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Regarding Indian Ocean Dipole (IOD), consider the following statements:
1. A positive Indian Ocean Dipole is characterised by warmer than normal Sea Surface Temperature in the eastern equatorial Indian Ocean.
2. A negative Indian Ocean Dipole results in more cyclones than usual in Arabian Sea.
Which of the statements given above is/are correct?
• 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.
• A ‘positive IOD’ (or simply ‘IOD’) is associated with cooler than normal sea-surface temperatures in the eastern equatorial Indian Ocean and warmer than normal sea-surface temperatures in the western tropical Indian Ocean. Hence, statement 1 is incorrect.
• The opposite phenomenon is called a ‘negative IOD’, and is characterised by warmer than normal SSTs in the eastern equatorial Indian Ocean and cooler than normal SSTs in the western tropical Indian Ocean.
• During a positive IOD the Arabian Sea becomes warmer than Bay of Bengal resulting in more cyclones than usual in Arabian Sea. Hence, statement 2 is incorrect.
• Negative IOD results in stronger than usual cyclonogenesis (Formation of Tropical Cyclones) in Bay of Bengal. Cyclonogenesis in Arabian Sea is suppressed.
• When an Indian Ocean dipole event occurs, the rainfall tends to move with the warm water.
• 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.
• A ‘positive IOD’ (or simply ‘IOD’) is associated with cooler than normal sea-surface temperatures in the eastern equatorial Indian Ocean and warmer than normal sea-surface temperatures in the western tropical Indian Ocean. Hence, statement 1 is incorrect.
• The opposite phenomenon is called a ‘negative IOD’, and is characterised by warmer than normal SSTs in the eastern equatorial Indian Ocean and cooler than normal SSTs in the western tropical Indian Ocean.
• During a positive IOD the Arabian Sea becomes warmer than Bay of Bengal resulting in more cyclones than usual in Arabian Sea. Hence, statement 2 is incorrect.
• Negative IOD results in stronger than usual cyclonogenesis (Formation of Tropical Cyclones) in Bay of Bengal. Cyclonogenesis in Arabian Sea is suppressed.
• When an Indian Ocean dipole event occurs, the rainfall tends to move with the warm water.
Consider the following statements:
1. The Intertropical Convergence Zone is known as Monsoon Front.
2. The pre-monsoon showers are termed as ‘burst’ of the monsoon.
Which of the statements given above is/are correct?
Right Answer: A
• Statement 1 is correct. The Intertropical Convergence Zone (ITCZ) is the region that circles the Earth near the equator, where the trade winds of both the Northern and Southern Hemispheres come together. North of the equator, strong sun and warm water of the equator heats the air in the ITCZ, drawing air in from north and south and causing the air to rise. As the air rises it cools, releasing the accumulated moisture in an almost perpetual series of thunderstorms. Thus, ITCZ is known as the Monsoon Front (ITCZ) or Rainfall occurs along this front.
• The Monsoon, unlike the trades, are not steady winds but are pulsating in nature, affected by different atmospheric conditions encountered by it, on its way over the warm tropical seas.
• The duration of the monsoon is between 100-120 days from early June to mid-September. Around the time of its arrival, the normal rainfall increases suddenly and continues constantly for several days. This is known as the ‘burst’ of the monsoon, and can be distinguished from the pre-monsoon showers. Hence, statement 2 is incorrect.
Right Answer: A
• Statement 1 is correct. The Intertropical Convergence Zone (ITCZ) is the region that circles the Earth near the equator, where the trade winds of both the Northern and Southern Hemispheres come together. North of the equator, strong sun and warm water of the equator heats the air in the ITCZ, drawing air in from north and south and causing the air to rise. As the air rises it cools, releasing the accumulated moisture in an almost perpetual series of thunderstorms. Thus, ITCZ is known as the Monsoon Front (ITCZ) or Rainfall occurs along this front.
• The Monsoon, unlike the trades, are not steady winds but are pulsating in nature, affected by different atmospheric conditions encountered by it, on its way over the warm tropical seas.
• The duration of the monsoon is between 100-120 days from early June to mid-September. Around the time of its arrival, the normal rainfall increases suddenly and continues constantly for several days. This is known as the ‘burst’ of the monsoon, and can be distinguished from the pre-monsoon showers. Hence, statement 2 is incorrect.
Consider the following pairs:
(Name of savanna grasslands& country)
1. Kano: Venezuela
2. Downs: Australia
3. Llanos: Brazil
Which of the pairs given above is/are correctly matched?
Right Answer: A
Right Answer: A
The Sinai peninsula is located between
Right Answer: C
• The Sinai Peninsula located in the Asian part of Egypt between the Mediterranean Sea to the north, and the Red Sea to the south.
• The Sinai Peninsula is defined by the Suez Canal and the Gulf of Suez in west and the Gulf of Aqaba in south east.
Right Answer: C
• The Sinai Peninsula located in the Asian part of Egypt between the Mediterranean Sea to the north, and the Red Sea to the south.
• The Sinai Peninsula is defined by the Suez Canal and the Gulf of Suez in west and the Gulf of Aqaba in south east.
Consider the following statements:
1. The tropical cyclones that influence South Asia is not part of the regional monsoon wind system.
2. A good monsoon is predicted when Indian Ocean has lower atmospheric pressure compared to normal time.
Which of the statements given above is/ are correct?
Right Answer: B
• A tropical cyclone (TC) is a rotational low-pressure system in tropics.The tropical cyclones develop over the warm waters of the Bay of Bengal and the Arabian Sea.
Right Answer: B
• A tropical cyclone (TC) is a rotational low-pressure system in tropics.The tropical cyclones develop over the warm waters of the Bay of Bengal and the Arabian Sea.