• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2002년도 추계학술대회 논문집
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• pp.430-431
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• 2002

기상변동에 대한 적절한 해석을 위하여 장기관측을 통한 다양한 지표 생태계에서의 수분 및 에너지 순환에 대한 연구가 진행(Grelle, et al., 1997: Wilson and Baldocchi, 2000)되고 있으며, 모형을 이용한 연구에서도 이에 대한 검증과 보다 정확한 자료의 산출을 위해서 양질의 관측자료가 절대적이라 할 수 있다. 또한 대기에 비하여 상대적으로 그 영향이 오래 지속되는 토양특성에 대한 정확한 토양수분 자료를 사용할 경우 기후 및 기상 예측의 정확도 향상에 크게 기여하는 것으로 알려져 있다(Atlas et al. 1993). (중략)

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2002년도 추계학술대회 논문집
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• pp.432-433
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• 2002

지표면은 일사 에너지를 다른 에너지로 변환하여 군락 및 대기 운동에 원동력을 제공한다. 산림과 대기 사이에서 발생하는 에너지 교환을 이해하기 위해서는 대기복사, 알베도, 나무온도, 잎면적 등에 관한 조사가 필수적이다. 특히 태양 복사의 측정은 지표와 대기에서의 에너지 수지에 관한 가장 정확한 측정방법중 하나이다(Cho et al., 2002). (중략)

• 한국대기환경학회지
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• 제19권3호
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• pp.285-296
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• 2003

The measurement of the radiation energy, trunk temperature, leaf area index (LAI), air temperature, vapor pres-sure, and precipitation has been conducted under a mixed forest at Kwangneung Arboretum during the period of 2001. Characteristics of the diurnal and seasonal variation of the radiative energy were investigated. The aerodynamic roughness length was determined as about 1.6 m and the mean albedo was about 0.1 The downward short-wave radiation was linearly correlated with the net radiation and its correlation coefficient was about 0.96. From this linear relation, the heating coefficient was calculated and its annual mean value was about 0.21 The albedo and heating coefficient was varied with season, surface characteristics, and meteorological conditions. The diurnal and seasonal variations of radiation energy were discussed in terms of the surface characteristics and meteorological conditions. In the daytime, during clear skies, net radiation was dominated by the shortwave radiation. In presence of clouds and fog, the radiation energy was diminished. At night, the net radiation was entirely dominated due to the net longwave radiation. There was no distinct diurnal variation in net radiation flux during the overcast or rainy days. The net radiation was strongest in spring and weakest in winter. The seasonal development in leaf area was also reflected in a strong seasonal pattern of the radiation energy balance. The timing, duration, and maximum leaf area and trunk temperature were found to be an important control on radiation energy budget. The trunk temperature was either equal or warmer than air temperature during most of the growing season because the canopy could absorb a substantial amount of sunlight. After autumn (after the middle of October), the trunk temperature was consistently cooler than air temperature.

• 한국미생물·생명공학회지
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• 제31권3호
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• pp.301-306
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• 2003

Twenty-one different fungi were tested for their ability to decolorize a wide range of structurally different dyes. Twenty fungal strains were isolated from fruiting bodies which were collected at the Kwangneung National Arboretum, Korea. One fungal strain were isolated from a rotting wood at Soongsil University, Korea. Nine kinds of dyes were used: three anthraquinone dyes and six azo dyes. The five fungal strains, Laetiporus sulphureus, Polyporus arcularius. Auricularia polytricha, Stereum ostrea, and Bjerkandera sp. UK-l showed decolorization ability. Except Auricularia polytricha, the four fungal strains were wood rotting fungi, and belonged to Aphyllophorales. Bjerkandera sp. UK-I, which was a white rot fungus, could decolorize all kinds of dyes tested in this study, indicating this fungus is one of candidates for applying in biological methods of dye waste treatment.

• 한국환경과학회:학술대회논문집
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• 한국환경과학회 2003년도 International Symposium on Clean Environment
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• pp.47-50
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• 2003

$CO_2$ concentration profile was measured to investigate whether $CO_2$ concentration at one level (i.e., eddy covariance measurement level) can be used to estimate storage term without significant uncertainty at broadleaf deciduous forest at Kwangneung experiment forest in Korea. Based on t-test with significance level of 5％, there was no statistical difference between storage term from one-level $CO_2$ concentration and one from $CO_2$ profile measurement. Storage term constitutes on average 5％ of half hourly net ecosystem exchange (NEE) even at unstable stability (i.e., well mixed condition), indicating that storage term should be considered even at daytime, which is sometimes neglected.

• The Korean Journal of Ecology
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• 제15권3호
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• pp.287-296
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• 1992

To determinate self-purification constants of pollutants loaded in the ecosystems, the self- purification process was formulated, and a measurement method of the self-purification constants was derived. $C=C_0e^{-st}$ When $C_0$ is the initial pollutant amounts loaded in a ecosystem, and C is the rest pollutant amounts after the time, t, the equation of the self-purification, s, is $s=\frac{P}{C}$ When in aquatic ecosystem, $C_0$ is the initial polluant amounts loaded in water body, and Cis the rest pollutation amounts after the time, t, the self-purification constant, s, is $s=(\frac{\ln C_0-\ln C}{t}$ Self-purification constants of pine and oak forests at kwangneung in kyonggido were 0.07 and 10 respectively, of BOD in gokneung stream in kyonggido was 0.51, and of glucose and phosphate in pools on the stone in mt.jiri were 0.49 and 15.19 respectively.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2002년도 Proceedings of International Symposium on Remote Sensing
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• pp.679-684
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• 2002

MODIS LAI has been one of key products for analyzing the quantitative aspects ofterrestrial ecology. This study was designed to validate MODIS LAS product by using the reference LAI map that was derived from both ground measurements and ETM＋ surface reflectance. The study area, the Kwangneung Experiment Forest in Korea, covers mixed species of deciduous and conifers of temperate forest. Throughout the growing season of 2002, we have measured LAS at the 30 sample plots using an optical device. Ground measured LAS data were then correlated to the ETM＋ reflectance to produce a continuous map of LAS over the study area. Preliminary comparison between MODIS LAI and the reference LAI map showed the lower LAI values from the MODIS product.

