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首页> 外文OA文献 >VARIATIONS OF ATMOSPHERIC CO_2 CONCENTRATION OVER SYOWA STATION, ANTARCTICA AND AIR TRANSPORT PROCESS
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VARIATIONS OF ATMOSPHERIC CO_2 CONCENTRATION OVER SYOWA STATION, ANTARCTICA AND AIR TRANSPORT PROCESS

机译：sYOWa站，南极洲和航空运输过程中大气CO_2浓度的变化

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摘要

Aircraft and ground-based measurements of the atmospheric CO_2 concentration have been made respectively at and over Syowa Station, Antarctica since January 1983. The minimum concentration of the average seasonal CO_2 cycle occurs in March throughout the troposphere and the maximum concentration appears in mid-August and late in September in the upper troposphere and in the lower and middle troposphere, respectively. The peak-to-peak amplitude of the cycle decreases slightly with height. The CO_2 concentration increases with height during most of the year and the height-dependent concentration difference is smaller from late winter to spring than in the remaining seasons. To interpret these variations of the CO_2 concentration, 3-dimensional trajectory analysis was done using U.S. NMC data. From the results obtained, it is suggested that the northern hemispheric air with high CO_2 concentration is transported to the Antarctic region through the upper troposphere from late fall to winter, while the air with low CO_2 concentration is transported from southern middle latitudes into the Antarctic region through the lower troposphere in the remaining seasons. These air transport processes are especially important for variations of the CO_2 concentration over the station.
机译：自1983年1月以来，分别在南极洲Syowa站及其上方进行了飞机和地面大气CO_2浓度的测量。平均季节性CO_2周期的最小浓度发生在整个对流层的3月，最大浓度出现在8月中旬对流层上部和对流层下部和中部分别在9月下旬和9月下旬。周期的峰峰幅度随高度而略有降低。在一年中的大部分时间里，CO_2的浓度会随着高度的增加而增加，并且从冬末到春季，随高度变化的浓度差异要小于其余季节。为了解释CO_2浓度的这些变化，使用美国NMC数据进行了3维轨迹分析。从获得的结果来看，建议从秋末到冬季，将高浓度CO_2的北半球空气通过对流层高层输送到南极地区，而将低浓度CO_2的空气从中南部纬度输送到南极地区。在其余季节穿过对流层低层。这些空气传输过程对于站内CO_2浓度的变化特别重要。

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