• Title/Summary/Keyword: Wind climate

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Damaging wind storms in North Eastern Argentina: seven case studies

  • Natalini, Bruno;Lassig, Jorge L.;Natalini, Mario B.;Palese, Claudia
    • Wind and Structures
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    • v.15 no.2
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    • pp.147-162
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    • 2012
  • Argentina is a large country with several areas dominated by different climate mechanisms. Since 2008, damage to civil structures caused by strong winds has been surveyed in Chaco and the neighbouring areas. Chaco is a province of NEA, the north-east region of the Argentina, which also includes the provinces of Formosa, Corrientes and Misiones. The strong wind events in NEA are related to severe convective storms. In this work, we present findings about wind-induced damage in NEA and the prevailing meteorological conditions. We emphasise seven particular cases for which the conditions of the atmosphere were reconstructed through reanalysis.

A Refinement of WAsP Prediction in a Complex Terrain (복잡지형에서의 WAsP 예측성 향상 연구)

  • Kyong, Nam-Ho;Yoon, Jeong-Eun;Jang, Moon-Seok;Jang, Dong-Soon;Huh, Jong-Chul
    • Journal of the Korean Solar Energy Society
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    • v.23 no.4
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    • pp.21-27
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    • 2003
  • The comparative performance of the WAsP in calculating the wind climate in complex terrain has been examined in order to test the predictability of the wind resource assessment computer code in our country. An analysis was carried out of predicted and experimental 10-min averaged wind data collected over 8 months at four monitoring sites in SongDang province, Jeju island, composed of sea, inland flat terrain, a high and a low slope craters. The comparisons show that the WAsP preditions give better agreement with experimental data by adjusting the roughness descriptions, the obstacle list.

Analysis of Wind Sector Division for Pohang Area - Part I : Coarse Division of Wind Sector for Pohang Area Using Meteorological Observation Data - (포항지역에 대한 바람권역 분석 -Part I : 기상관측자료를 토대로 분석한 성긴 바람권역 분석-)

  • Jung, Jong-Hyeon;Leem, Heon-Ho;Leem, Hwa-Woon;Chang, Hyuk-Sang;Shon, Byung-Hyun
    • Journal of Environmental Science International
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    • v.17 no.4
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    • pp.385-396
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    • 2008
  • The air quality data is important for understanding and analyzing a surrounding influence. In that light, it is positively necessary for a propriety assessment to determine a location of the air quality monitoring sites. In this study, the climate analysis about temperature and wind, using the meteorological data in the Pohang, is conducted to do that. In the next stage, we distinguished the wind by east-west or north-south component, which has less correlation than temperature, analyzed and divided the wind sector. As the result, the wind circumstance of the Pohang is divided into major 5 wind sector; that is the urban area, the northeast coastal area, the east ocean and the west mountainous area. We think that an analysis on detailed wind sector by utilizing the numerical simulation is needed.

Present and future development of Noksan wind power generation cluster (미래 풍력발전산업의 집적지육성을 위한 녹산클러스터 발전방향)

  • Lim, Hee-Chang;Han, Gyu-Taek;Jang, Gwang-Ho;Jin, Seong-Ho;Kim, Yong-Hwan
    • Journal of the Korean Academic Society of Industrial Cluster
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    • v.3 no.1
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    • pp.11-25
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    • 2009
  • Wind power is the most rapidly growing energy source in the world. Increased focus on climate changes and renewable energy is supporting the wind power industry in gaining momentum. Noksan wind cluster in Busan has been a major area in manufacturing the elementary parts of wind turbine. Despite growing recognition of the significance of Noksan, there has been only limited attention paid and in recent years. This paper reviews the literature of the current burning issues in wind turbine industries in the western countries. In addition, it describes the present state of Noksan wind power generation cluster and suggests the future plans to make it more effective complex.

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Numerical Simulation of the Asian Monsoon for the Mid-Holocene Using a Numerical Model (수치모델을 이용한 홀로세 중기의 아시아 몬순순환 변화 연구)

  • Kim, Seong-Joong;Lee, Bang-Yong;Park, Yoo-Min;Suk, Bong-Chool
    • Ocean and Polar Research
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    • v.27 no.3
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    • pp.289-297
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    • 2005
  • The change in global climate and Asian monsoon patterns during the mid-Holocene, 6000 years before present (6 ka), is simulated by a climate model at spectral truncations of T170 with 18 vertical layers, corresponding to grid-cell sizes of roughly 75km. The present simulation is forced with the observed monthly data of sea surface temperatures, and the specified concentration of atmospheric carbon dioxide, while in the mid-Holocene experiment, orbital parameters such as obliquity, precession, and eccentricity are changed to the 6ka conditions. Under such conditions, the precipitation associated with the summer monsoon is enhanced over a wider zonal band from the Middle East to Southeast Asia, while no significant alteration takes Place in winter. The monsoonal wind also increases over the Arabian Sea, showing the enhanced southwesterly wind during summer and northeasterly wind during winter. Overall, the showing of the Asian monsoon is enhanced during the mid-Holocene, especially in summer, which is consistent with the proxy estimates and other previous model simulations.

