NIST Colloquium Series: Baked Alaska: Changing Climate - Changing Landscapes

Alaska's landscapes—ever changing in response to active physical processes—
are very sensitive indicators of climate change. In this presentation, geologist Bruce Molnia describes the post-Little Ice Age behavior of Alaskan glaciers, focusing on the continuing changes occurring within Glacier Bay National Park.

Category:

Nonprofits & Activism

Tags:

• NIST
• Bruce Molnia
• geologist
• U.S. Geological Survey
• climate change
• global warming
• glaciers
• Ice Age
• Alaska
• Glacier Bay National Park
• glaciation
• tectonics
• seismicity
• sedimentation
• isostatic rebound
• and sea level change.

[usnistgov]

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[vengencefrom1979]

current CO2 levels are at 392 ppm, within 3 years they will hit 400 ppm, a level not seen for millions of years. global warming has the potential to defrost antarctica not in centuries or even decades but years. antarctica is connected to every tectonic plate around the world. when trillons of tons of ice are removed it will rise out of the ocean by as much as five miles and crack the earths crust. this is not a doom and gloom prophesy, this is science. we are going to need a lot ot trees.

[kiwikimmyd]

Ross Ice Shelf breaking off Ross Island happening this week. Started last Tuesday, around the same time as the Chch earthquake. They're evacuating personnel off Ross Island before the winter, before the runways for the Globemasters are gone. They can see the sea through the cracks now. There was some talk about it on Radio NZ, but not being reported elsewhere. So this was interesting...to hear about the rate of velocity behind these glaciers increasing as the ice shelf goes.

[Constantia1000]

Cold is good for California sometimes things need to purify about the soil anyway. When the earths populations plunder the Earth continually it creates a negative vacuum if I could describe it like that 'Hippie style'. Californians tend to be rather natural Naturalists whom are sensitive.

[gunthaarz]

Glaciers recede and increase in size mainly because of increase in or declines in precipitation, not because of melting as far as knowledge I've been able to gather... if more of the precipitation falls as rain in spring summer autumn, than as snow, this might tell us something about long term cycles in weather patterns much more than anything substantial about the temperature.