Differences in East Asian summer monsoon responses to Asian aerosol forcing under different emission inventories
Differences in East Asian summer monsoon responses to Asian aerosol forcing under different emission inventories
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不同排放清单下东亚夏季风对亚洲气溶胶强迫的响应差异
DOI：
10.1016/j.accre.2022.02.008
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发表时间：
2022-03
影响因子：
7.4
通讯作者：
Zhang Xiaoye
中科院分区：
文献类型：
--
作者：
Wang Chense;Wang Zhili;Lei Yadong;Zhang Hua;Che Huizheng;Zhang Xiaoye
相反的亚洲人为气溶胶排放趋势可能导致不同的气候响应。本文利用全球气溶胶/大气化学-气候耦合模式研究了2006-2014年东亚夏季风对亚洲人为气溶胶排放变化的响应（BCC_AGCM2.0_CUACE/Aero），有两套排放清单：耦合模式相互比较项目第6阶段（CMIP 6）采用的共同体排放数据系统（CEDS）清单和北京大学（PKU）开发的清单。2006-2014年亚洲人为气溶胶排放量的变化在两份清单之间存在显著差异，特别是在中国东部，观察到完全相反的趋势（即，CEDS库存增加，但PKU库存显著减少）。两个清单的亚洲人为气溶胶强迫的扰动模拟显示，气溶胶光学厚度，气溶胶有效辐射强迫，云液态水路径，和总云量在中国东部相反的变化。模拟的“偶极型”变化（即，在北京大学的资料库下，亚洲气溶胶的辐射收支（印度增加，中国减少）及其引起的变化与相应的观测结果一致。在CEDS资料下，亚洲人为气溶胶强迫使中国东部地区夏季地表温度降低0 ~ 0.4K，而在PKU资料下，亚洲人为气溶胶强迫使中国东部地区夏季地表温度升高0.1- 0.8K。PKU清单下亚洲气溶胶强迫导致的东亚夏季风指数减弱是CEDS清单下的两倍（-0.4 vs.-0.2）。2006-2014年中国东部夏季“南旱北方涝”现象的形成与亚洲“偶极子型”气溶胶强迫有关。在总的响应中，海洋对区域偶极子型气溶胶强迫的缓慢响应主导了东亚夏季风环流的减弱和中国东部降水的变化。本研究进一步证实了亚洲地区人为气溶胶排放的偏差会影响基于CMIP 6的区域气候归因。
Opposite anthropogenic aerosol emission trends in Asia can lead to different responses of the climate. Here, we examined the responses of the East Asian summer monsoon (EASM) to changes in Asian anthropogenic aerosol emissions during 2006–2014 using a global aerosol/atmospheric chemistry–climate coupled model (BCC_AGCM2.0_CUACE/Aero) with two sets of emission inventories: the Community Emissions Data System (CEDS) inventory adopted by the Coupled Model Intercomparison Project Phase 6 (CMIP6) and the inventory developed at Peking University (PKU). The changes in Asian anthropogenic aerosol emissions during 2006–2014 between the two inventories were remarkably different, particularly in eastern China where completely opposite trends were observed (i.e., increase in the CEDS inventory, but significant reduction in the PKU inventory). The perturbation simulations with the Asian anthropogenic aerosol forcing from the two inventories showed opposite changes in aerosol optical depth, aerosol effective radiative forcing, cloud liquid water path, and total cloud cover in eastern China. The simulated ‘dipole-type’ changes (i.e., increase in India but decrease in China) in Asian aerosols and the resulting changes in local radiation budget under the PKU inventory were consistent with the corresponding observations. The summer surface temperatures over eastern China decreased by 0–0.4 K because of the Asian anthropogenic aerosol forcing under the CEDS inventory, while they increased by 0.1–0.8 K under the PKU inventory. The weakening of the EASM index caused by the Asian aerosol forcing under the PKU inventory was twofold greater than that under the CEDS inventory (−0.4 vs. −0.2). The Asian ‘dipole-type’ aerosol forcing contributed to the observed summer ‘southern drought and northern flood’ phenomenon in eastern China during 2006–2014. The slow ocean-mediated response to the regional ‘dipole-type’ aerosol forcing dominated the weakening of the EASM circulation and the precipitation changes in eastern China in the total response. This study further confirms that the biases in anthropogenic aerosol emissions over Asia can affect the CMIP6-based regional climate attribution.
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影响因子：
6.3
作者：
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DOI：
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期刊：
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DOI：
10.3402/tellusb.v64i0.18965
发表时间：
2012-01
期刊：
Tellus B: Chemical and Physical Meteorology
影响因子：
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作者：
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