• Ocean and Polar Research
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• 제24권3호
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• pp.227-236
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• 2002

For ten firn cores, from both the eastern and the western side of Lambert Glacier basin (LGB), snow accumulation rate and isotopic temperature were measured far the recent 50 years. Results show that snow accumulation for five cores over the eastern side of LGB (GC30, GD03, GD15, DT001, and DT085) at Wilks Land and Princess Elizabeth Land increases, whereas it decreases at the western side (Core E, DML05, W200, LGB 16, and MGA) at Dronning Maud Land, Mizuho Plateau and Kamp Land. For the past decades, the increasing rate was $0.34-2.36kg\;m^{-2}a^{-1}$ at the eastern side and the decreasing rate was $-0.01\;-\;-2.36kg\;m^{-2}\;a^{-1}$ at the western side. Temperatures at the eastern LGB were also increased with the rate of $0.02%o\;a^{-l}$. At the western LGB it was difficult to see clear trends, which were confirmed by Instrumental temperature records at coastal stations. Although statistic analysis and modeling results display that both surface temperature and accumulation rate has increased trends in Antarctic ice sheet during 1950-2000, the regional distributions were much more different for different geographic areas. We believe that ice-core records at Wilks Land and Princess Elizabeth Land reflect the real variations of SST and moisture change in the southern India Ocean. For the Kamp Land and Dronning Maud Land, however circulation pattern was different, by which the climate was more complicated. The International Trans-Antarctic Scientific Expedition (ITASE) aimed to reveal an overall spatial pattern of climate change over Antarctic ice sheet for the past 200 years. This study points the importance of continental to regional circulation to annual-decadal scale climate change in Antarctica.

• 환경위생공학
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• 제24권2호
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• pp.17-30
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• 2009

In Iksan city, there have been a lot of complaints caused by offensive odor from residents living near the public environmental infrastructures and the Iksan industrial complex. To solve these problems, it is important to know the present condition of odor pollution level in these areas, the emission characteristics of malodorous gases in temporal and spatial variations in addition to meteorological components, and the facilities of major sources emitting malodorous compounds. The objectives of this study is to make the odor monitoring network for 20 people who lived and worked in areas where the environmental infrastructures and the Iksan industrial complex are located and their neighboring areas for six months from June 1st to October 31st in 2008 in Iksan and to monitor the temporal and regional frequency and characteristics of odor intensity using direct olfactory methods. As a result of odor monitoring, the highest frequency of sensed odor per month and 20 people for six months was found to be 107 in July, followed by 84 in September, 80 in August, 54 in June, 38 in October, respectively. Odor intensity trend showed a regional trend in the decreasing order of Dongsan-dong, Busong-dong, and Palbong-dong. Odor was widely perceived from night through next morning and considered as the sense of excreta, chemicals, sewage, compost, waste, etc. When high odor intensity was sensed, there were constant meteorological characteristics: relative humidity was 80~90%, wind speed was less than 0.5~1 m/sec, and main wind directions were from the east, the southeast, and the south.

• 환경생물
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• 제36권2호
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• pp.99-106
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• 2018

기존에 주로 논 수서생물의 채집을 위해 사용된 방형구법과 뜰채법은 높은 노동력을 요구했기 때문에 광범위한 지역을 대상으로 한 모니터링이 어려웠다. 이 연구는 논 수서생물을 보다 신속하게 채집할 수 있는 수중트랩을 사용하여 지역 및 시기별 논 수서생물의 군집 조성을 확인하였다. 수중트랩은 논을 대표하는 수서생물 중 환경 변화를 지표하거나 수조류의 먹이가 되는 이동성이 높은 종이 포함된 분류군을 채집하는 데 유용했다. 사과우렁이과 (Ampullariidae), 미꾸라지과 (Cobitidae), 물벌레과 (Corixidae), 물방개과 (Dytiscidae), 물땡땡이과 (Hydrophilidae), 물달팽이과 (Lymnaeidae) 등 15개 분류군은 논 수서생물 군집 조성을 결정했다. 주요 분류군 중 환경 교란에 강한 깔다구과 만이 논 수서생물 군집의 시기 변화를 대표했다. 인위적인 영향에 민감한 사과우렁이과, 물땡땡이과 그리고 물방개과는 지역별로 분포가 상이했다.

