Merry Christmas from...
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Eddie was feeling no pain. |
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My Year in Review
Don't miss the train lay out at the Morton Arboretum. Ends 1/6/08 |
This rare wood pecker visited my feeder yesterday. |
I had a few cold ones before the game. Teachers are always fun when vacation begins. |
My Naperville Students are watching this section of the DuPage River for Freeze up. Click here for more Freeze Up Data |
The Arboretum's Lake Marmo froze up on December 1, 2007 |
We measured the surface temperature and the debt of the snow. |
We watched for bud burst and measured leaves in the spring. |
We recorded the color change in the fall |
We measure the Humidity by spinning wet and dry thermometers. |
We released some Bass into Hidden Lake. |
The Ginkgo tree was covered with leaves on October 30, 2007 | 4 days later, the Ginkgo leaves were all on the ground. |
I went to Alaska in the Spring and returned there in the Fall. |
I saw glaciers melting at the fastest rate in millions of years. I saw homes sinking into permafrost that was no longer permanent. |
Permafrost and global warmingPermafrost is being significantly affected by global warming and the impact on permafrost has the potential to accelerate further the warming phenomenon. With average temperatures rising, permafrost is currently on the retreat in the Arctic regions, from northern Canada to Siberia. This is destabilising both natural features and man-made structures as the previously frozen-solid ground gradually becomes soft, damp or waterlogged. Permafrost warming is also increasing the incidence of rockfall (and rockslide) activity in mountain ranges the world over as the cementing effect of ice within soil and rock structures decreases with increasing ice temperature. According to the recent Arctic Climate Impact Assessment (ACIA) and the Global Terrestrial Network for Permafrost (GTNP), thawing permafrost is also contributing to an increasing rate of erosion in coastal areas in the Arctic region, with the result that some coastal communities are already being forced to relocate. Perhaps most importantly, Arctic permafrost is estimated to contain up to some 14% of the Earth's stored soil carbon. The annual thawing of the "active layer" allows vegetation to grow on otherwise frozen ground but residual dead vegetation does not fully decompose as is the case in other climes. This vegetation is absorbed by the active layer and frozen, slowing decay considerably. Over time significant quantities of vegetation are in fact frozen solid and their stored carbon suspended in the permafrost. Thawing would mean considerably greater decomposition of the stored vegetation and consequent release of significant quantities of carbon dioxide and particularly methane (a more potent greenhouse gas). You only hear about Carbon Dioxide, but methane is the one that could do us in much faster. There is a complex equation to be considered, however: the release of carbon would also stimulate additional plant growth. The concern of many scientists is that although some of the carbon released would be absorbed by greater plant growth there would, nonetheless, be a net carbon increase, contributing to a dangerous vicious circle of further temperature rise and consequent carbon release.
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To E-mail the Duffer News Web master, just click here! g.lopatka@comcast.net You can e-mail History updates to Beak.
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