Investigation of Arctic ozone depletion sampled over midlatitudes during the Egrett campaign of spring/summer 2000
Investigation of Arctic ozone depletion sampled over midlatitudes during the Egrett campaign of spring/summer 2000
复制标题
2000 年春/夏白鹭活动期间对中纬度地区采样的北极臭氧消耗情况的调查
DOI：
--
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
R. Busen
中科院分区：
文献类型：
--
作者：
D. E. Ross;J. Pyle;N. Harris;J. Mcintyre;G. Millard;A. Robinson;R. Busen
抽象。在2000年5月至6月期间，使用澳大利亚高空研究飞机Grob G520 T Egrett，使用GC仪器（DIRAC）获得了一个独特的卤化碳数据集，该仪器以前曾部署在气球平台上。卤烃数据一般显示出良好的线性关系与臭氧数据同时获得的商业传感器。2000年6月5日，在380 K，白鹭进入英国上空的高纬度空气舌。在飞行中获得的CFC-11和O3数据显示了这一特征的证据。该数据集已被用来，结合三维化学传输模型，推断臭氧消耗中纬度低平流层飞行期间遇到的。我们计算出，臭氧消耗的20%，相对于其冬季值在较高的纬度气团。模式中的一套臭氧损失示踪剂已被用来跟踪臭氧消耗，根据位置相对于涡旋和化学循环负责。该模型于12月9日初始化，表明6月份中纬度地区臭氧化学破坏总量的50%发生在90-70°N等效纬度带，70%是由于卤素化学。
Abstract. A unique halocarbon dataset has been obtained using the Australian high altitude research aircraft, the Grob G520T Egrett, during May-June 2000 with GC instrument (DIRAC), which has been previously deployed on balloon platforms. The halocarbon data generally shows a good anticorrelation with ozone data obtained simultaneously from commercial sensors. On 5 June 2000, at 380K, the Egrett entered a high latitude tongue of air over the U.K. CFC-11 and O3 data obtained on the flight show evidence of this feature. The dataset has been used, in conjunction with a 3D chemical transport model, to infer ozone depletion encountered in the midlatitude lower stratosphere during the flight. We calculate that ozone is depleted by 20% relative to its winter value in the higher latitude airmass. A suite of ozone loss tracers in the model have been used to track ozone depletion according to location relative to the vortex and chemical cycle responsible. The model, initialised on 9 December, indicates that 50% of the total chemical ozone destruction encountered in June in the middle latitudes occurred in the 90-70°N equivalent latitude band and that 70% was due to halogen chemistry.