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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean earth science society
Journal Basic Information
Journal DOI :
The Korean Earth Science Society
Editor in Chief :
Volume & Issues
Volume 36, Issue 7 - Dec 2015
Volume 36, Issue 6 - Oct 2015
Volume 36, Issue 5 - Sep 2015
Volume 36, Issue 4 - Aug 2015
Volume 36, Issue 3 - Jun 2015
Volume 36, Issue 2 - Apr 2015
Volume 36, Issue 1 - Feb 2015
Selecting the target year
A Case Study on the Impact of Ground-based Glaciogenic Seeding on Winter Orographic Clouds at Daegwallyeong
Yang, Ha-Young ; Chae, Sanghee ; Jeong, Jin-Yim ; Seo, Seong-Kyu ; Park, Young-San ; Kim, Baek-Jo ;
Journal of the Korean earth science society, volume 36, issue 4, 2015, Pages 301~314
DOI : 10.5467/JKESS.2015.36.4.301
The purpose of this study was to investigate the impact of ground-based glaciogenic seeding on orographic clouds in the Daegwallyeong area on 13 March, 2013. The experiments was conducted by releasing silver iodide (AgI) under following conditions: surface temperature below
, wind direction between 45 and
, and wind speed less than
. Two seeding rates,
(SR2), were tested to obtain an appropriate AgI ratio for snowfall enhancement in the Daegwallyeong area. Numerical simulations were carried out by using the WRF (Weather Research and Forecast) model with AgI point-source module which predicted dispersion fields of AgI particles. The results indicated that the target orographic clouds contained adequate amount of supercooled liquid water and that the dispersion of AgI particles tended to move along the prevailing wind direction. To validate the seeding effects, the observation data from FM-120 and MPS as well as PARSIVEL disdrometer were analyzed. In this case study, glaciogenic seeding significantly increased the concentration of small ice particles below 1 mm in diameter. The observation results suggest that SR1 seeding be reasonable to use the ground-based seeding in the Daegwallyeong area.
Characteristics of Meteorological Variables in the Leeward Side associated with the Downslope Windstorm over the Yeongdong Region
Cho, Young-Jun ; Kwon, Tae-Yong ; Choi, Byoung-Cheol ;
Journal of the Korean earth science society, volume 36, issue 4, 2015, Pages 315~329
DOI : 10.5467/JKESS.2015.36.4.315
We investigated the characteristics of meteorological conditions related to the strong downslope wind over the leeward side of the Taebaek Mountains during the period 2005~2010. The days showing the strong wind exceeding
in Gangwon province were selected as study cases. A total of 15 days of strong wind were observed at Sokcho, Gangneung, Donghae, and Taebaek located over the Yeongdong region. Seven cases related to tropical cyclone (3 cases) and heavy snowfall (2 cases) and heavy rainfall (2 cases) over the Yeongdong region were excluded. To investigate the characteristics of the remaining 8 cases, we used synoptic weather chart, Sokcho radiosonde, Gangneung wind profiler and numerical model. The cases showed no precipitation (or
). From the surface and upper level weather chart, we found the pressure distribution of southern high and northern low pattern over the Korean peninsula and warm ridge over the Yeongdong region. Inversion layer (or stable layer) and warm ridge with strong wind were located in about 1~3 km (925~700 hPa) over mountains. The Regional Data Assimilation and Prediction System (RDAPS) indicated that warm core and temperature ridge with horizontal temperature gradient were
which were located on 850 hPa pressure level above mountaintop. These results were summarized as a forecasting guidance of downslope windstorm in the Yeongdong region.
Estimation of Total Cloud Amount from Skyviewer Image Data
Kim, Bu-Yo ; Jee, Joon-Bum ; Jeong, Myeong-Jae ; Zo, Il-Sung ; Lee, Kyu-Tae ;
Journal of the Korean earth science society, volume 36, issue 4, 2015, Pages 330~340
DOI : 10.5467/JKESS.2015.36.4.330
For this study, we developed an algorithm to estimate the total amount of clouds using sky image data from the Skyviewer equipped with CCD camera. Total cloud amount is estimated by removing mask areas of RGB (Red Green Blue) images, classifying images according to frequency distribution of GBR (Green Blue Ratio), and extracting cloud pixels from them by deciding RBR (Red Blue Ratio) threshold. Total cloud amount is also estimated by validity checks after removing sunlight area from those classified cloud pixels. In order to verify the accuracy of the algorithm that estimates total cloud amount, the research analyzed Bias, RMSE, and correlation coefficient compared to records of total cloud amount earned by human observation from the Gangwon Regional Meteorological Administration, which is in the closest vicinity of the observation site. The cases are selected four daily data from 0800 LST to 1700 LST for each season. The results of analysis showed that the Bias in total cloud amount estimated by the Skyviewer was an average of -0.8 tenth, and the RMSE was 1.6 tenths, indicating the difference in total cloud amount within 2 tenths. Also, correlation coefficient was very high, marking an average of over 0.91 in all cases, despite the distance between the two observation sites (about 4 km).
