CO2

Volatility of volatile organic compounds (VOC) regulates emissions from the shoot and soil. Other important factor is air CO2 concentration and temperature since both of these factors impact to the stomata conductance in leaves and this affects to the released VOC flux. There are certain monoterpenes which are released from the shoot based on stomata conductance but there are also certain monoterpenes which can be released from the shoot through the cell wall. VOC are released from the shoots based on their volatility.

 

Increasing atmospheric CO2 concentration increases carbon uptake and photosynthesis of plants e.g gross primary productivity (GPP). Increased GPP by the climate change is predicted to increase VOC synthesis and emissions of VOCs from the plant cells. Stomata conductance regulates emissions of those compounds which will release into atmosphere through a stomata. The release of monoterpenes is affected by the temperature dependence of synthesis and storage size.

 

The feedback mechanism formed by be vegetation producing VOC emissions and atmosphere with increasing CO2 concentration can limit the power of global warming affect. Biogenic volatile organic compounds (BVOC) released from the vegetation will react with OH, Cl, O3 and NO2 radicals by forming reaction products which condense into the aerosol particles or form a cloud nuclei by interacting with biogenic secondary organic aerosols (BSOA) (Kulmala et al.,2000, Kulmala et al. 2014). VOC emissions contribute new particle formation through the oxidation which can increase the climate cooling effect by aerosols. The abundance of cloud nuclei formation has been predicted to increase faster in the future since rising temperature and CO2 concentration increase BVOC and BSOA emissions from the vegetation (Kulmala ym.2014). Gross primary production (GPP), in other words photosynthetic production of vegetation increase synchronous with precipitation and reflected radiation which means that carbon sequestration activity of the boreal ecosystem will gain strength (Kulmala ym. 2004, 2014).

 

References

Kulmala, M., Suni, T., Lehtinen, K. E. J., Maso, M. D., Boy, M., Reissell, A., ... & Hari, P. (2004). A new feedback mechanism linking forests, aerosols, and climate. Atmospheric Chemistry and Physics, 4(2), 557–562.

Kulmala, M., Nieminen, T., Nikandrova, A., Lehtipalo, K., Manninen, H. E., Kajos, M. K., ... & Kerminen, V. M. (2014). CO2-induced terrestrial climate feedback mechanism: From carbon sink to aerosol source and back. Boreal Environment Research, 19, 122–131.

Niinemets U. & Monson, R. K. (Eds.). Biology, controls and models of tree volatile organic compound emissions. Tree Physiology, Vol. 5, p. 547, Springer, 2013.