地球信息科学学报 ›› 2013, Vol. 15 ›› Issue (5): 688-694.doi: 10.3724/SP.J.1047.2013.00688

• 地理空间分析综合应用 • 上一篇    下一篇

基于OMI数据的中国NO2时空分布与人类影响分析

李龙1,2, 施润和1,2, 陈圆圆1,2, 徐永明3, 白开旭1,2, 张颉4   

  1. 1. 华东师范大学地理信息科学教育部重点实验室, 上海 200241;
    2. 华东师范大学环境遥感与数据同化联合实验室, 上海 200241;
    3. 南京信息工程大学遥感学院, 南京 210044;
    4. 佛山市气象局, 佛山 528000
  • 收稿日期:2013-03-01 修回日期:2013-05-22 出版日期:2013-09-29 发布日期:2013-09-29
  • 通讯作者: 施润和(1979-),男,副教授,硕导,现从事定量遥感模型与验证研究。E-mail:rhshi@geo.ecnu.edu.cn E-mail:rhshi@geo.ecnu.edu.cn
  • 作者简介:李龙(1988-),男,硕士生,主要从事大气环境遥感研究。E-mail:lilong9996@gmail.com
  • 基金资助:

    上海市科委世博专项(10DZ0581600);国家重点基础研究发展计划项目(2010CB951603);国家自然科学基金项目(41201358)

Spatio-temporal Characteristics of NO2 in China and the Anthropogenic Influences Analysis Based on OMI Data

LI Long1,2, SHI Runhe1,2, CHEN Yuanyuan1,2, XU Yongming3, BAI Kaixu1,2, ZHANG Jie4   

  1. 1. Key Laboratory of Geographic Information Science, Ministry of Education, East China Normal University, Shanghai 200241, China;
    2. Joint Laboratory for Environmental Remote Sensing and Data Assimilation, ECNU and CEODE, Shanghai 200241, China;
    3. College of Remote Sensing, Nanjing University of Information Science & Technology, Nanjing 210044, China;
    4. Foshan Bureau of Meteorology, Foshan 528000, China
  • Received:2013-03-01 Revised:2013-05-22 Online:2013-09-29 Published:2013-09-29

摘要:

近年来,空气质量不断恶化,严重威胁人类身体健康。二氧化氮(NO2)作为人类排放的重要污染物之一,实时监测其时空分布及含量,对空气质量研究及公众安全预警具有重要意义。本研究利用搭载在AURA卫星上的OMI(Ozone Monitoring Instrument)传感器反演获取的2005年1月至2010年12月中国区的NO2数据,探究了NO2的时空分布特征及其人类影响。结果表明:中国NO2浓度上升趋势显著,6年来总NO2柱浓度(TotNO2)和对流层柱浓度(TropNO2)净增值分别为0.61×1015 molec/cm2和0.63×1015 molec/cm2,年均增长率为2.47%和5.69%;全国绝大部分地区NO2浓度呈增长趋势,但增长速率在空间上有所差异,表现为东部沿海地区大于西部欠发达地区。在全国尺度上,NO2呈现显著的时空分布差异特征:空间上,总体呈东高西低态势;时间上,东部地区的NO2浓度冬季明显高于夏季,西部地区则相反。最后,对比分析了TropNO2/TotNO2与人类足迹的相关性,结果显示二者间呈显著相关,且冬季最大,夏季最小。同时,分析发现各地地区生产总值和全国汽车保有量与对流层NO2间呈较强相关性。表明人类活动和经济发展是导致大气中NO2增多的主要原因。

关键词: 人类影响, OMI, NO2, 时空分布

Abstract:

Recently, the air quality is deteriorating continuously, do serious harm to human health. As one of the major primary pollutants produced by human activities, real-time monitoring of the spatio-temporal characteristics of NO2 and its content can make a big difference to the air quality studies and public safety warning. This research studied the OMNO2e data between January 2005 and December 2010 from the Ozone Monitoring Instrument and the human society factors in China, explored the spatio-temporal characteristics of NO2 in China and the anthropogenic influences on it. The results showed that: the average NO2 column concentration in China has a significant upward trend from 2005 to 2010, the total column concentration in the atmosphere increased by 0.61×1015 molec/cm2, with an average annual growth rate of 2.47%; while the tropospheric column concentration increased by 0.63×1015 molec/cm2, with an average annual growth rate of 5.69%. The NO2 column concentration in most areas of China increased rapidly, and the growth rate in eastern China was much greater than the less developed regions in western China. The spatial distribution of NO2 in China also shows a significant difference. In general, it presents the characteristic of higher in the east than that in the west. Besides, NO2 column concentration in winter was significantly higher than that in summer in eastern China, but in western, the highest value appears in summer. We also studied the relationship between every season's spatial distribution of TropNO2/Tot-NO2 and the human footprint. The result showed a good consistency between them: the correlation coefficients between TropNO2/TotNO2 and human footprint is maximum in winter, about 0.59; and its minimum value appears in summer, about 0.48. And the number of samples is 56166×2, indicated that the influences from human activities were maximal in winter and minimum in summer. The correlation coefficients between car ownership and TropNO2, gross regional production and TropNO2 had also been calculated. We found that the coefficient between car ownership and TropNO2 is 0.95, with a significance test at 95 percentile of confidence level, and the correlation between gross regional production and TropNO2 also very strong. The increasing of NO2 in China has remarkable relevance with human activities and social economic development.

Key words: anthropogenic influences, OMI, NO2, spatio-temporal distribution