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CO<sub>2</sub> 농도 및 기온 상승에 대한 현사시나무의 광합성 반응
이솔지,오창영,한심희,김기우,김판기,Lee, Solji,Oh, Chang-Young,Han, Sim-Hee,Kim, Ki Woo,Kim, Pan-Gi 한국농림기상학회 2014 한국농림기상학회지 Vol.16 No.1
지구온난화와 같은 기후변화에 적응력이 높은 조림수종을 탐색하는 연구의 일환으로 $CO_2$농도 및 기온상승이 현사시나무의 광합성생리에 미치는 영향을 조사하였다. 그 결과 현사시나무는 $CO_2$농도 및 기온 상승에 의해서 줄기의 신장생장이 억제되고 광합성 능력이 저하되었다. 그리고 광합성능력과 관련된 색소(엽록소a, b, 카로티노이드)의 함량이 감소하였다. 특히 탄소고정계의 활성과 관련된 엽록소a의 감소가 현저하게 나타났다. 그리고 광-광합성곡선과 A-Ci곡선에서 광화학계의 활성을 나타내는 순양자수율이 7%, 전자전달속도가 14% 감소하고, 탄소고정계의 활성을 나타내는 탄소고정효율이 52%, 재인산화속도가 24% 감소하였다. 이러한 결과로 $CO_2$농도 및 기온 상승에 의한 현사시나무의 광합성능력 저하는 광화학계 및 탄소고정계의 활성저하에 기인하나, 탄소고정계의 활성저하가 더 크게 작용하였음을 알 수 있다.
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CO<sub>2</sub>농도 및 온도 상승이 백합나무의 생리적 특성에 미치는 영향
이하수,이솔지,이재천,김기우,김판기,Lee, Ha-Soo,Lee, Solji,Lee, Jae-Cheon,Kim, Ki Woo,Kim, Pan-Gi 한국농림기상학회 2013 한국농림기상학회지 Vol.15 No.3
지구온난화와 같은 기후변화에 대한 백합나무의 생리적 적응반응을 구명하기 위해서, $CO_2$ 농도 및 기온 상승이 백합나무의 생리특성에 미치는 영향을 조사하였다. 그 결과 $CO_2$ 농도 및 기온 상승에 의하여 백합나무의 동화기관을 비롯한 모든 기관의 생장이 촉진되었다. 그러나 광합성능력과 관련된 광합성색소의 함량, 광화학계 및 탄소고정계의 활성 등은 일반 대기조건에서 생장한 개체와 유사한 값을 나타내, 광합성능력의 변화가 없었음이 시사되었다. $CO_2$ 농도 및 기온 상승에 의한 증산속도의 상승으로 광합성에 대한 수분이용효율이 저하하였다. 그러나 측근 생장이 촉진되어 뿌리에 대한 동화기관의 비율이 낮아지는 반응이 나타나 수분흡수능력이 높아졌음을 확인하였다. 또한 잎이 두꺼워지고 치밀해지는 형태적 변화가 나타나고, 수분 손실에 대한 잎의 저항능력이 증대되었음이 확인되었다. 이러한 결과로 $CO_2$ 농도 및 기온 상승에 의하여 백합나무의 수분 스트레스에 대한 저항능력이 증대됨을 알 수 있다.
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요양보호사의 직무스트레스와 서비스 질의 관계에서 긍정심리자본의 조절효과
이진열 ( Jinyeol Lee ),이솔지 ( Solji Lee ) 인문사회 21 2020 인문사회 21 Vol.11 No.6
The purpose of this study was to analyze the moderating effect of positive psychological capital on the effect of job stress of care workers on service quality and to provide basic data for improving service quality. For this purpose, 200 people who work in long-term care institutions in Busan were selected. As a result, there was no moderating effect of positive psychological capital. However, job stress had negative effects and positive psychological capital had positive effects. Therefore, it is necessary to improve treatment for job stress based on the results of this study, and education and counseling are needed for positive psychological capital. In addition, a follow-up study is proposed to study the relationship between psychological factors to improve the service quality of care workers.
