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Unformatted text preview: tempted to ask what couples biological nitrogen
fixation and denitrification in the ocean, so that the amount of fixed
nitrogen in the ocean remains relatively stable over timescales longer
than a few thousand years. Although many hypotheses have been put 125 Human
N2 fixation Fossil-fuel burning Lightning Atmosphere
100 N2 fixation Deposition: 20 + 55
Emission: 20 + 50 110 + 35 NO3 and NH4 NO3
NH4 N2 100 + 15 N2 Nitrification
and denitrification Denitrification 8+4 Denitrification 170 + 20 N2O Atmospheric
10 + 40 N2 fixation
NH4 N2 Land Denitrification 240 N2 5 Nitrification
4 N2 N2O Ocean Reactive
30 + 50 ‘...
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This note was uploaded on 01/30/2014 for the course ESCI 271 taught by Professor Lisakellman during the Fall '12 term at St. Francis Xavier, Antigonish.
- Fall '12