Question
Q53.With reference to Ocean Mean Temperature (OMT), which of the following statement is/are correct?
1. OMT is measured up to a depth 26 C isotherm which is 129 meters in the south-western Indian Ocean during January — March.
2. OMT collected during January-March can be used in assessing whether the amount of rainfall in monsoon will be less or more than a certain long-term mean.
Select the correct answer using the code given below:
A. 1 only
B. 2 Only
C. Both 1 and 2
D. Neither 1 nor 2
Answer: B
Detailed Explanation
- The Hindu – Ocean mean temperature can better predict Indian summer monsoon. Compared with SST which has 60% success rate of predicting the Indian summer monsoon, OMT has 80% success rate.
- The energy created by the motion of molecules in the ocean is measured through Ocean Temperature.
- Ocean Mean Temperature(OMT) is measured up to a depth of 26 degrees isotherm. It is measured with the help of satellites that orbit the earth.
- In the Indian ocean, OMT is analyzed by measuring the ocean thermal energy during the period from January to March.
- The 26 degrees isotherm is seen at depths varying from 50–100 meters.
- During January–March, the mean 26 degrees C isotherm depth in the Southwestern Indian Ocean is 59 meters.
- The temperature of the ocean water on the surface is known as Sea Surface Temperature
- Sea surface temperature (SST) is routinely used for predicting whether the total amount of rainfall that India receives during the monsoon season. Compared with SST which has 60% success rate of predicting the Indian summer monsoon, OMT has an 80% success rate.
- Ocean mean temperature(OMT) is a better indicator of monsoon rainfall than sea surface temperature (SST) because it measures ocean thermal.
- This worked because the sea surface temperature is restricted to the skin of the ocean which doesn’t have the kind of impact as that of the heat content of the upper ocean.
