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Monday, March 21, 2011

The Oceans: Balancing our climate

                                                                                                                

Greenhouse Effect Photo


The world’s oceans play an important role in regulating world climate. So much so that they have been referred to as weather’s ‘steering wheel’. They act in several ways. First of all, oceans store heat when it is too hot either during the summer or and during the day and then release heat in another season or at night. But oceans are not just storage tanks. They are also vehicles: currents carry heat in great quantities from hot regions to cold regions. And when the heart returns the atmosphere, marine breezes push it towards the continents. This is why it is often warmer closer to the ocean than farther inland. The Gulf Stream, for instance, carries warm water from the tropics and warms up the west coats of Europe. This is the reason the climate in western Europe is much milder than in central Europe.

                                                                   
Sunlight Effect
                                                                 
Sea warm water
                                                                 

Atmospheric
                                                                   
Ice Land animal
                                                                   
Weather Testing

         Rainfall is also directly linked to the oceans. The evaporation of seawater fills the air with water vapour and this creates clouds. The amount of evaporation controls could frequency and size. In the tropics evaporation is so grate during the day that when the sun sets and the air cools down, storm clouds form and cause short and violent downpours. Around 380,000 cubic kilometers of water evaporate from the surface of seas and oceans each year and only one-quarter of this amount falls on the continents. The relationship between the world’s oceans and the atmosphere is extremely complex: winds and currents criss-cross and cause all kinds of climatic variations, from simple sea breezes to terrible hurricanes, which can be devastating. One such variation is called ‘EI Nino’. This large scale oceanic phenomenon occurs in the pacific and upsets the climate over that entire region of the globe, sometimes affecting even greater areas.

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