• Title/Summary/Keyword: freezing during summer season

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A Geomorphological Study on the Distribution Areas of Freezing during Summer Season in Korea (한국의 하계 동결현상 분포지에 관한 지형학적 연구)

  • Jeon, Young-Gweon
    • Journal of the Korean association of regional geographers
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    • v.7 no.1
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    • pp.97-106
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    • 2001
  • There are a few interesting areas which show freezing during summer season in Korea, three of them are especially important. They are located at Milyang(Gyungnam province), Uisung and Chungsong(Gyungbook province). They are named Eoleumgol(ice-valley) or Binghyul(ice-cave). The purpose of this study is to clarify geomorphological and geological characteristics about the distribution areas of freezing during summer season in Korea in relation to previous works, which have been studied in hydrological or micro-climatological viewpoints. The main results are summarized as follows. 1) The main geomorphological and geological characteristics in the distribution areas of freezing during summer season (1) Thick debris accumulated slope within deep valley (2) North facing slope (3) The component debris of volcanic rock such as andesite or rhyolite 2) The ice-cave as a system that give rise to freezing phenomenon in summer season is closely related to talus slope. The ice-cave has thick accumulated debris and lots of vacant spaces within the rock deposits, some of vacant spaces are very big and connected with underground water system. 3) A partly freezing within underground water system is required freezing phenomenon in summer season. Judging from this point of view, two ideas are suggested; one is the evaporation theory, another is that the frozen condition in winter remains untill late summer.

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A Study on Cooling and Freezing During Summer Season in Deoksan-ri Eoreumgol (ice valley) Yeongdeok-gun (South Korea) (영덕군 덕산리 얼음골의 냉각 및 하계 결빙현상에 관한 연구)

  • Lee, Jin Kook;Shin, Jae Ryul;Jang, Yun Deuk
    • Journal of the Korean association of regional geographers
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    • v.21 no.3
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    • pp.608-617
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    • 2015
  • This paper synthetically analyzes micrometeorological data and geomorphological features of Doeksan-ri Eoreumgol(ice valley) Yeongdeok-gun in order to investigate occurrence characteristics of the ice valley and a mechanism for freezing in summer. This ice valley is located in the distal end of a talus and intensity of cooling and freezing in summer seems to be related to morphology and dimensions of talus. Cooling in the ice valley is generated by cold air flows that move down to the bottom of talus from high mountains through pores and voids, then debris in talus is supercooled by the cold air. For it forms a stable state in and around voids cold air is stagnating in the lower end of talus. This causes freezing in summer at outpour points. Furthermore humidity condition of external air and vaporization heat is a key factor when freezing.

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Hydrological Study of the Freezing in Summer Season at the Ice Valley, Korea (얼음골의 하계 결빙현상에 관한 수문학적 연구)

  • 배상근
    • Water for future
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    • v.23 no.4
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    • pp.459-466
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    • 1990
  • In the Ice Valley, it freeze in summer season. However, there is no ice during winter. In order to clarify the phenomenon of unusual temperature, numerical experiments were conducted using the coupled equations of fluid flow and heat transfer. The results demonstrated that temperature inversion in the Ice Valley is primarily due to delay of the groundwater temperature. Also, the results of the simulation suggest that major factors affecting the delay are the topographical configuration, geological factors and groundwater flow system, combined with groundwater recharge and discharge systems.

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Studies on the Properties of Simmental Semen I. With Special Reference to Collecting Semen During Summer (Simmental의 정액성상에 관한 연구 제1보, 정액의 하계수취를 중심으로)

  • 고광두;한두희;정길생
    • Korean Journal of Animal Reproduction
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    • v.5 no.2
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    • pp.43-48
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    • 1981
  • This experiment was carried out with the purpose to get some information about the properties of Simmental bull semen during summer season. The results obtained were summarized as follows: 1. Semen volume per ejaculation, sperm concentration and sperm viability were averaged 5.16ml, 6.6billion and 65%, respectively. 2. Percentage of motile sperm after dilution in skmmilk solution and trisbuffer for 5 days were 34.16% and 35.0%, respectively. 3. Viability of spermatozoa frozen in skimmilk extender and trisbuffer for 5 days were 20. 83% and 25.66%, respectively. 4. Percentage of live sperm, MRT and pH value were 71.8∼72.1%, 8.40∼8.21 minutes and 6.78, respectively. 5. Diluted semen showed strong resistance to the cold shock than that of fresh semen. 6. Rscovery of sperm motility after freezing for 24 hours was relatively weak.

