Short-term carbon dioxide exchange and environmental factors in a boreal fen
Short-term carbon dioxide exchange and environmental factors in a boreal fen
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北方沼泽中的短期二氧化碳交换和环境因素
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发表时间：
2000
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通讯作者：
A. Kettunen
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作者：
A. Kettunen
北方泥炭地是全球碳循环的重要贡献者。在寒冷和潮湿的气候条件下，北方泥炭地在过去的几千年里吸收了大量的大气碳（戈勒姆1991）。沼泽的碳平衡取决于光合作用和呼吸作用的速率，而光合作用和呼吸作用的速率又受到环境因素长期和短期变化的影响。到目前为止，更多的重点放在沼泽的年度碳平衡，短期动态受到的关注较少。然而，已经提出了二氧化碳和甲烷循环之间的关系，因为新的光合碳为产甲烷底物提供底物并促进甲烷排放（WHITING & CHANTON 1993）。为了分析绿色植物光合作用和甲烷排放之间的联系，我们需要分析二氧化碳交换的短期动态。因此，我们使用早期的数据（ALM等，1997年）来研究昼夜模式和计算每日的二氧化碳平衡在不同的微型站点的北方沼泽。
Northern peatlands are important contributors to the global carbon cycle. In cold and moist climatic conditions, boreal peatlands have sequestered large amounts of atmospheric carbon during the past few thousand years (GORHAM 1991). The carbon balance in mires depends on the rates of photosynthesis and respiration which are affected by both the long-term and the short-term variations in environmental factors. So far, more emphasis has been put on the annual carbon balance of mires, and short-term dynamics have received less attention. However, a relationship between the carbon dioxide and methane cycling has been proposed as newly photosynthesized carbon provides substrates for methanogenesis substrates and promotes methane emissions (WHITING & CHANTON 1993). To analyze the connection between green plant photosynthesis and methane emissions, we need to analyze the short-term dynamics of carbon dioxide exchange. Consequently, we use earlier data (ALM et al. 1997) to study the diurnal patterns and calculate the daily carbon dioxide balances in different microsites of a boreal fen.