Redistribution of reactive nitrogen in the Arctic lower stratosphere in the 1999/2000 winter

被引:15
作者
Koike, M
Kondo, Y
Takegawa, N
Lefevre, F
Ikeda, H
Irie, H
Hunton, HDE
Viggiano, AA
Miller, TM
Ballenthin, JO
Sachse, GW
Anderson, BE
Avery, M
Masui, Y
机构
[1] Univ Tokyo, Dept Earth & Planetary Sci, Grad Sch Sci, Bunkyo Ku, Tokyo 1130033, Japan
[2] Univ Tokyo, Adv Sci & Technol Res Ctr, Tokyo 1538904, Japan
[3] Inst Pierre Simon Laplace, Serv Aeron, F-75252 Paris 05, France
[4] Natl Inst Environm Studies, Satellite Remote Sensing Res Team, Tsukuba, Ibaraki 3058506, Japan
[5] USAF, Res Lab, Space Vehicles Directorate, Bedford, MA 01731 USA
[6] NASA, Langley Res Ctr, Hampton, VA 23681 USA
关键词
reactive nitrogen; NOy; Arctic; ozone; denitrification; nitrification;
D O I
10.1029/2001JD001089
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
Total reactive nitrogen (NOy) in the Arctic lower stratosphere was measured from the NASA DC-8 aircraft during the SAGE III Ozone Loss and Validation Experiment (SOLVE) in the winter of 1999/2000. NOy-N2O correlations obtained at altitudes of 10-12.5 km in December 1999 and January 2000 are comparable to the reported reference correlation established using the MkIV balloon measurements made during SOLVE prior to the onset of denitrification. Between late February and mid-March, NOy values obtained from the DC-8 were systematically higher than those observed in December and January by up to 1 part per billion by volume, although a compact correlation between NOy and N2O was maintained. Greater increases in NOy were generally observed in air masses with lower N2O values. The daily minimum temperatures at 450-500 K potential temperature (similar to20-22 km) in the Arctic fell below the ice saturation temperature between late December and mid-January. Correspondingly, intense denitrification and nitrified air masses were observed from the ER-2 at 17-21 km and below 18 km, respectively, in January and March. The increases in NOy observed from the DC-8 in late February/March indicate that influence from nitrification extended as low as 10-12.5 km over a wide area by that time. We show in this paper that the vertical structure of the temperature field during the winter was a critical factor in determining the vertical extent of the NOy redistribution. Results from the Reactive Processes Ruling the Ozone Budget in the Stratosphere (REPROBUS) three-dimensional chemistry transport model, which reproduced the observed general features only when the NOy redistribution process is included, are also presented.
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页数:16
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