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Education: Posters |
Aquarius/SAC-D Mission
U.S. and Argentina Working Together to Understand Our Oceans Download (PDF, 4.4 MB) Aquarius/SAC-D
The "'Hands On' Activities & Online Data" panel gives an overview of the classroom lessons that are are grouped by grade level (i.e., elementary, middle, and high school). Aquarius "Online Data Tools" are also highlighted: these help learners better understand how various factors influence salinity patterns, including air temperature, sea surface temperature, evaporation, and precipitation. English Poster: HTML Version | Download PDF (1.1 MB) Spanish Poster: HTML Version | Download PDF (1.2 MB) To order a hard copy of this poster, please write to Annette deCharon. |
Glossary |
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conductivity: A measure of the ability of a material to conduct or transmit an electric charge.
evaporation: The physical process of converting a liquid to a gas. Commonly considered to occur at a temperature below the boiling point of the liquid. practical salinity unit (psu): Used to describe the concentration of dissolved salts in water, the UNESCO Practical Salinity Scale of 1978 (PSS78) defines salinity in terms of a conductivity ratio, so it is dimensionless. Salinity was formerly expressed in terms of parts per thousand (ppt) or by weight (parts per thousand or 0/00). That is, a salinity of 35 ppt meant 35 pounds of salt per 1,000 pounds of seawater. Open ocean salinity is generally in the range from 32 to 37. precipitation: Water released from the atmosphere in the form of rain, snow, hail, or sleet from the atmosphere onto Earth's surface. salinity: A measure of the quantity of dissolved solids in ocean water. In general, salinity reflects the total amount of dissolved solids in ocean water in parts per thousand by weight after all carbonate has been converted to oxide, the bromide and iodide to chloride, and all the organic matter oxidized. Salinity is now measured as practical salinity units (psu). |
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