OCEA 2000X Lecture Notes - Lecture 10: Bromine, Magnesium
25 Sep 2018
School
Department
Course
Professor
Document Summary
Composition: water, salts, nutrients, trace metals, six major constituents account for 99. 4% of the dissolved solids in sea water, chlorine, sodium, sulfate, magnesium, calcium, potassium. Parts per thousand: the number of units of a specific substance that exist in a thousand total units of a material, typical sea water has 35 grams of salt per one thousand grams of sea water. Major constituents: major constituents vary little over time at most localities, they are called conservative ions, conservative. Nutrients: nutrients are actively used by biology, nutrient concentrations change rapidly in response to biological activity, nutrients are called non-conservative ions, nutrients. 480oc: sea water has about 35g of salt in every 1000g of sea water, giving a salinity of 35% Principle of constant proportions: oceanographers can measure the abundance of a single, easy-to-measure ion and estimate salinity from that measurement, chemists choose to measure cl- because it is abundant and easy to measure.
