Xu Tian-Ying, Wu Jian Guo, Wang Li
College of Fores-try, Gansu Agricultural University, Lanzhou 730070, China.
Chinese Research Academy of Environmental Sciences, Beijing 100021, China.
Ying Yong Sheng Tai Xue Bao. 2018 Jun;29(6):2028-2042. doi: 10.13287/j.1001-9332.201806.031.
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·d, and annual mean value was 25954-171231 μg·g·a. 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·d higher in future climate change scenario, and which was about 23, 29, 4, and 14 μg·g·d 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·a, and which was about 8560-13208 μg·g·a higher in Yixing, 10862-16131 μg·g·a higher in Longmen, 1574-3028 μg·g·a higher in Yulong, 5288-8532 μg·g·a 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.
基于全球气候模型NorESM1-M和植物异戊二烯排放模型生成的RCP2.6、RCP4.5、RCP6.0和RCP8.5气候变化情景，模拟了气候变化对江苏省宜兴市、广东省龙门县、云南省玉龙纳西族自治县和四川省万源市苦竹叶片异戊二烯排放速率的影响。比较了未来气候变化情景下四个地区苦竹叶片异戊二烯排放速率的差异。结果表明，四个地区年平均气温将升高，年降水量和辐射强度将大幅波动，呈增减趋势并存。在基准情景下，苦竹叶片异戊二烯日平均排放速率为71-470μg·g·d，年平均值为25954-171231μg·g·a。四个地区的日排放速率和年排放速率均以龙门、宜兴、万源、玉龙的顺序递减。与基准情景相比，未来气候变化情景下苦竹叶片异戊二烯日平均排放速率比基准情景高约4-45μg·g·d，其中宜兴、龙门、玉龙、万源分别比基准情景高约23、29、4和14μg·g·d。此外，未来气候变化情景下苦竹叶片异戊二烯排放速率比基准情景高5%以上，万源和宜兴（>13%）高于龙门和玉龙（>5%）。四个地区在RCP8.5情景下均达到最高速率（增加约11%-18%）。与基准情景相比，未来气候变化情景下苦竹叶片异戊二烯年排放速率约为1500-17000μg·g·a，其中宜兴比基准情景高约8560-13208μg·g·a，龙门高10862-16131μg·g·a，玉龙高约1574-3028μg·g·a，万源高5288-8532μg·g·a。此外，年异戊二烯排放速率增加率为6%-14%。宜兴（8%-12%）和万源（8%-14%）的增加率高于其他两个地区，玉龙的增加率（增加6%-12%）最低，四个地区在RCP8.5情景下均大幅增加（9%-14%）。结果表明，气候变化对不同地区苦竹叶片异戊二烯排放速率的影响存在差异。
