Atmosphere 589 + 240 ±10 (average atmospheric increase:4 PgClyr) Net land flux-

Question

Atmosphere 589 + 240 ±10 (average atmospheric increase:4 PgClyr) Net land flux- Net ocean flux 2.6 ±1.2 2.3 ±0.7 0.7 Rock weathering 0.1 Export from soils to rivers 50 Marine Surface ocean-'hime 900 37 3 Rivers 0.9 Burial 90 101 0.2 Intermediate 11 & deep sea Dissolved Vegetation 37,100organic 350-550 -30 ±45 Soils carbon +155±30 1500-2400 Ocean floor surface sediments 1,750 Fossil fuel reserves Gas: 383-1135 Oil: 173-264 Permafrost 1700 Coal: 446-541 -365 ±30 Units Fluxes: PgCyr Stocks: PgC

Explanation / Answer

figure above uses unit of PgC, whereas other figures (e.g., Figure 3.2 in Houghton) use ppm for atmospheric concentrations. 2.12 PgC is approximately 1 ppm. Convert the current (as of the date of this figure) atmospheric carbon reservoir into the concentration in ppm. Round to the nearest whole number.

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