A Study on the Characteristic Micro-Climate of Myeong-Kwan Kim House and the Moisture Content Behavior of Outside Exposed Columns (김명관고택의 미기후 특성과 외진노출기둥의 함수율 양상에 관한 연구)

  • Park, Yong-Shin;Kim, Yun-Sang
    • Journal of the Korean Institute of Rural Architecture
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    • v.22 no.3
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    • pp.33-40
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    • 2020
  • Wood is one of the main materials of wooden building. Hanok also uses wood as its main component. Recently, Hanok continues to be built. Wood is affected by the climatic environment. The growth of decay bacteria is activated at more than 80% relative humidity. The microclimate environment and moisture content were measured for architectural cultural properties that have been maintained for a long time as a wooden building. The method analyzed the measured data by distinguishing between cloudy and sunny days. In the case of the old house, Anchae moisture content was higher than that of Sarangchae. This seems to be due to the narrow front yard or the planting of trees. The microclimate environment inside the house began to decrease in humidity from 8 am. According to the survey data, the relative humidity was less than 80% from 9 am when there was wind around 4-6 am. It appeared an hour earlier than in the absence of wind. As a result, the time interval for dehumidifying of wood was widened. Therefore, the wooden building is open to the front so there is airflow under the eaves during the daytime and wind in the morning appear to be alternatives in order to lower the moisture content.

A Time-Series Analysis of the Erosion and Deposition around Halmi-island, Baramarae (안면도 바람아래 할미섬 주변의 시계열적 침식·퇴적환경 변화 분석)

  • Yu, Jae Jin;Kim, Jang-soo;JANG, Dong-Ho
    • Journal of The Geomorphological Association of Korea
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    • v.23 no.1
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    • pp.47-60
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    • 2016
  • In this study, datum points measurement have been collected and then weather data have been analyzed to figure out erosion and deposition environmental change around Halmi-island, Baramarae. First of all, it was difficult to analyze geomorphological change which is caused by climate change because of quite short term of collection period of data. However, differences in spatial distribution of erosion and deposition have locally been shown. In all season, the wind is blowing in north and north-west direction mostly except in summer which is shifted to south direction. However, since its ratio which are above 5m/s is much lower than the north and north-west wind, its effect on geomorphological process is very tiny. In order to look at a tendency of erosion and deposition environmental change around Baramarae Halmi-island, the periphery of Halmi-island was classified to east and west part, then accumulated erosion and deposition values have been calculated. As a result, generally, the datum points are located in the west part which are mostly depositional sites. On the other hand, the datum points are located in east part showed the dominant erosion patterns.

Analysis on Residential Micro Climate of the Urban Heat Island and Oxygen Concentration in Winter (겨울철 열섬 및 산소농도의 측정을 통한 주거지별 국지기후의 특성분석)

  • Hwang Jee Wook;Kim So Chong
    • Journal of Environmental Science International
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    • v.13 no.12
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    • pp.1023-1032
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    • 2004
  • Rapid progress in urbanization has resulted in a change of the micro climate, especially in the urban area. In order to investigate the phenomenon of the heat island in the residential micro climate, a field survey was carried out by 4 sets of the residential type in Jeonju under typical winter synoptic condition. As analytic methode, it is used the comparison on the relation of the Land-to-Coverage Rate to Heat Island and Oxygen Concentration. And as a key question it is asked how stable characteristics of the micro climate will result from the survey of the Heat Island and the Oxygen Concentration, used as indicator. To ensure the trustworthy result of research, it is calculated the critical influence of the wind velocity and the Land-to-Covearage Rate. As a result of comparative analysis, it could be confirmed that the local temperatures in all sets of the residential type were higher than the average temperature in Jeonju. But the housing type A 'exclusive use for housing zone' has relativly the most stable and best living condition. On the contrary the residential type B and D has the worst toward the oxygen concentration in the time zone 9-12 a.m., which didn't reach the minimum of the oxygen concentration $20.5{\%}.$ It means that the higer the development and population density is, the worse is the situation of the Quality of Life in the residential types in accordance with the heat island and oxygon con­centration.

The Classification of Spatial Patterns Considering Formation Parameters of Urban Climate - The case of Changwon city, South Korea - (도시기후 형성 요소를 고려한 공간유형 분류 -창원시를 대상으로 -)

  • Song, Bonggeun;Park, Kyunghun
    • Journal of Environmental Impact Assessment
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    • v.20 no.3
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    • pp.299-311
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    • 2011
  • The objective of this paper is to present a methodology for the classification of spatial patterns considering the parameters of urban form which play a significant role in the formation of the urban climate. The urban morphological parameters, i.e. building coverage, impervious pavement, vegetation, water, farmland and landuse types were used to classify the spatial patterns by a K-means cluster analysis. And the presented methodology was applied on Changwon city, South Korea. According to the results of cluster analysis, the total spatial patterns were classified as 24 patterns. First of all, The spatial patterns(A-1, A-2, A-3, B-1, B-2, B-3, C-1, C-2, C-3, D-1, D-2, D-3, E-1, E-2, E-3, F-1, F-2, F-3, G-1, G-2, G-3), which distributed in the rural area and the suburban area, can have the positive impacts of cold air generation and wind corridor on an urban climate environment, were distributed in the rural area. On the other hand, the spatial patterns of the downtown area including A-4, B-4, C-4 and D-4 are expected to have the negative impacts on urban climate owing to the of artificial heat emission or the wind flow obstruction. Finally, it will require the future research to analysis the climatic properties according to the same spatial patterns by the field survey.