Give three examples each for constituentsof rain that originate (1) from sea salt particles, and (2) from atmospheric gases.
Na, K, Ca
SO4, NO3, CO2
What is the typical life time of seasalt aerosols in air?
3 days
Which is the dominant anion/cation in river water/seawater?
anion
cation
river
HCO3-
Ca2+
sea
Cl-
Na+
Where does the inorganic carbon dissolved in river water originate from? Gice two sources and explain the process.
Atmosphere: ingassing of CO2
Remineralization of plant material
weatehring: eg. limestone weathering by wind/rain
weathering of rocks – dissolution of limestone and silicate-minerals (Albite); e.g.: CaCO3 + CO2 + H2O→Ca2+ + 2HCO3-
atmospheric CO2 input – CO2 + H2O→HCO3- + H+
Explain congruent and incongruent chemical weathering processes of minerals (no chemical equations required), and provide one example for each.
congruent: simple dissolution -> all constituents end up in solution (olivine/calcite/halite)
incongruent: dissolution and some pre precipitation and /or oxidation forms secondary minerals (Feldspar, Volcanic glass)
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