• Journal of Chest Surgery
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• v.40 no.2 s.271
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• pp.122-127
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• 2007

Background: Spontaneous pneumothorax is a common respiratory condition and has been postulated that it develops because of rupture of subpleural blebs. Although the morphology and ultrastructure of causative lesions are well known, the reason for rupture of sbupleural blebs is not absolutely clear. Broad consensus concerning the role of meteorological factors in spontaneous pneumothorax dose not exist. The aim of the study was to examine the influence of change of atmospheric pressure and temperature on the occurrence of spontaneous pneumothorax. Material and Method: One hundred twenty eight consecutive spontaneous pnemothorax events that occurred between January 2003 and December 2004 were selected. Changes of meteorological factors of particular days from the day before for 5 consecutive days were calculated and compared between the days with pneumothorax occurrence (SP days) and the days without pneumothorax occurrence (Non SP days). The correation between change of pressure and temperature and the occurrence of SP was evaluated. Result: SP occurred on 117 days (16.0%) in the 2-year period. Although there was no significant differences in change of pressure factors prior 4 days of SP occurrence compare to the 4 days prior Non SP day, change of mean pressure was higher (+0.934 vs. -0.191hPa, RR 1.042, Cl $1.003{\sim}1.082$, p=0.033), and change of maximum pressure fall was lower (3.280 vs. 4.791 hPa, RR 1.051, Cl $1.013{\sim}l.090$, p=0.009) on the 4 days prior SP day. There were significant differences in change of temperature factors prior 2 days and the day of SP, Changes of mean temperature (-0.576 vs.+$0.099^{\circ}C$, RR 0.886, 95% Cl $0.817{\sim}0.962$, p=0.004) and maximum temperature rise (7.231 vs. $8.079^{\circ}C$, RR 0.943 Cl $0.896{\sim}0.993$, p=0.027) were lower on the 2 days prior SP. But changes of mean temperature (0.533 vs. $-0.103^{\circ}C$, RR 1.141, Cl $1.038{\sim}l.255$, p=0.006) and maximum temperature rise (9.209 vs. $7.754^{\circ}C$, RR 1.123, Cl $1.061{\sim}1.190$, p=0.006) and maximum temperature rise (9.209 vs. $7.754^{\circ}C$ RR 1.123, Cl $1.061{\sim}l.190$, p=0.000) were higher on the SP days. Conclusion: Charge of atmospheric pressure and temperature seems to influence the chance of occurrence of SP. Meteorological phenomena that pressure rise 4 day prior to SP and following temperature fall and rise might explain the occurrence of SP. Further studies should be continued in the future.

• Korean Journal of Agricultural and Forest Meteorology
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• v.25 no.4
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• pp.446-454
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• 2023

The impact of climate change on agriculture is substantial, especially as global warming is projected to lead to varying temperature and humidity patterns in the future. These changes pose a higher risk for both crops and livestock, exposing them to environmental stressors under altered climatic conditions. Specifically, as temperatures are expected to rise, the risk of heat stress is assessable through the Temperature-Humidity Index (THI), derived from temperature and relative humidity data. This study involved the comparison of THI collected from 10 Korea Meteorological Administration ASOS stations spanning a 60-year period from 1961 to 2020. Moreover, high-resolution temperature and humidity distribution data from 1981 to 2020 were employed to generate high-resolution TH I distributions, analyzing temporal changes. Additionally, the number of days characterized by heat stress, derived from TH I, was compared over different time periods. Generally, TH I showed an upward trend over the past, albeit with varying rates across different locations. As TH I increased, the frequency of heat stress days also rose, indicating potential future cost increases in the livestock industry due to heat-related challenges. The findings emphasize the feasibility of evaluating heat stress risk in livestock using THI and underscore the need for research analyzing THI under future climate change scenarios.

• Environmental and Resource Economics Review
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• v.24 no.2
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• pp.343-363
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• 2015

This study is to analyze the effects of climate change on national total factor productivity. Changes in temperature and rainfalls which are the representative climate variables are used as main factors to measure climate change. Not only average values of the variables but those highest values are used as independent variables in the model, in order to consider the characteristic pattern of recent climate change, the high volatilities. The OLS results are corresponding to previous literature that average temperature has a negative relationship with productivities while average rainfalls have a positive relationship. However, the results of panel analysis contradict the argument of the negative relationship between average temperature and productivities since human beings can adapt the climate change. Therefore adaptation capacity is important to forecast the effects of climate changes on economies.

