Turbulent exchange of CO2 over a broadleaf-Korean pine forest in Changbai Mountain, northeast China
Turbulent exchange of CO2 over a broadleaf-Korean pine forest in Changbai Mountain, northeast China
复制标题
中国东北长白山阔叶红松林二氧化碳湍流交换
DOI：
10.1007/s11461-008-0066-z
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发表时间：
2008-07
期刊：
影响因子：
--
通讯作者：
Dexin Guan
中科院分区：
文献类型：
--
作者：
Xiaoming Sun;Jiabing Wu;Dexin Guan
利用开放路径涡度相关技术对长白山阔叶红松林大气CO2湍流交换进行了连续观测。结果表明，在近中性大气层结的情况下，在惯性子范围内测量的森林冠层上方的CO2和垂直风分量遵循预期的−2/3幂律。垂直涡的优势尺度约为100 m。涡动对CO2通量贡献的频率范围主要在0.01-2.0 Hz之间。冠层低频大涡对CO2通量的贡献大于小涡。开放路径涡度相关系统能够满足对林冠层湍流通量的估算，但由于非湍流过程的增加，夜间森林与大气之间的CO2通量普遍被低估，表明弱湍流下估算的CO2通量需要进行相应的修正。
Turbulent exchange of CO2 was measured continuously via the open-path eddy covariance technique over a broadleaf-Korean pine forest in Changbai Mountain, northeast China. The results show that with near-neutral atmospheric stratification, CO2 and vertical wind components measured over the forest canopy in the inertial sub-range followed the expected −2/3 power law. The dominant vertical eddy scale was about 100 m. The frequency ranges of eddy contributions to CO2 fluxes were mostly within 0.01–2.0 Hz. Large eddies with low frequency over the canopy contributed more to CO2 fluxes than small eddies. The open-path eddy covariance system could satisfy the estimation of turbulent fluxes over the canopy, but the CO2 fluxes between forest and atmosphere were generally underestimated at night because of the increment non-turbulent processes, suggesting that the CO2 fluxes estimated under weak turbulence need to be revised correspondingly.
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通讯作者：
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影响因子：
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影响因子：
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作者：
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