Concentration variations of atmospheric CO2 observed at Syowa Station, Antarctica from 1984 to 2000
Concentration variations of atmospheric CO2 observed at Syowa Station, Antarctica from 1984 to 2000
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DOI：
10.3402/tellusb.v55i2.16767
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发表时间：
2003-01
期刊：
影响因子：
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通讯作者：
S. Morimoto;T. Nakazawa;S. Aoki;G. Hashida;T. Yamanouchi
中科院分区：
文献类型：
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作者：
S. Morimoto;T. Nakazawa;S. Aoki;G. Hashida;T. Yamanouchi
自1984年2月以来，在南极洲的Syowa站对大气CO2浓度进行了系统和连续的测量。1995年更新了测量系统，但通过同时操作这两个系统来确认数据的连续性。从1984年到2000年的17年的CO2数据显示出明显的季节性周期、长期趋势和年际变化的证据。季节性周期是可变的，从一年到一年，特别是更大的振幅在1992年和1998年和1993年的大相位延迟。1987年、1994年和1998年观测到与厄尔尼诺/南方涛动事件有关的CO2浓度迅速增加。过去17年CO2长期增长的平均速率计算为1.49 ppmv yr-1。在1990年后的几年中，在南极夏季发现了幅度约为1.0 ppmv的短期CO2变化，这可能是由于贫CO2的气团侵入南极地区。
Systematic and continuous measurements of the atmospheric CO2 concentration have been carried out at Syowa Station, Antarctica since February 1984. The measurement system was renewed in 1995, but the continuity of the data from the two systems was confirmed by operating them simultaneously. The CO2 data taken for 17 years from 1984 to 2000 showed clear evidence for a seasonal cycle, a secular trend and interannual variations. The seasonal cycle was variable from year to year, with especially larger amplitudes in 1992 and 1998 and a large phase delay in 1993. A rapid increase in the CO2 concentration was observed in 1987, 1994 and 1998 in association with ENSO events. The average rate of the secular CO2 increase for the last 17 years was calculated to be 1.49 ppmv yr−1. Short-term CO2 variations with amplitudes of around 1.0 ppmv were found in the austral summer season of several years after 1990, probably due to an intrusion of CO2-depleted air mass into the Antarctic region.