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midsem_2017_Ls4208 5. What is residence time? How is residence time linked to ocean salinity? Which instrument...

midsem_2017_Ls4208

5. What is residence time? How is residence time linked to ocean salinity? Which instrument can be used to measure salinity of coastal water [1+4+1=6 marks]

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Answer #1

The residence time of any given entity is the amount of time a particular molecule of the entity remains in the reservoir of stady state over a given time period.

Salinity is the concentration of dissolved salts in sea water. Residence time of sodium chloride in the ocean is the average time a sodium atom spends in the ocean, which is same as the time it takes to replace all the sodium in the ocean. Hence, the relation between ocean salinity and residence time can be determined by the following ways- 1) Determine the amount of sodium in the ocean. 2) Determine the sodium flux via rivers.

The conductivity, temperature and depth CTD profiler is used to measure ocean salinity.

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