properties of ocean water - weber school...
TRANSCRIPT
Dissolved Gases
• Gases can enter the ocean from streams,
volcanoes, organisms, and the atmosphere.
• Gases dissolve better in colder water
The Oceans as a Carbon Sink
• Large amount of CO2
• Oceans contain more than 60 times as much carbon as the atmosphere does.
Dissolved Solids
• Oceans are 96.5% pure water and 3.5% dissolved solids
• Sea salts
• Halite - Sodium and chloride 85% of solids
Sources of Dissolved Solids
• volcanic eruptions
• weathering of rock on land
• chemical reactions between sea water and newly formed sea-floor rocks
Salinity
• a measure of the amount of dissolved salts in a given amount of liquid
• Ocean 3.5% salts, fresh water 0.1% salts
Temperature of Ocean Water
• Surface water depends on amount of solar energy; temp. decreases as latitude increases
• Movement of water (currents)
The Thermocline
• a layer in which water temperature drops with increased depth faster than it does in other layers
• boundary
Density (cont.)
• Affected by salinity – dissolved solids add mass so, more salinity = higher density
• Affected by temperature – the colder it is the denser it is.
• Densest water at the poles