The Carbon Cycle according to Wentworth

Document Sample
The Carbon Cycle according to Wentworth Powered By Docstoc
					  The Carbon Cycle according to
          Wentworth
• The following scheme for the Carbon
  Cycle has some features that
  distinguish it from the model presented
  in our text by Robert Ricklefs:
  – Four major pathways are color-coded:
    • Photosynthesis (PS)/Respiration (RS) – green
    • Exchange (Exch.) of CO2 – blue
    • Precipitation (Ppt.)/Dissolution (Diss.) of
      carbonates - red
    • Fossil carbon cycle - black
  The Carbon Cycle according to
          Wentworth
• Features, continued:
  – No reservoir sizes or transfer rates are shown, to
    reduce clutter.
  – Some changes are made to clarify the processes of
    precipitation and dissolution of carbonates.
  – A single fossil carbon reservoir is shown,
    straddling land and ocean to simplify matters.
  – A few additional abbreviations have been used:
     •   Weath. = Weathering of rocks
     •   Volc. = Volcanic release of CO2 from subducted rocks
     •   Sed. = Sedimentation or deposition of fossil carbon
     •   Comb. = Combustion of fossil carbon
             (1) PS/RS (2) Exch. of CO2 (3) Ppt./Diss. Carbonates
Atmosphere
                                 Atmospheric Carbon

                  Comb.     RS         PS     Exch. of CO2         Volc.


                            Terrestrial         Sedimentary
Land




                       Sed. Organic C              Rocks
              Carbon
              Fossil
Oceans




                              Exch. of CO2           Weath.      Uplift
                  Sed.                                Ppt.
                                 RS
                   Oceanic              Oceanic               Sedimentary
                  Organic C            Dissolved C               Rocks
                               PS                     Diss.
             (4) Fossil Carbon Cycle

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:6
posted:10/7/2011
language:English
pages:3