摘要
利用长江三角洲和东北平原地区大气本底站的二氧化硫(SO2)和氮氧化物(NOx)历史资料和近期取得的观测数据,探讨两个地区人为排放对这些气候相关酸性气体的不同贡献。从两种酸性气体过去和现在的浓度水平,估算了它们在两个地区的增长率,比较了NOx与SO2比值的不同变化趋势。结果表明,早在20世纪90年代中期,长江三角洲酸性气体污染水平已经较高,其后主要是NOx浓度显著升高,从而使该地区成为硫和氮污染并重的地区;东北平原酸性气体过去浓度很低,但这些气体以很高的速率增长,虽然目前浓度水平仍然比较低,但未来形势不容乐观。
Historic and recent observational data of SO2 and NOx from Lin＇an and Longfengshan background stations, located in the Yangtze Delta and the Northeast Plain region, respectively, are analyzed in order to study the differences in concentrations of these climate-relevant acidic gases between the two regions, and the impacts of anthropogenic emissions on the gases since about one decade ago. The past and more recent concentration levels of the gases are compared between the two sites, long-term changing trends of the gases at both sites are estimated, and the NOx/SO2 ratios for the two sites are obtained using the correlation method. The results show that as early as middle 1990s, concentration levels of SO2 and NOx have been considerably high already at the background station of the Yangtze Delta region, and since then anthropogenic emissions have caused a significant increase in NOx concentration, making NOx another major pollutant in addition to SO2. Data from Longfengshan station suggest that levels of acidic gases in the Northeast Plain region were originally very low in the past, and are still considerably low at present. However, levels of the two acidic gases in this less polluted region have increased at very high rates, therefore, the future levels of these gases in the region are not optimistic.
出处
《气候变化研究进展》
CSCD
2008年第4期195-201,共7页
Climate Change Research
基金
国家重点基础研究发展计划(973计划)项目(2005CB422202)
国家科技基础性工作专项资金项目(2005DKA31700-04)
人事部"高层次留学人才回国"项目
中国气象局多轨道业务建设项目"大气成分监测评估系统-反应性气体监测评估子系统"资助
关键词
气候相关酸性气体
二氧化硫
氮氧化物
人为排放
长江三角洲
东北平原
climate-relevant acidic gases
sulfur dioxide
nitrogen oxides
anthropogenic emission
Yangtze Delta
Northeast Plain
