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Profile Ron Crouch
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Message 47031 - Posted: 13 Sep 2013, 2:07:03 UTC

If you haven't guessed, I like the subject of ice.

Warm Ocean Rapidly Melting Antarctic Ice Shelf from Below

In a paper published in the journal Science on Sept. 13, the team describes how at one of their study sites, halfway down the ice shelf, the melt rate was as high as 2.36 inches (6 centimeters) per day.

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Message 47032 - Posted: 13 Sep 2013, 2:19:06 UTC
Last modified: 13 Sep 2013, 2:20:34 UTC

A century of human impact on Arctic climate indicated by new models and historic aerosol data contained in ice cores

The authors attribute warming from 1900-1939 to rapidly rising black carbon emissions, diminishing influence of the Santa Maria volcanic eruption in 1902, and warming North Atlantic sea surface temperatures. Cooling from 1939 to 1970 is attributed to cooling from anthropogenic sulfate aerosol emissions the Agung volcanic eruption in 1963, and falling North Atlantic surface temperatures.
More recently, the authors attribute warming from 1970 to present to increased anthropogenic greenhouse gas emissions, with a smaller contribution from warming North Atlantic sea surface temperatures.


Access to the study is free.
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Message 47033 - Posted: 13 Sep 2013, 2:32:19 UTC

Unprecedented Rate and Scale of Ocean Acidification Found in the Arctic

The new research shows that acidification in surface waters of the Arctic Ocean is rapidly expanding into areas that were previously isolated from contact with the atmosphere due to the former widespread ice cover.

"A remarkable 20 percent of the Canadian Basin has become more corrosive to carbonate minerals in an unprecedented short period of time. Nowhere on Earth have we documented such large scale, rapid ocean acidification" according to lead researcher and ocean acidification project chief, U.S. Geological Survey oceanographer Lisa Robbins.

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Message 47136 - Posted: 20 Sep 2013, 21:25:16 UTC

Arctic sea ice reaches lowest extent for 2013

Far from record setting, but still well below average.
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Message 47165 - Posted: 25 Sep 2013, 18:12:25 UTC
Last modified: 25 Sep 2013, 18:25:12 UTC

Well this is only indirectly related to climate change as is intended here, but it could help to spell a greener future.

One day, we may fill the tank with fungi fuel!

Or perhaps keep us all fed. After all the projections are that we will hit 9 billion souls by 2045.

The ground beneath our feet
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Message 47166 - Posted: 25 Sep 2013, 18:38:33 UTC

Global Warming to Spawn More Severe U.S. Thunderstorms: Study

Why Is It Important?


The simulations all agreed that continued global warming will lead to increases in storm days over large areas of the eastern United States in the spring, winter, and autumn.


The changes mean that for springtime alone, severe thunderstorms could increase by as much as 40 percent over the eastern U.S. by the end of the century, Diffenbaugh said.


What Does This Mean?


Severe thunderstorms, which are often associated with heavy rainfall, hail, and even tornadoes, are one of the primary causes of major economic losses in the United States.


In 2012, seven of the country's $11 billion weather disasters were caused by severe thunderstorms and tornadoes.


"Sadly, we have many examples of cases where a single storm has had disastrous impact," Diffenbaugh said in a statement. "So a 25 or 30 percent increase in the annual occurrence represents a substantial increase in the overall risk."

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Message 47167 - Posted: 25 Sep 2013, 18:47:15 UTC - in response to Message 47166.  

If that's the case, I doubt the population will hit those projections. The U.S. and Canada feed a lot of the worlds population and severe weather would certainly impact crops, especially from hail damage. Ya think?
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Message 47168 - Posted: 25 Sep 2013, 19:04:20 UTC

Unfortunately; "only the shadow knows".
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Message 47182 - Posted: 27 Sep 2013, 8:22:14 UTC

Oh dear. The planet is getting warmer after all.
Who'd of thought?

IPCC climate report: Global warming now 'unequivocal'

On the ground, in the air, in the oceans, global warming is "unequivocal", according to a landmark report on the Earth's climate.

The report by the UN's climate panel details the physical evidence behind climate change.

Scientists are 95% certain that humans have been the "dominant cause" of the rise in temperatures since the 1950s.


