans become more acidic?

Staff Report

FRISCO — Scientists monitoring the Great Barrier Reef said they’ve tracked a “perilous” 40 percent slowdown in coral growth rates since the 1970s.

The trend may be linked with increasing ocean acidification, according to the new study led  by researchers with the Carnegie Institution for Science.

The researchers compared current measurements of the growth rate of a section of Australia’s Great Barrier Reef with similar measurements taken more than 30 years ago. Continue reading

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