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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >RE-FORMATION OF CHLORINE RESERVOIRS IN SOUTHERN HEMISPHERE POLAR SPRING
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RE-FORMATION OF CHLORINE RESERVOIRS IN SOUTHERN HEMISPHERE POLAR SPRING

机译：南方半球形极地氯气藏的改造

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This paper focuses on the recovery of chlorine reservoir species in the lower stratosphere in late Antarctic spring. The investigations are based on measurements from the Halogen Occultation Experiment (HALOE) on board the Upper Atmosphere Research Satellite (UARS) and calculations by the Mainz photochemical box model and the NASA Langley Research Center trajectory model. During late Antarctic spring 1994, HALOE observed high HCl mixing ratios up to 2.7 ppbv at 20 km altitude in the ozone-depleted air inside the polar vortex. These values correspond approximately to the sum of all available inorganic chlorine species. In the preceding period of chlorine activation on polar stratospheric clouds (PSCs), the observed HCl mixing ratios in some cases were below 0.3 ppbv. This indicates a fast conversion of active chlorine species into the form of HCl after PSCs disappear with increasing stratospheric temperatures. Box model calculations are presented that assess the rate of HCl increase in late spring when heterogeneous chemistry on polar stratospheric clouds becomes insignificant. The calculations were performed along Lagrangian trajectories starting from HALOE measurements in September 1994. Sensitivity calculations are presented regarding uncertainties in input parameters of the calculations. In the vortex edge region, calculated HCl increase rates are significantly lower compared with HALOE observations. Introducing additional HCl-yielding branches of the reactions of ClO with OH and HO2 helps to reduce this discrepancy. [References: 38]
机译：本文的重点是南极春季后期平流层下部氯气储集层物种的恢复。这些调查是基于上层大气研究卫星（UARS）上的卤素掩星实验（HALOE）的测量结果以及Mainz光化学箱模型和NASA Langley研究中心轨迹模型进行的计算得出的。在1994年南极春季末期，HALOE在极地涡流内的臭氧消耗空气中观察到在20 km的高HCl混合比高达2.7 ppbv。这些值大约对应于所有可用无机氯物质的总和。在极地平流层云（PSC）上氯活化的前期，在某些情况下观察到的HCl混合比低于0.3 ppbv。这表明，随着平流层温度的升高，PSC消失后，活性氯物种便迅速转变为HCl形式。当极地平流层云中的非均质化学变得无关紧要时，提出了箱型模型计算方法，用于评估后期春季HCl的增加速率。从1994年9月的HALOE测量开始，沿着拉格朗日轨迹进行了计算。给出了有关计算输入参数不确定性的灵敏度计算。在旋涡边缘区域，与HALOE观测值相比，计算得出的HCl增加速率明显更低。引入ClO与OH和HO2反应的额外的产生HCl的分支有助于减少这种差异。 [参考：38]

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