Five years of observations of ozone profiles over Lauder, New Zealand
Five years of observations of ozone profiles over Lauder, New Zealand
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新西兰劳德上空臭氧剖面五年观测
DOI：
10.1029/2001jd000737
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发表时间：
2002
影响因子：
--
通讯作者：
D. Swart
中科院分区：
文献类型：
--
作者：
E. Brinksma;J. Ajtić;J. Bergwerff;G. Bodeker;I. Boyd;J. D. Haan;W. Hogervorst;J. Hovenier;D. Swart
[1]本文介绍了利用激光雷达、臭氧探测仪和星载平流层气溶胶和气体实验（SAGE II）仪器对Lauder（45°S，170°E）上空臭氧（O3）的高度廓线进行的观测。这些数据是南半球为数不多的长期O3分布图之一。在所提供的5年数据中，主要的变化是年周期，27.5公里以下和27.5公里以上的年周期的相位和幅度不同。叠加的是由各种过程引起的不规则的幕式变化。研究的第一个过程是平流层-对流层交换，其特征是干燥和富含O3的空气居住在对流层，这是在21%的测量发现。第二个因素与劳德代尔上空较高极涡的位置有关，通常与中纬度和副热带平流层区域之间的空气交换有关。我们目前的例子，这是观察到的兰黛在1997年冬季。今年冬天被选为进一步研究，因为测得的O3含量创纪录低。第三个过程是低涡破裂后贫O3的低涡空气与中纬度空气的混合。我们提供了一个例子，它表明1997年11月27日左右，源自耗尽的南极涡旋的细丝显着降低了兰黛上空的O3含量。因此，有一个连接之间的南极O3耗尽和后来减少的O3量在南半球中纬度的位置，即劳德。
[1] Altitude profiles of ozone (O3) over Lauder (45°S, 170°E) performed using a lidar, ozonesondes, and the satellite-borne Stratospheric Aerosol and Gas Experiment (SAGE II) instrument are presented. These data form one of the few long-term sets of O3 profiles at a Southern Hemisphere location. In the 5 years of data presented, the dominant variation is the annual cycle, the phase and amplitude of which differ below and above 27.5 km. Superposed are irregular episodic variations, caused by various processes. The first process studied is stratosphere-troposphere exchange, characterized by dry and O3-rich air residing in the troposphere, which was found in 21% of the measurements. The second relates to the positioning of the higher polar vortex over Lauder, often in combination with the exchange of air between midlatitude and subtropical stratospheric regions. We present examples of this which were observed over Lauder during the 1997 winter. This winter was selected for further study because of the record-low O3 amounts measured. The third process is mixing of O3-depleted vortex air with midlatitude air after the vortex breakup. We present one example, which shows that a filament originating from the depleted Antarctic vortex significantly lowers O3 amounts over Lauder around 27 November 1997. There is thus a connection between Antarctic O3 depletion and later decrease of O3 amounts at a Southern Hemisphere midlatitude location, namely Lauder.
影响因子：
4.4
作者：
Bodeker, GE;Boyd, IS;Matthews, WA
通讯作者：
Matthews, WA