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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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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 Mechanism of AMOC Decadal Variability in the HadGEM2-AO
Wie, Jieun ; Kim, Ki-Young ; Lee, Johan ; Boo, Kyung-on ; Cho, Chunho ; Kim, Chulhee ; Moon, Byung-kwon ;
Journal of the Korean earth science society, volume 36, issue 3, 2015, Pages 199~209
DOI : 10.5467/JKESS.2015.36.3.199
The Atlantic meridional overturning circulation (AMOC), driven by high density water sinking around Greenland serves as a global climate regulator, because it transports heat and materials in the climate system. We analyzed the mechanism of AMOC on a decadal time scale simulated with the HadGEM2-AO model. The lead-lag regression analysis with AMOC index shows that the decadal variability of the thermohaline circulation in the Atlantic Ocean can be considered as a self-sustained variability. This means that the long-term change of AMOC is related to the instability which is originated from the phase difference between the meridional temperature gradient and the ocean circulation. When the overturning circulation becomes stronger, the heat moves northward and decreases the horizontal temperature-dominated density gradients. Subsequently, this leads to weakening of the circulation, which in turn generates the anomalous cooling at high latitudes and, thereby strengthening the AMOC. In this mechanism, the density anomalies at high latitudes are controlled by the thermal advection from low latitudes, meaning that the variation of the AMOC is thermally driven and not salinity driven.
The Analysis of Regional Scale Topographic Effect Using MM5-A2C Coupling Modeling
Choi, Hyun-Jeong ; Lee, Soon-Hwan ; Kim, Hak-Sung ;
Journal of the Korean earth science society, volume 36, issue 3, 2015, Pages 210~221
DOI : 10.5467/JKESS.2015.36.3.210
The terrain features and surface characteristics are the most important elements not only in meteorological modeling but also in air quality modeling. The diurnal evolution of local climate over complex terrain may be significantly controlled by the ground irregularities. Such topographic features can affect a thermally driven flow, either directly by causing changes in the wind direction or indirectly, by inducing significant variations in the ground temperature. Over a complex terrain, these variations are due to the nonuniform distribution of solar radiation, which is highly determined by the ground geometrical characteristics, i.e. slope and orientation. Therefore, the accuracy of prediction of regional scale circulation is strong associated with the accuracy of land-use and topographic information in meso-scale circulation assessment. The objective of this work is a numerical simulation using MM5-A2C model with the detailed topography and land-use information as the surface boundary conditions of the air flow field in mountain regions. Meteorological conditions estimated by MM5-A2C command a great influence on the dispersion of mountain areas with the reasonable feature of topography where there is an important difference in orographic forcing.
Burial Age and Flooding-origin Characteristics of Coastal Deposits at Gwangseungri, Gochanggun, Korea
Kim, Jong Yeon ; Yang, Dong Yoon ; Shin, Won Jeong ;
Journal of the Korean earth science society, volume 36, issue 3, 2015, Pages 222~235
DOI : 10.5467/JKESS.2015.36.3.222
Samples were collected from both places including the coastal area within the height of 5 m above the mean sea level (msl) (DH) and the top of the coastal terrace of 10-15 m msl (KS) high in Gwangseungri, Gochanggun, Korea. To find the origin of the deposit in the coastal area, granulometric analysis and geochemical analysis were performed. The result showed that the DH samples were originated from the reddish soils overlaying weathered bedrock which presented gradual change of chemical composition from the bottom toward the top. Clay minerals were found from the DH samples. These results concluded that the DH samples were found as in-situ weathered materials. The KS samples were originated from the soil layer covering gravel layer at the foot slope of the hill along the coast. The KS samples contained different chemical compositions from the DH. It is inferred that some of this layer was disturbed or experienced the influx of foreign material. The particle size of the KS samples was different from those found on the beach. The particle size of lower parts of KS site was finer than that on the beach, but the particle size of middle part of the site was coarser than that on the beach. The sorting of the KS site was poorer than that on the beach. Thus, it is inferred that some parts of the layer were formed by short-lived high energy event rather than sustained and continuous action of tidal currents and/or waves. Analysis using an optically stimulated luminescence (OSL) method showed that the burial age of samples from KS site were found 0.65-0.71 ka. Though the characteristics of the sediment layer and forming event in this area should be further studied, it can be inferred that this sedimentary layer formed by coastal flooding with storm.
A Case Study of the Error of Paleontology Exhibition Datas in the Natural History Museums of Korea
Ko, Ju Yeong ;
Journal of the Korean earth science society, volume 36, issue 3, 2015, Pages 236~245
DOI : 10.5467/JKESS.2015.36.3.236
This study investigated the errors in presenting paleontology exhibition data in 9 natural history museums for 2 years and two months from 15, Aug. 2013 to 25, March 2015. It was found that seven natural history museums presented 28 difference cases of data in error. The purpose of this study was to investigate why the errors occurred and how to prevent the errors from occurring and finally how to correct the errors earlier. For this purpose, this study review related literatures using conference proceedings, books, conducted a survey via natural history museums. Results suggested five ways to correct errors in the future. First, it is suggested that the authorities of the museum increase the number of curators and have specialists participate in excavation and maintenance, research, preparation of the exhibition data through a collaboration with universities and research institutes. Second, it is also suggested that the authorities establish the classification system to use in the exhibition process and secure a job for their maintenance specialists. Third, the authorities of museum should put an examination process in place as a system by inviting the external experts into the exhibition process and also establish a process of collecting errors identified by any museum visitors. Fourth, the authorities of museum should make an efforts to increase the participating rate of correcting errors through SNS, Docent, and educational programs among the community members and students. Fifth, they also should use mass media to show and present the research-proven figures of paleontological fossils, which hopefully helps resolve issues of the prior unchanging cultural inertia.