• Proceedings of the Korea Water Resources Association Conference
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• 2022.05a
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• pp.198-198
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• 2022

최근 도시화에 따른 토지 피복 변화와 열섬현상 등의 원인으로 상승하는 도시의 기온이 식물 계절에 미치는 영향에 관한 연구들이 다수 진행되고 있다. 본 연구는 수도권인 서울과 경기도 지역을 대상으로 도시 내 열섬현상으로 인한 기온 상승과 도시 지역 내 식생 생장기간 변화의 관계성을 분석하였다. 식물계절 모니터링에 사용한 개량식생지수(Enhanced Vegetation Index, EVI)는 Google Earth Engine (GEE)에서 제공하는 30 m 해상도의 2000-2021년 NASA-USGS Landsat 위성(TM5, ETM+7, OLI8)의 지표면 반사율(surface reflectance, SR) 자료에서 도출하여 생장기간 산정에 사용하였다. 또한 PRISM (Parameter-elevation Regressions on Independent Slopes Model)을 각 기상관측지점의 일별 지상 기온 자료에 적용하여 30 m 해상도로 생성한 격자형 지표면 온도의 공간적 패턴을 분석하였다. 연구 지역 내 도시화 정도(magnitude)를 도심으로부터의 거리와 환경부 토지피복도 및 인구 밀도를 종합하여 특정하였고, 최종적으로 기후변화 및 도시화 정도와 생장기간 변화의 특징을 분석하였다. 비선형 로지스틱 회귀를 사용하여 EVI 데이터를 종합하여 분석한 결과, 수도권 지역에서 전반적으로 식물계절 개엽일(Start of Season)은 앞당겨지며 낙엽일(End of Season, EOS)은 늦춰져 생장기간(Length of Growing Season, LOS)이 길어짐을 발견하였다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.12 no.1 s.24
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• pp.23-32
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• 2006

This study was conducted to find out the effects of meterological factors on oceanic conditions when cold and dry continental air mass passes through the western sea of Korea The change of ocean conditions during the winter season were more obvious in coastal area than open sea And sea surface temperature (SST) during February is lower by $3^{\circ}C$ than December but in coastal area SST dropped by $3^{\circ}C$. As for the salinity, there was not much difference between areas except southern area of Mokpo. In the coastal regions, air temperature(AT) and SST showed a positive correlation; as the air temperature goes up with the increase of SST and when the former goes down the latter decrease. SST of open sea seems to be changed by latent (Qe) and sensible heat (Qs), when the open sea lose its heat by Qe and Qs then SST goes down And when they get the heat then the SST goes up. 1here was a positive correlation between the AT of the coastal region and sea surface salinity (SSS), when the AT goes up then SSS increase and when the former goes down the latter decrease. Precipitation during the summer seasons (June$\sim$September) appeared to the more closely related with salinity of February of the following year than those of October and December.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.65 no.4
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• pp.327-338
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• 2020

In recent years, the temperature of Korea has been rapidly increasing due to global warming. Over the past 40 years, the temperature of Korea has risen by about 1.26℃ compared to that in the early 1980s. By region, the west region of the Gangwon Province was the highest at 1.76℃ and the Jeonnam Province was the lowest at 0.96℃. As the temperature continues to rise, it is expected that the rice yield will decrease in the future using the current standard cultivation method. As a result of global warming, the periods in which rice cultivation could be possible in regions each year has increased compared those to the past, showing a wide variety from 110 days in Taebaek to 180 days in Busan and Gwangyang. In addition, the transplanting time was delayed by 3-5 days in all regions. The average annual yield of rice showed an increasing trend when we analyzed the average productivities of developed varieties for cooked rice since the 1980s, especially in the early 1990s, which showed a rapid increase in productivity. The relationship between the average temperature at the time of development and the rice yield was divided into the periods before and after 1996. The higher the average temperature, the lower the yield of the developed varieties until 1996. However, since 1996, the increase in the average temperature did not show a trend in the productivity of the developed varieties. The climate change adaptability of developed rice varieties was investigated by analyzing the results of growing crops nationwide from 1999 to 2016 and the change in the annual yields of developed varieties and recently developed varieties as basic data to investigate the growth status of the crops in the country. As a result of annual comparisons of the yields of Taebongbyeo (2000) and Ungwangbyeo (2004) developed in the early 2000s for Odaebyeo, which was developed in the 1980s, the annual yields were relatively higher in varieties in the 2000s despite the increase in temperature. The annual yields of Samgwangbyeo (2003) and Saenuribyeo (2007), which were recently developed as mid-late-type varieties, were higher than those of an earlier developed variety called Chucheongbyeo, which was developed in the 1970s. Despite the rapid increase in temperature, rice cultivation technology and variety development are well adapted to climate change. However, since the biological potential of rice could reach its limit, it is necessary to develop continuous response technology.

