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Our collaborative research article Sensitivity of climate models in relation to the “pool of inhibited cloudiness” over South of the Bay of Bengal  is published in the International Journal of Climatology recently. [ click to view the paper ] / [ click here to download the paper ] It is on evaluation of CMIP5 models and suites of CFSv2 in capturing a region known as "Pool of inhibited cloudiness" [ click to view the base paper ] over the southwest Bay of Bengal region. This region was actually identified based on satellite observation by Nair et al. (2011)   However, the fidelity of climate models were not evaluated to capture this region of suppressed convection (surrounded by region of deep convection). Climate models (cmip5 and CFSv2 default) shows difficulties in simulating the region. However, improved cloud physics seem to have played an important role in capturing the complex process Present Paper: Roy, K., Mukhopadhyay, P., Mu...

Our paper published in the Atmospheric Science Letters on different types of clouds during monsoon phases. The study was mainly carried out using Ka-band doppler weather radar of IITM. https://rmets.onlinelibrary.wiley.com/doi/abs/10.1002/asl.847 Chakravarty, K., Pokhrel, S., Kalshetti, M., Nair, A. K. M., Kalapureddy, M. C. R., Deshpande, S. M., … Goswami, B. N. (2018). Unraveling of cloud types during phases of monsoon intra-seasonal oscillations by a Ka-band Doppler weather radar. Atmospheric Science Letters , 19 (9), e847. http://doi.org/10.1002/asl.847 https://doi.org/10.1002/asl.847

Our article "Enhanced daytime occurrence of clouds in the tropical upper troposphere over land and ocean" published in Atmospheric Research  Gupta, A. K., Rajeev, K., Sijikumar, S., & Nair, A. K. M. (2018). Enhanced daytime occurrence of clouds in the tropical upper troposphere over land and ocean. Atmospheric Research , 201 (October 2017), 133–143. http://doi.org/10.1016/j.atmosres.2017.10.018 https://www.sciencedirect.com/science/article/pii/S0169809517302235

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...

Congrats Dr. Suresh Babu for bagging the prestigious Shanthi Swarup Bhatnagar Prize 2017. CLICK HERE  Proud of you...!!! Wishing you and team more success !!

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

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

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 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

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

Greenland is an immense, glittering expanse of snow and ice. But in recent summers, satellites have been observing less “glitter” from the Northern Hemisphere’s largest ice expanse due to surface melt and other changes caused by warmer temperatures. The summer of 2012 found Greenland darker than it has been since ice-sheet-wide observations began in 2000. The darkest areas occurred around the perimeter of the island—the lowest elevations, where melting is most significant—but virtually the entire ice sheet showed below-average reflectivity. Courtesy: Climate Watch Magazine by NOAA http://www.climatewatch.noaa.gov/article/2012/less-glitter-greenland-ice-sheet-continued-to-darken-in-summer-2012 Map by NOAA Climate.gov team, based on NASA MODIS albedo data provided by Jason Box, The Ohio State University. Inset image is from NASA’s Terra satellite, courtesy the  LANCE MODIS Rapid Response Project.  Reviewed by Jason Box.

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

There are many proposals to reduce the climatic impact and change because of the Global Warming. Some of them tries to address the causative mechanism while some treats symptoms..... Geo-Engineering is d eliberate large-scale engineering and manipulation of the planetary environment to combat or counteract man made changes in atmosphere. Have a look at the three proposals to reduce increasing temperature. Click on the image of use the link below for a recent article in BBC. More details:  http://news.bbc.co.uk/2/hi/technology/8338853.stm

Clouds and aerosol particles have bedevilled climate modellers for decades. Now researchers are starting to gain the upper hand. Researchers say they are beginning to turn a corner in simulating clouds and aerosols. In recent months, climate scientists have started rolling out initial results from the newest generation of models, which represent atmospheric chemistry and microphysics in much more sophisticated ways than previous incarnations. These models allow clouds and aerosols to evolve as they interact with each other and respond to factors such as temperature, relative humidity and air currents.  Read more : http://www.nature.com/news/climate-forecasting-a-break-in-the-clouds-1.10593 Nature International weekly journal of science Go Advanced search

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

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...

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...

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:/...

Global warming caused by greenhouse gases delays natural patterns of glaciation suggests a study co-authored by a University of Florida researcher and published online Jan. 8 in Nature Geoscience. The Earth's current warm period that began about 11,000 years ago should give way to another ice age within about 1,500 years, according to accepted astronomical models. However, current levels of carbon dioxide are trapping too much heat in the atmosphere to allow the Earth to cool as it has in its prehistoric past in response to changes in Earth's orbital pattern. data indicate that the next ice age will likely be delayed by tens of thousands of years. Good news ...?                 NO! Ice sheets like those in western Antarctica are already destabilized by global warming, they eventually slough off and become a part of the ocean's volume, it will have a dramatic effect on sea level. Read more here :  http://www.physorg.com/news/...

Global warming forces Birds to higher altitudes and not necessarily to higher latitudes.... finds a study....... birds aren't migrating as rapidly as scientists previously anticipated, based on recorded temperature increases. "However, our understanding of the response of tropical birds to warming is still poor," said German Forero-Medina, a Ph.D. student at Duke's Nicholas School who is lead author of the new study. "Moving to the north doesn't help them, because tropical temperatures do not change very much with latitude. So moving up to higher elevations is the only way to go, but there are few historical data that can serve as baselines for comparison over time." Read more: http://www.physorg.com/news/2011-12-climate-tropical-birds-higher-elevations.html  "Elevational Ranges of Birds on a Tropical Montane Gradient Lag Behind Warming Temperatures" German Forero-Medina, John Terborgh, S. Jacob Socolar & Stuart L. Pimm. PLoS ONE,...