• Spatial Information Research
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• 제21권6호
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• pp.81-89
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• 2013

최근 국외에서 수행된 몇몇 선행 연구들은 주택 가격과 개인 및 지역사회의 비만 수준 사이에 밀접한 상관관계가 존재함을 보여준다. 이는 주택 가격이 개인 및 지역의 사회경제적 수준을 나타내는 지표로 쓰일 수 있음을 시사한다. 본 연구는 우리나라에서도 지역의 주택 가격수준이 지역에 거주하는 개인들의 집계된 건강수준을 잘 설명할 수 있는지 분석하였다. 분석결과는 우리나라에서도 해외의 사례에서와 같이, 지역의 주택 가격으로 대표되는 사회경제적 수준이 높을수록 지역의 비만도가 낮아지는 것을 보여주었다. 그리고 지역의 평균적 주택 가격수준이 비교된 여타의 사회경제적 수준 지표들 못지 않게 지역의 비만인구 비율을 잘 설명하고 있음을 보여주었다. 본 연구결과는 주택 가격이 다른 사회경제적 지표들과 같이 지역의 사회경제적 수준을 대표하는 효과적인 지표가 될 수 있음을 보여준다.

• 한국환경보건학회지
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• 제41권4호
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• pp.259-267
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• 2015

Objectives: This study evaluated the regional and seasonal concentrations of ambient hazardous heavy metals in an industrial complex area in Daegu City. Methods: A total of 64 SPM (Suspended Particulate Matter) samples were collected in non-industrial and industrial areas during 2014 and were analyzed for hazardous heavy metals elements (As, Cd, Mn, Ni, Pb) with ICP after acid extraction. Results: SPM and hazardous heavy metals concentrations showed regional (industrial complex area>non-industrial complex area) and seasonal (spring, winter>fall, summer) variations. All of the hazardous heavy metals were influenced by anthropogenic sources. The pollution index of hazardous heavy metals was very low, showing roughly one-quarter of the level of the air quality guidelines of WHO. The correlation analysis among SPM and hazardous heavy metals indicated that components of non-industrial complex areas were more related to each other than those of industrial complex areas, and the correlation in the winter was higher than in other seasons. Conclusion: It is necessary to control air pollution sources and establish related policy because hazardous heavy metals from industrial areas can influence residential areas.

• 한국지역지리학회지
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• 제22권2호
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• pp.439-449
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• 2016

몬순 시스템의 변화를 이해하기 위해서는 과거의 변화에 대한 정보가 절실히 필요하다. 이 연구에서는 강원도 평창에서 확보한 석순에 기록되어 있는 한반도 홀로세 중후기 고기후의 변화 특성과 몬순 변동을 확인하였다. 이를 위해 절단면의 성장성 분석과 탄소 및 산소동위원소 분석, 그리고 방사성 탄소연대측정 등을 수행하였다. 석순은 약 4580 yr BP에서 660 yr BP 사이에 생성된 것으로, 미약한 중기 청동기저온기, 철기저온기-로마온난기, 중세암흑저온기가 나타났다. 동아시아 지역에서 해당기간 확인된 몬순 약화 현상이 나타났으며, 기존 연구에 비해 다소 빨리 발생 하였을 가능성을 확인하였다.

• 한국지역지리학회지
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• 제20권3호
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• pp.334-343
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• 2014

우리나라의 말라리아는 1990년대 초에 재 출현한 이후로 그 발병사례가 지난 10년 동안 증감을 거듭해오고 있다. 말라리아의 주된 발병 지역이 비무장지대 인근의 남북한 경계를 따라 분포하고 있는 점을 고려할 때, 우리나라 말라리아 발생은 이 지역의 자연과 거주 환경에 의해 영향을 받고 있는 듯하다. 말라리아는 말라리아 원충을 옮기는 모기에 의해 감염되는 전염병이므로 이 질병의 발병율은 특정 기후 및 사회인구학적 인자들과 밀접한 연관성을 가지고 있다. 본 연구에서는 말라리아 발생의 공간적 특성이 모기 서식환경의 비율, 모기서식지와 주거지역 간의 거리, 도시화에 따른 자연환경 및 사회인구적 환경, 그리고 해당 지역의 국지적 지형과 관련이 있음을 논의하였다.

