[MAX-DOAS measurements of NO2 column densities and vertical distribution at Ny-Alesund, Arctic during summer].
Guang Pu Xue Yu Guang Pu Fen Xi
; 32(9): 2336-40, 2012 Sep.
Article
em Zh
| MEDLINE
| ID: mdl-23240391
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-Alesund, 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 x 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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Base de dados:
MEDLINE
Idioma:
Zh
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
China