Abiotic factors

Abiotic factors regulate the release of most BVOC as a diurnal and daily cycles since the synthesis of these compounds and photosynthesis is regulated by different environmental factors. VOC production dependence on photosynthetically active radiation (PAR) which reaches the canopy, but the effect of CO2 concentration, temperature and humidity of soil and air cannot be ignored. The diurnal and seasonal variation of the different abiotic factors regulates the release of VOC emissions by forming an annual cycle. Large temporal variation in certain plots can be explained my increased abundance of herbivores and mechanical damages.

 

Biogenic volatile organic compounds (BVOC) released from the vegetation will react with OH, O3, Cl and NO2 radicals by forming reaction products which form a cloud nuclei by interacting with biogenic secondary organic aerosols (BSOA). VOC emissions contribute new particle formation through the oxidation which can increase the climate cooling effect by aerosols. The abundance of cloud nuclei formation is creasing faster in the future since rising temperature and CO2 concentration increase BVOC and BSOA emissions from the vegetation.

Gross primary production (GPP), in other words photosynthetic production of vegetation increase synchronous with precipitation and ratio of reflected radiation which means that VOC emissions from vegetation and carbon sequestration activity of the boreal ecosystem will gain strength. The increased carbon sequestration of vegetation forms climate feedback which is accelerated forward by a forest releasing VOC emissions from soil (roots, fungi, microbial community), ground vegetation and trees.

 

Movement of the sun regulates variation of environmental conditions. Solar radiation in the year and in certain day causes cycle of these elements: temperature follows regulation of the sun although there is always certain delay. The daily variation of air temperature impacts to air humidity.

 

Solar radiation is the main factor which drives the productivity of coastal and terrestrial ecosystems and this affects to the global CO2 concentration. The main factor driving CO2 concentration is a house heating, the use of fossil fuels and the global land use change.