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Showing posts with the label nasa

Cloud feedback regulating the “pool of inhibited cloudiness”

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Our latest paper on the "Role of cloud feedback in regulating the “pool of inhibited cloudiness” over the Bay of Bengal" published in Springer Nature's  Meteorology and Atmospheric Physics . https://goo.gl/bNdLFg Read & Share Full Article here: http://rdcu.be/wOmz Anish Kumar M. Nair,  T. N. Rao and  K. Rajeev   Reference .bib   @Article{nair2017,   author   = {Nair, Anish Kumar M. and Rao, T. Narayana and Rajeev, K.},   title    = {Role of cloud feedback in regulating the “pool of inhibited cloudiness” over the Bay of Bengal},   journal  = {Meteorology and Atmospheric Physics},   year     = {2017},   pages    = {1--12},   month    = {10},   issn     = {0177-7971},   abstract = {Cloud-circulation feedback by latent heating (LH) is a major contributor for driving atmospheric circulation. This study exami...

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

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

Global warming likely to be in the higher side

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Climate model projections that show a greater rise in global temperature are likely to prove more accurate than those showing a lesser rise. The study was published in the journal - Science. National Center for Atmospheric Research scientists John Fasullo and Kevin Trenberth analyzed how well 16 leading sophisticated climate models reproduce observed relative humidity in Earth's tropics and subtropics. They used observations from two NASA satellite instruments - the Atmospheric Infrared Sounder (AIRS) instrument on NASA's Aqua spacecraft and the Clouds and Earth's Radiant Energy System (CERES) . Climate model projections showing a greater rise in global temperature are likely to prove more accurate than those showing a lesser rise, according to them. Read in detail:  https://www2.ucar.edu/atmosnews/news/8264/future-warming-likely-be-high-side-climate-projections-analysis-finds http://www.nasa.gov/topics/earth/features/earth20121108.html

Contrail - spreading.

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Have a look at these images, captured 2 hrs apart by MODIS of TERRA & AQUA. We can clearly decipher the transition of contrail to contrail cirrus clouds....... Increasing air pollution by planes is definitely pointing towards increase the in Longwave radiative forcing and thereby increasing the global warming potential.... Read more:  http://earthobservatory.nasa.gov/IOTD/view.php?id=78154 Image credit:  Jeff Schmaltz,  LANCE MODIS Rapid Response Team,  Goddard Space Flight Center. Caption by Adam Voiland., NASA earth observatory

La Nina ends.

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La-Nina ended...... in April 2012. Pacific is in Neutral conditions....... See this animation......... Read More: http://earthobservatory.nasa.gov/IOTD/view.php?id=77828&src=youtube Animation CLICK HERE Courtesy: Nasa Earth Observatory

Precise neasurement of the universe

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Physicists on the Baryon Oscillation Spectroscopic Survey (BOSS)  have announced the first results  from their collaboration, revealing  the most precise measurements  ever made of the large-scale structure of the universe between five to seven billion years ago. They achieved this by observing the primordial sound waves that propagated through the cosmic medium a mere 30,000 years after the Big Bang. Read in detaill:  Most Precise Measurement of Scale of the Universe : Discovery News http://news.discovery.com/space/whos-the-boss-most-accurate-measurement-of-scale-of-the-universe-120406.html

Hubble Telescope see globular cluster of Messier 9

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The Hubble Space Telescope has produced the most detailed image so far of Messier 9, a globular star cluster located close to the center of the galaxy. Beautiful glittering jewels....! Click on the Image or the following link to read more. http://www.nasa.gov/multimedia/imagegallery/image_feature_2204.html Credit: NASA and ESA

Nasa to release TMA in 5 sounding rockets to study Jet Stream

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Nasa is gearing up to have 5 consecutive launches of sounding rockets which would releasr Tri-Methyl-Aluminum higher in the sky which would be acting like tracers in the Jet Stream. It would be tracked by the ground based cameras. A similar experiment was done by ISRO in Jan 2010 during the annular solar eclipse.   Read more: http://www.nasa.gov/mission_pages/sunearth/missions/atrex-nightlight.html

Clouds Descending .....?

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Earth’s clouds descended a little — about one percent on average — during last decade, finds a new NASA-funded university study based on NASA satellite data.  The results have potential implications for future global climate. Decreasing global cloud heights suggest negative feedback over the last decade Data from NASA's MISR instrument on NASA's Terra spacecraft show that global average cloud height declined by about 1 percent over the decade from 2000 to 2010, or around 100 to 130 feet (30 to 40 meters). (Image credit: University of Auckland/NASA JPL-Caltech) The study was recently published in GRL. Global cloud height fluctuations measured by MISR on Terra from 2000 to 2010 Roger Davies & Matthew Molloy http://www.agu.org/pubs/crossref/2012/2011GL050506.shtml Read Reports: http://www.popsci.com/science/article/2012-02/earths-clouds-are-sinking-and-could-help-cool-planet http://www.clarksvilleonline.com/2012/02/22/nasa-satellite-finds-earths-clouds-are...

Global Tree Height prepared.

