Exploring Ocean Temperature and Salinity Variations
Dive into the fascinating world of oceanography with a focus on temperature and salinity variations. Learn about the factors influencing temperature changes across latitudes, the role of the Sun's radiation, and the distribution of salinity within ocean basins. Discover the impact of seawater salinity on ocean environments and the sources of salts in the water. Delve into the complexity of ocean layers and the processes that drive thermal and salinity gradients in Earth's oceans.
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Presentation Transcript
Oceanography II: Oceanography II: Temperature & Salinity Temperature & Salinity Dr. Swarnima Singh Dept of Geography DDUGU
Variations in temperature: sst_jan_04 From north to south due to the Sun s radiation
Changes in the Suns angle cause variations in the amount of solar energy reaching Earth s surface.
Layers of the Ocean: what determines the ocean s layers?
Temperature: warmer at equator cooler near the poles sst_jan_04 Surface temperature variations
Temperature variations within ocean basins: sketch and describe Ocean basins
Salinity of Seawater Water is bipolar The cation sodium attaches to the negative side The anion chlorine attaches to the positive side The figure illustrates dissolved salt
Source of salts? Chemical weathering of rocks (dissolved load) Volcanic activity: outgassing
Do you think salinity varies within ocean basins or is the same? On the surface? Within the basin?
What factors may change the salinity?
Precipitation and Evaporation Red-precipitation Blue-evaporation
Density: how heavy something is relative to its size What factors change the density of sea water? Temperature: increase, decreases density Salinity: increase, increases density
Diatom-phytoplankton Plankton Plankton: microscopic animals and plants bottom of the food chain Use basic nutrients from sea water to produce skeletons and soft tissue phytoplankton produce greater than 50% Zooplankton Copepod- 1mm Dinoflagellate- 250 microm.
