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Showing posts from 2013

Satellite Images - Easy to interpret

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Satellite images are are rich with useful and interesting information. It is not difficult to interpret them... here are some tips and stratergies....    They can show us how much a city has changed, how well our crops are growing, where a fire is burning, or when a storm is coming.  Here is a practical approach as given by Nasa Earth Observatory. Look for a scale Look for patterns, shapes, and textures Define the colors (including shadows) Find north Consider your prior knowledge Read more.... Check this link..... http://earthobservatory.nasa.gov/Features/ColorImage/?src=eorss-features Courtesy: Nasa Earth Observatory

Antarctic Sea Ice Growing ?

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Every year during winter time (Aug-Sep) , extend of Antarctic sea ice  increases. But this year...... it has reached record largest extend.... Reports NASA. Interesting .....!  Isn't it....? Read the following graph to compare the changes in sea ice extend. Read More: Antarctic Sea Ice Reaches New Maximum Extent Why should it grow....? It's an interesting field of research....! There are few hypothesis... Read More http://theconversation.com/why-is-antarctic-sea-ice-growing-19605  Courtesy: NASA earth observatory

Warmest Decade

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Temperature data from four international science institutions. All show rapid warming in the past few decades and that the last decade has been the warmest on record. Courtesy:Nasa Global CLimate change http://climate.nasa.gov/scientific-consensus

El Nino activity in 2oth century and global warming

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High El Nino -Southern Oscillation (ENSO) activity in the late 20th century is a footprint of global warming says a recent study. An international team of scientists spearheaded by Jinbao Li and Shang-Ping Xie, while working at the International Pacific Research Center, University of Hawaii at Manoa, has compiled 2,222 tree-ring chronologies of the past seven centuries from both the tropics and mid-latitudes in both hemispheres. Their work is published in the June 30, 2013 online issue of Nature Climate Change . Li, J., S.-P. Xie, E. R. Cook, M. Morales, D. Christie, N. Johnson, F. Chen, R. D'Arrigo, A. Fowler, X. Gou, and K. Fang (2013): El Niño modulations over the past seven centuries. Nature Climate Change . http://dx.doi.org/10.1038/nclimate1936 Caption: This graph shows El Niño variability derived from tree rings (blue) and instrumental measurements (red). The dashed lines indicate boundary for natural variability. Recent El Niño behavior is largely beyo

Global warming and Precipitation

Global warming from greenhouse gases affects rainfall patterns in the world differently than that from solar heating, according to a study. The scientists, led by Jian Liu (Chinese Academy of Sciences) and Bin Wang (International Pacific Research Center, University of Hawaii at Manoa), showed that global rainfall has increased less over the present-day warming period than during the Medieval Warm Period, even though temperatures are higher today than they were then. As a result of global warming, precipitation is likely to increase in high latitudes and the tropics and to decrease in already dry subtropical regions. Read More http://phys.org/news/2013-01-greenhouse-gases-solar-complexity-global.html http://www.nature.com/nature/journal/v493/n7434/full/nature11784.html doi:10.1038/nature11784

Global Warming Trends ... alarming

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2012 was the ninth warmest year since 1880. The map at the top depicts temperature anomalies, or changes, by region in 2012; it does not show absolute temperature. Reds and blues show how much warmer or cooler each area was in 2012 compared to an averaged base period from 1951–1980. For more explanation of how the analysis works, read  World of Change: Global Temperatures. The average temperature in 2012 was about 14.6 degrees Celsius (58.3 degrees Fahrenheit), which is 0.55°C (1.0°F) warmer than the mid-20th century base period. The average global temperature has increased 0.8°C (1.4°F) since 1880, and most of that change has occurred in the past four decades. Read more:  http://earthobservatory.nasa.gov/IOTD/view.php?id=80167&src=eoa-iotd