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首页> 外文会议>International Conference on Nucleation and Atmospheric Aerosols >Organic Aerosol Formation From Biogenic Compounds Over The Ponderosa Pine Forest In Colorado
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Organic Aerosol Formation From Biogenic Compounds Over The Ponderosa Pine Forest In Colorado

机译：从丘陵植物的生物化合物在科罗拉多州的柚子植物中形成有机气溶胶

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The secondary organic aerosol (SOA) formation and regional growth from biogenic precursors is of particular interest given their abundance in the atmosphere, and has been investigated during the Rocky Mountain Biogenic Aerosol field Study in 2011 in the pine forest canopy (dominated by terpene emissions) using both WRF/Chem 4km simulations and the GECKO-A explicit chemistry box-model runs. We have quantified the relative contribution of different biogenic precursors to SOA levels that were measured by the aerosol mass spectrometer at the site, and investigated the relative contribution of OH, O_3 and NO_3 chemistry to the formed SOA mass during day- and nighttime. Although, the local production and mass concentrations of submicron organic aerosols at the site seem relatively modest ~1-2 ug/m3, we show that the optically active regional mass is increased as the SOA formation continues for several days in the background forest air. We investigate whether the simplified SOA parameterizations used in 3D models can capture this growth. In addition, preliminary comparisons of the number concentrations and the composition of ultrafine particles (8 - 30nm) from WRF/Chem simulations and TD-CIMS measurements are also discussed, and the contribution of organic aerosols to CCN formation is quantified.
机译：次级有机气溶胶（SOA）形成和生物前体的区域生长是特别感兴趣的，在大气中，在2011年的岩石山生物原池田间研究期间已经在松树林冠层（以萜烯排放主导地位）进行了研究使用WRF / Chem 4KM模拟和壁虎 - 一个显式化学盒式型号。我们已经量化了不同生物前体的相对贡献，通过该部位的气溶胶质谱仪测量的SOA水平，并研究了在白天和夜间在形成的SOA质量中的OH，O_3和NO_3化学的相对贡献。虽然，局部生产和质量浓度的亚微米的有机气溶胶似乎相对适度〜1-2 ug / m3，我们表明，由于SOA形成在背景森林空气中持续数天，光学活性的区域群众增加。我们调查3D模型中使用的简化的SOA参数化是否可以捕获此增长。此外，还讨论了来自WRF / Chem模拟和TD-CIMS测量的数量浓度和超细颗粒（8-30nm）的数量浓度和组合物的初步比较，并定量了有机气溶胶对CCN形成的贡献。

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