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Mechanism for Bank Erosion and Local Scouring in Estuary of the Hangang River

  • Lee, Samhee;Han, Hyeongjun;Choo, Jeongho
    • Journal of Wetlands Research
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    • v.16 no.4
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    • pp.453-462
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    • 2014
  • The levee and bridge pier in estuary of the Hangang River are exposed in a dangerous condition due to bank erosion and local scouring occurred since the summer season in 2011. At first, it is presumed that the high sandbar formed in river channel of the study area was an important element in the occurrence of bank erosion and local scouring. It can be presumed that the record-breaking depth of freezing due to cold wave for the long term during the winter season between 2010 and 2011 as well as the heavy intensive rainfall of 2011 had a decisive effect on the first damage of A section. The second damage of B section mainly occurred around the bridge pier constructed on the high water channel before it was washed away during the winter season between 2011 and 2012. It is considered that the second damage was caused by ice formation and ice floes.

Seasonal and Regional Effects on Milk Composition of Dairy Cows in South Korea

  • Nam, Ki-Taeg;Kim, Ki-Hyun;Nam, In-Sik;Abanto, Oliver D.;Hwang, Seong-Gu
    • Journal of Animal Science and Technology
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    • v.51 no.6
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    • pp.537-542
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    • 2009
  • For a period of over 6 years, more than 160,000 milk samples were collected and analyzed to determine the influence of different seasonal temperatures and geographic regional location on milk composition in South Korea. Fat, protein, lactose, non fat milk solids (NFMS) and total solids (TS) contents were significantly higher among dairy cows milked in winter season than other seasons (p<0.05). In contrast, freezing point (FP), milk urea nitrogen (MUN) and somatic cell count (SCC) were significantly higher in summer season than other seasons (p<0.05). The average SCC in the autumn season was $358{\times}10^3$/ml, which was lower than any other seasons (p<0.05). These results may be due to the changes in temperature during different seasons. Meanwhile, milk produced by dairy cows in central region had higher fat, protein, lactose, NFMS, TS and MUN and had lower SCC compared to other regions (p<0.05). Fat, TS, FP, MUN and citric acid in northeast region were lower than other regions (p<0.05). The SCC was significantly higher in southeast region than those of other regions (p<0.05). As a result, it might be possible that the differences in feeding management in each different region may affect the milk composition. In conclusion, present results indicated that milk composition is clearly influenced by both season and regional location. Therefore, based on these results, development of different feeding systems, according to season and region is needed to produce high quality and satiable milk production.

Deterioration and Microclimate in the Shelter for the Gaetaesajiseokbulibsang (Standing Triad Buddha Statues in Gaetaesaji Temple Site), Nonsan, Korea (논산 개태사지석불입상의 손상도와 보호각 내부의 미기후 환경)

  • Kim, Ji-Young;Park, Sun-Mi;Lee, Chan-Hee
    • Journal of Conservation Science
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    • v.25 no.2
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    • pp.179-196
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    • 2009
  • The Gaetaesajiseokbulibsang (Treasure No. 219) consists of light gray and coarse to medium-grained granodiorite with feldspar phenocrysts in part. Magnetic susceptibility of the rock material was measured as 12.06(${\times}10^{-3}$ SI unit), being different from the granite($0.19{\times}10^{-3}$ SI unit) in the Mt. Cheonho. This indicates the raw material has been supplied from the outside. As a result of deterioration assessment, exfoliation of the Right Buddha, cement and dust of the Main Buddha were estimated as 35.2%, 21.1% and 25.0%. The ultrasonic velocity was measured as 2850.2m/s(Main Buddha), 2648.4m/s(Left Buddha) and 2644.5m/s(Right Buddha). The compressive strength calculated from the velocity showed low in the Right Buddha among three and the all pedestal parts which corresponds to the result of deterioration assessment. The indoor mean temperature and relative humidity of the shelter were $13.7^{\circ}C$ and 79.0%. It is evaluated that the indoor microclimate was stable and the shelter functioned to reduce climatic fluctuation of the outdoor. However, water condensation was occurred on the surface of the pedestal part during spring and summer, and freezing in winter season might also be done. These factors were probable to be a main cause of the surface exfoliation of the Triad Buddha Statues. Therefore, dehumidification and heating system in the shelter should be applied to prevent further deterioration.

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