The temperature of ocean water also varies with depth. In cold regions, such as the North Atlantic Ocean, ocean water loses heat to the atmosphere and becomes cold and dense. NESDIS is part of the National Oceanic and Atmospheric Administration (NOAA), and the Department of Commerce. ©Copyright 2012 Ocean Temp | All Rights Reserved | Developed By: WebGuyNYWebGuyNY Water warms up more slowly than air but can hold more heat – water needs 4 times as much energy to raise its temperature by 1ºC as the same mass of air does – so the ocean plays an important part in taking up energy from the Sun and stopping the Earth getting too hot. This process is known as thermohaline circulation. Deep ocean currents. Sea surface temperatures have a large influence on climate and weather. For example, every 3 to 7 years a wide swath of the Pacific Ocean along the equator warms by 2 to 3 degrees Celsius. The surface temperature of the world’s oceans varies mainly with latitude, with the warmest waters generally near the equator and the coldest waters in the Arctic and Antarctic regions. The National Data Buoy Center's home page. Differences in water density, resulting from the variability of water temperature (thermo) and salinity (haline), also cause ocean currents. Sea surface temperature (SST) is the water temperature close to the ocean's surface. Seawater - Seawater - Temperature distribution: Mid-ocean surface temperatures vary with latitude in response to the balance between incoming solar radiation and outgoing longwave radiation. In the ocean, solar energy is reflected in the upper surface or rapidly absorbed with depth, meaning that the deeper into the ocean you descend, the less sunlight there is. Whilst sea temperatures for Key West are as accurate as current data allows, there may be slight local and regional variations depending on conditions. Quality Sea Surface Temperature Charts. There is an excess of incoming solar radiation at latitudes less than approximately 45° and an excess of radiation loss at latitudes higher than approximately 45°. The premier source of meteorological and oceanographic measurements for the marine environment. Ocean currents govern the world's weather and churn a kaleidoscope of life. Sea surface temperature—the temperature of the water at the ocean surface—is an important physical attribute of the world’s oceans. Hadalpelagic Zone The deepest zone of the ocean, the hadalpelagic zone extends from 19,700 feet (6,000 meters) to the very bottom at 36,070 feet (10,994 meters) in the Mariana Trench off the coast of Japan. Air masses in the Earth's atmosphere are highly modified by sea surface temperatures within a short distance of the shore. 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