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Message 47184 - Posted: 27 Sep 2013, 15:45:17 UTC

I'm glad I'm not a scientist. I've been under the assumption that anthropogenic global warming is a 100% certainty.

What's that phrase? Oh yes; "Prepare for the worst......."
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Message 47185 - Posted: 27 Sep 2013, 15:58:52 UTC
Last modified: 27 Sep 2013, 16:48:11 UTC

I think the title speaks for itself.

Climate Models Show Potential 21st Century Temperature, Precipitation Changes

-------------------------------

Any readers who work with Atomic Weights please take note of coming changes to 19 chemical elements in 2014 as announced here.
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Les Bayliss
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Message 47236 - Posted: 5 Oct 2013, 3:18:17 UTC

Mystery 13th Century eruption traced to Lombok, Indonesia

Scientists think they have found the volcano responsible for a huge eruption that occurred in the 13th Century.

The mystery event in 1257 was so large its chemical signature is recorded in the ice of both the Arctic and the Antarctic.

European medieval texts talk of a sudden cooling of the climate, and of failed harvests.

In the PNAS journal, an international team points the finger at the Samalas Volcano on Lombok Island, Indonesia.

Little remains of the original mountain structure - just a huge crater lake.



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Message 47266 - Posted: 10 Oct 2013, 5:56:37 UTC

OECD: 'No bailout' for climate threat

Governments forced to rescue the world's banking system are being warned there will be no bailout if there is a crisis in the Earth's climate system.

That is the view of the head of the Organisation for Economic Co-operation and Development (OECD).

.....

Mr Gurria is due to address the topic of climate change, investment and energy policies in a London lecture co-organised with the London School of Economics and the Climate Markets & Investors Association (CMIA)

The talk coincides with a report in The Independent newspaper that claims UK Chancellor George Osborne is about to reject the recommendations of government advisers by slowing the drive to tackle global warming.


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Message 47325 - Posted: 14 Oct 2013, 9:25:42 UTC

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Message 47454 - Posted: 2 Nov 2013, 7:45:50 UTC

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Message 47489 - Posted: 7 Nov 2013, 9:07:07 UTC
Last modified: 7 Nov 2013, 9:07:28 UTC

If all the ice melted.
National Geographic Magazine:
http://ngm.nationalgeographic.com/2013/09/rising-seas/if-ice-melted-map

The Times, referring to the NGM article:
http://www.thetimes.co.uk/tto/environment/article3915060.ece
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Message 47490 - Posted: 7 Nov 2013, 10:05:01 UTC - in response to Message 47489.  

Worth going to the interactive map, then click on the button which puts current cities in. Seems like most of Europe's capitals would be under water.
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Profile Byron Leigh Hatch @ team Carl Sagan
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Message 47493 - Posted: 7 Nov 2013, 17:42:52 UTC

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Message 48132 - Posted: 9 Feb 2014, 22:54:25 UTC

Global warming: Australian scientists find explanation for pause in rising temperatures

Scientists have come up with an explanation for the pause in global warming, which has long been a point of contention raised by climate change sceptics.

Over the past 15 years the rate of global warming has slowed - and more recently almost stalled.

Professor England led a team of researchers from around the world that has come up with an explanation for why the oceans soak up the heat.

Their research, published in the journal Nature Climate Change, has found the answer lies in stronger than usual trade winds whipping across the Pacific Ocean.

It was found the winds were churning the Pacific like a washing machine, bringing the deeper colder water to the surface and pushing the warmer water below.

"The phase we're in of accelerated trade winds particularly lasts a couple of decades," Professor England said.

"We're about 12 to 13 years in to the most accelerated part of the wind field.

"It's important to point out there's a cycle we expect to reverse and when they do reverse back to their normal levels we'd expect global warming to kick in and start to rise."


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Profile Byron Leigh Hatch @ team Carl Sagan
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Message 48167 - Posted: 14 Feb 2014, 5:18:40 UTC




Very interesting and good post Les thank you,

here is some of the latest and very interesting news from NASA:

NASA's Climate Change Newsletter:

http://climate.nasa.gov/news



Scholarly articles for NASA's Climate Change Newsletter





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