Release time:2023-10-19  Hits:

• Key Words:ORGANIC-COMPOUND EMISSIONS; ISOPRENE EMISSION; OZONE EXPOSURE; SCOTS PINE; MONOTERPENE EMISSIONS; LIPID-PEROXIDATION; TERPENE EMISSIONS; ELEVATED OZONE; VOLATILE; STRESS
• Abstract:Soil drought and nitrogen (N) deposition can influence the biogenic volatile organic compound (BVOC) emis and thereby their ozone (O3) and secondary organic aerosol (SOA) formation. This study addressed their single and combined effects on BVOC emis of Pinus thunbergii by laboratory simulation experiments. The results showed that light drought (LD, 50% soil volumetric water content (VWC)) stimulated isoprene, monoterpene, sesquiterpene, and total BVOC emis, while moderate drought (MD, 30% and 40% VWC) and severe drought (SD, 10% and 20% VWC) inhibited their emis (except for sesquiterpene in 20% VWC). N deposition decreased other VOC emis and increased isoprene and sesquiterpene emis. Total BVOCs and monoterpene were stimulated in low N deposition (LN, 2 g N/(m2 center dot yr)) and inhibited in moderate (MN, 5 g N/(m2 center dot yr)) and high N deposition (HN, 10 g N/(m2 center dot yr)). Under combined treatment of soil drought and N deposition, total BVOC, monoterpene, and other VOC emis were inhibited, sesquiterpene had no significant change, and isoprene emi was inhibited in MD combined treatment but promoted in SD. The O3 formation potential (OFP) and SOA formation potential (SOAP) from the changed BVOC emis were calculated, OFP and SOAP of BVOC emis and their compositions ied significantly among the treatments. Our study provided theoretical basis for assessing the impact of climate change and atmospheric pollution on BVOC emis and their contribution to the formation of secondary atmospheric pollution.
• Volume:316
• Issue:无
• Translation or Not:no