• 대한원격탐사학회지
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• 제19권1호
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• pp.1-9
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• 2003

MODIS LAI product has been one of key variable for analyzing the quantitative aspects of terrestrial ecology at global scale. This study was designed to validate MODIS global LAI product for regional application. To examine the quality of MODIS LAI data, we developed a reference LAI surface that was derived by relating the ground LAI measurements to Landsat ETM+ reflectance. The study area, the Kwangneung Experiment Forest in Korea, covers mixed deciduous and coniferous species of temperate forest. Ground measurements of LAI were conducted at 30 sample plots by using a photo-optical instrument during the growing season of 2002. Ground measured LAI data were then related to the ETM+ reflectance to produce a continuous map of LAI surface over the study area. From the comparison between the MODIS LAI and the reference LAI, it was found that the MODIS LAI values were slightly higher at the forestland. Considering the limitations of producing the reference LAI surface and the uncertainty of the input variable for the MODIS LAI algorithm, such small discrepancy mal not be significant.

• The Korean Journal of Ecology
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• 제16권4호
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• pp.515-526
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• 1993

한반도 남부 지역에 분포하는 아까시나무(Robinia pseudo-acacia L.)종자의 생태학적 형질변이를 추적하기 위하여, 북위34$^{\circ}$18'~38$^{\circ}$36'사이에 위치한 15개 지역(대진, 속초, 강릉, 수락산, 홍천, 광릉, 남한산성, 충주, 예산, 안동, 전주, 달성, 창원, 목포, 완도)을 선정하여 채종한 종자를 재료로, 단백질 패턴 및 정량 분석을 실시하였다. SDS-PAGE에 의한 단백질 패턴 분석결과, 전 지역데 걸쳐 총 35개의 밴드가 분리되었으며 최고 분자량은 142,232 daltons, 최저 분자량은 17,258 daltons였다. 분리된 단백질 밴드 수를 지역별로 비교한 결과, 대진, 속초가 32개로 가장 많은 반면, 홍천과 달성은 23개로 가장 적었으며, 대체로 고위도로 갈수록 증가하는 경향을 나타냈다. 각 단백질 밴드의 유무에 따라 지역에 따른 단백질 패턴의 차이를 비교해 본 결과, 중북부 동해안형(대진, 속초, 강릉)과 중부형(수락산, 홍천, 광릉, 남한산성, 충주) 및 남부형(에산, 안동, 전주, 달성, 창원, 목포, 완도)등 3가지 지역 유형이 구분되었다. 단백질 패턴의 지역간 유사도 지수(Jaccard 계수)를 근거로 UPGMAdp 의한 cluster analysis 결과, 중북부 등해안형(속초, 강릉), 중북부 I형(수락산, 홍천), 중북부 II형(남한산성, 충주, 대진), 중북부III형(광릉), 중남부형(예산, 달성, 전주) 및 남부형(안동, 창원, 목포, 완도)등 6개 유형이 식별되었다. 분리된 단백질 밴드 가운데, 모든 지역세어 No.12밴드(78,162daltons)가 가장 높은 염색 강도를 나타냈고, No.11.12.13.과No.23~28 밴드 역시 비교적 높은 염색강도를 보였다. 전체적으로 총 단백질 함량이 높은 창원, 목포, 완도 등 남부형 지역에서 특히 높은 염색 강도를 나타냈다. 총 단백질 함량은 각 지역별로 최저9.68mg/g(수락산)에서 최고17.30mg/g(전주)에 이르는 다양한 수치를 나타냈으며, 대체로 저위도로 갈수록 증가하는 경향을 보였다.

• The Korean Journal of Ecology
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• 제16권4호
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• pp.501-514
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• 1993

한반도 남부 지역에 분포하는 아까시나무(Robinia pseudo-acacia L.) 종자의 생태학적 형질 변이를 추적하기 위하여, 북위34$^{\circ}$18'~38$^{\circ}$36'사이에 위치한 15재역 (대진, 속초, 강릉, 수락산, 홍천, 광릉, 남한산성, 충주, 예산, 안동, 전주, 달성, 창원, 목포, 완도)을 선정하여 채종한 종자를 재료로, 발아 및 유식물 생장 실험을 실시하였다. 지역에 따른 발아 최적 온도는 저위도로 갈수록 높아지는 경향을 보여, 25$^{\circ}C$를 최적 온도로 하는 중북부형(대진, 속초, 강릉, 수락산, 홍천, 광릉)과 30$^{\circ}C$가 최적 온도인 중 남부형 (남한산성, 충주, 예산, 안동, 전주), 그리고 35$^{\circ}C$를 최적온도로 하는 남부형(달 성, 창원, 목포, 완도)의 3가지 유형이 식별되었다. 유식물의 신장 생장과 건량 새？에 대한 최적 온도는 모든 지역에서 25$^{\circ}C$로 나타났으나, 온도에 따른 생장 서열에 있어서 는 발아 경향과 유사한 경향을 보여 남부형(달성, 창원, 목포, 완도), 중남부형(남한산 성, 충주, 예산, 안동, 전주) 및 중북부형(대진, 속초, 강릉, 수락산, 홍천, 광릉)의 3가 지 유형이 식별되었다.