Evaluations of tropospheric aerosol properties simulated by the community earth system model with a sectional aerosol microphysics scheme.
Evaluations of tropospheric aerosol properties simulated by the community earth system model with a sectional aerosol microphysics scheme.
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DOI：
10.1002/2014ms000421
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发表时间：
2015-06
影响因子：
6.8
通讯作者：
Neely, Ryan R.
中科院分区：
文献类型：
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作者：
Yu, Pengfei;Toon, Owen B.;Bardeen, Charles G.;Mills, Michael J.;Fan, Tianyi;English, Jason M.;Neely, Ryan R.
建立了一个截面气溶胶模式（CARMA），并与社区地球系统模式（CESM1）相结合。气溶胶微物理、辐射特性以及与云的相互作用在尺寸分辨模式中进行了模拟。这里描述的模型使用20个粒径箱为每个气溶胶成分，包括新鲜成核的硫酸盐颗粒，以及含有硫酸盐，原生有机物，黑碳，粉尘和海盐的混合颗粒。该模型还包括五种具有四个挥发性仓的散装二次有机气溶胶。CESM1‐CARMA的总成本大约是CESM1 （CESM1‐MAM3）中标准三模气溶胶模型的计算机时间的2.6倍，是CESM1 （CESM1‐MAM7）中使用类似气相化学代码的七模气溶胶模型的计算机时间的两倍。对气溶胶时空分布进行了模拟，并与来自卫星、地面测量和空中野外活动的大量观测结果进行了比较。模拟的年平均气溶胶光学深度比MODIS/MISR卫星观测和AERONET观测低约32%。这种差异在卫星观测的不确定性范围内。CESM1/CARMA重现的硫酸盐气溶胶质量在8%以内，有机气溶胶质量在20%以内，黑碳气溶胶质量在50%以内，与美国的多年平均值相比，但在个别地点差异很大。其他数据集显示出与模型模拟结果相似的水平。该模式表明，除了硫酸盐外，有机气溶胶也对热带UTLS的气溶胶质量有显著贡献，这与有限的数据一致。建立了一个剖面气溶胶模型，并与群落地球系统模型相结合，通过与多个数据集的模拟对比来评价模型的性能
A sectional aerosol model (CARMA) has been developed and coupled with the Community Earth System Model (CESM1). Aerosol microphysics, radiative properties, and interactions with clouds are simulated in the size‐resolving model. The model described here uses 20 particle size bins for each aerosol component including freshly nucleated sulfate particles, as well as mixed particles containing sulfate, primary organics, black carbon, dust, and sea salt. The model also includes five types of bulk secondary organic aerosols with four volatility bins. The overall cost of CESM1‐CARMA is approximately ∼2.6 times as much computer time as the standard three‐mode aerosol model in CESM1 (CESM1‐MAM3) and twice as much computer time as the seven‐mode aerosol model in CESM1 (CESM1‐MAM7) using similar gas phase chemistry codes. Aerosol spatial‐temporal distributions are simulated and compared with a large set of observations from satellites, ground‐based measurements, and airborne field campaigns. Simulated annual average aerosol optical depths are lower than MODIS/MISR satellite observations and AERONET observations by ∼32%. This difference is within the uncertainty of the satellite observations. CESM1/CARMA reproduces sulfate aerosol mass within 8%, organic aerosol mass within 20%, and black carbon aerosol mass within 50% compared with a multiyear average of the IMPROVE/EPA data over United States, but differences vary considerably at individual locations. Other data sets show similar levels of comparison with model simulations. The model suggests that in addition to sulfate, organic aerosols also significantly contribute to aerosol mass in the tropical UTLS, which is consistent with limited data. A sectional aerosol model has been developed and coupled with the community earth system model Model performance is evaluated by comparing simulations with multiple data sets