王婷^1,,
王普才^1,2,,
1. 中国科学院大气物理研究所中层大气与全球环境探测重点实验室, 北京 100029
2. 中国科学院大学, 北京 100049

基金项目: 国家自然科学基金（41505021，41575034），国家重点研发计划（2016YFC0200403）和高分辨率对地观测系统重大专项应用共性关键技术项目（05-Y20A16-9001-15/17）联合资助


详细信息

作者简介: 王婷, 女, 1986年出生, 助理研究员, 主要从事大气污染物探测反演研究.E-mail:wangting@mail.iap.ac.cn

通讯作者: 王普才, 男, 1963年出生, 研究员, 主要从事大气探测及污染物反演研究.E-mail:pcwang@mail.iap.ac.cn

中图分类号: P401

收稿日期:2017-05-03
修回日期:2017-12-30
上线日期:2018-02-05

Assessment of MAX-DOAS aerosol retrieval over North China

WANG Ting^1,,
WANG PuCai^1,2,,
1. Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
2. University of Chinese Academy of Sciences, Beijing 100049, China


More Information

Corresponding author: WANG PuCai,E-mail:pcwang@mail.iap.ac.cn

MSC: P401

--> Received Date: 03 May 2017
Revised Date: 30 December 2017
Available Online: 05 February 2018


摘要
摘要:基于华北典型污染地区的地基多轴差分吸收光谱仪（MAX-DOAS）近4年的观测数据，利用最优估计算法和LIDORT辐射传输模式反演了该区域气溶胶的消光系数垂直廓线和光学厚度（AOD）.MAX-DOAS观测反演的AOD与全球气溶胶观测网络同波段在华北地区的AOD间具有很好的一致性，相关系数都在0.9以上，证明MAX-DOAS具备对华北污染区域气溶胶光学厚度和消光系数垂直廓线的反演能力.AOD的反演误差表现为冬季最大，春夏最小，早晚大于正午，这是因为冬季以及早晚太阳天顶角较大导致信噪比偏小，所以AOD反演误差偏大.反演廓线表明该区域气溶胶主要集中在1 km以下的边界层，浓度随高度呈指数递减，部分情况下峰值出现在300 m处；气溶胶光学厚度夏季最大，冬季最小，正午较大，早晚较小.在东风条件下浓度最高，表明东边（即重工业城市唐山方向）的输送对香河和周边区域的气溶胶积聚有重要贡献.
关键词: MAX-DOAS/
O₄/
气溶胶消光系数垂直廓线/
AOD

Abstract:Based on 4-year MAX-DOAS measurements at the Xianghe Observatory, the aerosol extinction profiles and AODs are retrieved using the optimal estimation algorithm and LIDORT radiative transfer model. The results show a general consistency between the retrieved AODs by MAX-DOAS and AERONET product in the same spectral range, with correlation coefficient about 0.9, supporting the capability of MAX-DOAS to derive AOD as well as aerosol extinction profile over North China which suffers enormous air-pollution. The retrieval error tends to be worse in winter-time and morning/evening when the Solar Zenith Angle (SZA) is large, because large SZA induces relatively poor signal to noise ratio and thus large retrieval error. With retrieved aerosol extinction profiles in the Xianghe area, it is found that most of aerosol content is confined within the boundary layer below 1 km with an exponential decay with height. In some cases, however, the aerosol extinction profile peaks at 300 m. With regard to seasonal and diurnal cycles, AOD is higher in mid-day and lower in morning and evening, and annual maximum occurs in summer and minimum in winter. The aerosol loading is heaviest in the case of east wind, suggesting the significant contribution of wind-driven particle transport from Tangshan, a heavy industrial city in North China, to the local accumulation of aerosols in the Xianghe area.
Key words:MAX-DOAS/
O₄/
Aerosol extinction profiles/
AOD



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