Exploring Geosites Considering Geological Characteristics of the Gochang-gun Area, Korea
Cho, Kyu-Seong ; Hong, Deok-Pyo ; Park, Kyeong-Jin ;
Journal of the Korean earth science society, volume 36, issue 4, 2015, Pages 341~350
DOI : 10.5467/JKESS.2015.36.4.341
This study is to explore geosites considering the geological characteristics in Gochang-gun and to investigate a possibility of being designated as the national geopark of Korea. In this study, the geosites within Gochang-gun are explored through literature search and field work. The results indicate that seven of the geosites in the Seonunsan area are relevant as potential national geopark, including Jinheunggul, Dosolam Maebulsang, Youngmungul, Nakjodae and Cheonmabong, Byungbawi, spherulitic rhyolite, and Dolmen site. In addition, there are other areas that have valus in terms of geological and educational aspect, including Hajeon mud flat and Myoungsasipri beach. The results of study imply that if various educational programs for the geotourism are properly developed, the Gochang-gun area has potential to be designated as the national geopark of Korea.
An Analysis of the Sensitivity of Input Parameters for the Seismic Hazard Analysis in the Korean Peninsula
Kim, Min-Ju ; Kyung, Jai-Bok ;
Journal of the Korean earth science society, volume 36, issue 4, 2015, Pages 351~359
DOI : 10.5467/JKESS.2015.36.4.351
This study is to analyze the sensitivity for the parameters (a and b values,
, attenuation formula, and seismo-tectonic model) which are essential for the seismic hazard map. The values of each parameter were suggested by 10 members of the expert group. The results show that PGA increases as a value and
become larger and as b value smaller. Big impact on the seismic hazard is observed for attenuation formula, a and b values although there is little impact on
and seismo-tectonic model. These parameters with big impact require careful consideration for obtaining adequate values that well reflects the seismic characteristics of the Korean peninsula.
The Effects of STEAM Program Using Landslide on High School Students' Affective Domain
Lee, Jungju ; Wee, Soomeen ;
Journal of the Korean earth science society, volume 36, issue 4, 2015, Pages 360~366
DOI : 10.5467/JKESS.2015.36.4.360
The purpose of this study was to find out the effects of STEAM program on affective domain in high school students. For this purpose, we developed a STEAM program based on 'Landslide and Life' and applied it to 16 members of science club in high school for 7 weeks. We conducted a pre- and post-test of students' scientific attitude in affective domain. We also conducted a survey and in-depth interview about the STEAM program after the implementation of the program. Regarding scientific attitude, the STEAM program found positive on students' increased interest, value, confidence, and general attitude about science. Results of the program evaluation questionnaire, depicted that the most response was made to an item that the program was much helpful in affective domain and that there were positive changes in cognitive domain.
Development and Application of an Experimental Program for Mapping Temperature and Salinity Distribution around the Korean Marginal Seas Using Ocean Data View
Chang, You-Soon ;
Journal of the Korean earth science society, volume 36, issue 4, 2015, Pages 367~389
DOI : 10.5467/JKESS.2015.36.4.367
This study developed an experimental program for mapping temperature and salinity distribution around the Korean marginal seas using Ocean Data View (ODV) software. Serial ocean observational data have been analyzed after being converted to the ODV compatible format using a separated program newly developed for this study. When this new experimental program was applied to 65 pre-service teachers, it was found that the quality of assignment completion with a new program improved compared with that of the same group who used the existing program. A questionnaires was employed to delve into participants' satisfaction of the new program. Findings depicted that accurate and quick drawing of isoline drew the highest responses of satisfaction, and confirmed positive responses to the understanding and application of this new experimental program.
Exploration of Discursive-Epistemic Mechanisms in High School Earth Science Lessons
Oh, Phil Seok ; Ahn, Yumin ;
Journal of the Korean earth science society, volume 36, issue 4, 2015, Pages 390~403
DOI : 10.5467/JKESS.2015.36.4.390
The purpose of this study was to explore discursive-epistemic mechanisms in high school earth science lessons. A total of 11 video recordings of earth science lessons were collected from three inservice high school teachers. The video recordings were all transcribed and analyzed by employing the discourse analysis framework used in relevant previous studies. In analysis, we identified discursive-epistemic mechanisms as functional assemblies for fulfilling particular epistemic functions in the earth science lessons. The characteristics of these mechanisms were described according to their epistemic functions. The findings of the study were compared with those of previous studies to highlight the characteristics of discursive-epistemic mechanisms in the earth science classrooms. Analyses of middle school science lessons and of science lessons in alternative forms, as well as studies using extended research methods such as indepth interviews with teachers, were suggested as implications for future research.
Characteristics of High School Students' and Science Teachers' Cognitive Frame about Effective Teaching Method for High School Science Subject
Park, Kyeong-Jin ; Lee, Jun-Ki ; Chung, Duk Ho ;
Journal of the Korean earth science society, volume 36, issue 4, 2015, Pages 404~416
DOI : 10.5467/JKESS.2015.36.4.404
We investigated the cognitive frame of high school students and inservice high school science teachers about effective teaching method, and we also explored how they understood about the teaching methods suggested by the 2009 revised Science Curriculum. Data were collected from 275 high school science teachers and 275 high school students. We analyzed data in terms of the words and the cognitive frame using the Semantic Network Analysis. The results were as follows. First, the teachers perceived that an activity oriented class was the effective science class that helped improve students' problem-solving abilities and their inquiry skills. The students had the cognitive frame that their teacher had to present relevant and enough teaching materials to students, and that they should also receive assistance from teachers in science class to better prepare for college entrance exam. Second, both students and teachers retained the cognitive frame about the efficient science class that was not reflected 2009 revised Science Curriculum exactly. Especially, neither groups connected the elements of 'convergence' as well as 'integration' embedded across science subject areas to their cognitive frame nor cognized the fact that many science learning contents were closed related to one another. Therefore, various professional development opportunities should be offered so that teachers succinctly comprehend the essential features and the intents of the 2009 revised Science Curriculum and thereby implement it in their science lessons effectively.