KREUZADER (Posts tagged anthropogenic climate change)

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West Antarctic ice shelf breaking up from the inside out“ COLUMBUS, Ohio—A key glacier in Antarctica is breaking apart from the inside out, suggesting that the ocean is weakening ice on the edges of the continent.
The Pine Island Glacier, part of the...

West Antarctic ice shelf breaking up from the inside out

COLUMBUS, Ohio—A key glacier in Antarctica is breaking apart from the inside out, suggesting that the ocean is weakening ice on the edges of the continent.

The Pine Island Glacier, part of the ice shelf that bounds the West Antarctic Ice Sheet, is one of two glaciers that researchers believe are most likely to undergo rapid retreat, bringing more ice from the interior of the ice sheet to the ocean, where its melting would flood coastlines around the world.

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Originally posted by jasionszoszon

Source: news.osu.edu
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OAK RIDGE, Tenn., Oct. 12, 2016—In a new twist to waste-to-fuel technology, scientists at the Department of Energy’s Oak Ridge National Laboratory have developed an electrochemical process that uses tiny spikes of carbon and copper to turn carbon dioxide, a greenhouse gas, into ethanol. Their finding, which involves nanofabrication and catalysis science, was serendipitous.

“We discovered somewhat by accident that this material worked,” said ORNL’s Adam Rondinone, lead author of the team’s study published in ChemistrySelect. “We were trying to study the first step of a proposed reaction when we realized that the catalyst was doing the entire reaction on its own.”

The team used a catalyst made of carbon, copper and nitrogen and applied voltage to trigger a complicated chemical reaction that essentially reverses the combustion process. With the help of the nanotechnology-based catalyst which contains multiple reaction sites, the solution of carbon dioxide dissolved in water turned into ethanol with a yield of 63 percent. Typically, this type of electrochemical reaction results in a mix of several different products in small amounts.

“We’re taking carbon dioxide, a waste product of combustion, and we’re pushing that combustion reaction backwards with very high selectivity to a useful fuel,” Rondinone said. “Ethanol was a surprise – it’s extremely difficult to go straight from carbon dioxide to ethanol with a single catalyst.”

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“August 2016 was the warmest August in 136 years of modern record-keeping, according to a monthly analysis of global temperatures by scientists at NASA’s Goddard Institute for Space Studies (GISS) in New York.
Although the seasonal temperature cycle...

August 2016 was the warmest August in 136 years of modern record-keeping, according to a monthly analysis of global temperatures by scientists at NASA’s Goddard Institute for Space Studies (GISS) in New York.

Although the seasonal temperature cycle typically peaks in July, August 2016 wound up tied with July 2016 for the warmest month ever recorded. August 2016’s temperature was 0.16 degrees Celsius warmer than the previous warmest August in 2014. Last month also was 0.98 degrees Celsius warmer than the mean August temperature from 1951-1980.

Source: data.giss.nasa.gov
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“ July 2016 was Earth’s warmest July since record keeping began in 1880, said NOAA’s National Centers for Environmental Information (NCEI) on Wednesday. In the NOAA database, July 2016 came in 0.87°C (1.15°F) warmer than the 20th-century average for...

July 2016 was Earth’s warmest July since record keeping began in 1880, said NOAA’s National Centers for Environmental Information (NCEI) on Wednesday. In the NOAA database, July 2016 came in 0.87°C (1.15°F) warmer than the 20th-century average for July, beating the previous record for July, set in 2015, by 0.06°C. NASA also reported the warmest July in its database.

Even more impressive, July 2016 was also Earth’s warmest month in recorded history in absolute terms. This is because July is the planet’s hottest month of the year overall. Land areas heat and cool more readily than the ocean surface, and most of Earth’s land area is in the Northern Hemisphere, where summer arrives in the middle of the year. The global average surface temperature is normally about 3-4°C (5-7°F) warmer in July than in January. In relative terms, February 2016 was Earth’s warmest month on record, according to NASA, since it came in at 1.32°C (2.38°F) warmer than the 20th-century average for that month. NOAA rated March 2016 as the month with the warmest anomaly on record, at 1.22°C (2.20°F). Both of these effects–relative and absolute–can be seen in Figure 1 below.

