When the oceans plays the critical role in regulating the Earth's climate, and they are both affected by climate change and a significant driver of climate change. They are so many affects of climate change in the oceans. The main reason to affect climate change on oceans is increasing the temperature. The rising of temperature contributes to a rise in sea levels. Oceans are the Largest Heat sink on the planet. They absorb 90% of the excess heat caused by climate change and oceans are also a very efficient carbon sink, absorbing 23% of human-caused CO2 emissions.