Chemistry-driven changes strongly influence climate forcing from vegetation emissions.
Chemistry-driven changes strongly influence climate forcing from vegetation emissions.
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DOI：
10.1038/s41467-022-34944-9
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发表时间：
2022-11-23
影响因子：
16.6
通讯作者：
Archibald, Alex T.
中科院分区：
文献类型：
--
作者：
Weber, James;Archer-Nicholls, Scott;Abraham, Nathan Luke;Shin, Youngsub Matthew;Griffiths, Paul;Grosvenor, Daniel P.;Scott, Catherine E.;Archibald, Alex T.
生物源性挥发性有机化合物（BVOCs）通过气溶胶、气溶胶与云的相互作用（ACI）、臭氧和甲烷的变化影响气候。BVOCs表现出对气候（引起反馈）和土地利用的依赖，但其净气候影响仍存在不确定性。一个因素是对BVOC化学性质的描述。在这里，我们使用地球系统模型UKESM1，通过比较工业化前BVOC排放量加倍的反应与标准和科学状态的化学，来量化化学的影响。净强迫（反馈）是正的：臭氧和甲烷增加，ACI变化超过了增强的气溶胶散射。与先前的研究相反，ACI响应是由抑制气相SO2氧化引起的云滴数浓度（CDNC）降低驱动的。随着化学科学水平的提高，反馈减少了43%，因为较低的氧化剂消耗产生较小的甲烷增加，而CDNC减少。这说明了化学对双挥发性有机化合物气候影响的重大影响，以及双挥发性有机化合物影响气候的途径比目前认识到的更为复杂。双挥发性有机化合物的化学模拟强烈影响双挥发性有机化合物排放量加倍对气候的影响。随着科学化学水平的提高，氧化剂消耗降低，甲烷增加的正强迫减少43%，云反照率降低。
Biogenic volatile organic compounds (BVOCs) affect climate via changes to aerosols, aerosol-cloud interactions (ACI), ozone and methane. BVOCs exhibit dependence on climate (causing a feedback) and land use but there remains uncertainty in their net climatic impact. One factor is the description of BVOC chemistry. Here, using the earth-system model UKESM1, we quantify chemistry’s influence by comparing the response to doubling BVOC emissions in the pre-industrial with standard and state-of-science chemistry. The net forcing (feedback) is positive: ozone and methane increases and ACI changes outweigh enhanced aerosol scattering. Contrary to prior studies, the ACI response is driven by cloud droplet number concentration (CDNC) reductions from suppression of gas-phase SO2 oxidation. With state-of-science chemistry the feedback is 43% smaller as lower oxidant depletion yields smaller methane increases and CDNC decreases. This illustrates chemistry’s significant influence on BVOC’s climatic impact and the more complex pathways by which BVOCs influence climate than currently recognised. The modelling of BVOC chemistry strongly affects how doubling of BVOC emissions affects climate. Lower oxidant depletion with state-of-science chemistry leads to 43% smaller positive forcing from smaller methane increases and cloud albedo decreases.
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影响因子：
6.3
作者：
Carslaw, K. S.;Boucher, O.;Kulmala, M.
通讯作者：
Kulmala, M.
影响因子：
5
作者：
Cao, Yang;Yue, Xu;Ma, Yimian
通讯作者：
Ma, Yimian
影响因子：
5
作者：
Fares, Silvano;Mahmood, Tariq;Centritto, Mauro
通讯作者：
Centritto, Mauro
影响因子：
5
作者：
Jenkin, M. E.;Khan, M. A. H.;Rickard, A. R.
通讯作者：
Rickard, A. R.
影响因子：
6.3
作者：
Grosvenor, Daniel P.;Carslaw, Kenneth S.
通讯作者：
Carslaw, Kenneth S.