This leads to an increase in water levels of the ocean, further increasing global heating. The Arctic and Antarctic Sea ice are also melting due to warmer temperatures of water. As a result, there were serve hurricane increases, such as Hurricane Katrina in 2005. In places such as the tropical seas, surface temperatures have increased as much as 0.5 degrees Celsius (1 degree Fahrenheit) between the 1990s and the mid-1960s. However, as time progressed global warming (phenomenon where the average annual temperature of the Earth increases) is changing the ocean's average temperature. Recordings have shown that the average temperature of water ranges from 0-3 degrees Celsius (32–37.5 degrees Fahrenheit).īack in 1899 it was estimated that 92% of the ocean floor had a temperature of lower than 40 degrees Fahrenheit. A CTD (Conductivity, Temperature and Depth) instrument (usually placed in the water from a ship or a platform) measures temperature in the deep ocean. There is a thermo cline meaning there is a quick change in temperature when entering the deeper surface of water. The barrier begins around 100 meters and can extend another few hundred meters downwards. There is a barrier between the surface water and deeper layers of the ocean that are not mixed. The average temperature of the entire ocean surfaces usually ranges from 15 to 17 degrees Celsius (59 to 62.9 degrees Fahrenheit). Water temperatures can be low as -2 degrees Celsius (28.4 degrees Fahrenheit) at the Arctic and Antarctic Seas. In the Persian Gulf which is located near the equator, water can be as warm as 36 degrees Celsius (98.6 degrees Fahrenheit). The temperature here usually varies with latitude. Only the first few tens or so meters of water is able to absorb solar radiation causing different temperature at different surface.

Less than 2% of the Earth's surface water is freshwater the rest, is just saltwater. The World Ocean consists of five other oceans, which are the Arctic Ocean, Atlantic Ocean, Indian Ocean, Pacific Ocean, and Antarctic or Southern Ocean.

The ocean has an area of 361 million square kilometers, it has a volume over 1,340 million cubic kilometers and it has an average depth of 3,711 meters. The ocean is an enormous body of salt water that covers about 70% of the Earth's surface. 'So even though surface waters can be a comfortable 20 degrees Celsius (good for swimming in!), the majority of our ocean water has a temperature between 0-3 degrees Celsius (32-37.5 degrees Fahrenheit).' 'The average temperature of the ocean surface water is about 17 ☌ (62.6 F).' Temperature of Ocean Water, University of Michigan. 'It is estimated that 92 per cent of the entire sea-floor has a temperature lower than 40 degrees Fahr.' Royal Geographical Journal: (Great Britain). National Environmental Satellite, Data, and Information Service 6 February 2006. 'The average temperature of the ocean is 3.9 ☌ (39 F).'

'Below the ocean's top sun-warmed layer is much denser and colder (50 F) layer.' 'Below the thermoclines water temperatures decrease slowly to about 35-37 F in most deep-oceans bottoms.' The Oceans: A Book of Questions and Answers.

Deeper than the ocean book