"महासागरीय धारायें": अवतरणों में अंतर
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आशीष भटनागर (वार्ता | योगदान) No edit summary |
आशीष भटनागर (वार्ता | योगदान) No edit summary |
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पंक्ति 7:
महासागरीय धाराएं सागरीय जीवन के लिए अत्यावश्यक होती हैं। ये सागरीय जीव-जंतुओं के लिए आहार का मुख्य स्रोत होती हैं। सागर तरंगों से गर्म जल शीतल जल वाले क्षेत्रों तक जाता है। इसके विपरीत सागरीय तरंगों का असर भू-तापमान पर भी पड़ता है।
== Importance ==
[[Image:Ocean currents 1943 (borderless)3.png|thumb|right|250px|A 1943 map of the world's ocean currents.]]
Knowledge of surface ocean currents is essential in reducing costs of shipping, since they reduce fuel costs. In the sail-ship era knowledge was even more essential. A good example of this is the [[Agulhas current]], which long prevented Portuguese sailors from reaching India. Even today, the round-the-world sailing competitors employ surface currents to their benefit. Ocean currents are also very important in the dispersal of many life forms. An example is the [[eel story|life-cycle of the eel]].
Ocean currents are important in the study of [[marine debris]], and vice versa. These currents also affect temperatures throughout the world. For example, the current that brings warm water up the north Atlantic to northwest Europe stops ice from forming by the shores, which would block ships from entering and exiting ports.
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