• Journal of Korean Society for Atmospheric Environment
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• v.7 no.1
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• pp.73-80
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• 1991

인류가 산업발전 등으로 인해 석유등 화석연료를 사용함에 따라 대기오염은 날로 악화되어 1952년 런던스모그 같은 참사를 맞이하였고 이에 각국은 이러한 대기 오염물질을 저감하기 위하여 노력한 결과 대기 오염물질은 낮아지고 있으나 이에 반해 이산화탄소 배출량 증가에 따른 지구 온난화 현상과 오존층 파괴는 지역적인 환경문제에서 번세계적인 환경문제로 확산 전개되고 있다. 특히 산업혁명후 화석연료의 급격한 사용증가로 인한 이산화탄소 배출량 증가는 지구를 온나화시키고 수십년 후에는 환경에 심각한 영향을 주게 되는 것은 의심할 여지가 없는 것으로 이는 지구환경문제 중에서 금회 최대의 과제로 대두되게 되었다. 이에 따라 1985년 UNEP 관리 이사회를 필두로 "지구환경보전에 관한 동경회의", "대기오염 및 기후변동에 관한 노드윅 회의", "백악관회의", "휴스톤 Summit" 등에서 이 문제가 거론되기 시작하여 '90. 8월에는 스웨덴에서 온난화에 대한 과학적 인식과 대책의 메카니즘을 정하기 위한 IPCC 4차 회의가 각국 대표들이 참석한 가운데 정치, 경제, 과학의 문제로 등장하여 우리생활의 근본을 좌우할 다각적인 논의가 진행된 바 있다. 또한 미국, 영국, 일본 등 선진국들의 정상이 모이는 G7 회담 등에서 논의되고 있는 것들 중 정치적인 문제를 제외하고는 환경문제를 가장 많이 다룬다는 외신보도를 우리는 여러번 접한바 있다. 현재 국제적 환경문제로 가장 관심이 집중되고 있는 문제 중 몇가지를 소개하면 우선 <몬트리올의 정서에 의한 오존층 보호>를 들 수 있겠고, 최근 국제 협약 제정을 추진하고 있는 "지구온난화 방지에 관한 기후협약" 그리고 유해폐기물의 국제교역에 관한 "바젤협약"과 함께 새로이 제기된 "생물학적 다양성 협약"등이 거론되고 있으며, 이에 덧붙여 미국의 "자동차배출가스 규제"도 우리나라 산업에 큰 영향을 미칠 것으로 판단된다. 본 논문은 이중 대기와 관련된 오존층 보호와 지구온난화 대책에 대한 국제회의 등에서 현재까지 논의되었거나 토의될 내용에 대하여 기술하고 특히 금년부터 집중적으로 국제협상이 진행될 지구온난화 문제에 대한 최근의 국제동향 우리나라의 입장을 기술하고자 한다.

• Journal of Korean Society of Forest Science
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• v.107 no.1
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• pp.43-49
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• 2018

This study was conducted to investigate the effects of warming and precipitation manipulation on seasonal changes in fine root production (FRP) and fine root mortality (FRM) of 33-month-old Pinus densiflora seedlings for two years. The seedlings in warmed plots were warmed with $3.0^{\circ}C$ higher using infrared heaters. The air temperature of warmed (TW) plots was set to increase by $3^{\circ}C$ compared to temperature control (TC) plots, and the three precipitation manipulation consisted of precipitation decrease (-30%; PD), precipitation increase (+30%; PI) and precipitation control (0%; PC). FRP ($mm\;mm^{-2}\;day^{-1}$) was significantly altered by only precipitation manipulation (PC: 3.57, PD: 4.59, PI: 3.02), while warming had no significant effect on the FRP and FRM. Meanwhile, interactions between warming and precipitation manipulation and seasonal changes had no significant effects on FRP and FRM. However, the influences of seasonal changes in soil temperature and soil moisture on FRP and FRM were different according to warming. In TW plots, FRP showed a positive relationship with soil temperature, and FRM showed a negative relationship with soil moisture. On the other hand, in the TC plots, FRP showed a positive relationship with soil moisture, and there were no relationships between FRM and soil temperature and moisture. These results indicate that the climate factors that affect FRP and FRM might vary as the warming progresses.

• Journal of Korea Water Resources Association
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• v.34 no.5
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• pp.511-519
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• 2001

Global warming has begun since the industrial revolution and it is getting worse recently. Even though the increase of greenhouse gases such as $CO_2$is thought to be the main cause for glogal warming, its impact on global climate has not been revealed clearly in rather quantitative manners. The objective of this research is to predict the hydrological environment changes in the Daechung Dam basin due to the global warming. A mesoscale atmospheric/hydrologic model (IRSHAM96 model) is used to predict the possible changes in precipitation and temperature in the Daechun Dam basin. The simulation results of IRSHAM96 model and a conceptual water balance model are used to analyze the changes in soil moisture, evapotranspiration and runoff in the Daechung Dam basin. From the simulation results using the water balance model for 1x$CO_2$and 2x$CO_2$situations, it has been found that the runoff would be decreased in dry season, but increased in wet season due to the global warming. Therefore, it is predicted that the frequency of drought and flood occurrences in the Daechung Dam basin would be increased in 2x$CO_2$condition.

