Skip to main content

Not all Indian droughts are caused by El Nino

Important Geophysical phenomena such as earthquakes, Tsunami, Volcanic activity, cyclone etc.

CONTEXT

As per latest findings, nearly six out of 10 droughts, in non-El Nino years, that occurred during the Indian summer-monsoon season in the past century may have been driven by atmospheric disturbances from the North Atlantic region.

In 2014, India saw a 14% rainfall deficit — or a drought — that wasn’t linked to El Nino and before that in 1986 and 1985.

Factors that influence these droughts

  • These droughts are a consequence of a sudden and steep drop in rainfall in late August.
  • Winds in the upper atmosphere are interacting with a deep cyclonic circulation above the abnormally cold North Atlantic waters. The resulting wave of air currents, called a Rossby wave, curved down from the North Atlantic squeezed in by the Tibetan plateau and hit the subcontinent around mid-August, suppressing rainfall and throwing off the monsoon that was trying to recover from the June slump.

What is El Nino?

  • El Nino is a climatic cycle characterised by high air pressure in the Western Pacific and low air pressure in the eastern.
  • During this event, there is a warming of the sea surface temperature in the eastern and central equatorial Pacific Ocean.
  • It is one phase of an alternating cycle known as El Niño Southern Oscillation (ENSO).

What causes El Nino?

  • El Nino sets in when there is anomaly in the pattern.
  • The westward-blowing trade winds weaken along the Equator and due to changes in air pressure, the surface water moves eastwards to the coast of northern South America.
  • The central and eastern Pacific regions warm up for over six months and result in an El Nino condition.

Labels:
Location: bendre layout, Gubbi cross, DR Bendre Layout, Kothanur, Bengaluru, Karnataka 560077, India

Comments

Post a Comment

Popular posts from this blog

Explained: What is Army Aviation Corps, the youngest Corps of the Indian Army

A look at the Army Aviation Corps’ history and its relevance in modern day battlefields, including in Counter Insurgency and Counter Terrorism (CI-CT) operations. Representative Image The Army Aviation Corps (AAC), the youngest Corps of the Indian Army, celebrated its 35th Corps Day on November 1. We take a look at the arm that adds an air dimension to the Army’s capabilities, its history, and its relevance in modern day battlefields, including Counter Insurgency and Counter Terrorism (CI-CT) operations. The roots of Army Aviation Corps The origin of the AAC can be traced back to the raising of the Army Aviation wing of the Royal Air Force in India in 1942, and the subsequent formation of the first Indian Air Observation Post in August 1947. The Air Observation Post units primarily acted as artillery spotters – which are the elements that help the artillery in directing the fire and also giving air support to ground forces. In the wars of 1965 and 1971, the Air Observation Post helicop...
Post a Comment
Read more

Top 10 Best Sainik Schools In India as per NDA Selection

In this article you will get to know about Best Sainik Schools in India, Best Sainik School of India and top 10 Sainik schools in India When India became independent, most of the officers in the defense at that time used to come from elite families. To rectify the regional and class imbalance amongst the Officer cadre of the India Military, V.K Krishna Menon came up with the idea of Sainik Schools. The idea was to prepare students for Entry in the NDA. In Sainik Schools, deserving students can get high-quality education irrespective of their income or class background. The mission of Sainik schools is to prepare the cadets academically, physically, and mentally to enter the portals of the NDA. Today there are 33 Sainik schools running and proposed for future covering all the states of the country. But it has always been a topic of discussion that which of these is the best Sainik School school in India. Why do children take admission in Sainik Schools?  So that they can become offi...
Post a Comment
Read more

That time when India took half of Pakistan to make it pay for a motorcycle

In 1947, British officer Yahya Khan offered his colleague 1,000 rupees for his spiffy red motorcycle. His colleague, Sam Manekshaw, agreed. But before Khan could pay, he was off to what was going to become Pakistan. The British split its Indian colony, and things on the subcontinent have been pretty tense ever since. To top it all off, Yahya Khan didn't pay for the motorbike. But he would, even if it took almost 25 years. The Partition of India was much more than the splitting of the British Raj into two independent states. It was a catastrophic split that tore apart the country and created millions of refugees, cost millions of lives, and split the armed forces of the country in two, all based on religion. Violence erupted almost immediately between the two groups on such a large scale that much of it has never been forgotten or forgiven. Animosity continued between both sides for decades, and the two have fought war after war because of the myriad issues left unaddressed. By 1970...
Post a Comment
Read more