OCEA 1002 Lecture Notes - Lecture 1: Iodine, Sodium Chloride, Pycnocline

• School: Dalhousie University
• Department: Oceanography
• Course: OCEA 1002
• Professor: Carolyn Buchwald

Document Summary

Trace metals (useful for figuring out how ocean works) Six major constituents account for 99. 4% of the dissolved solids. Parts per thousand number of solute units existing in one thousand units of solvent. Nutrients occur in much lower concentrations than salts. Nitrogen, phosphorous, silicon, iron (cid:894)lo(cid:449)er (cid:271)e(cid:272)ause the(cid:455)"re (cid:271)ei(cid:374)g used i(cid:374) (cid:271)iolog(cid:455)(cid:895) Cari(cid:271)(cid:271)ea(cid:374) does(cid:374)"t ha(cid:448)e as (cid:373)u(cid:272)h rai(cid:374), ne(cid:449)fou(cid:374)dla(cid:374)d does, rai(cid:374) is fresh(cid:449)ater a(cid:374)d dilutes the salinity. In both the glasses of water the proportion would be the same, but the concentration differs. Hot and dry climates produce oceans with higher salinity than damp, cool climates. Also any other deserts, around 30 degrees n and s latitude. If evaporation exceeds precipitation, the salinity is high! Oceanographers can measure the abundance of a single, easy to measure, ion and estimate salinity from that measurement. Chemists choose to measure chloride because it is abundant and easy to measure (with electrodes) Conductivity of water depends on its salt content.