on 2, 13 pts] Using the INFLÓW fluxes from Figure 1, estimate the lifetime of th
ID: 290946 • Letter: O
Question
on 2, 13 pts] Using the INFLÓW fluxes from Figure 1, estimate the lifetime of the carbon in the Earth atmosphere. Show your work. Atmosphere (CO2) 790 100 50 Air-Ocoo 9 Exchang 92 0.1 Wedhering Living Terrestrial Surface 10 Ocean10 1020 50 Deoret ationBiosphere Living M arine 550 Burning 50 Biosphere uttorfal Dead Terrestrial Biosphere 1500 0.2 haing Deep Ocean Preduction 0.1 dion 38100 Carbonate Sediments 70,000,000 0.2 Sodiment ation Organic (or Elemental) C Sediments 20,000.000 Units are Gtons and Gtonslyr Adapted from Chameides, WL Science and Global Changen Osdored University Press, New York, NY, 224 pp, 197 and E M.Perd, Bogeochemical Cycles: A Computer Ineractive Course in Earth Systom Figure 1. Simplified diagram of Carbon cycle. Red boxes and lines are parts of the short term cycle. Blue boxes and lines are parts of the long term cycle. Heavy black lines indicate urbations. Plcase note that reservoir size values are somewhat different from theExplanation / Answer
Total input of Co2 in the atmosphere = 50(respiration) + 92 (ocean to atmosphere) + 6(fossil fuel) + 0.1 (weathering)+ 50(decay) + 2 (deforestation) = 200.1
Total output of Co2 from atmosphere = 100(gross production) + 90 (atmosphere to ocean) = 190
Net addition of CO2 = Input - Output= 200.1-190 = 10.1
Present CO2 concentration = 790
lifetime of atmospheric C = 790 / 10= 79 years
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