Consider the following statement with respect to Omega Block : Assertion [A] : The Omega Block over Europe has been conclusively established as the primary cause of India’s delayed monsoon. Reason [R] : Scientists are still examining whether the Omega Block’s diversion of atmospheric jet stream has influenced the Indian Monsoon.
[A] is false, but [R] is true
An Omega Block is a persistent high-pressure system squeezed between two low-pressure systems, so that the jet stream bends around it in the shape of the Greek letter Ω. Because it stays in place for days, it diverts the normal flow of weather systems.
Assertion [A] is false: an Omega Block over Europe has been discussed as one possible factor behind the slow advance of the Indian monsoon, but it has not been conclusively established as the primary cause. Monsoon onset and progress depend on many factors such as sea-surface temperatures, El Niño conditions and the Indian Ocean Dipole.
Reason [R] is true: scientists are still studying whether the block's diversion of the jet stream influenced the monsoon. In fact [R] directly contradicts [A], because a link that is still being examined cannot have been conclusively established, so the choices that call [A] true do not hold.
[A] is false, but [R] is true option is correct.
Important Questions from Climatology
In which of the following atmospheric layers ozone gas is concentrated?
Ozone layer depletion is a major phenomenon in :
By which layer of the atmosphere the ultra-violet rays are absorbed ?
The layer of very rare air above the mesosphere is called the _____________.
Air moves from the region where the air _______.
