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SCI论文目录 |
Dynamics of profiles and storage of carbon dioxide in broadleaved/Korean forest in Changbai Mountain |
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| 出 版 社：Journal of Forestry Research |
| 发表时间：14(4): 275-279 (2003) |
| 台 站：
长白山森林生态系统定位研究站
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| 作 者：HAN Shi-jie1, LIN Li-sha, YU Gui-rui, ZHANG Jun-hui, WU Jia-bing, ZHO Xiao-song, GUAN De-xin |
| 点 击 率：7216 |
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| 关 键 字：CO2 concentration, CO2 profile, CO2 storage, Broadleaved/Korean pine forest, Vertical distribution,Concentration gradient |
| 摘 要：Abstract: CO2 concentrations at different heights in a broadleaved/Korean forest (with a mean height of 26 m) were measured
with infrared gas analyzer IRGA (model 2250D, LI-COR Inc. and LI-COR, 820) from Aug. to Oct. of 1999, Apr. to Jul. of 2000,
and from Aug. 2002 to Sept. 2003. Based on the collected dada, the diurnal and seasonal dynamics of profiles and storage of
carbon dioxide in the forest were analyzed. The diurnal CO2 profiles showed that the vertical distribution of CO2 concentration
were different for daytime and nighttime, and the CO2 concentration was highest close to forest floor, no matter at daytime and
nighttime. The seasonal profiles of CO2 showed that stratification in the canopy was evident during growth season. CO2
concentrations at different heights (60 m to 2.5 m) had a little change in March, with a difference of 10 mmol·mol-1, but had a
significant change in July, with a difference of 60 mmol·mol-1. In July, there also existed a greater gradient of CO2 concentrations
at canopy (22, 26 and 32 m), with a difference of 8 mmol·mol-1. The calculated total storage (ΔC/Δt ) of CO2 in the air column
with height of 40 m beneath eddy covariance instrument was negative, and made a little contribution to NEE.
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