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한국생태학회 / v.34, no.1, 2011년, pp.95-106 
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( CO2 flux in a cool-temperate deciduous forest (Quercus mongolica) of Mt. Nam in Seoul, Korea ) |
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| 초 록 |
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| The Namsan Ecological Tower Site based on a flux tower was equipped with eddy covariance and automatic opening/closing chamber systems to collect long-term continuous measurements of $CO_2$ flux, such as the net ecosystem exchange (NEE) and soil $CO_2$ efflux in a cool-temperate Quercus mongolica forest. The mean concentrations of atmospheric $CO_2$ ($705;mg/m^3$) during the summer were smaller than those measured ($770;mg/m^3$) during the winter. The mean $CO_2$ flux during the summer period was negative ($-0.34;mg;m^{-2};s^{-1}$), while that during the winter period was positive ($0.14;mg;m^{-2};s^{-1}$). $CO_2$ was deposited from the atmosphere to the surface in the summer. The daily mean value of soil $CO_2$ efflux increased from spring to summer. The seasonal pattern in the rate of soil $CO_2$ efflux tightly followed the seasonal pattern in soil temperatures. The $Q_{10}$ values for soil $CO_2$ efflux varied in a range from 2.12 to 3.26, and increased with increasing soil depth. The maximum value of total carbon uptake (i.e., NEE) during the growing season was $-8;g;CO_2m^{-2};day^{-1}$. At the same time, the rate of soil $CO_2$ efflux was $6.9;g;CO_2m^{-2};day^{-1}$. The amplitude of flux variations in NEE was approximately 14% larger than those in soil $CO_2$ efflux. These results suggest that in cool-temperate regions of the Korean peninsula, the forest ecosystem of Q. mongolica may have a larger atmospheric $CO_2$ uptake, due primarily to its high photosynthetic capacity and low ecosystem respiration. |
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| 키워드 |
| $CO_2$ flux;eddy covariance technique;Nam-San Ecological Tower Site (NSETS);net ecosystem exchange NEE;Quercus mongolica forest;soil $CO_2$ efflux; |
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Journal of Ecology and Field Biology / v.34, no.1, 2011년, pp.95-106
한국생태학회
ISSN : 1975-020X
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201110441049372)
언어 : 영어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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