光谱学与光谱分析 |
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MAX-DOAS Measurements of NO2 Column Densities and Vertical Distribution at Ny-Ålesund, Arctic During Summer |
LUO Yu-han1,2, SUN Li-guang1*, LIU Wen-qing2, XIE Pin-hua2, SI Fu-qi2, ZHOU Hai-jin2 |
1. Institute of Polar Environment, School of Earth & Space Sciences, University of Science & Technology of China, Hefei 230026, China 2. Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China |
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Abstract The multi-axis differential optical absorption spectroscopy (MAX-DOAS), one of the remote sensing techniques for trace gases measurements, is sensitive to the lower atmosphere by eliminating the influence of stratosphere retrieved from zenith-sky spectroscopy. Ground-based MAX-DOAS measurements were carried out to observe NO2 at Ny-lesund, Arctic from 5th Jul to 1st Aug 2011. The differential slant column densities (DSCDs) of NO2 at four off-axis angles showed typical pattern of tropospheric absorbers. Based on the assumption that NO2 was well mixed in 0~1 km of the troposphere, the mean mixing ratio of NO2 during the measurement period was 1.023E11 molec·cm-3. The fluctuation of NO2 might be related to the fossil fuel combustions and the photochemical reactions. The vertical distribution of NO2 at 0~3 km showed that NO2 was mainly originated from boundary layer of sea surface.
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Received: 2012-03-16
Accepted: 2012-06-10
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Corresponding Authors:
SUN Li-guang
E-mail: slg@ustc.edu.cn
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