青海省瓦里关地区近十年来大气本底化学组分的变化特征
THE VARIATION CHARACTERISTICS OF ATMOSPHERIC BACKGROUND CHEMICAL COMPONENT IN RECENT 10 YEARS OVER Mt. WALIGUAN OF QINGHAI PROVINCE
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摘要: 利用1994年至2005年青海省瓦里关地区连续监测的大气CO2浓度、O3总量、近地面O3浓度,以及1991年至2004年和1990年至2004年气瓶采样的大气CH4浓度和CO浓度的资料,分析了大气中化学组分近十年来的变化特征.结果表明:瓦里关地区大气中CO2浓度明显呈逐年增加的趋势,年平均增长率约为1·87μmol·mol-1·a-1,且具有明显的季节变化;大气中O3总量表现为复杂的年际变化和稳定的下降趋势;地面O3浓度具有明显的季节变化且呈缓慢的上升趋势;大气中CH4浓度也呈逐年上升的趋势;大气中CO的浓度变化不明显.Abstract: Based on the continuous data of atmospheric CO2, total O3and surface O3observed at MtWaliguan in 1994-2005 as well as the CH4 and CO data sampled in 1991-2004 and 1990-2004,respectively The variation characteristics of atmospheric component in recent 10 years are analyzed The result shows that the atmospheric CO2concentration over Mt.Waliguan has a significant increasing trend In 10 years, the averaged growth rate of atmospheric CO2 is about 1.87μmol·mol-1·a-1, and it has a significant seasonal variation; the atmospheric total O3 shows a complex inter annual variation and stable decreasing trend; the surface O3 has a distinct seasonal variation and keep ascending; the atmospheric CH4 also shows an ascending trend yearly, but the variation of atmospheric CO is not evident.
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Key words:
- MtWaliguan /
- atmosphere /
- CO2 /
- CO /
- O3 /
- CH4
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