कौन से दो प्राथमिक कारक संयुक्त रूप से पृथ्वी की बड़े पैमाने की सतही और गहरी समुद्री धाराओं (ocean currents) को संचालित करते हैं?

Consider the following statements regarding ocean currents: 1. Difference in water density is a primary cause for the movement of ocean currents. 2. Density of water depends on temperature, salinity and pressure. 3. As a rule, deep ocean waters move from areas of higher density to areas of lower density. Which of the statements given above is/are correct?

The accumulation of water in the western part of the Atlantic Ocean driven by the equatorial currents is compensated by the: