• Title/Summary/Keyword: Climatic

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Holocene climate characteristics in Korean Peninsula with the special reference to sea level changes (해수면 변동으로 본 한반도 홀로세(Holocene) 기후변화)

  • Hwang, Sangill;Yoon, Soon-Ock
    • Journal of The Geomorphological Association of Korea
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    • v.18 no.4
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    • pp.235-246
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    • 2011
  • Sea level fluctuations during the Holocene reconstructed by the results of age dating, microfossils researches and sedimentary facies from coastal alluvial plains contain the valuable informations on climatic changes. The sea level during 'maximum phase of transgression' during 6,000~5,000 yr BP was slightly higher than the present by approximately 0.8~1.0 m and the summer temperature conditions seemed to be higher than those of the present by 2~3℃ in the Central Europe when the period of 'Climatic Optimum' might be dominant. The sea level in Korean Peninsula was assumed by 0.8~1.0 m higher at that time compared to the present and climate seemed to be warmer. At 2,000~1,800 yr BP in Korean Peninsula, the sea level reached the higher stand than the present by approximately 1.1~1.3 m and the climatic conditions might be warm similar to the period of 'Climatic Optimum'. Although the temperature in the Central Europe during the period of 'Subboreal' was about 2~3℃ cooler, it is supposed that the sea level in Korean Peninsula was relatively higher than the present. The sea level at 2,300 yr BP might be similar to that of the present, which was the lowest level since the mid-Holocene. From the fact, climatic environment during the cold period might not be reflected exactly in the sea level.

Impact of future climate change on UK building performance

  • Amoako-Attah, Joseph;B-Jahromi, Ali
    • Advances in environmental research
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    • v.2 no.3
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    • pp.203-227
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    • 2013
  • Global demand for dwelling energy and implications of changing climatic conditions on buildings confront the built environment to build sustainable dwellings. This study investigates the variability of future climatic conditions on newly built detached dwellings in the UK. Series of energy modelling and simulations are performed on ten detached houses to evaluate and predict the impact of varying future climatic patterns on five building performance indicators. The study identifies and quantifies a consistent declining trend of building performance which is in consonance with current scientific knowledge of annual temperature change prediction in relations to long term climatic variation. The average percentage decrease for the annual energy consumption was predicted to be 2.80, 6.60 and 10.56 for 2020s, 2050s and 2080s time lines respectively. A similar declining trend in the case of annual natural gas consumption was 4.24, 9.98 and 16.1, and that for building emission rate and heating demand were 2.27, 5.49 and 8.72 and 7.82, 18.43 and 29.46 respectively. The study further analyse future heating and cooling demands of the three warmest months of the year and ascertain future variance in relative humidity and indoor temperature which might necessitate the use of room cooling systems to provide thermal comfort.

An Estimation of Contamination Degree using the Statistical Analysis between Contamination and Climatic Data (오손도와 기상 데이터의 통계적 분석을 이용한 오손도 예측)

  • 심규일;김호수;김주한;박흥석;한상옥
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.18 no.1
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    • pp.73-77
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    • 2004
  • The accumulation of salt contamination could be the source of electrical accident. The degree of contamination on outdoor insulator is represented by ESDD(equivalent salt deposit density). The salt is transported by the wind to the outdoor insulator and cleaned by the rain. So, we can estimate the relation between climatic data and ESDD by using the multiple regression method. The results of pre-study presented the high relation coefficient(0.874). But these results couldn't apply to another period So, this paper improves above problem by mathematical process of climatic data The main method is accumulation of passed climatic data and conversion of the rainfall by the wind. Then, we confirmed the increasement of relation coefficient(0.898).

Effect of Climatic Factors on Disease Incidence of Barley fellow Mosaic Virus (BaYMV) (기상 요인이 보리호위축병(BaYMV) 발생에 미치는 영향)

  • 박종철;서재환;김형무;이귀재;박상래;서득용
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.48 no.3
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    • pp.156-159
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    • 2003
  • Barley yellow mosaic virus (BaYMV) cause severe damage in barley cropping field especially yield reduction about 40% to 100% depend on climatic conditions and varieties. The correlations between disease incidence (DI) and changes of climatic conditions were analyzed. The average temperature affected on the DI in early barley growing stage before wintering. However any factors was not correlated with DI during wintering season that means barley growth was closely related to virus reproduction. Significant correlation between the highest temperature and DI during barley regeneration time that temperature, especially the highest, has to be considered to set appropriate time for DI investigation.

The Impact of Abrupt Climate Change on the Marine Ecosystem in the East Sea

  • Shin, Im-Chul;Yi, Hi-Il;Chung, Hyo-Sang;Kwon, Won-Tae;Chun, Jong-Hwa;Oh, Hyun-Taek
    • The Korean Journal of Quaternary Research
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    • v.17 no.2
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    • pp.1-7
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    • 2003
  • Environmental changes caused by the abrupt climatic change are one of the important issues in the scientific community. In the East Sea, abrupt climatic shift, called Younger Dryas, is identified. The age of the Younger Dryas cold episode occurred at 11.2 ka. Overall, changes in circulation and bottom water conditions occurred during the Younger Dryas cold episode in the study area. Especially, climatic transition from meltwater spike to the Younger Dryas cold episode is characterized by significant shifts of oxygen isotope values, the coiling ratios of Neogloboquadrina pachyderma, and the planktonic foraminifers abundances. The impact of abrupt climate change on the ecosystem is very significant. In the East Sea, the calcium carbonate secreting organism(foraminifers) is replaced by silicon dioxide secreting organisms(diatom, radiolarian) after the abrupt and severe cold climatic event. Based on the Doctrine of Uniformitarianism, at least climate change for the next 100 years would be severely influence on the marine ecosystem.

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Comparative Analysis of the Change Tendency between Climatic Elements and Electricity Generation of Building Integrated Photo Voltaic in Winter (동절기 기후 요소와 수직면 건물일체형 태양광발전시스템 발전량의 상관관계 분석)

  • Park, Kang-Hyun;Kim, Su-Min
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.24 no.8
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    • pp.599-604
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    • 2012
  • Most air pollution and smog are a result of the burning of fossil fuels. The use of fossil fuels also causes acid rain and global warming. So the need for solar energy utilization is increased. It is essentially important to make efforts to reduce usage of fossil energy resources. In this study, we analyzed the correlation between climatic elements(Cloud cover, Duration of sunshine, Temperature) and the photovoltaic power generation. Cloud cover of the correlation coefficient was 0.87. And duration of sunshine of the correlation coefficient was 0.93. The order of the correlation coefficient was duration of sunshine, cloud cover, temperature. To accurately analyze of the degree of correlation for the photovoltaic power generation, additional research about climatic elements that show a high correlation is needed.

Experimental Study on Developing of Double Facade System dealing with the various climatic Conditions (다양한 기후조건에 대응하는 이중외피시스템 개발에 관한 실험적 연구)

  • Lee, Keon-ho;Kim, Hyeon-soo;Jang, Dae-hee;Moon, Soo-young
    • KIEAE Journal
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    • v.5 no.2
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    • pp.19-26
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    • 2005
  • Every site has a different given geometrical and climatic condition, which influenced not only the lifestyle of the humanbeings but also the regional architecture. For example, on a cold region, the reduction of the energy loss is necessary, like an igloo, which has a littlest energy loss at hemisphere. Or on a warm region, the house must be protected thermally from the overheating at the sunshining. like a huge shading. An architectural interpretation in the (extreme) moderate climate, like Korea, has always tried to satisfy the both opposite demands simultaneously. A facade, which divides out- and inside, has an ideal position to lead the regulated regional climatic conditions into the room. The Double Facade System(DFS) is well known as an innovative solution in the european countries, like Germany. It provides an reasonable alternative, which can achieve these goals at the same time. A Double Facade System provides an effective sunshade, which means a cooling energy reduction at the warm season. In addition, it enables a natural ventilation at the cold season with the preheating at the system as well as spring and autumn. An ordinary Single Facade System with a inside or outside sun blind provides a solution just for a specified season, like a summer or winter. But the Double Facade System can deal with the various climatic conditions in the moderate climate.