The Development and Effects Analysis of the SMART Instructional Modules about Mineral Resource
Park, Su-Kyeong ; Jung, Areum ; Lee, Sang-Won ;
Journal of the Korean earth science society, volume 36, issue 3, 2015, Pages 246~257
DOI : 10.5467/JKESS.2015.36.3.246
The purpose of this study was to develop and apply three types SMART instructional modules about the mineral resources and investigate its effect. One hundred students in the experimental group and 111 students in the control group from 6 classes in the
year of a girl`s high school participated in this study. One unit of tablet PC was provided to every two students in the experimental group and three types of SMART classes were implemented in class. Teacher-centered traditional classes were carried out for the control group. The instrument designed to assess the level of students` interest in mineral resources consisted of 10 items using 5-point Likert scale. To investigate the level of students` understanding, 15 items were developed on the mineral, mineral deposits, and the development of mineral resources. In addition, the participants were asked to describe advantages and disadvantages of the classes using the SMART modules. Results are as follows. First, participants in the experimental group showed a significantly higher level of interest on the mineral and the mineral learning than those in the control group. However, there was no significant difference between the two groups in terms of the desire to observe minerals and rocks. Second, students in the experimental group showed a higher level of understanding than the control group. The students with higher learning ability showed a significantly higher level of understanding than the lower group students. Third, the participants pointed out that the advantage of the SMART instructional modules was their experience in searching the relevant information and producing diverse outputs about mineral resource. On the contrary, the difficulties in coordinating opinions and decision making due to the excessive quantity of information were perceived as the disadvantage.
An Analysis of the Change of Secondary Earth Science Teachers` Knowledge about the East Sea`s Currents through Drawing Schematic Current Maps
Park, Kyung-Ae ; Park, Ji-Eun ; Lee, Ki-Young ; Choi, Byoung-Ju ; Lee, Sang-Ho ; Kim, Young-Taeg ; Lee, Eun-Il ;
Journal of the Korean earth science society, volume 36, issue 3, 2015, Pages 258~279
DOI : 10.5467/JKESS.2015.36.3.258
The purpose of this study was to analyze the change of secondary earth science teachers` knowledge about the currents of the East Sea through drawing of a schematic map of oceanic currents. For this purpose, thirty two earth science teachers participated in the six-hour long training of learning and practice related to ocean current schematic map. The teacher participants performed drawing of the ocean current schematic map of the East Sea in three different phases, i.e.; pre-, post-, and delayed-post phase. In addition, all the maps conducted by participants were converted to digitalized image data. Detailed analysis were performed to investigate participating teachers` knowledge about the currents of the East Sea. Findings are as follows: First, the teacher participants have background knowledge about the ocean current map, but it reveals an incorrect knowledge about some concepts. Second, after teacher training, teachers` knowledge increased about the East Sea`s currents, while a decrease was found in the differences between individual teachers` knowledge. This pattern was more evident in the delayed-post phase of drawing than in the post-phase occurred immediately after training. Third, the teacher participants were strongly aware of the need to improve the ocean current schematic map of the East Sea in science textbook in terms of scientific knowledge. In addition, they showed a high level of satisfaction about teacher training because they perceived that it was meaningful in various aspects; recognizing the importance of content knowledge and conjunction with instructional strategies, the needs of secondary science curriculum, and recognition of the nature of scientific knowledge. The results imply that teachers` subject matter knowledge plays a significant role to make science teaching effective.
The Effects of an Instruction Using Geologic Planar Figures on High School Students` Ability of Spatial Visualization and Geologic Spatial Ability
Park, Jaeyong ; Lee, Kiyoung ;
Journal of the Korean earth science society, volume 36, issue 3, 2015, Pages 280~299
DOI : 10.5467/JKESS.2015.36.3.280
The purpose of this study was to investigate the effects of an instruction using geologic planar figures on high school students` ability of spatial visualization and geologic spatial ability and also to explore its applicability as an instructional strategy through the investigation of students` perception about the instruction using mixed methodology. For this purpose, we developed 10 planar figures of geologic structures (2 horizontal layers, 2 vertical layers, 4 angular layers, 1 fault, and 1 fold), and tested students` spatial visualization ability and geologic spatial ability before and after the implementation in class. In addition, in order to investigate students` perception on the instruction, we conducted quantitative research using questionnaires comprised of the cognitive and the affective domain, and followed by focus group interview that was conducted to obtain deeper understanding of their perception. Findings revealed that the instruction using geologic planar figures was effective to enhance spatial visualization ability and geologic spatial ability. It was also helpful for students to enhance their ability to perceive the spatial configuration of the geologic structures as well as the ability to penetrate visually into the images of the structures. The results of the students` perception on the instruction showed that the students recognized the instruction using geologic planar figures as a strongly positive teaching method both in the cognitive and affective domain. We concluded that geologic planar figures could be used as an effective tool for the lesson of `mapping and interpreting of geological map`, and be highly applicable for the advanced class in high schools.