Comparing The Effects Of Climate Change On Biogenic Volatile Organic Compounds Emission Rate From Leaves Of 20 Plants Distributed In Different Regions

Knowing the effects of climate change on biogenic volatile organic compounds?BVOCs?emission is important to understand the impacts of future climate change on the changing in atmospheric environment.20 tree species were selected as follows:Cyclobalanopsis glauca,Bambusa multiplex,Trachycarpus fortune,Ficus religiosa,Phoenix roebelenii,Cinnamomum camphora,Camellia sinensis,Ficus hispida,Ficus benjamina,Eucalyptus robusta,Ilex chinensis,Casuarina equisetifolia,Bambusa vulgaris,Hevea brassiliensis,Mayodendron igneum,Castanopsis eyrie,Duabanga grandiflora,Pinus massoniana,Cryptomeria fortune and Pinus elliottii,and four concentrated distribution areas were selected for each plant species.Based on the RCP2.6,RCP4.5,RCP6.0 and RCP8.5 climate change scenarios produced by the global climate model NorESM1-M and plant BVOCs emissions model,the effects of future climate change on the isoprene emission rates from leaves of 20 plant species and the monoterpene emission rates from leaves of Pinus elliottii,Hevea brassiliensis,Bambusa vulgaris,Ilex chinensis,Cinnamomum camphora and Cyclobalanopsis glauca distributed in different areas were simulated,and the emission rates of BVOCs were compared in different distributed area of plant species.The main results were as follows:?1?The annual mean air temperature will increase in 1.3—1.5?,and annual precipitation or radiation intensity in China will fluctuate greatly,with the precipitation increasing by 6²0mm and the radiation decreasing by 0.16⁰.18 MJ.m^-2 in future climate change scenarios.?2?In baseline scenario,the BVOCs emission rate of every plant species is the highest in summer and the lowest in winter.Plants have different BVOCs emission rates and the emission rates of the same plant in different regions vary greatly.The higher temperature and light intensity of plant leaves of each elemental area are in,the higher the BVOCs emissions are.?3?Compare with the baseline scenario in periods of 1951-2000,the daily isoprene emission rates will increase by 3%-33%,with a low increase in south China?5%-13%?and southwest China?3%-14%?and a high increase in Tibet?8%-22%?,Xinjiang?25%-33%?,east China?11%-20%?,central China?15%-19%?,north China?14%-19%?and northwest China?8%-19%?;And daily emission rates of monoterpene will increase by 6%-14%,with a low increase in south China?6%-10%?and southwest China?6%-11%?and a high increase in Tibet?9%-14%?,east China?7%-12%?,central China?9%-12%?and northwest China?10%-13%?.?4?Compare with the baseline scenario in periods of 1951-2000,the annual BVOCs emission rates or the ratios of annual emission rate will increase in 2001-2050,and the annual isoprene emission rates will increase by 3%-23%,with a low increasing in south China?3%-11%?,southwest China?3%-13%?and northwest China?3%-13%?and a high increasing in Xinjiang?18%-23%?,Tibet?6%-17%?,east China?8%-16%?,central China?8%-12%?and north China?9%-17%?;annual monoterpene emission rates will increase by 6%-13%,with a low increasing in east China?7%-11%?,south China?6%-10%?and southwest China?6%-11%?and a high increasing in Tibet?9%-13%?,central China?8%-12%?and northwest China?9%-13%?.In the future climate change scenarios,the changes of daily BVOCs emission rates fluctuate greatly from May to September and slightly from January to April or from October to December,while the ratios of daily emission rate normally fluctuate greatly from January to April or from October to December and slightly from May to September.The results suggest that future climate change will result in increasing BVOCs emission rates from leaves of plants distributed in different regions,but the effects will depend on the regions and plant species.