Table of Contents
What does the Indian Ocean dipole effect?
The Indian Ocean Dipole, or IOD, is a natural climate phenomenon that influences rainfall patterns around the Indian Ocean, including Australia. Positive IODs are associated with an increased chance for dry weather in southern and southeast Australia.
What is meant by Indian Ocean dipole?
The Indian Ocean Dipole (IOD) is defined by the difference in sea surface temperature between two areas (or poles, hence a dipole) – a western pole in the Arabian Sea (western Indian Ocean) and an eastern pole in the eastern Indian Ocean south of Indonesia.
Why is the Indian Ocean dipole having a significant effect on Australia’s wildfires?
The Indian Ocean Dipole (IOD) is the difference in temperature between the western and eastern Indian Ocean. When the IOD is in positive mode, warmer waters develop off the Horn of Africa and cooler waters develop off Indonesia. This leads to hotter and drier weather in Australia.
What is Enso and how does it affect the monsoon over India?
Changes in the ENSO-Monsoon system Differential heating of the north Indian Ocean and the north west Pacific Ocean and of the Indian landmasses, causes the seasonal reversal of monsoon wind. In summer this wind blows from the oceans to India, getting huge amounts of moisture over the neighboring land.
What is an Indian Ocean dipole discuss its impact on the Indian monsoon Upsc?
Positive Indian Ocean Dipole This phase of the Indian Ocean Dipole is very favourable and beneficial for higher monsoons in the Indian regions. This also leads to a rise in warmer than normal water around the west of the Indian ocean and cooler than normal water in the east of the tropical Indian ocean.
How does IOD Indian Ocean dipole reduces the impact of El Nino on Indian monsoon?
The phenomenon called Indian Ocean Dipole (IOD) refers to the temperature difference between the eastern and western parts of the water body. El Nino phenomenon is getting weak and IOD is moving from neutral to positive. This will help rains in the country. The monsoon would be near normal.
Is the Indian Ocean dipole affected by climate change?
While the IOD is a naturally occurring phenomenon in the Earth’s climate, that does not mean it will not be affected by human-caused warming. And considering the potential impacts of a strong event, understanding how the IOD will respond to a warmer climate is of the utmost importance.
How does the Indian Ocean influence the climate of India?
The Indian Ocean, the Bay of Bengal and the Arabian Sea, exert moderating influence on the climatic conditions. These water bodies provide much needed moisture to the summer monsoons, which provide heavy rainfall. Moreover, the climate of the coastal areas is also modified by the influence of these water bodies.
What is Indian Ocean dipole Upsc?
Indian Ocean Dipole (IOD) is something that happens in the Indian Ocean. It is an atmospheric-ocean-based phenomenon just like the El Nino and La Nina, where the temperatures of the sea surface waters get warmed up in the positive phase of IOD and get cooled up in the negative phase of IOD.
How does El Nino and La Nina affect Indian monsoon Brainly?
El Nino during winter causes warm conditions over the Indian subcontinent and during summer, it leads to dry conditions and deficient monsoon. Whereas La Nina results in better than normal monsoon in India. Crops like Paddy, Maize, Groundnut, Guar, Castor, Tur, Moong and Bajra would suffer due to El Nino.
Which Indian Ocean dipole is good for Indian monsoon?
During the positive phase of IOD, sea surface temperatures are warmer in the western Indian Ocean (which gives a boost to monsoon winds) as compared to the eastern Indian Ocean—hence a dipole nature.
What is the Indian monsoon system?
Indian monsoon, the most prominent of the world’s monsoon systems, which primarily affects India and its surrounding water bodies. It blows from the northeast during cooler months and reverses direction to blow from the southwest during the warmest months of the year.
What is Indian Ocean Dipole?
It will be relatable to the examiner and you will score easy marks! Indian Ocean Dipole (IOD) is an atmosphere-ocean coupled phenomenon in the tropical Indian Ocean (like the El Nino is in the tropical Pacific), characterised by a difference in sea-surface temperatures.
Why do monsoons occur in India?
This condition is favourable for the Indian Monsoon as it causes a kind of barrier in the eastern Indian Ocean and all the southwesterly winds blow towards the Indian sub-continent. Accordingly, the waters in the eastern Indian Ocean cools down, which tends to cause droughts in adjacent land areas of Indonesia and Australia.
How do the two poles of the IoD affect monsoons?
Further, it was shown that the two poles of the IOD – the eastern pole (around Indonesia) and the western pole (off the African coast) were independently and cumulatively affecting the quantity of rains for the Monsoon in the Indian subcontinent.
How does IoD affect the climate of India?
The IOD affects the climate of Southeast Asia, Australia and other countries that surround the Indian Ocean Basin. The Indian Monsoon is invariably influenced by the IOD. IOD is simply the periodic oscillation of sea surface temperatures, from ‘positive’ to ‘neutral’ and then ‘negative’ phases.