收稿日期: 2003-01-06
修回日期: 2003-05-16
网络出版日期: 2004-04-01
基金资助
科技部国际合作重点项目“国际合作南极冰盖内陆考察和冰芯研究”（编号：2001CB711003）；科技部社会公益项目“南极地区地球环境监测与关键过程研究” （编号:2001DIA50040）；西北师范大学知识与科技创新工程项目“西北地区对全球变化的影响及生态恢复重建研究”（编号：NWNU-CJCXGC-02-20）资助
ROGRESS IN THE STUDY OF NO-3 CONCENTRATIONS RECORDED IN ANTARCTIC ICE SHEETS
Received date: 2003-01-06
Revised date: 2003-05-16
Online published: 2004-04-01
秦大河 , 康建成 , 孙俊英 , 李忠勤 , 张明军 , 效存德 , 任贾文 . 南极冰盖 NO-3 浓度记录研究进展[J]. 地球科学进展, 2004 , 19(2) : 275 -282 . DOI: 10.11867/j.issn.1001-8166.2004.02.0275
In recent years, much attention has focused on the atmospheric nitrogen cycle, the second major biogenic cycle. The study of the remote polar atmospheres may provide new and valuable data for the study of global atmospheric chemistry. Moreover, the chemical analysis of polar snow and ice has proved to be a very powerful tool in investigating polar atmospheric chemistry, In this paper, the latest progress of the possible causes of shortterm Antarctic NO-3variations, the possible sources, the postdepositional changes and the time and spatial changes of concentrations of NO-3 in the firn and ice of Antarctic ice sheet have been reviewed. The review indicates that although some solar proton events, galactic supernovae, Tunguska metor, volcanic eruptions and nuclear tests may influence the NO-3 concentrations in the firn and ice of Antarctic ice sheet, the lightening in the troposphere and the oxidation of N2O in the stratosphere are the main sources of the background of NO-3 in Antarctic ice sheet. The comprehensive research shows that the NO-3 concentrations recorded in the Antarctic ice sheet may be the results of the sources, transmission paths, depositional processes and postdepositional processes of NO-3 in Antarctic ice sheet. Therefore, in order to reveal the environmental meaning of NO-3 recorded in Antarctic ice sheet, great attentions should be given to a synthetical study of the sources, transmission paths, depositional processes and postdepositional processes of NO-3in Antarctic ice sheet.
Key words： Antarctica; Firn and ice; NO-3; Source; Time and spatial change.
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