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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >HEMISPHERIC ASYMMETRIES AND SEASONAL VARIATIONS OF THE LOWERMOST STRATOSPHERIC WATER VAPOR AND OZONE DERIVED FROM SAGE II DATA
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HEMISPHERIC ASYMMETRIES AND SEASONAL VARIATIONS OF THE LOWERMOST STRATOSPHERIC WATER VAPOR AND OZONE DERIVED FROM SAGE II DATA

机译：SAGE II资料推导出的低层平流层水汽和臭氧的半球不对称性和季节变化

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摘要

The distributions of water vapor and ozone in the lowermost stratosphere, the part of the stratosphere between the tropopause and the 380-K potential temperature surface, are examined using the Stratospheric Aerosol and Gas Experiment II measurements for the period of March 1989 to February 1990. The monthly mean values of water vapor and ozone are computed for the stratospheric portions of the 320-K and 350-K potential temperature surfaces for both hemispheres. We find a strong seasonal cycle in the water vapor mixing ratio on the 320-K potential temperature surface for both hemispheres, with maximum values in the summer season and minimum values in early spring. The seasonal cycle at the 350-K isentrope is similar to that at the 320 K but with a reduced amplitude. Comparisons with their distributions on the 420-K isentrope are made in order to explore information on stratosphere-troposphere exchange via the extratropical tropopause. Both water vapor and ozone data suggest that troposphere to stratosphere exchange across the extratropical tropopause has a significant influence on the lowermost stratosphere, especially for the northern hemisphere in the summer season. [References: 35]
机译：使用1989年3月至1990年2月的平流层气溶胶和气体实验II测量，研究了最平流层最低层，对流层顶与380-K潜在温度表面之间的平流层中水蒸气和臭氧的分布。针对两个半球的320-K和350-K潜在温度表面的平流层部分，计算水蒸气和臭氧的月平均值。我们发现两个半球在320-K的潜在温度表面上的水蒸气混合比具有很强的季节性周期，夏季的最大值在早春的最小值。 350-K等熵物的季节周期与320 K相似，但幅度减小。为了比较通过温带对流层顶平流层-对流层交换的信息，对它们在420-K同位素上的分布进行了比较。水蒸气和臭氧的数据均表明，穿过温带对流层顶的对流层到平流层的交换对最低层的平流层有重大影响，特别是在夏季的北半球。 [参考：35]

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