Measurements of water vapor in the tropical lower stratosphere during the CEPEX Campaign: Results and interpretation
Measurements of water vapor in the tropical lower stratosphere during the CEPEX Campaign: Results and interpretation
复制标题
CEPEX 活动期间热带低平流层水汽测量：结果和解释
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
James G. Anderson
中科院分区：
文献类型：
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作者：
E. Weinstock;E. Hintsa;A. Dessler;James G. Anderson
我们目前的测量水蒸气使用快速响应莱曼α湿度计安装在美国宇航局ER-2的中赤道太平洋实验（CEPEX）在1993年3月和4月。这些航班从斐济（17 ° S，178 ° E）出发，覆盖了高达470 K的潜在温度范围。同时臭氧测量和1-D模式被用来转换潜在的温度在平流层中的空气的有效年龄。这项分析提供了深入了解在不同的季节在以前的飞机运动在热带平流层较低的测量水汽廓线。它产生的季节性周期的变化与热带对流层顶的平均温度和每年平均的混合比进入热带平流层的空气中的水约4.45 ppmv的一致的图片。
We present measurements of water vapor taken using a fast-response Lyman-alpha hygrometer mounted on the NASA ER-2 for the Central Equatorial Pacific Experiment (CEPEX) during March and April 1993. The flights originated from Fiji (17°S, 178°E) and covered a range of potential temperatures up to 470 K. Concurrent ozone measurements and a 1-D model are used to convert potential temperature to effective age of the air in the stratosphere. This analysis provides insight into measured water vapor profiles in the lower tropical stratosphere taken during different seasons on previous aircraft campaigns. It yields a picture of a seasonal cycle consistent with the variation of the average tropical tropopause temperature and an annually averaged mixing ratio of water in air entering the tropical stratosphere of about 4.45 ppmv.