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首页> 外文期刊>Environmental Science & Technology >Heating Rate of Light Absorbing Aerosols: Time-Resolved Measurements, the Role of Clouds, and Source Identification
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Heating Rate of Light Absorbing Aerosols: Time-Resolved Measurements, the Role of Clouds, and Source Identification

机译：吸收光的气溶胶的加热速率：时间分辨测量，云的作用和源识别

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摘要

Light absorbing aerosols (LAA) absorb sunlight and heat the atmosphere. This work presents a novel methodology to experimentally quantify the heating rate (HR) induced by LAA into an atmospheric layer. Multiwavelength aerosol absorption measurements were coupled with spectral measurements of the direct, diffuse and surface reflected radiation to obtain highly time-resolved measurements of HR apportioned in the context of LAA species (black carbon, BC; brown carbon, BrC; dust), sources (fossil fuel, FF; biomass burning, BB), and as a function of cloudiness. One year of continuous and time-resolved measurements (5 min) of HR were performed in the Po Valley. We experimentally determined (1) the seasonal behavior of HR (winter 1.83 ± 0.02 K day~(–1); summer 1.04 ± 0.01 K day~(–1)); (2) the daily cycle of HR (asymmetric, with higher values in the morning than in the afternoon); (3) the HR in different sky conditions (from 1.75 ± 0.03 K day~(–1) in clear sky to 0.43 ± 0.01 K day~(–1) in complete overcast); (4) the apportionment to different sources: HR_(FF) (0.74 ± 0.01 K day~(–1)) and HR_(BB) (0.46 ± 0.01 K day~(–1)); and (4) the HR of BrC (HR_(BrC): 0.15 ± 0.01 K day~(–1), 12.5 ± 0.6% of the total) and that of BC (HR_(BC): 1.05 ± 0.02 K day~(–1); 87.5 ± 0.6% of the total).
机译：吸收光的气溶胶（LAA）吸收阳光并加热大气。这项工作提出了一种新颖的方法，通过实验量化由LAA诱导进入大气层的加热速率（HR）。多波长气溶胶吸收测量与直接，漫射和表面反射辐射的光谱测量相结合，以获得在LAA物种（黑碳，BC，棕碳，BrC，粉尘），来源（化石燃料，FF；生物质燃烧，BB），并且是混浊的函数。在Po Valley进行了为期一年的连续和时间分辨的HR测量（5分钟）。我们通过实验确定（1）HR的季节性行为（冬季为1.83±0.02 K天〜（–1）；夏季为1.04±0.01 K天〜（–1））； （2）HR的每日周期（不对称，早上的值高于下午的值）； （3）不同天空条件下的HR（从晴朗天空中的1.75±0.03 K天〜（–1）到完全阴天的0.43±0.01 K天〜（–1））； （4）分配给不同来源：HR_（FF）（0.74±0.01 K天〜（–1））和HR_（BB）（0.46±0.01 K天〜（–1））； （4）BrC（HR_（BrC）：0.15±0.01 K天〜（–1），占总数的12.5±0.6％）和BC的HR（HR_（BC）：1.05±0.02 K day〜（ –1）；占总数的87.5±0.6％）。

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  • 来源
    《Environmental Science & Technology》 |2018年第6期|3546-3555|共10页
  • 作者

    Luca Ferrero; Griša Močnik; Sergio Cogliati; Asta Gregorič; Roberto Colombo; Ezio Bolzacchini;

  • 作者单位

    POLARIS Research Centre, Department of Earth and Environmental Sciences, University of Milano-Bicocca, 20126, Milano, Italy,GEMMA Centre, Department of Earth and Environmental Sciences, University of Milano-Bicocca, 20126, Milano, Italy;

    Aerosol d.o.o., Kamniška 41, SI-1000 Ljubljana, Slovenia,Department of Condensed Matter Physics, Jozef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia;

    GEMMA Centre, Department of Earth and Environmental Sciences, University of Milano-Bicocca, 20126, Milano, Italy,Remote Sensing of Environmental Dynamics Lab., Department of Earth and Environmental Sciences, University of Milano-Bicocca, 20126, Milano, Italy;

    Aerosol d.o.o., Kamniška 41, SI-1000 Ljubljana, Slovenia,Center for Atmospheric Research, University of Nova Gorica, SI-5000 Nova Gorica, Slovenia;

    GEMMA Centre, Department of Earth and Environmental Sciences, University of Milano-Bicocca, 20126, Milano, Italy,Remote Sensing of Environmental Dynamics Lab., Department of Earth and Environmental Sciences, University of Milano-Bicocca, 20126, Milano, Italy;

    POLARIS Research Centre, Department of Earth and Environmental Sciences, University of Milano-Bicocca, 20126, Milano, Italy,GEMMA Centre, Department of Earth and Environmental Sciences, University of Milano-Bicocca, 20126, Milano, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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