Hello Meritnation experts
Please answer my following query :
Why are there so less cyclones on the west side of India in size as well as frequency as compared to East side of India which is hit by massive cyclones almost every year ?
Regards
Dear Student ,
Reasons for less cyclones in Arabian Sea and West Coast could be :
1. Cyclones forming over the Bay of Bengal are either those develop in situ over southeast Bay of Bengal and adjoining Andaman Sea or remnants of typhoons over Northwest Pacific and then move across south China sea to Indian Seas. As the frequency of typhoons over Northwest Pacific is very high (about 35 % of the global annual average), the Bay of Bengal also gets its increased number of cyclones each year.
The cyclones over the Arabian Sea either originate in situ over southeast Arabian Sea (which includes Lakshadweep area also) or remnants of cyclones from the Bay of Bengal that move across south peninsula. As the majority of Cyclones over the Bay of Bengal weaken over land after landfall, the frequency of migration into Arabian Sea is low.It is main reason of founding more cyclones over Bay of Bengal than the Arabian Sea .
2. In addition to all the above the Arabian Sea water or current is relatively colder than Bay of Bengal and hence inhibits the formation and intensification of the system. So the surface temperature criteria for cyclone formation is not fulfilled.Where as in Bay of Bengal it is full of warm water fulfilling the deal condition to form a cyclone over it .
3. During Monsoon, the eastern coast/ Arabian sea receives more rainfall, this leads to creation of barrier layers. This means vertical wind shear is high. This large value of wind shear tend to disrupt the organisations of the thunderstorms that is important to the inner part of the cyclone.
Thus eastern part gets most of cyclones where it has less frequency for the western part .
Regards
Reasons for less cyclones in Arabian Sea and West Coast could be :
1. Cyclones forming over the Bay of Bengal are either those develop in situ over southeast Bay of Bengal and adjoining Andaman Sea or remnants of typhoons over Northwest Pacific and then move across south China sea to Indian Seas. As the frequency of typhoons over Northwest Pacific is very high (about 35 % of the global annual average), the Bay of Bengal also gets its increased number of cyclones each year.
The cyclones over the Arabian Sea either originate in situ over southeast Arabian Sea (which includes Lakshadweep area also) or remnants of cyclones from the Bay of Bengal that move across south peninsula. As the majority of Cyclones over the Bay of Bengal weaken over land after landfall, the frequency of migration into Arabian Sea is low.It is main reason of founding more cyclones over Bay of Bengal than the Arabian Sea .
2. In addition to all the above the Arabian Sea water or current is relatively colder than Bay of Bengal and hence inhibits the formation and intensification of the system. So the surface temperature criteria for cyclone formation is not fulfilled.Where as in Bay of Bengal it is full of warm water fulfilling the deal condition to form a cyclone over it .
3. During Monsoon, the eastern coast/ Arabian sea receives more rainfall, this leads to creation of barrier layers. This means vertical wind shear is high. This large value of wind shear tend to disrupt the organisations of the thunderstorms that is important to the inner part of the cyclone.
Thus eastern part gets most of cyclones where it has less frequency for the western part .
Regards