LARGE LOSSES OF TOTAL OZONE IN ANTARCTICA REVEAL SEASONAL CLOX/NOX INTERACTION
LARGE LOSSES OF TOTAL OZONE IN ANTARCTICA REVEAL SEASONAL CLOX/NOX INTERACTION
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DOI：
10.1038/315207a0
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发表时间：
1985-01-01
期刊：
影响因子：
64.8
通讯作者：
SHANKLIN, JD
中科院分区：
文献类型：
--
作者：
FARMAN, JC;GARDINER, BG;SHANKLIN, JD
最近尝试 1,2 使用 30° N 的一维模型来巩固人类活动对平流层臭氧 (O3) 影响的评估，结果表明至少在未来十年内总 O3 的扰动将保持较小。此类模型的结果通常被默认接受为全球估计3。通过观察发现，南极洲春季总 O3 值现已大幅下降，这一方法的不足之处显而易见。平流层下部的环流显然没有变化，必须考虑可能的化学原因。我们认为，从仲冬到春分后几周的极低气温使得南极平流层对无机氯 ClX 的增长特别敏感，主要是由于这种增长对 NO2/NO 比率的影响。结合极地平流层特有的紫外线照射高度分布，可以解释观测到的 O3 损失。
Recent attempts1,2to consolidate assessments of the effect of human activities on stratospheric ozone (O3) using one-dimensional models for 30° N have suggested that perturbations of total O3will remain small for at least the next decade. Results from such models are often accepted by default as global estimates3. The inadequacy of this approach is here made evident by observations that the spring values of total O3in Antarctica have now fallen considerably. The circulation in the lower stratosphere is apparently unchanged, and possible chemical causes must be considered. We suggest that the very low temperatures which prevail from midwinter until several weeks after the spring equinox make the Antarctic stratosphere uniquely sensitive to growth of inorganic chlorine, ClX, primarily by the effect of this growth on the NO2/NO ratio. This, with the height distribution of UV irradiation peculiar to the polar stratosphere, could account for the O3losses observed.