Friday, January 02, 2015

Global Ocean Heat, 1958 - 2013

The following link has various graphs showing info on ocean temperature and sea level changes due to temperature changes.

These graphs can be viewed by clicking on the small numbered squares at the bottom of the graph.

The description of the graphs is listed below the graph.

The following is #3 Comparison of Global Heat Content 0-700 meters layer vs. 0-2000 meters layer, for five-year (pentadal) averages.

Sea level change - Sea level can change, both globally and locally, due to (i) changes in the shape of the ocean basins, (ii) changes in the total mass of water and (iii) changes in water density. sea level changes induced by changes in water density are called steric. Density changes induced by temperature changes only are called thermosteric, while density changes induced by salinity changes are called halosteric. See also Relative Sea Level; Thermal expansion.

Sea level equivalent (SLE) - The change in global average sea level that would occur if a given amount of water or ice were added to or removed from the oceans.

Sea-level rise - An increase in the mean level of the ocean. ► Eustatic sea-level rise is a change in global average sea level brought about by an increase in the volume of the world ocean. ► Relative sea-level rise occurs where there is a local increase in the level of the ocean relative to the land, which might be due to ocean rise and/or land level subsidence. In areas subject to rapid land-level uplift, relative sea level can fall.

Sea surface temperature (SST) - The sea surface temperature is the temperature of the subsurface bulk temperature in the top few meters of the ocean, measured by ships, buoys and drifters. From ships, measurements of water samples in buckets were mostly switched in the 1940s to samples from engine intake water. Satellite measurements of skin temperature (uppermost layer; a fraction of a millimeter thick) in the infrared or the top centimeter or so in the microwave are also used, but must be adjusted to be compatible with the bulk temperature.

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