气候变化对太岳山中部油松单萜烯排放的影响

Effects of climate change on monoterpenes emission rate from leaves of Pinus tabuliformis distributed in the middle of Taiyue Mountains

以全球气候模式Nor ESM1-M产生的RCP2.6,RCP4.5,RCP6.0和RCP8.5气候变化情景数据和植物VOCs排放计算模型,模拟分析了气候变化对山西太岳山中部油松叶片单萜烯排放速率的影响.结果显示,未来气候变化影响下山西太岳山中部气温呈上升趋势,降水和辐射强度波动大.在RCP2.6,RCP4.5,RCP6.0和RCP8.5情景与基准情景下,油松单萜烯日排放速率在1~210d呈上升趋势,在210~365d呈下降趋势;在未来气候变化情景下比基准情景下高约2μg/(g·d),在RCP8.5情景下最高;油松单萜烯日排放速率在未来气候变化情景与基准情景下差异在1~95d和296~365d较小,在96~295d波动较大.同时,相比基准情景,单萜烯日排放速率增幅在1~190d较高(增加12%~14%以上),在191~315d较小(增加9%~13%以上),在316~365d增加12%~18%以上,在RCP8.5情景下增幅最大(增加14%以上).另外,油松单萜烯年排放速率在未来气候变化情景下比基准情景下平均高约1000μg/(g·a)以上,在RCP8.5情景下增幅最大(约12%).说明,未来气候变化将使油松单萜烯排放速率增加.

Based on the climate change scenarios of RCP2.6, RCP4.5, RCP6.0 and RCP8.5 produced by the global climate model of NorESM1-M and the model of monoterpenes emission from plant, the effects of future climate change on monoterpenes emission rate from leaves of Pinus tabuliformis were projected. The results showed that the annual air temperature would increase consistently, and the annual precipitation amount would increase or decrease with high fluctuations, and the radiation intensity would decline or increase in the future climate change scenarios in the middle of Taiyue Mountains. Following climate change, the daily emission rate of monoterpenes from leaves of Pinus tabuliformis would increase from 1to 210 days and then would decline after that time, and the increasing extent was the highest in the RCP8.5 scenario. And the daily emission rate from leaves of Pinus tabuliformis in the future climate change scenario was about 2μg/（g·d） higher than that in the baseline scenario, which was the highest in the RCP8.5 scenario. In addition, the difference of the daily emission rate of monoterpenes from leaves of Pinus tabuliformis between in future climate change scenario and in baseline scenario was lower from 1 to 95days and from 296 to 365 days than that in the other periods during the whole year, and it fluctuated greatly from 96 to 294 days during the whole year. Compared with the baseline scenario, the daily emission rate of monoterpenes from leaves of Pinus tabuliformis in the future climate change scenarios increased much more obvious from 1~190days （increased by more than 12%~14%）, and it increased lower in the 191~315days （increased about 9%~13%）, and it increased by 12%~18% or more in the 316~365 days during the whole year, and the increasing extent was the highest in the RCP8.5 scenario （more than 14%）. In addition, the annual emission rate of monoterpenes from leaves of Pinus tabulaeformis in the future climate change scenario was higher by about 1000μg/（g·a） or above than that in the baseline scenario, and increasing extent was the highest （about 12%） in the RCP8.5 scenario within four scenarios. The results suggested that the rate of monoterpenes emissions from leaves of Pinus tabuliformis would increase follow future climate change.