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Question
Give reason.
Oceans located at the same latitude do not have same salinity.
Answer in Brief
Solution
- The salinity of the oceans depends on factors like the rate of evaporation and the supply of fresh water.
- In oceans where the rate of evaporation is greater than the supply of fresh water, the salinity is higher.
- In oceans where the supply of freshwater exceeds the rate of evaporation, salinity is low.
- Salinity is not affected much in areas where the supply of fresh water and the evaporation of water are low.
- Thus, oceans located at the same latitude do not have the same salinity.
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Properties of Sea Water - Salinity of the Sea Water
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Complete the table showing the salinity of open and land-locked seas.
| Evaporation of water | Supply of freshwater | |||||
| Region | Latitude | Solar energy | Rainfall | River water | Snow water | Average salinity |
| Equatorial | 0° to 15° | High | Perennial | High | ________ | 34‰ |
| Tropical | 15° to 35° | __________ | Seasonal | ________ | ________ | 37‰ |
| Temperature | 35° to 65° | Low | ___________ | ________ | ________ | 33‰ |
| Polar | 65° to 90° | __________ | ___________ | Low | ample | 31‰ |
| Landlocked sea | Solar energy | Rainfall | River water | Snow water | Average salinity | |
| Mediterranean Sea | High | Low | Low | _______ | 39‰ | |
| Red Sea | _______ | _______ | _______ | _______ | 41‰ | |
| Baltic Sea | Low | _______ | Medium | _______ | 7‰ | |
| Dead Sea | _______ | Very low | Very less | _______ | 332‰ | |
| Caspian Sea | _______ | ______ | ______ | ______ | 155‰ | |
| Great Salt lake | medium | ______ | ______ | ______ | 220‰ | |
