气候变化影响下不同地区苦竹异戊二烯排放速率对比

doi:10.13287/j.1001-9332.201806.031

摘要/Abstract

摘要： 以全球气候模式NorESM1-M产生的RCP2.6、RCP4.5、RCP6.0和RCP8.5气候变化情景数据和植物异戊二烯排放计算模型,模拟分析了未来气候变化对分布在江苏宜兴、广东龙门、云南玉龙和四川万源的苦竹异戊二烯排放速率的影响,比较了气候变化影响下4个地区苦竹异戊二烯排放速率的差异.结果表明: 未来气候变化情景下,宜兴、龙门、玉龙和万源的年均气温上升、年降水量和辐射强度波动较大、同时存在增长和下降趋势.在基准情景下,苦竹异戊二烯日排放速率为71～470 μg·g^-1·d^-1、年排放速率为25954～171231 μg·g^-1·a^-1,日及年排放速率大小依次为龙门、宜兴、万源和玉龙.相比基准情景,未来气候变化情景下苦竹异戊二烯日排放速率高4～45 μg·g^-1·d^-1,其中宜兴、龙门、玉龙和万源分别约高23、29、4和14 μg·g^-1·d^-1以上;未来气候变化情景下苦竹异戊二烯日排放速率增幅在5%以上,其中万源和宜兴为13%以上、龙门和玉龙为5%以上,RCP8.5情景下最大(11%～18%).相比基准情景,未来气候变化情景下苦竹异戊二烯年排放速率高1500～17000 μg·g^-1·a^-1,其中,宜兴高8560～13208 μg·g^-1·a^-1、龙门高10862～16131 μg·g^-1·a^-1、玉龙高1574～3028 μg·g^-1·a^-1、万源高5288～8532 μg·g^-1·a^-1;苦竹异戊二烯年排放速率增幅为6%～14%,宜兴和万源最高、龙门和玉龙较低,在RCP8.5情景下增幅9%～14%.说明未来气候变化对分布在不同地区的苦竹异戊二烯排放速率的影响程度不同.

Abstract: 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 isoprene emissions model, the effects of climate change on the isoprene emission rate from leaves of Pleioblastus amarus in Yixing City of Jiangsu Province, Longmen County of Guangdong Province, Yulong Naxi Autonomous County of Yunnan Province and Wanyuan City of Sichuan Province were simulated. The differences of isoprene emission rate from leaves of P. amarus distributed in four regions were compared under future climate change scenarios. The results showed that mean annual air temperature would increase, annual precipitation and radiation intensity would greatly fluctuate, with the coexistence of increasing and decreasing trends in the four regions. In the baseline scenario, daily mean emission rate of isoprene from leaves of P. amarus was 71-470 μg·g^-1·d^-1, and annual mean value was 25954-171231 μg·g^-1·a^-1. The daily and annual emission rates in the four regions decreased with the order of Longmen, Yixing, Wanyuan and Yulong. Compared with the baseline scenario, daily mean emission rate of isoprene from leaves of P. amarus was about 4-45 μg·g^-1·d^-1 higher in future climate change scenario, and which was about 23, 29, 4, and 14 μg·g^-1·d^-1 higher than that in baseline in Yixing, Longmen, Yulong and Wanyuan, respectively. In addition, the emission rate of isoprene from leaves of P. amarus was more than 5% higher in the future climate change scenario than that in the baseline scenario, which was higher in Wanyuan and Yixing (>13%) than and lower in Longmen and Yulong (>5%). All the four regions reached the highest rate under RCP8.5 scenario (increased by about 11%-18%). Compared with the baseline scenario, annual emission rate of isoprene in the future climate change scenario was about 1500-17000 μg·g^-1·a^-1, and which was about 8560-13208 μg·g^-1·a^-1 higher in Yixing, 10862-16131 μg·g^-1·a^-1higher in Longmen, 1574-3028 μg·g^-1·a^-1 higher in Yulong, 5288-8532 μg·g^-1·a^-1 higher in Wanyuan. In addition, the increasing rate of annual isoprene emission rates was 6%-14%. The rates in Yixing (8%-12%) and Wanyuan (8%-14%) were higher than that in the other two regions, the rate in Yulong (6%-12% increase) was the lowest, with all four regions increasing substantially (9%-14%) under RCP8.5 scenario. The results suggested that climate change would have different effects on the rate of isoprene emissions from leaves of P. amarus distributed in diffe-rent regions.

徐天莹,吴建国,王立. 气候变化影响下不同地区苦竹异戊二烯排放速率对比[J]. 应用生态学报, 2018, 29(6): 2028-2042.

XU Tian-ying, WU Jian-guo, WANG Li. The effects of climate change on isoprene emission rate from leaves of Pleioblastus amarus in different regions.[J]. Chinese Journal of Applied Ecology, 2018, 29(6): 2028-2042.

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