Source: wunderground.com
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congratulations everyone, we did it:

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On Saturday, NASA dropped a bombshell of a climate report. February 2016 has soared past all rivals as the warmest seasonally adjusted month in more than a century of global recordkeeping. NASA’s analysis showed that February ran 1.35°C (2.43°F) above the 1951-1980 global average for the month, as can be seen in the list of monthly anomalies going back to 1880. The previous record was set just last month, as January 2016 came in 1.14°C above the 1951-1980 average for the month. In other words, February has dispensed with this one-month-old record by a full 0.21°C (0.38°F)–an extraordinary margin to beat a monthly world temperature record by. Perhaps even more remarkable is that February 2015 crushed the previous February record–set in 1998 during the peak atmospheric influence of the 1997-98 “super” El Niño that’s comparable in strength to the current one–by a massive 0.47°C (0.85°F).

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Going back to about 500 BCE, the resulting graph of sea levels shows that they largely meandered up and down within a 10cm band. Two times show a longer-term trend: a rise of about 1mm per decade that ran from 0 to 700 CE, and a drop of 2mm per decade from 1000 CE to 1400 CE. Both of these roughly align with past temperature changes, the latter corresponding to cooling that resulted in the Little Ice Age.

But there’s nothing in the data quite like the last century, when there was an average rise of 14mm per decade. “It is extremely likely (P≥0.95),” the authors conclude, “that 20th century [global sea level] rise was faster than any preceding century since at least -800 CE.” Less than half of this rise, they estimate, would have occurred without human intervention in the climate. Although this century is still just getting started, the data currently indicates a rise of more than double last century’s average.

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NOAA calculated that the average global temperature across both land and ocean surfaces for 2015 was 0.90°C (1.62°F) above the 20th-century average of 13.9°C (57.0°F). This makes 2015 the warmest calendar year, as well as the warmest of any 12-month period, in global temperature data going back to 1880. Using a slightly different technique, NASA confirmed that 2015 was the warmest year in this 136-year period. 

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Yearly global temperature (as expressed against the 20th-century average), 1880 - 2015. Shaded red bars indicate the average for each decade. Despite a relatively flat temperature trend in the first decade of the 2000s, global warming didn’t “stop” then. Each decade since the 1960s has been warmer than the prior one.

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Earth’s surface temperature has surged high into uncharted territory, thanks to a record-strength El Niño event combined with the long-term rise in temperatures due to human-caused global warming: October 2015 was Earth’s warmest month on record by a huge margin, according to data released by NOAA’s National Centers for Environmental Information (NCEI) on Wednesday. October 2015 was the second consecutive month with a new all-time warmest month record: September 2015 previously held the record for the largest positive departure of temperature from average of any month among all 1630 months in the historical record that began in January 1880. As shown in the table below, October 2015’s 0.98°C (1.76°F) departure from the 20th Century average beat the next ten runners-up by an unusually large margin, underscoring how unusual and extreme the current surge in global temperatures is. NASA also rated October 2015 as the warmest month in the historical record by a large margin, again defined as the largest positive departure from average (note that in an absolute sense, Earth’s warmest month is July, but NOAA and NASA do not keep track of global temperature records in an absolute sense.)

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The study, co-authored by Carling Hay, a post-doctoral fellow in the Department of Earth and Planetary Sciences (EPS), and Eric Morrow, a recent PhD graduate of EPS, shows that previous estimates of global sea-level rise from 1900-1990 had been over-estimated by as much as 30 percent. The report, however, confirms previous estimates of sea-level change since 1990, suggesting that the rate of sea-level change is increasing more quickly than previously believed.
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