摘要
臭氧是十分重要的痕量气体,它具有活跃的化学反应特性和较强的辐射特性,直接影响全球气候变化和人类的生活环境,因此,获得准确的臭氧柱浓度信息十分重要。搭载在AURA上的OMI探测仪可以测量大气中的臭氧含量,其获得的臭氧产品有两种,一个是基于TOMS V8算法反演得到的OMI-TOMS产品,另一个是由DOAS算法得到的OMI-DOAS产品。本文首先分析了两种算法产品的统计特征,结果表明两者具有较好的一致性;其次,分别分析了两种算法与像元位置的关系,在不受行异常现象影响的像元处,两种算法均不受像元位置的影响;此外,本文还研究了云和太阳天顶角对两种算法的影响,有云时两者的差异更大,云量在70%时两者的差异最大,而且,当有云存在时,两者的偏差随着太阳天顶角的增加而增加。平流层SO_2和吸收性气溶胶对两种算法没有显著影响。
Ozone is a significant trace gas in the atmosphere.It has both chemically and radiatively active characteristics,directly affecting global climate change and the Earth's environment.The OMI on board the AURA,uses both OMI-TOMS and OMI-DOAS algorithms to retrieve total ozone column(TOC).The purpose of this study is to produce a comparable result about the similarities and differences of the two algorithms in China.Firstly,this paper analyzes the statistical characteristics of the two algorithm products,and the results show that the two have good consistency.Secondly,the relationship between the two ozone products and the position of the pixel are analyzed separately.In the pixels that are not affected by the row-anomaly,both algorithms are not affected by the position of the pixel.In addition,the paper also studies the effects of cloud and solar zenith angle on the two algorithms.The difference between the two products is greater in cloudy pixels.When the cloud fraction is 70%,the difference reaches the largest amount.Moreover,the deviation in creases with the increase of the solar zenith angle in cloudy conditions,Stratospheric SO2 and absorbent aerosols have no significant effect on both algorithms.
作者
胡玥明
闫欢欢
张兴赢
孟晓阳
HU Yueming;YAN Huanhuan;ZHANG Xingying;MENG Xiaoyang(Chinese Academy of Meteorological Sciences,Beijing 100081;Nalional Satellite Meteorological Centre Beijing 100081)
出处
《气象》
CSCD
北大核心
2019年第3期362-370,共9页
Meteorological Monthly
基金
高分辨率对地观测系统重大专项应用共性关键技术项目(32-Y20A18-9001-15/17
05-Y20A16-9001-15/17
05-Y20A16-9001-15/17-3)
国家自然科学基金项目(41775028)
国家自然科学基金青年科学基金项目(41501413)共同资助
关键词
OMI-TOMS
V8
OMI-DOAS
中国
臭氧柱总量
云
太阳天顶角
OMI-TOMS V8(ozone monitoring instrument-total ozone mapping spectrometer V8)
OMIDOAS(ozone monitoring instrument-differetial optical absorption spectroscopy)
China
total ozone column
cloud
solar zenith angle
