A satellite-measured view of aerosol component content and optical property in a haze-polluted case over North China Plain
A satellite-measured view of aerosol component content and optical property in a haze-polluted case over North China Plain
复制标题
华北平原雾霾污染情况下气溶胶成分含量和光学特性的卫星测量图
DOI：
10.1016/j.atmosres.2021.105958
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发表时间：
2022
影响因子：
5.5
通讯作者：
Xiaoye Zhang
中科院分区：
文献类型：
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作者：
Lei Li;Huizheng Che;Xindan Zhang;Cheng Chen;Xingfeng Chen;Ke Gui;Yuanxin Liang;Fu Wang;Yevgeny Derimian;David Fuertes;Oleg Dubovik;Yu Zheng;Lei Zhang;Bin Guo;Yaqiang Wang;Xiaoye Zhang
定向偏振相机（DPC）是中国第一颗星载多角度偏振传感器，搭载于2018年5月9日发射的高分五号（GF-5）卫星上。本文介绍了卫星观测的气溶胶组分（如矿物尘中的黑碳、棕碳、氧化铁等）的时空变化特征。在华北平原（36-41°N，113-123°E）的一个重霾污染个例中，首次成功地利用DPC/GF-5仪器的测量数据反演了气溶胶组分含量和光学性质。我们还揭示了吸收/散射组分的质量比和气溶胶吸收的多角度偏振卫星测量的基础上，这与以前的实验室研究和现场研究的间接验证气溶胶组分反演的可比协议之间的关系。此外，通过敏感性试验，对DPC多角度偏振观测反演气溶胶光学特性和组分含量的可行性、稳定性和不确定度进行了评价和评估。DPC/GF-5气溶胶光学厚度（AOD）的分布与卫星观测的中分辨率成像光谱仪（MODIS）AOD和地面CARSNET（中国气溶胶遥感网）AOD产品相一致。因此，多角度偏振卫星测量显示了令人鼓舞的潜力，气溶胶光学，微物理和化学性质的综合反演。该算法的研究结果和进一步应用，将有助于减少气候变化评估的不确定性，提供大时空尺度的气溶胶组分，特别是粉尘中的黑碳、棕碳和铁氧化物的测量。
The Directional Polarimetric Camera (DPC) is the first Chinese satellite-borne multi-angle polarimetric sensor onboard the GaoFen-5 (GF-5) satellite, which was launched on May 9th 2018. In this paper, we present the spatiotemporal variability of satellite-measured aerosol components (such as, black carbon, brown carbon, iron oxides contained in mineral dust etc.) over North China Plain (36–41°N, 113–123°E) for a heavily haze-polluted case, to demonstrate the first successful retrievals of aerosol component content and optical property directly from the DPC/GF-5 instrument measurements. We also reveal the relationship between absorbing/scattering component mass ratio and aerosol absorption based on the multi-angle polarimetric satellite measurements, which presents comparable agreement with previous laboratory studies and field studies for an indirect validation of aerosol component retrievals. In addition, the feasibility, stability and uncertainty of the aerosol optical property and component content retrievals from DPC multi-angle polarimetric observations were evaluated and assessed by sensitivity tests. The distributions of DPC/GF-5 aerosol optical depth (AOD) are in line with satellite-observed MODIS (Moderate-resolution Imaging Spectroradiometer) AOD and ground-based CARSNET (China Aerosol Remote Sensing Network) AOD products. Therefore, the multi-angle polarimetric satellite measurements show an encouraging potential for the comprehensive inversion of aerosol optical, microphysical and chemical properties. The results and further applications of this component algorithm in the future are helpful to reduce the uncertainty of climate change assessment by providing the measurements of aerosol component, in particular for black carbon, brown carbon, and iron oxides contained in dust, with large and extensive spatiotemporal scale.