The annual variation of atmospheric CO2 concentration observed in the northern hemisphere
The annual variation of atmospheric CO2 concentration observed in the northern hemisphere
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DOI：
10.1029/jc086ic10p09839
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发表时间：
1981-10
影响因子：
--
通讯作者：
G. Pearman;P. Hyson
中科院分区：
文献类型：
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作者：
G. Pearman;P. Hyson
对莫纳罗亚、巴罗角和天气船P的大气二氧化碳浓度的年变化记录进行了长期变化的检查。近年来，年变化的幅度似乎有所增加，根据莫纳罗亚的数据，对变化速度的最佳估计为0.45+-0.42%年/超-1/年。这种变化从生物圈呼吸作用和光合作用的变化以及化石燃料的使用方面进行了讨论。该分析不允许将幅度变化的几个可能原因分开。然而，如果这种变化被解释为反映了生物圈增长的增强，其影响相当于1959-1978年夏季净碳吸收的8%变化，以及北半球季节性生物圈每年0.5x10/sup 12/kg碳的增长。这一结论与最近的清单研究相一致，这些研究表明，近几十年来，温带森林每年净吸收约10/超12/公斤的碳。
Records of the annual variation of the atmospheric carbon dioxide concentration at Mauna Loa, Point Barrow, and Weathership P are examined for secular changes. The amplitude of the annual variation appears to have increased in recent years with a best estimate of the rate of change, based on the Mauna Loa data, of 0.45 +- 0.42% yr/sup -1/. This change is discussed in terms of changes in biospheric respiration and photosynthesis and the use of fossil fuels. The analysis does not allow for the separation of several possible causes of amplitude change. However, if the change is interpreted as reflecting enhanced biospheric growth, the effect is equivalent to a 8% change in the net summer uptake of carbon over the years 1959-1978 and to a growth of the northern hemisphere seasonal biosphere of 0.5 x 10/sup 12/ kg of carbon per year. Such a conclusion is consistent with recent inventory studies, which indicate that temperature zone forests have acted as a net sink of about 10/sup 12/ kg of carbon per year in recent decades.