Earth Science # Science

Glacial Landforms in Relation to the Himalayas

Glaciers are represented by the flowing movement of a thick mass of ice and form as a result of the compaction or recrystallization of snow. Glaciers occur in areas whose climate favours the seasonal accumulation of snow in greater volumes than seasonal ablation. Here the seasonal accumulation of snow outpaces seasonal ablation that occurs due to loss of snow from melting, calving, evaporation and/or wind erosion. Glaciers can thus be found in Polar and Alpine Regions where temperatures can be substantially...

Earth Science # Science # Technology

The Glaciers of the Himalaya

In the central and eastern Himalayas, a general negative mass balance has been reported, whereas in the glaciers of the Karakoram Range in the northwestern Himalaya, heterogeneous behaviour is depicted.

Earth Science

Rare Super Blue Blood Moon Visible on January 31st 2018

The National Aeronautics and Space Administration’s (NASA’s) prediction is correct, and we will be able see a super blue blood moon in the night skies today on January 31st, 2018. In this event the lunar eclipse with a reddish moon, the super moon (a closer and larger moon) and the blue moon (two full moons within a month) could all be visible simultaneously. Termed as a super blue blood moon, this sort of lunar eclipse is an extremely rare event and last occurred in December, 1982. It is expected...

Earth Science

Understanding the Classification of the Biomes of the World

No two ecosystems in locations around Earth can be said to have the exact assortment of species forming habitats in them. However, terrestrial ecosystems and biological communities of organisms can be classified into categories on the basis of climatic features and the predominant plant forms appearing in these locations. On the basis of these categories, the different types of biomes of the world are classified. The presence of similar vegetation or the complete absence of it in similar climatic...

Earth Science

Antarctic Subglacial Lakes Might Offer Unique Surprises

Radar measurements of subterranean Antarctica have revealed that a massive network of rivers, streams and lakes exist beneath the ice sheet in Antarctica. These regions are host to a number of Antarctic aquatic environments beneath the Antarctic ice sheet. Subglacial Lakes in Antarctica The radar measurements used include both surface and airborne radar measurements that have managed to identify greater than 400 Antarctic subglacial lakes (Seigert et al., 2016). The largest of these is Lake...

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Lake Vostok of Antarctica | What does it really reveal

Covering a total area of about 10,000 sq km, Lake Vostok in Antarctica is one of the largest sub-glacial lakes in the world. Lake Vostok in Antarctica is buried under greater than about 3.7 km of ice and is located near the Vostok research station run by Russia. Lake Vostok in Antarctica was once a large surface lake in eastern Antarctica that is now covered by a layer of ice about 3.7 km deep. Covered by a layer of ice for a millennia, Lake Vostok in Antarctica provides one of Earth’s most...

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Plate tectonics | Quick recycling of Earth’s crust in less than 500 million years

Plate tectonics and the mantle You may feel that the grounds you play football on every evening is unchanging as ever. However, nothing can be further from the truth. The earth's crust too undergoes a cycle of birth and death that have changed the way our planet looks over millions of years. In 2011, scientists found evidence that this cycle was quicker than thought: 500 million years instead of 2 billion. The tectonic plates that constitute the crust are pushing, pulling or brushing past one another,...

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Total Solar Eclipse of 2017 and New Learnings for Science

In what is being called the 2017 Great American Eclipse, about all of North America was swathed in different shades of darkness on August 21, 2017 in the event of a total solar eclipse (Fig 1). The total solar eclipse was viewed by people in North America, and a partial eclipse was visible to people in parts of South America, Europe and Africa. The path of totality, or the line sketched by the 2017 Great American Eclipse covering narrow regions in total darkness passed through areas of 14 American...

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Ten Most Saline Locations on Earth

The most saline locations on Earth contain salt, or sodium chloride, and also other minerals and contain these in much greater quantities than the ocean. The following are the locations in the world with the greatest concentration of salt, with salinity levels that in many cases are inimical for life to survive in these places. Don Juan Pond Among the most saline locations on Earth, in terms of natural water bodies, the most saline is the Don Juan Pond in Antarctica. The pond has a salinity...

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Pink Rainbows Appear in the United Kingdom

A pink rainbow was observed from parts of Western England on August 7, 2017 which is a rare occurrence. Pink rainbows occur as optical effects depending on how we view phenomena and is caused by the refraction of sunlight from a reddish evening sun by droplets of water in the Earth’s atmosphere. In the evening the angle of sunlight reaching an area on Earth makes it pass through a greater depth of atmosphere than in the daytime. In such a circumstance, colours occupying shorter wavelengths...