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NASA produces Global map of forest height using ICESat. The map will help scientists better understand the role forests play in climate change and how their heights influence wildlife habitats within them, while also helping them quantify the carbon stored in Earth's vegetation. Click on the image to Zoom The map, available at http://lidarradar.jpl.nasa.gov, depicts the highest points in the forest canopy. Its spatial resolution is 0.6 miles (1 kilometer). Courtesy:  http://www.nasa.gov/topics/earth/features/forest20120217.html

mystery of Earth's 'missing energy' -solved..?

An apparent inconsistency has been diagnosed between interannual variations in the net radiation imbalance inferred from satellite measurements and upper-ocean heating rate from in situ measurements, and this inconsistency has been interpreted as ‘missing energy’. Where was it going? Now Scientists come up with an answer..... "Missing Energy" is in the Ocean  "Our data show that Earth has been accumulating heat in the ocean at a rate of half a watt per square meter (10.8 square feet), with no sign of a decline," Loeb said. "This extra energy will eventually find its way back into the atmosphere and increase temperatures on Earth." Read more: http://www.jpl.nasa.gov/news/news.cfm?release=2012-029 http://www.dailymail.co.uk/sciencetech/article-2093947/Nasa-solves-mystery-Earths-missing-energy--going-sea-says-space-agency.html?ito=feeds-newsxml Paper:  http://www.nature.com/ngeo/journal/vaop/ncurrent/full/ngeo1375.html#/access doi:10.1038/ngeo...

2011 Ninth-Warmest Year on Record

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The global average surface temperature in 2011 was the ninth warmest since 1880, according to NASA scientists. Observe an updated analysis that shows temperatures around the globe in 2011 compared to the average global temperature from the mid-20th century. http://www.nasa.gov/topics/earth/features/2011-temps.html  The average temperature around the globe in 2011 was 0.92 degrees F (0.51 C) warmer than the mid-20th century baseline. "We know the planet is absorbing more energy than it is emitting," said GISS Director James E. Hansen. "So we are continuing to see a trend toward higher temperatures. Even with the cooling effects of a strong La Niña influence and low solar activity for the past several years, 2011 was one of the 10 warmest years on record." Animation can be seen here, http://www.nasa.gov/mp4/616923main_GISStemperature2011_withColorbar.mp4 Understand  More: http://www.nasa.gov/topics/earth/features/2011-temps.html# http://data.giss.nasa.go...

Greenland ICE becoming DARKER ....?

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The bright surface of the Greenland Ice Sheet reflected well over half of the sunlight that fell on it. This reflectiveness helped keep the ice sheet stable. In the past decade, however, satellites have observed a decrease in Greenland’s reflectiveness. This darker surface now absorbs more sunlight, which accelerates melting.  difference between the amount of sunlight Greenland reflected in the summer of 2011 versus the average percent it reflected between 2000 to 2006. Warmer, lower-elevation areas of the ice sheet have darkened more than the colder, higher-altitude interior. Each summer, winter snow retreats from the edge of the ice sheet. Dark pools of melt water form on the surface of the ice, and windblown dust and other particles also collect near the surface, making it even less reflective. Jason Box of Ohio State University, who analyzed the reflectiveness data propose that ice itself undergone change in shape and structure... Read more here :  http:/...

Clouds on Venus are made concentrated sulfuric acid

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 Clouds on Venus are made concentrated sulfuric acid ...! not Water as in earth's atmosphere.... Venus experienced tremendous volcanic activity, flooding the surface with new lava and filling the atmosphere with greenhouse gases, causing a runaway greenhouse effect...  Image Credit: NASA/JPL-Caltech Read more: http://fettss.arc.nasa.gov/collection/details/venus-globe-1/

Predicting South Asian Floods..!

A new Project Aims to Predict South Asian Floods Are our Glaciers melting .... faster ....??? How it affects the nearby lakes and rivers flow and will it cause floods...? A new effort, dubbed HIMLA and led by Molly Brown of NASA’s Goddard Space Flight Center, aims to change this by harnessing state-of-the-art, satellite-based monitoring and modeling techniques. Scientists will feed data from satellite instruments such as MODIS and ASTER into a hydrological model that will produce daily snow/water equivalence maps that will feed into other hydrological models to determine how much freshwater flows into the region’s rivers from snow and glaciers.  The ultimate goal: an early warning system for flood prediction.... Read more from NASA's blog:  http://blogs.nasa.gov/cm/blog/whatonearth/posts/post_1323195383980.html

High Resolution Global Topographic Map of Moon

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LRO Camera Team Releases High Resolution Global Topographic Map of Moon. click on the image to go to the official website and high resolution image. Source: NASA-LRO http://www.nasa.gov/mission_pages/LRO/news/lro-topo.html

first images of the Asteroid which came close to earth

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First images of the Asteroid which came close to earth has been released... You can watch the video Team of astronomers decided to animate an entire sequence of their high-resolution radar images of YU55 to make a short movie clip from the data from  Deep Space Network antenna in Goldstone, California. you can watch it http://www.youtube.com/watch?v=cIwX0Qeid9o&feature=colike Courtesy: Nasa You can download the first images video http://www.nasa.gov/multimedia/videogallery/index.html?media_id=119737731