• Korean Journal of Agricultural and Forest Meteorology
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• v.25 no.4
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• pp.276-283
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• 2023

Garlic (Allium sativum L.) is one of the most important vegetables used in various foods in Korea and many countries. The growth of garlic is influenced by various abiotic factors such as cultivation temperature, humidity, minimum temperature duration, and photoperiod. This study investigated the effects of increasing temperatures on the plant growth of the northern- ecotype garlic 'Uiseong' in a temperature gradient tunnel. As a result, temperature increase led to decreases in the bulb diameter, weight, and clove pieces of garlic. The rise of cultivation temperature increased the occurrence rate of incomplete bolting in the Northern-ecotype garlic 'Uiseong', resulting in decreases in productivity and a decrease in the yield of marketable garlic, indicating that temperature increases affect the development of garlic bulb formation. The findings of this study are expected to contribute as foundational data for understanding the growth responses of the northern-ecotype 'Uiseong' to increasing cultivation temperatures. The results of this study can be used to develop designing garlic growth models. In addition, the results of this study can improve understanding the interaction between increased temperature and garlic growth.

• Journal of the Korean earth science society
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• v.45 no.3
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• pp.239-259
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• 2024

In this study, a qualitative meta-analysis was conducted on research papers on earth science education to derive knowledge of students' understanding of specific science topics-greenhouse effect, global warming, and climate change-within the context of collective Pedagogical Content Knowledge (PCK). Twenty-two research papers addressing students' alternative conceptions (misconceptions) about these topics were selected and analyzed for their respective definitions, causes (mechanisms), and impacts. Semantic network analysis and a mental model framework were applied to synthesize the findings. The meta-analysis revealed several key insights: (1) Regarding the greenhouse effect, students often used the terms "greenhouse effect" and "global warming" interchangeably, lacked knowledge about the types of greenhouse gases, and misunderstood their roles. They commonly associated the greenhouse effect with environmental pollution or changes in the ozone layer, failing to recognize its relation to the heat balance between the surface and atmosphere. (2) Concerning global warming, students confused it with sea level rise and linked it to pollution, ozone layer changes, and glacier melting. They understood global warming as a disruption of the heat balance between the surface and atmosphere but had misconceptions about its environmental impacts. (3) In terms of climate change, students used the term interchangeably with global warming, weather change, and climate anomalies. They associated climate change with atmospheric pollution and ozone layer depletion but misunderstood its environmental impacts. As result, three mental models-categorical, mechanistic, and hierarchical misconceptions-were identified as collective PCK. The implications for enhancing earth science teachers' PCK were discussed based on these findings.

• Proceedings of the KAIS Fall Conference
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• 2002.11a
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• pp.235-237
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• 2002

지구상에서 일어나는 많은 환경문제 중 지구의 온난화 현상은 지구의 존폐를 가름할 정도로 중요한 문제이다. 이 온난화현상을 일으키는 주범이 바로 이산화탄이다. 이와 같은 해결책의 일환으로 CO₂를 이용하여 epoxide를 가지고, 여러 가지 고분자를 고압의 조건에서 합성해 보고, 또한 합성된 고분자의 열적분해로 이루어지는 메커니즘을 규명해 보았다.

• The Science & Technology
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• no.3 s.454
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• pp.68-69
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• 2007

세계 과학자들의 국제모임인 '기후변화 정부간 패널'(IPCC, Intergovernmental Panel on Climate Change)이 지난 2월 2일 프랑스 파리에서 지구온난화 최종 보고서'를 발표하면서 지구온난화와 기후변화의 주범으로 '인간의 활동'을 꼽고, 어느 때보다도 심각한 환경 재앙을 경고하고 나섰다. 본지에서는 보고서의 내용과 각국 움직임, 그리고 대응 기술개발 현황에 대해 알아보았다.

• Proceedings of The Korean Society of Agricultural and Forest Meteorology Conference
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• 2018.06a
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• pp.131-131
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• 2018

• Journal of Korean Society of Forest Science
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• v.102 no.1
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• pp.156-160
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• 2013

Global warming affects terrestrial ecosystem productivity including photosynthesis and plant growth. This study was conducted to investigate the effect of experimental warming on chlorophyll contents and net photosynthetic rate of Quercus variabilis Blume seedlings. One-year-old Q. variabilis seedlings were planted in control and warmed plots in April 2010. The air temperature of warmed plots was increased by $3^{\circ}C$ compared to control plots using the infrared lamp from November 2010. Total chlorophyll contents were higher in warmed plots than those in control plots in May, July, August, September and October, 2012, however, the differences were statistically significant only in October. Net photosynthetic rates were also higher in warmed plots than those in control plots in May (57.0%), September (21.4%), and October (89.6%), however, the differences were significant only in May and October. Higher chlorophyll contents and net photosynthetic rate of warmed plots in spring and fall might be related to the extended growing season length.

• Journal of Korea Water Resources Association
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• v.32 no.6
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• pp.617-625
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• 1999

Global warming has begun since the industrial revolution and it is getting worse recently. Even though the increase of greenhouse gases such as $CO_2$ is thought to be the main cause for global warming, its impact on global climate has not been revealed clearly in rather quantitative manners. However, researches using General Circulation Models(GCMs) has shown the accumulation of greenhouse gases increases the global mean temperature, which in turn impacts on the global water circulation pattern. This changes in global water circulation pattern result in abnormal and more frequent meteorological events such as severe floods and droughts, generally more severe than the normal ones, which are now common around the world and is referred as a indirect proof of global warming. Korean peninsula also cannot be an exception and have had several extremes recently. The main objective of this research is to analyze the impact of global warming on the change of flood and drought frequency. Based on the assumption that now is a point in a continuously changing climate due to global warming, we analyzed the observed daily rainfall data to find out how the increase of annual rainfall amount affects the distribution of daily rainfall. Obviously, the more the annual rainfall depth, the more frequency of much daily rainfall, and vice versa. However, the analysis of the 17 points data of Keum river basin in Korea shows that especially the number of days of under 10mm or over 50mm daily rainfall depth is highly correlated with the amount of annual rainfall depth, not the number of dry days with their correlation coefficients quite high around 0.8 to 0.9.