Geography, GS-1, Uncategorized

Difference Between a Comet, Asteroid and Meteor?

Asteroids are generally larger chunks of rock that come from the asteroid belt located between the orbits of Mars and Jupiter. Sometimes their orbits get perturbed or altered and some asteroids end up coming closer to the Sun, and therefore closer to Earth. Comets are much like asteroids, but might have a more ice, methane, ammonia, and… Continue reading Difference Between a Comet, Asteroid and Meteor?

Geography, GS-1, Uncategorized

Explained: Koppen Method of Climate Classification

The three methods of classification of climate by Koppen, Trewartha and Thornthwaite are very frequently asked in the UPSC Geography Optional Paper 1. I had made notes for such high frequency topics. This topic should be studied comparatively to remember the three methods. I will list out Koppen’s method of classification and compare Trewartha and… Continue reading Explained: Koppen Method of Climate Classification

Geography, GS-1, Uncategorized

Oceanic Deposits Calssification

The classification of oceanic deposits can be done on the basis of Source, Sediments and Location A. Source based Classification of Oceanic Deposits Terrigenous/Lithogenous (material eroded from land) Hydrogenous (e.g. Carbonite) Biogenous (Siliceous, Calcareous) Cosmogenous (e.g. meteorite) Vulcanous Inorganic precipitate (from Air) B. Sediment based Classification of Oceanic Deposits Pelagic (open sea, not close to the shore) Littoral… Continue reading Oceanic Deposits Calssification

Editorials, Geography, GS-1, Uncategorized

Bitter sweet

Indian Express Context Central and State Governments’ interference in the price mechanism of sugarcane is detrimental to the farmers. Sugarcane Sugarcane is a long duration, high water and high nutrient-demanding crop. It  is grown under wide range of climate, ranging from sub-tropical to tropical conditions. Temperatures above 50°C and below 20°C are not suitable for… Continue reading Bitter sweet

Environment, Geography, GS-1, GS-3, Uncategorized

The interlinking of rivers offers some solutions, but comes with a big load of problems

Environmental: Inbuilt in the linking philosophy is that the rivers flooding is a disaster and that it should be curbed. River flooding, in lowland areas particularly, is good for agriculture and ecology. If all human civilization and development are due to sustainability of agriculture then there is no earth process that is more beneficial to… Continue reading The interlinking of rivers offers some solutions, but comes with a big load of problems

Environment, Geography, GS-1, GS-3, Uncategorized

Aerosols, land-use changes may greatly weaken monsoon

The South Asian Monsoon has been weakening since the 1950s with an increased incidence of extreme rainfall events. The monsoon is mainly driven by thermal contrast between the Indian subcontinent and the adjoining ocean. As the land warms up the air above the land surface is heated and rises up and is less dense than… Continue reading Aerosols, land-use changes may greatly weaken monsoon

Environment, Geography, GS-1, GS-3, Uncategorized

El Niño, the ‘Godzilla’ warming the winter?

More than half the winter is gone and most of India has hardly even noticed the cold. Temperatures are 4-5 degrees Celsius above the normal for this time of the year. This could turn out to be the warmest winter in India in several years. Scientists are blaming both global and regional/local factors. Globally, it… Continue reading El Niño, the ‘Godzilla’ warming the winter?

Editorials, Geography, GS-1, Indian Economy, Uncategorized

Tackling the demographic challenge

Until recently, India’s large population was considered to be a huge barrier to prosperity and progress. Economists predicted that India was a “population bomb” waiting to explode. However, in the post-liberalisation era, with China showing the way and proving that a massive population can be harnessed for societal and economic progress, a new mantra is… Continue reading Tackling the demographic challenge

Environment, Geography, GS-1, Uncategorized

A, B, C, D of El Nino

What happens in a Normal Year? Peru Current = Humboldt Current = Cold Current. During normal year 2 things are very strong – Cold Peru Current and Trade Winds. As a result, cold water is dragged from Peru towards Australia. What would be the result of this exchange? Warm water region around Australia is called Western… Continue reading A, B, C, D of El Nino

Environment, Geography, GS-1, Uncategorized

Explained: Why is Chennai under water?

While stormwater drains are supposed to be planned on the basis of detailed topographical data, their linkage with water bodies, construction along their course, and the design of roads have rarely been seen as part of a whole. As a result, drains constructed over the past decade have repeatedly proved inefficacious — and showed up… Continue reading Explained: Why is Chennai under water?