Global long-term carbon cycle

Computation on global long-term carbon cycle and climate change... 

In Chapter 3, hydrothermal and volcanic gas fluxes from submarine back-arc basins and island arc are estimated. These fluxes are compared with midoceanic ridge hydrothermal fluxes. Particularly, hydrothermal flux of CO2 is considered and the influences of this flux on global long-term carbon cycle and climate change in Tertiary-Quaternary ages are discussed in Chapter 4. 

The global carbon cycle. Values in brackets are preanthropogenic reservoir sizes in Pg (10 g) values on the arrows are fluxes in Pgy . Dashed lines represent the long-term carbon cycle determined by weathering. Values are normalized to the flux of Die from rivers (see Chapter 2). Solid arrows are the shorter-term carbon fluxes associated with photosynthesis and respiration. 

It has long been known that the long-term carbon cycle is linked to the weathering of silicate rocks (for example, see Berner 1992a, 1995). The influence of silicate weathering on the global carbon cycle has been the focus of intense discussion because of its potential impact on the concentration of atmospheric CO2 through the reaction ... 

To solve this problem, we need to make computer calculations on the long-term global carbon cycle including the effect of terrestrial biota, ocean circulation pattern, and metamorphic activities which are not included in Kashiwagi et al. (2000) s computation. 

J. (2002). Plant community composition mediates both large transient decline and predicted long term recovery of soil carbon under climate warming. Global Biogechem. Cycles 16(4), 1055. 

Trudinger C. M., Enting I. G., Erancey R. J., Etheridge D. M., and Rayner P. J. (1999) Long-term variability in the global carbon cycle inferred from a high-precision CO2 and delta C-13 ice-core record. Tellus 51B, 233-248. 

---