• Proceedings of the Korea Water Resources Association Conference
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• 2019.05a
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• pp.139-139
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• 2019

지구 온난화 및 기후변화로 인해 비롯된 전 지구적인 기온 상승은 가뭄, 폭염, 한파 등의 이상 기후 현상을 야기하여 인류의 생존을 위협하는 환경 문제로 대두되고 있다. 이와 같은 기후변화 및 이상기후 현상을 이해하고 파악하기 위해서는 정확하고 상세한 기온 정보가 필수적이다. 우리나라는 기상청에서 전국 590개소의 기상관측장비로 기온 정보를 생산하고 있지만 산림이 약 70%를 차지하는 복잡한 지형을 가지고 있어 지상관측밀도의 공간적 제약이 발생해 상세하고 균일한 기온 정보 생산에 제약이 있다. 이러한 단점을 극복하기 위해 본 연구에서는 위성으로 측정한 지표면 온도(Land Surface Temperature, LST) 자료와 다중선형회귀모형(Multiple Linear Regression Model)을 활용해 두 자료간의 상관관계를 파악하고 지상기온을 예측하고자 한다. 위성자료로 Terra 및 Aqua MODIS 위성의 1000m 공간해상도를 가진 일별 LST자료 MOD11A1, MYD11A1의 Daytime 자료를 각각 2000년부터 2018년까지 총 19년의 기간에 대해 구축하였으며, 전국 92개의 기상청 관측소로부터 최고, 최저 기온 자료를 동 기간에 대해 구축하였다. LST를 이용한 이상기온 예측 알고리즘은 python을 이용해 구현하였으며 예측 결과는 실제 기온 자료를 통해 검증하였다. 또한, 예측 기온 자료의 연대별, 순별(상, 중, 하순) 분석을 실시하고, 2018년 극한 폭염 및 한파(2017년 12월~2018년 2월)의 예측 가능성을 검토하여 연구 결과에 대한 다양한 활용방안을 제시하고자 한다.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1999.04a
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• pp.104-107
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• 1999

근래의 생산시설의 대규모화, 유리온실 및 양액재배 면적의 확대 등의 변화에 따라 이를 만족시키기 위한 고도의 환경조절이 요구되고 있다. 그 동안의 식물 생산시설에 관한 연구는 주로 난방에너지 절약에 초점을 맞추어 왔지만, 하절기 온실내부에서의 온도의 과다상승 또한 주년생산을 위해서 해결해야 할 과제이다. 여름철 온실내 기온은 충분한 환기를 실시한다 해도 외기온보다 높으며 4$0^{\circ}C$를 넘는 경우도 드물지 않다. (중략)

• Proceedings of the KGS Conference
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• 2003.05a
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• pp.79-82
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• 2003

인류의 활동으로 인해 전구적으로 일어나고 있는 기후 변화를 탐지하고 원인을 규명하는 것은 중요한 기후 연구 주제이다. 2001년에 발간된 IPCC 보고서는 기후에 대한 인류의 영향으로 19세기 후반 이후 지구의 평균기온이 약 0.7$^{\circ}C$ 상승했다고 결론지었다. 그러나 이러한 경향은 시공간적으로 일정하지 않을 뿐만 아니라, 평균 변화가 극한 사상의 변화를 반드시 이끌어 내는 것은 아니다. 하지만, 평균 변화는 사회나 생태계 전반에 걸쳐서 영향을 미치게 될 기후 행태를 변화시킨다. (중략)

• The Science & Technology
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• v.33 no.2 s.369
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• pp.84-88
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• 2000

세계의 기상관측시대는 한국으로부터 열렸다고 볼 수 있다. 1441년 세계 최초로 세종때 측우기를 개발하였기 때문이다. 새 천년을 맞아 상당수 과학자들은 대기온난화 등 미래의 지구기후에 관심을 기울이고 있다. 실제로 기온이 3℃ 상승하면서 해수면이 1m 이상 높아지고 바닷물이 지하로 흘러들어 우물이 짠물이 된다. 또 기온이 3℃ 강하하면 지상에 얼음과 눈이 누적되어 해수면이 3~6cm 낮아지고 지하수면도 낮아져 하천과 호수가 바닥을 드러내게 되어 과학자들은 크게 우려하고 있다.