采用MAX-DOAS观测北极新奥尔松地区夏季NO_2的柱浓度与垂直分布  

MAX-DOAS Measurements of NO_2 Column Densities and Vertical Distribution at Ny-lesund,Arctic During Summer

作　　者：罗宇涵[1,2] 孙立广[1] 刘文清[2] 谢品华[2] 司福祺[2] 周海金[2] 

机构地区：[1]中国科学技术大学地球与空间科学学院极地环境研究室,安徽合肥230026 [2]中国科学院安徽光学精密机械研究所,安徽合肥230031

出　　处：《光谱学与光谱分析》2012年第9期2336-2340,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(40730107);极地专项(JDZX20110018);公益性行业(气象)科研专项(GYHY201106045)资助

摘　　要：多轴差分吸收光谱技术(MAX-DOAS)作为一种观测痕量气体成分的地基遥感手段,在反演过程中利用天顶谱扣除了平流层的影响,因而对底层大气的测定较为敏锐。采用地基被动MAX-DOAS在2011年7月5日—8月1日对北极新奥尔松地区的NO2柱浓度进行观测。观测期间4个离轴观测角的NO2差分斜柱浓度(DSCDs)结果显示,NO2主要集中在对流层底部。观测期间新奥尔松地区NO2的平均混合比为1.023E11molec.cm-3(0～1km),其含量的波动与轮船的化石燃料燃烧和大气光化学反应有关。3km内NO2的垂直分布图显示,NO2主要来自海洋边界层的释放,且随时间呈现波动变化。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.

关 键 词：NO2 对流层 MAX-DOAS 北极新奥尔松 垂直分布 

分 类 号：X821[环境科学与工程—环境工程]