The temporal evolution of the ratio HNO3/NOy in the Arctic lower stratosphere from January to March 1997
The temporal evolution of the ratio HNO3/NOy in the Arctic lower stratosphere from January to March 1997
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1997年1月至3月北极低平流层HNO3/NOy比值随时间的演变
DOI：
10.1029/1999gl900184
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
O. Bujok
中科院分区：
文献类型：
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作者：
J. Schneider;F. Arnold;J. Curtius;B. Sierau;H. Fischer;P. Hoor;F. Wienhold;U. Parchatka;Y. C. Zhang;H. Schlager;H. Ziereis;C. Feigl;J. Lelieveld;H. A. Scheeren;O. Bujok
1997年1月（POLSTAR I）和3月（STREAM III）在北极平流层下部进行了HNO 3，NOy，N2 O和O3的飞机测量。这两个项目采用了不同的飞机平台。此外，在两个活动中使用不同的仪器测量NOy和O3。HNO 3和NOy被发现具有很强的相关性，相关系数分别为0.84（POLSTAR I）和0.69（STREAM III）。HNO 3在NOy中的比例从1月份的96%下降到3月份的59%。这种减少与极地日出后光解产生的HNO 3的寿命一致。NOy和HNO 3与N2 O的关系表明，1月份NOy和HNO 3值明显高于预期，这可能表明PSC-II颗粒沉降和蒸发的硝化作用。矛盾的是，1月份观察到的NOy/O3比值仅略有升高。在3月，NOy-N2 O和NOy-O3关系与文献中报道的其他关系吻合良好。NOy-O3和NOy-N2 O关系之间的差异部分解释为1月至3月期间观测到的O3下降约30%。
Aircraft‐based measurements of HNO3, NOy, N2O, and O3 have been performed in the Arctic lower stratosphere in January (POLSTAR I) and March (STREAM III) of 1997. The two projects employed different aircraft platforms. In addition, NOy and O3 were measured using different instruments in the two campaigns. HNO3 and NOy were found strongly correlated with correlation coefficients of 0.84 (POLSTAR I) and 0.69 (STREAM III), respectively. The fraction of HNO3 within NOy decreased from 96% in January to 59% in March. The decrease is consistent with the lifetime of HNO3 due to photolysis after polar sunrise. The relationship of NOy and HNO3 with N2O shows that in January NOy and HNO3 values were markedly higher than expected, which may indicate nitrification by PSC‐II particle sedimentation and evaporation. Contradictory, the ratios NOy/O3 observed in January are only slightly elevated. In March, NOy‐N2O and NOy‐O3 relations agree well with others reported in the literature. The difference between the NOy‐O3 and NOy‐N2O relationships is partly explained by an observed O3 decrease of about 30% between January and March.