Geography

. The El Nino-Southern Oscillation (ENSO) is an irregular cycle of change in wind and sea surface temperatures over the tropical eastern Pacific Ocean, affecting the climate of much of the tropics and subtropics. The warming phase of the sea temperature is known as El Nino and the cooling phase as La Nina. This sea … Read more

The Inter Tropical  Convergence Zone (ITCZ) or Thermal Equator is a broad trough of low pressure in  equatorial latitudes (it always remains on the north of the equator due to effect of  landmass). This is where the northeast and the southeast trade winds converge and this  is a low pressure zone. This convergence zone lies … Read more

They can be of various types depending upon the process of precipitation,  obstacles etc. Convectional Rain The, air on being heated, becomes light and rises up in convection  currents. As it rises, it expands and loses heat and consequently, condensation takes  place and cumulous clouds are formed. With thunder and lightening, heavy rainfall  takes place … Read more

.  Process of formation of the fronts is known as frontogenesis. There are four types of fronts: Cold Front When the cold air moves towards the warm air mass, its contact zone is  called the cold front. As the cold front nears your region, the barometer falls.  The cold  air behind the front wedges under … Read more

. The trade winds, westerly and easterlies  are the permanent winds. These blow constantly throughout the year in a particular  direction and they are global in nature.  These play an important role in, and in turn get influenced too, formation of Weather  Cell. Headly Cell The air at the Inter Tropical Convergence Zone (ITCZ) rises … Read more

. Most of the metallic minerals in India occur in the peninsular plateau region in the old  crystalline rocks. Over 97 per cent of coal reserves occur in the valleys of Damodar, Sone, Mahanadi and Godavari.  Areas of high rainfall lack in soluble minerals like Limestone, Gypsum and Salt.  Northern Plains are poor in minerals … Read more

. Some of the major cropping systems are:  Sequential system Multiple crops are grown in a sequence using short duration crops and intense input management. In Maharashtra, a sequence of Rice, Beans and Ground nuts is  followed. It is the most common cropping system in India. Mixed cropping It refers to crop mixture of two … Read more

. India is a tropical country and has around 300 days availability of sunlight which is one of the highest in the world. Germany is a sub-tropical country, now produces almost 40% of its energy from renewable power. India has huge potential.  Solar power has one unique advantage that it can be used to supply … Read more

. Natural vegetation refers to a plant community that has been left undisturbed over a long time, so as to allow its individual species to adjust themselves to climate and soil conditions as fully as possible. Tropical evergreen forests  are found in the western slope of the Western Ghats, hills of the northeastern region and … Read more

Frequent inundation of agricultural land and human settlement, particularly in Assam, West Bengal, Bihar and Eastern Uttar Pradesh (flooding rivers), coastal areas of Orissa, Andhra Pradesh, Tamil Nadu and Gujarat (cyclone) and Punjab, Rajasthan, Northern Gujarat and Haryana (flash floods) have serious consequences on the national economy and society. Floods do not only destroy valuable … Read more