Archive for the ‘Climate Change’ Category

Apr15

Is the Atlantic a re-circulating bathtub?

atlantic ocean

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From the shore, we are likely to overlook the real dynamics of the Atlantic Ocean.  Surface and deep ocean currents stir its waters in a global circulation that each year carries more water than all the rivers of the world combined. (more…)

Mar28

The U.S. is emitting less carbon

NYC Power Plant

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In 2012, carbon dioxide emissions from energy use in the US reached the lowest level since 1994 and were 12% lower than their peak in 2007.   This is certainly good news, but just how good? (more…)

Mar25

The costs of a warmer Arctic

Arctic Ocean

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As the Arctic warms in response to rising concentrations of carbon dioxide and other greenhouse gases in Earth’s atmosphere, some eagerly anticipate the opening of the Northwest Passage for ship navigation.  Others applaud the potential to ramp up petroleum exploration and fishery efforts in the Arctic Ocean.  But, there are real costs to Arctic warming. (more…)

Mar19

Allocating carbon emissions

Carbon Emissions

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The recent report from the Intergovernmental Panel on Climate Change has adopted a different way of looking at reducing carbon dioxide emissions.  Since carbon dioxide largely stays in the atmosphere for centuries, the emphasis needs to be on our cumulative emissions over time rather than on tracking yearly totals. (more…)

Mar13

Hot nights in the greenhouse

Lodgepole Creek

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Physicians have long noted that deaths spike during heat waves.  Compared to periods of normal temperature, more people die of heart attack and stroke during hot periods.  And hot periods are also associated with the greater formation of ozone and other air pollutants that exacerbate respiratory illnesses such as asthma and emphysema. Electricity generation for air conditioning peaks on hot summer days. (more…)

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