Altitudinal patterns and determinants of plant species richness on the Baekdudaegan Mountains, South Korea: common versus rare species

  • Lee, Chang-Bae;Chun, Jung-Hwa;Um, Tae-Won;Cho, Hyun-Je
    • Journal of Ecology and Environment
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    • v.36 no.3
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    • pp.193-204
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    • 2013
  • Altitudinal patterns of plant species richness and the effects of area, the mid-domain effect, climatic variables, net primary productivity and latitude on observed richness patterns along the ridge of the Baekdudaegan Mountains, South Korea were studied. Data were collected from 1,100 plots along a 200 to 1,900 m altitudinal gradient on the ridge. A total of 802 plant species from 97 families and 342 genera were recorded. Common and rare species accounted for 91% and 9%, respectively, of the total plant species. The altitudinal patterns of species richness for total, common and rare plants showed distinctly hump-shaped patterns, although the absolute altitudes of the richness peaks varied somewhat among plant groups. The mid-domain effect was the most powerful explanatory variable for total and common species richness, whereas climatic variables were better predictors for rare plant richness. No effect of latitude on species richness was observed. Our study suggests that the mid-domain effect is a better predictor for wide-ranging species such as common species, whereas climatic variables are more important factors for range-restricted species such as rare species. The mechanisms underlying these richness patterns may reflect fundamental differences in the biology and ecology of different plant groups.

Inhomogeneities in Korean Climate Data (I): Due to Site Relocation (기상청 기후자료의 균질성 문제 (I) - 관측지점의 이전)

  • Ryoo, Sang-Boom;Kim, Yeon-Hee;Kwon, Tae-Hyeon;Park, Il-Soo
    • Atmosphere
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    • v.16 no.3
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    • pp.215-223
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    • 2006
  • Among observational, local-environmental, and large-scale factors causing significant changes in climate records, the site relocations and the replacement of the instruments are well-known nonclimatic factors for the analysis of climatic trends, climatic variability, and for the detection of anthropogenic climate change such as heat-island effect and global warming. Using dataset that were contaminated by these nonclimatic factors can affect seriously the assessment of climatic trends and variability, and the detection of the climatic change signal. In this paper, the inhomogeneities, which have been caused by relocation of the observation site, in the climate data of Korea Meteorological Administration (KMA) were examined using two-phase regression model. The observations of pan evaporation and wind speed are more sensitive to site relocations than those of other meteorological elements, such as daily mean, maximum and minimum temperatures, with regardless to region.

Analysis of the Correlation between Climatic Elements and Electricity Generation of Building Integrated Photo Voltaic on Gymnasium Building's Curtain Wall (체육관 커튼월에 설치된 건물일체형 태양광발전시스템의 발전량과 기후 요소 간의 상관성 분석)

  • Park, Kang-Hyun;Lee, Jeong-Hun;Kim, Su-Min;Park, Kyung-Won
    • Journal of the Korean Solar Energy Society
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    • v.32 no.1
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    • pp.8-14
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    • 2012
  • Concerning about global warming due to emission of greenhouse effect gas like C02 and depletion of fossil fuels have been spreading. So the need for solar energy utilization is increased. It is essentially important to make efforts to reduce usage of fossil energy resources. In this study, we analyzed the correlation between climatic elements and the photovoltaic power generation. Cloud cover of the correlation coefficient was 0.93. The order of the correlation coefficient was average temperatures, hours of sunshine duration of sunshine and the humidity. To accurately analyze of the degree of correlation for the photovoltaic power generation, additional research about climatic elements that show a high correlation is needed.