An assessment of southern hemisphere stratospheric NOx enhancements due to transport from the upper atmosphere
An assessment of southern hemisphere stratospheric NOx enhancements due to transport from the upper atmosphere
复制标题
对南半球平流层氮氧化物因高层大气输送而增强的评估
DOI：
10.1029/1999gl010940
复制
发表时间：
2000
影响因子：
5.2
通讯作者：
J. Russell
中科院分区：
文献类型：
--
作者：
D. Siskind;G. Nedoluha;Cora E. Randall;Michael Fromm;J. Russell
本文利用卤素掩星实验（HALOE）的资料，研究了高层大气NOx对平流层极涡的贡献。用甲烷和位涡作为示踪剂，一个孤立的区域增强的氮氧化物被证明是发生在南半球（SH）极涡几乎每年春天从1991年至1996年。这种增强的幅度根据Ap极光活动指数而变化。平流层中部SH极涡中多达一半的氮氧化物可能是由于粒子沉淀。峰值增强发生在1991年，幅度为3-5%的NOy，由于N2 O氧化源。
Data from the Halogen Occultation Experiment (HALOE) are used to evaluate the contribution of upper atmospheric NOx to the stratospheric polar vortex. Using CH4 and potential vorticity as tracers, an isolated region of enhanced NOx is shown to occur in the Southern Hemisphere (SH) polar vortex almost every spring from 1991–1996. The magnitude of this enhancement varies according to the Ap auroral activity index. Up to half of the NOx in the mid‐stratospheric SH polar vortex may be due to particle precipitation. The peak enhancement occurred in 1991 with a magnitude of 3–5% of the NOy, source due to N2O oxidation.