The contribution of plume-scale nucleation to global and regional aerosol and CCN concentrations: evaluation and sensitivity to emissions changes
The contribution of plume-scale nucleation to global and regional aerosol and CCN concentrations: evaluation and sensitivity to emissions changes
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羽流尺度成核对全球和区域气溶胶和 CCN 浓度的贡献：评估和对排放变化的敏感性
DOI：
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发表时间：
2014
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影响因子：
--
通讯作者：
J. Pierce
中科院分区：
文献类型：
--
作者：
R. Stevens;J. Pierce
抽象的。我们实现预测粒子产生的发电厂羽流（P6）子网格硫酸盐参数化的第一次到一个全球性的化学传输模型与在线气溶胶微物理，GEOS-Chem-TOMAS模型。与使用其他两种先前的次网格硫酸盐处理的模拟相比，使用P6次网格硫酸盐的模拟预测了全球大于80 nm（N80）的颗粒的年平均浓度的相似或较小的增加（取决于其他模型假设）。我们在模拟中使用P6亚网格硫酸盐测试颗粒数浓度对SO2或NOx排放变化的敏感性，以代表最近的排放控制变化。对于全球SO2或NOx或SO2和NOx排放量增加50%，我们发现全球每年平均N80分别增加9.00，1.47或10.24%。然而，子网格和网格解决的过程有助于这些变化。最后，我们将模型结果与粒子数浓度的观测结果进行了比较。与以前的治疗亚网格硫酸盐相比，使用的P6参数化一般提高了与观测到的粒子数浓度的相关性。P6参数化能够解决新粒子形成和生长中的空间异质性，而这些空间异质性无法通过关于亚网格硫酸盐的任何恒定假设来解决。然而，由于在这里检查的测量站点的次网格硫酸盐的治疗，每年平均气溶胶粒径分布的差异太小，明确地建立P6提供更好的协议与观测。
Abstract. We implement the Predicting Particles Produced in Power-Plant Plumes (P6) sub-grid sulphate parameterization for the first time into a global chemical-transport model with online aerosol microphysics, the GEOS-Chem-TOMAS model. Compared to simulations using two other previous treatments of sub-grid sulphate, simulations using P6 sub-grid sulphate predicted similar or smaller increases (depending on other model assumptions) in globally, annually averaged concentrations of particles larger than 80 nm (N80). We test in simulations using P6 sub-grid sulphate the sensitivity of particle number concentrations to changes in SO2 or NOx emissions to represent recent emissions control changes. For global increases of 50% in emissions of either SO2 or NOx, or both SO2 and NOx, we find that globally, annually averaged N80 increase by 9.00, 1.47, or 10.24% respectively. However, both sub-grid and grid-resolved processes contribute to these changes. Finally, we compare the model results against observations of particle number concentrations. Compared with previous treatments of sub-grid sulphate, use of the P6 parameterization generally improves correlation with observed particle number concentrations. The P6 parameterization is able to resolve spatial heterogeneity in new-particle formation and growth that cannot be resolved by any constant assumptions about sub-grid sulphate. However, the differences in annually averaged aerosol size distributions due to the treatment of sub-grid sulphate at the measurement sites examined here are too small to unambiguously establish P6 as providing better agreement with observations.
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影响因子：
6.3
作者：
D. Spracklen;J. Jimenez;K. Carslaw;D. Worsnop;M. J. Evans;G. Mann;Q. Zhang;M. Canagaratna;
通讯作者：
D. Spracklen;J. Jimenez;K. Carslaw;D. Worsnop;M. J. Evans;G. Mann;Q. Zhang;M. Canagaratna;
影响因子：
6.3
作者：
Heald, C. L.;Coe, H.;Dunlea, E. J.
通讯作者：
Dunlea, E. J.
影响因子：
158.5
作者：
DOCKERY, DW;POPE, CA;SPEIZER, FE
通讯作者：
SPEIZER, FE
影响因子：
5
作者：
Peng, RD;Dominici, F;Samet, JM
通讯作者：
Samet, JM