• 한국수산과학회지
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• 제54권5호
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• pp.685-690
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• 2021

Harmful shell-boring species of the genus Polydora (Polychaeta: Spionidae) were frequently reported from commercially important mollusk species in Korea, Japan and China. The traditional approach based on the morphological characteristics showed limitations for species discrimination among shell-boring species. Therefore, DNA barcoding was adopted to identify Polydora species using molecular markers. Two Polydora species (P. haswelli and P. hoplura) in abalone shells were reported from our previous molecular phylogenetic study. In this study, we additionally reported the presence of shell-boring Polydora haswelli in commercially sold shellfish. The taxon-specific cox1 marker used in this study successfully allowed the isolation of P. haswelli from cockle Scapharca subcrenata, mussel Mytilus galloprovincialis, oyster Crassostrea gigas and scallop Argopecten irradians. Polydora hoplura was not found in these shellfish species. The genetic variations were found on the intraspecific level of P. haswelli and the same genotype was also detected in different shellfish species. This result can provide information on a new host and accurate parasitic Polydora species. Moreover, this report can be used as the biodiversity data of Polydora species on the invasion and transition of harmful Polydora species in mollusk aquaculture farms.

• 대한응급의학회지
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• 제29권6호
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• pp.603-615
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• 2018

Objective: We analyzed the association between regional weather and temporal changes on the daily occurrence of trauma emergencies and their severity. Methods: In this cross-sectional prospective study, we investigated daily atmospheric patterns in trauma episodes in 1,344 patients in Cheongju city, South Korea, from January 2016 to December 2016 and analyzed the association of trauma occurrence and Injury Severity Scores (ISS) with weather conditions on a daily scale. Results: The mean age of trauma patients was $53.0{\pm}23.8years$ and average ISS was $9.0{\pm}2.0$. Incidence of trauma was positively correlated with average temperature (r=0.512, P<0.001) and atmospheric pressure (r=0.332, P=0.010) and negatively correlated with air pollutants (particulate matter less than $2.5{\mu}m^3$ [PM2.5], r=-0.629, P<0.001; particulate matter less than $10{\mu}m^3$ [PM10], r=-0.679, P<0.001). ISS was not significantly correlated with climate parameters and air pollutants, and variability was observed in the frequency and severity of trauma by time of day (highest occurrence, 16-20 pm; highest ISS, 4-8 am), day of the week (highest occurrence and highest ISS, Saturday), month of the year (highest occurrence, July; highest ISS, November), and season (highest incidence, summer; highest ISS, autumn). Conclusion: The study shows a positive relationship between trauma occurrence and specific weather conditions, such as atmospheric temperature and pressure. There was a negative relationship between concentrations of PM2.5 or PM10, and trauma occurrence. However, no correlation was observed between weather conditions or the concentrations of air pollutants and ISS. In addition, seasonal, circaseptan, and circadian variations exist in trauma occurrence and severity. Thus, we suggest that evaluation of a larger, population-based data set is needed to further investigate and confirm these relationships.

• Journal of Preventive Medicine and Public Health
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• 제54권6호
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• pp.385-394
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• 2021

Objectives: This study aimed to explore the status of regional variations in acute ischemic stroke (AIS) treatment and investigate the association between the presence of a thrombectomy-capable stroke center (TSC) and the case fatality rate (CFR) of AIS within hospital service areas (HSAs). Methods: This observational cross-sectional study analyzed acute stroke quality assessment program data from 262 hospitals between 2013 and 2016. TSCs were defined according to the criteria of the Joint Commission. In total, 64 HSAs were identified based on the addresses of hospitals. We analyzed the effects of structure factors, process factors, and the presence of a TSC on the CFR of AIS using multivariate logistic regression. Results: Among 262 hospitals, 31 hospitals met the definition of a TSC. Of the 64 HSAs, only 20 had a TSC. At hospitals, the presence of a stroke unit, the presence of stroke specialists, and the rate of endovascular thrombectomy (EVT) treatment were associated with reductions in the CFR. In HSAs, the rate of EVT treatment (odds ratio [OR], 0.98; 95% confidence interval [CI], 0.97 to 0.99) and the presence of a TSC (OR, 0.93; 95% CI, 0.88 to 0.99) significantly reduced the CFR of AIS. Conclusions: The presence of a TSC within an HSA, corresponding to structure and process factors related to the quality of care, contributed significantly to lowering the CFR of AIS. The CFR also declined as the rate of treatment increased. This study highlights the importance of TSCs in the development of an acute stroke care system in Korea.