Tag: tree rings
event: Counting the Rings
by Greg on Sep.20, 2009, under Science Event
| September 21, 2009 | ||
| 6:00 pm | to | 9:00 pm |
It has been four years since I have read Elizabeth Kolbert’s sprawling long essay on climate change? FOUR YEARS? I have to reread it and see if it anything has changed in that time period. If you feel like reading journalism at its best, someone reposted it: The Climate of Man 1,2,&3. This event is related to the central idea of that essay: that the demise of civilizations throughout human history have been the result of some catastrophic climate event like drought:
Environmental Lecture
Did you know that tree rings can indicate more than the number of years a tree’s been alive? The width of each ring refers to how much the tree grew that year, so scientists are able to measure the ring widths to determine when historical droughts took place. (continue reading…)
Event: Tree Rings and Megadrought
by Lauren on Sep.17, 2009, under Science Event, Science Life
| September 21, 2009 | ||
| 6:00 pm | to | 9:00 pm |
The explorers club presents a lecture by Dr. Brendon Buckley about big droughts in Southeast Asia during the 1300 and 1400s.
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Still want to set the world on fire
Science, media, art, movies, politics, and what else I find interesting tweeting and reading on the internet.
Nasa's Image of the Day
Little Galaxy With a Tail
This infrared portrait of the Small Magellanic Cloud, taken by NASA's Spitzer Space Telescope, reveals stars and dust in this galaxy as never seen before. T The image shows the main body of the Small Magellanic Cloud, which is comprised of the "bar" and "wing" on the left and the "tail" extending to the right. The bar contains both old stars (in blue) and young stars lighting up their natal dust (green/red). The wing mainly contains young stars. The tail contains only gas, dust and newly formed stars. Spitzer data has confirmed that the tail region was recently torn off the main body of the galaxy. Two of the tail clusters, which are still embedded in their birth clouds, can be seen as red dots. The data in this image are being used by astronomers to study the lifecycle of dust in the entire galaxy: from the formation in stellar atmospheres, to the reservoir containing the present day interstellar medium, and the dust consumed in forming new stars. The dust being formed in old, evolved stars (blue stars with a red tinge) is measured using mid-infrared wavelengths. The present day interstellar dust is weighed by measuring the intensity and color of emission at longer infrared wavelengths. The rate at which the raw material is being consumed is determined by studying ionized gas regions and the younger stars (yellow/red extended regions). The Small Magellanic Cloud, and its companion galaxy the Large Magellanic Cloud, are the two galaxies where this type of study is possible. Image Credit: NASA/JPL-Caltech/STScI
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