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The development of the ash plume from Iceland's Eyjafjallajoekull volcano between 17-20 April is tracked in this series of Envisat images.
On 17 and 19 April, the brown-coloured ash plume is visible travelling in a roughly southeasterly direction over the Atlantic Ocean by the prevailing western air current. By 20 April, much less ash is visible spewing from the volcano.
Native Americans used smoke signals to indicate danger, and a white plume is sent up by the Vatican when a new Pope is chosen. Now, a new research project by Tel Aviv University researchers and their colleagues shows that where there's "smoke" there may be significant consequences for local weather patterns, rainfall and thunderstorms.
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The changing chemistry of the world's oceans is a growing global problem, says the summary of a congressionally requested study by the National Research Council, which further adds that unless man-made carbon dioxide (CO2) emissions are substantially curbed, or atmospheric CO2 is controlled by some other means, the ocean will continue to become more acidic. The long-term consequences of ocean acidification on marine life are unknown
NIH-led interagency group identifies research needs to study climate change and human health impacts
A report released today by a federal working group highlights 11 key categories of diseases and other health consequences that are occurring or will occur due to climate change. The report, A Human Health Perspective on Climate Change, provides a starting point for coordination of federal research to better understand climate's impact on human health. The recommendations of the working group include research to identify who will be most vulnerable, and what efforts will be most beneficial.
Supercooling, a state where liquids do not solidify even below their normal freezing point, still puzzles scientists today. A good example of this phenomenon is found everyday in meteorology: clouds in high altitude are an accumulation of supercooled droplets of water below their freezing point. Scientists from the Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA), the Centre National de Recherche Scientifique (CNRS) and the ESRF have found an experimental explanation of the phenomenon of supercooling. Their research is published today in Nature.
CORVALLIS, Ore. – A new study concludes that the future effects of global warming could be significantly changed over very small distances by local air movements in complex or mountainous terrain - perhaps doubling or even tripling the temperature increases in some situations.
In an article to be published in the International Journal of Climatology, researchers from Oregon State University used the unique historical data provided by Oregon's H.J. Andrews Experimental Forest to study potential variations in temperature caused by steep hills and valleys.
A new study identifies cattle feed as a possible culprit in the long-standing mystery of why California's San Joaquin Valley, only a moderately-populated agricultural region, has higher levels of ozone (one of the main ingredients in smog) than many densely-populated cities. The report explains how fermented cattle feed works in forming ozone and is published in Environmental Science & Technology.
A Virginia Tech biologist proposes to use a physics strategy called resonant activation to nudge dormant bacteria cells into a stage where they will be sensitive to antibiotics.
In medicine, resonance means the sound the doctor hears when he or she thumps your chest. In physics, resonance is a periodic force or an oscillation whose frequency is close to that of a natural system's frequency. Sound waves are an example of a natural system that can be altered with resonant activation.
The results of a genetic study on migratory birds supports the hypothesis that in the case of a continued global warming, and within only a few generations, migratory birds will (subject to strong selection and microevolution, they claim) at first begin to fly shorter distances and at a later stage, stop migrating, and will thus become so-called "residents".