Correlations between tropopause height and total ozone: Implications for long‐term changes
Correlations between tropopause height and total ozone: Implications for long‐term changes
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DOI：
10.1029/98jd01929
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发表时间：
1998-08
影响因子：
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通讯作者：
W. Steinbrecht;H. Claude;U. Köhler;K. Hoinka
中科院分区：
文献类型：
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作者：
W. Steinbrecht;H. Claude;U. Köhler;K. Hoinka
对于霍恩派森贝格（Hohenpeissenberg）中欧观测站，按对流层顶高度分组的臭氧廓线平均值表明，平流层下部的臭氧混合比廓线随对流层顶上下移动。这种移动在对流层顶附近最大，在20至25公里以上可忽略不计。因此，对流层顶较高与总臭氧量较低相关，对流层顶较低则与总臭氧量较高相关。无论季节如何，对流层顶高度每增加1公里，总臭氧量减少16个多布森单位（DU）。在霍恩派森贝格，过去30年里对流层顶每10年上升150±70米（2σ）。如果总臭氧量和对流层顶高度之间每公里 -16 DU的相关性在年时间尺度上成立，那么据推测，观测到的对流层顶高度上升可以解释观测到的总臭氧量每10年 -10 DU下降的约25%。这与当前平流层模型难以解释的中纬度臭氧损耗的30%比例处于同一数量级。对于霍恩派森贝格来说，对流层顶高度的上升似乎与观测到的对流层变暖相关：例如，自1967年以来，在5公里高度处，温度每10年上升了0.7±0.3 K（2σ）。
For the central European station of Hohenpeissenberg, averaging of ozone profiles grouped by tropopause height shows that the ozone mixing ratio profile in the lower stratosphere shifts up and down with the tropopause. The shift is largest near the tropopause and becomes negligible above 20 to 25 km. As a consequence a high tropopause is correlated with low total ozone and a low tropopause with high total ozone. Independent of season, total ozone decreases by 16 Dobson units (DU) per kilometer increase in tropopause height. At Hohenpeissenberg the tropopause has moved up by 150±70 m (2 σ) per decade over the last 30 years. If the −16 DU per kilometer correlation between total ozone and tropopause height is valid on the timescale of years, it is speculated that the observed increase in tropopause height could explain about 25% of the observed −10 DU per decade decrease of total ozone. This is of the same magnitude as the 30% fraction of midlatitude ozone depletion which current stratospheric models have difficulty accounting for. For Hohenpeissenberg the increase in tropopause height appears to be correlated with observed tropospheric warming: At 5 km altitude, for example, temperature has increased by 0.7±0.3 K per decade (2 σ) since 1967.