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극 저기압(Polar Low) 통과에 의해 발생한 남극 세종기지 강풍 사례 모의 연구
권하택(Hataek Kwon),박상종(Sang-Jong Park),이솔지(Solji Lee),김성중(Seong-Joong Kim),김백민(Baek-Min Kim) 한국기상학회 2016 대기 Vol.26 No.2
Polar lows are intense mesoscale cyclones that mainly occur over the sea in polar regions. Owing to their small spatial scale of a diameter less than 1000 km, simulating polar lows is a challenging task. At King Sejong station in West Antartica, polar lows are often observed. Despite the recent significant climatic changes observed over West Antarctica, adequate validation of regional simulations of extreme weather events such as polar lows are rare for this region. To address this gap, simulation results from a recent version of the Polar Weather Research and Forecasting model (Polar WRF) covering Antartic Peninsula at a high horizontal resolution of 3 km are validated against near-surface meteorological observations. We selected a case of high wind speed event on 7 January 2013 recorded at Automatic Meteorological Observation Station (AMOS) in King Sejong station, Antarctica. It is revealed by in situ observations, numerical weather prediction, and reanalysis fields that the synoptic and mesoscale environment of the strong wind event was due to the passage of a strong mesoscale polar low of center pressure 950 hPa. Verifying model results from 3 km grid resolution simulation against AMOS observation showed that high skill in simulating wind speed and surface pressure with a bias of −1.1 m s<SUP>−1</SUP> and −1.2 hPa, respectively. Our evaluation suggests that the Polar WRF can be used as a useful dynamic downscaling tool for the simulation of Antartic weather systems and the near-surface meteorological instruments installed in King Sejong station can provide invaluable data for polar low studies over West Antartica.
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권하택(Hataek Kwon),김신우(Shin-Woo Kim),이솔지(Solji Lee),박상종(Sang-Jong Park),최태진(Taejin Choi),정지훈(Jee-Hoon Jeong),김성중(Seong-Joong Kim),김백민(Baek-Min Kim) 한국기상학회 2016 대기 Vol.26 No.4
Jangbogo station is located in Terra Nova Bay over the East Antarctica, which is often affected by individual storms moving along nearby storm tracks and a katabatic flow from the continental interior towards the coast. A numerical simulation for two strong wind events of maximum instantaneous wind speed (41.17 m s<SUP>−1</SUP>) and daily mean wind speed (23.92 m s<SUP>−1</SUP>) at Jangbogo station are conducted using the polar-optimized version of Weather Research and Forecasting model (Polar WRF). Verifying model results from 3 km grid resolution simulation against AWS observation at Jangbogo station, the case of maximum instantaneous wind speed is relatively simulated well with high skill in wind with a bias of −3.3 m s−1 and standard deviation of 5.4 m s<SUP>−1</SUP>. The case of maximum daily mean wind speed showed comparatively lower accuracy for the simulation of wind speed with a bias of −7.0 m/s and standard deviation of 8.6 m s<SUP>−1</SUP>. From the analysis, it is revealed that the each case has different origins for strong wind. The highest maximum instantaneous wind case is caused by the approach of the strong synoptic low pressure system moving toward Terra Nova Bay from North and the other daily wind maximum speed case is mainly caused by the katabatic flow from the interiors of Terra Nova Bay towards the coast. Our evaluation suggests that the Polar WRF can be used as a useful dynamic downscaling tool for the simulation and investigation of high wind events at Jangbogo station. However, additional efforts in utilizing the high resolution terrain is required to reduce the simulation error of high wind mainly caused by katabatic flow, which is received a lot of influence of the surrounding terrain.
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서동진 ( Dong-jin Seo ),김현철 ( Hyun-chul Kim ),이현석 ( Hyun Seok Lee ),이솔지 ( Solji Lee ),이위영 ( Wi-yeong Lee ),한심희 ( Sim-hee Han ),강준원 ( Jun Won Kang ) 한국농림기상학회 2016 한국농림기상학회지 Vol.18 No.4
Carbon dioxide (CO<sub>2</sub>) accounts for about 72% of the total greenhouse gas emissions. It is also widely known as a major cause of global warming. According to the IPCC`s fifth evaluation report, the growth rate of atmospheric CO<sub>2</sub> has increased by 35% for the last 100 years and global warming is occurring much more rapidly than expected since 1990s. As a result of climate change, global warming is increasing the frequency and severity of extreme weather events around the world, which has changed forest vegetation zone and vegetation phenology. The Kyoto Protocol recognizes the importance of forests and refers to the conservation and enhancement of forests as sinks and reservoirs of greenhouse gases. In this regard, studies of tree responses to climate change are indispensable for predicting changes in the forest ecosystems in the future. Therefore, studies using long-term climate change research facilities, associated with long-term ecological research (LTER) in the fields, will make a considerable contribution to predict and approach the changes in the future.
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