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首页> 外文期刊>SOLA: Scientific Online Letters on the Atmosphere >Vertical Profiles and Temporal Variations of Greenhouse Gases in the Stratosphere over Syowa Station, Antarctica
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Vertical Profiles and Temporal Variations of Greenhouse Gases in the Stratosphere over Syowa Station, Antarctica

机译：南极Syowa站平流层中温室气体的垂直剖面和时间变化

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Stratospheric air sampling using balloon-borne cryogenic air samplers was conducted over Syowa Station, Antarctica in four austral summers between 1998 and 2013. The CH4 and N2O mole fractions decreased with increasing altitude due to chemical reactions and photodissociation in the stratosphere, and a compact positive correlation between CH4 and N2O was found in their vertical profiles. The vertical profiles of CO2 and SF6 mole fractions showed high values in the lower stratosphere, decreasing gradually with altitude, and then becoming almost constant at altitudes above 18 km. Stratospheric CO2 and SF6 above 18km over Antarctica increased secularly at the respective average rates of 1.82 ± 0.31 ppm yr?1 and 0.26 ± 0.01 ppt yr?1 during the study period. The CO2 and SF6 mole fractions increased in the Antarctic stratosphere, but were delayed 4.5 ± 0.5 and 5.6 ± 0.2 years, respectively, compared to the tropical troposphere. The secular increase in stratospheric CH4 was also detected by classifying the measured mole fractions in terms of the N2O depletion in the stratosphere.
机译：在1998年至2013年之间的四个南方夏季，使用气球式低温空气采样器对南极Syowa站进行了平流层空气采样。由于平流层中的化学反应和光解离作用，CH4和N2O摩尔分数随高度的增加而降低，并且紧凑型正值在CH4和N2O的垂直剖面中发现了相关性。在较低的平流层中，CO2和SF6摩尔分数的垂直剖面显示出较高的值，随高度逐渐减小，然后在18 km以上的高度变得几乎恒定。在研究期间，南极上空18公里以上的平流层CO2和SF6分别以平均年率1.82±0.31 ppm yr？1和0.26±0.01 ppt yr？1分别呈长期增加。与热带对流层相比，南极平流层中的CO2和SF6摩尔分数增加，但分别延迟了4.5±0.5年和5.6±0.2年。通过根据平流层中N2O的损耗对测得的摩尔分数进行分类，还可以检测到平流层CH4的长期增加。

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