| 河口湿地近地面大气 CO2浓度日变化和季节变化 |
| 摘要点击 2925 全文点击 1888 投稿时间：2013-07-02 修订日期：2013-08-27 |
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| 中文关键词 近地面大气 CO2浓度 日变化 季节变化 闽江河口湿地 |
| 英文关键词 surface atmospheric CO2 concentration diurnal variation seasonal variation Minjiang River estuarine marsh |
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| 中文摘要 |
| 2011年12月~2012年11月对闽江河口湿地近地面大气CO2浓度（摩尔分数）进行观测，研究CO2浓度的日变化和季节变化特征，结果表明，闽江河口湿地近地面大气CO2浓度的日变化和季节变化都呈典型的“单峰型”，表现为“昼低夜高”和“夏低冬高”的规律，日变幅在16.96~38.30 μmol·mol-1之间. 春、夏、秋、冬这4个季节近地面大气CO2平均浓度分别为（353.74±18.35）、（327.28±8.58）、（354.78±14.76）和（392.82±9.71）μmol·mol-1，而年平均浓度为（357.16±26.89） μmol·mol-1. 闽江河口湿地近地面大气CO2浓度的日变化与温度、风速、光合有效辐射、总辐射等主要气象因子呈负相关关系（P<0.05），而1月近地面大气CO2浓度日变化与潮汐水位呈负相关，7月与潮汐水位呈正相关. |
| 英文摘要 |
| Characteristics of diurnal and seasonal variations of surface atmospheric CO2 concentration were analyzed in the Minjiang River estuarine marsh from December 2011 to November 2012. The results revealed that both the diurnal and seasonal variation of surface atmospheric CO2 concentration showed single-peak patterns, with the valley in the daytime and the peak value at night for the diurnal variations, and the maxima in winter and minima in summer for the seasonal variation. Diurnal amplitude of CO2 concentration varied from 16.96μmol·mol-1 to 38.30 μmol·mol-1. The seasonal averages of CO2 concentration in spring, summer, autumn and winter were (353.74±18.35), (327.28±8.58), (354.78±14.76) and (392.82±9.71)μmol·mol-1, respectively, and the annual mean CO2 concentration was (357.16±26.89)μmol·mol-1. The diurnal CO2 concentration of surface atmospheric was strongly negatively correlated with temperature, wind speed, photosynthetically active radiation and total solar radiation(P<0.05). The diurnal concentration of CO2 was negatively related with tidal level in January, but significantly positively related in July. |
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