2014年APEC会议期间北京地区气溶胶成分遥感研究

大气气溶胶成分的改变对空气污染以及气候变化都有重要影响。遥感能在不破坏气溶胶自然状态的前提下探测气溶胶的成分特性。基于OPAC(optical properties of aerosols and clouds)模型对黑碳(BC)、水溶成分(WASO)、不可溶成分(INSO)、沙尘(DUST)四种气溶胶成分的微物理和光学特性的描述,利用太阳-天空辐射计获取的地基遥感观测,对2014年北京APEC会议前、会中、会后的气溶胶各成分含量及其光学厚度进行定量反演研究。结果显示,APEC会前、会中、会后的光学厚度(440 nm)平均值分别是0.72、0.25、0.57,会中的气溶胶光学厚度明显小于会前和会后,其中INSO成分的光学厚度贡献占主导地位。APEC会前BC、WASO、INSO、DUST质量浓度分别为0.8 μg/m3、 139.6 μg/m3、184.2 μg/m3、194.3 μg/m3,APEC会中四种成分质量浓度分别为1.1 μg/m3、56.4 μg/m3、 40.3 μg/m3、7.8 μg/m3, APEC会后质量浓度分别为1.0 μg/m3、126.6 μg/m3、157.1 μg/m3、 30.9 μg/m3,除了BC成分在会议期间无显著变化外,会中WASO、INSO、DUST成分的质量浓度数值明显低于会前和会后,这说明APEC会议期间北京地区采取的保障措施对空气质量提升起到了较好的作用。利用AE-51黑碳仪对反演的BC质量浓度进行验证,发现遥感反演的BC质量浓度与在位观测具有良好的一致性,相关系数R2=0.68。

Abstract

Variation of aerosol components impact greatly on air pollution and climate change, and remote sensing is able to detect aerosol composition properties while maintaining the natural states of ambient aerosol. Based on microphysical and optical properties of black carbon (BC), water soluble component (WASO), insoluble component (INSO) and mineral dust (DUST) provided by optical properties of aerosols and clouds (OPAC) model, mass concentration of the four components were retrieved and their contributions to total aerosol optical depth were calculated by using aerosol properties acquired from ground-based sun-sky radiometer measurements during APEC Forum days in Beijing in 2014. Results show that the average AOD (440 nm) on APEC Forum days (0.25) is much lower than that of pre-Forum days (0.72) and post-Forum days (0.57), and WASO dominantly contributes to the total aerosol optical depth. Mass density of BC, WASO, INSO, DUST is respectively 0.8 μg/m3, 139.6 μg/m3, 184.2 μg/m3, 194.3 μg/m3 on pre-Forum days, 1.1 μg/m3, 56.4 μg/m3, 40.3 μg/m3, 7.8 μg/m3 on APEC Forum days, and 1.0 μg/m3, 126.6 μg/m3, 157.1 μg/m3, 30.9 μg/m3 on post-Forum days. BC mass density doesn’t change much during APEC Forum, while the numeric numbers of mass densities of WASO, INSO, and DUST in APEC Forum days are much lower compared to those of pre-Forum days and post-Forum days. This illustrates clearly that the control measures for improving air quality undertaken by the government have been taking effect during APEC Forum days. In－situ measurements of BC concentration were used by aethalometer to verify the BC retrieval and find that the retrieved BC mass concentration agrees well with measured content with the correlation coefficient R2 of 0.68.

参考文献

[1] 李正强, 许华, 张莹, 等. 2013严重灰霾污染的主被动遥感监测 [J]. 遥感学报, 2013, 17(4): 919-928.

Li Zhengqiang, Xu Hua, Zhang Ying, et al. Joint use of active and passive remtote sensing for monitoring of severe haze pollution in Beijing 2013 [J]. Journal of Remote Sensing, 2013, 17(4): 919-928(in Chinese).

[2] 北京市环境保护局.本市发布APEC会议空气质量保障措施效果评估结果[OL]. http://www.bjepb.gov.cn/bjepb/324122/416697/ index.html

[3] Li Z, Gu X, Wang L, et al. Aerosol physical and chemical properties retrieved from ground-based remote sensing measurements during heavy haze days in Beijing winter [J]. Atmos. Chem. Phys., 2013, 13(20): 10171-10183.

[4] Ganguly D, Ginoux P, Ramaswamy V, et al. Inferring the composition and concentration of aerosols by combining AERONET and MPLNET data: Comparison with other measurements and utilization to evaluate GCM output [J]. J. Geophys. Res.: Atmos., 2009, 114(D16): 1-5.

[5] Hess M, Koepke P, Schult I. Optical properties of aerosols and clouds: The software package OPAC [J]. Bull. Amer. Meteorol. Soc., 1998, 79(5): 831-844.

[6] Vinoj V, Satheesh S, Babu S, et al. Large aerosol optical depths observed at an urban location in southern India associated with rain-deficit summer monsoon season [J]. Ann. Geophys., 2004, 22(8): 3073-3077.

[7] Satheesh S, Vinoj V, Moorthy K. Radiative effects of aerosols at an urban location in southern India: Observations versus model [J]. Atmos. Environ., 2010, 44(39): 5295-5304.

[8] 魏鹏, 李正强, 王堰, 等. 灰霾污染状况下气溶胶组分及辐射效应的遥感估算 [J]. 遥感学报, 2013, 17(4): 1021-1031.

Wei Peng, Li Zhengqiang, Wang Yan, et al. Remote sensing estimation of aerosol composition and radiative effects in haze days [J]. Journal of Remote Sensing, 2013, 17(4): 1021-1031(in Chinese).

[9] 谢一凇, 李东辉, 李凯涛, 等. 基于地基遥感的灰霾气溶胶光学及微物理特性观测 [J]. 遥感学报, 2013, 17(4): 970-980.

Xie Yisong, Li Donghui, Li Kaitao, et al. Aerosol optical and microphysical properties in haze days based on ground-based remote sensing measurements [J]. Journal of Remote Sensing, 2013, 17(4): 970-980(in Chinese).

[10] Dubovik O, King M. A flexible inversion algorithm for retrieval of aerosol optical properties from Sun and sky radiance measurements [J]. J. Geophys. Res.-Atmos., 2000, 105(D16): 20673-20696.

[11] Aethlabs. MicroAeth Model Aes Operating Manual [OL]. https:// aethlabs.com/sites/all/content /microaeth/microAeth%20Model%20AE51%20O perating %20Manual.pdf

[12] Wang L, Li Z, Tian Q, et al. Estimate of aerosol absorbing components of black carbon, brown carbon, and dust from ground-based remote sensing data of sun-sky radiometers [J]. J. Geophys. Res.-Atmos., 2013, 118(12): 6534-6543.

[13] Dey S, Tripathi S, Singh R, et al. Retrieval of black carbon and specific absorption over Kanpur city, northern India during 2001-2003 using AERONET data [J]. Atmos. Environ., 2006, 40(3): 445-456.

黄为, 谢一凇, 李正强, 张莹, 李东辉, 李凯涛, 李莉, 许华. 2014年APEC会议期间北京地区气溶胶成分遥感研究[J]. 大气与环境光学学报, 2015, 10(4): 278. HUANG Wei, XIE Yisong, LI Zhengqiang, ZHANG Ying, LI Donghui, LI Kaitao, LI Li, XU Hua. Remote Sensing Estimation of Aerosol Composition During APEC Forum in Beijing 2014[J]. Journal of Atmospheric and Environmental Optics, 2015, 10(4): 278.

2014年APEC会议期间北京地区气溶胶成分遥感研究

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