MAX-DOAS retrieval of aerosol extinction properties in Madrid, Spain

MAX-DOAS retrieval of aerosol extinction properties in Madrid, Spain
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西班牙马德里气溶胶消光特性的 MAX-DOAS 反演

DOI:
10.5194/amt-9-5089-2016
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发表时间:
2016-10
影响因子:
3.8
通讯作者:
Saiz-Lopez Alfonso
Saiz-Lopez Alfonso
中科院分区:
地球科学3区
文献类型:
--
作者:
Wang Shanshan;Cuevas Carlos A.;Friess Udo;Saiz-Lopez Alfonso

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抽象的。2015年3月至9月,在西班牙马德里的城市环境中进行了多轴差分光学吸收光谱(MAX-DOAS)测量。O 4在紫外(UV)光谱区的吸收被用来反演气溶胶消光廓线使用的反演算法。结果表明,每小时反演的气溶胶光学厚度(AOD)和相关的气溶胶机器人网络(AERONET)产品之间的一致性很好,相关系数R = 0.87。较高的AOD被发现在夏季由于更频繁地发生撒哈拉沙尘入侵。地面气溶胶消光系数的MAX-DOAS测量检索还比较原位PM2.5浓度。这两个测量之间的协议水平表明,MAX-DOAS检索有能力来表征消光的气溶胶粒子附近的表面。检索算法还用于研究2015年5月12日的严重沙尘入侵案例。的MAX-DOAS检索识别的灰尘事件,包括一个升高的颗粒层的能力进行了研究沿着与空气质量的后向轨迹分析。
Abstract. Multi-axis differential optical absorption spectroscopy (MAX-DOAS) measurements were performed in the urban environment of Madrid, Spain, from March to September 2015. The O4 absorption in the ultraviolet (UV) spectral region was used to retrieve the aerosol extinction profile using an inversion algorithm. The results show a good agreement between the hourly retrieved aerosol optical depth (AOD) and the correlative Aerosol Robotic Network (AERONET) product, with a correlation coefficient of R =  0.87. Higher AODs are found in the summer season due to the more frequent occurrence of Saharan dust intrusions. The surface aerosol extinction coefficient as retrieved by the MAX-DOAS measurements was also compared to in situ PM2.5 concentrations. The level of agreement between both measurements indicates that the MAX-DOAS retrieval has the ability to characterize the extinction of aerosol particles near the surface. The retrieval algorithm was also used to study a case of severe dust intrusion on 12 May 2015. The capability of the MAX-DOAS retrieval to recognize the dust event including an elevated particle layer is investigated along with air mass back-trajectory analysis.
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