PDF-Lecture 5 - Trace Elements in Seawater

Trace Elements. CS Mexico INTRODUCTION INTRODUCTION About 75 of Earth s surface is water of this quantity Saltwater oceans hold 9725 of surface water and only 3 is fresh water but only 07 it is available for human use from rives streams lakes ground water etc The o CS Mexico INTRODUCTION INTRODUCTION About 75 of Earth s surface is water of this quantity Saltwater oceans hold 9725 of surface water and only 3 is fresh water but only 07 it is available for human use from rives streams lakes ground water etc The o First lecture:. 1. Depth and Pressure . 2. Temperature. 3. Heat. 4. Potential temperature. Second and third lectures:. 1. Salinity. 2. Density. 3. Freezing point, sea ice. 4. Potential density. 5. Isopycnal surfaces . TC. ) = . Total Organic Carbon (. TOC. ) + Total Inorganic Carbon (. TIC. ) . TOC preparation. :. ~0.25 g dry, powdered sample. acidified in baked glass beaker with 1N . HCl. , @ 60 . o. C. 70% of the Earth is covered by . o. cean water!. Seawater Composition. Ocean water is made up of three things:. 1.) Dissolved Gases . 2.) Organic Molecules. 3.) Salts. Seawater is a solution.. Solution: Made of a solute and a solvent. . Part 5. Density Zones. The . ocean is broken . into . density zones. The 3 density . zones are controlled . by: . Temperature. salinity. Zone 1:. Surface . zone – the upper layer of the ocean, . least . Min Li . and. Azadeh Davoodi. Department of Electrical and Computer Engineering . University of Wisconsin-Madison. . W. ISCAD.  . Electronic Design . Automation Lab. http://. wiscad.ece.wisc.edu/. Post-Silicon . Debug. Min Li . and . Azadeh. Davoodi. Department of Electrical and Computer Engineering . University of Wisconsin-Madison. . W. ISCAD.  . Electronic Design . Automation Lab. Lecture 32 . The Antarctic Ice Record. Much subsequent . paleoclimate. effort has focused on . δD. in ice cores from Antarctica and Greenland.. The . Vostok. core from Antarctica went back 400 . ka. The solubility and saturation value for gases in seawater increase as temperature and salinity decrease and as pressure increases.. 1. . Solubility. is the ability of something to be dissolved and go into solution.. Marine Science Unit 4:. umassmarine.net. Marine Science: Chemical Oceanography . Day 1 – Water Structure and Properties. Objectives:. Explain the structure . of a water . molecule.. What is a polar molecule?. during Crystallization. Lecture 27. Trace Elements During Crystallization. As for melting, we can imagine two possibilities: equilibrium and fractional crystallization.. Equilibrium crystallization occurs when the total liquid and total solid remain in equilibrium throughout the crystallization. If we define . i) Largest scales: oceanic inventories. Residence time (. kyr. ). ‘…you conveniently ignore all that stoichiometric variability. …’ . (Gideon . Henderson, . GEOTRACES mtg., London, . Dec . igneous rocks. Trace element properties. Present in concentrations < 0.1 weight percent (< 1000 ppm. ).. Includes elements Rb, Sr, Zr, Ba, Li, Ni, Cu, V, W, Ag, Au, Cr, Co, Sn, etc. (some are economic.