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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 26, Issue 8 - Dec 2005
Volume 26, Issue 7 - Oct 2005
Volume 26, Issue 6 - Aug 2005
Volume 26, Issue 5 - Jun 2005
Volume 26, Issue 4 - May 2005
Volume 26, Issue 3 - Apr 2005
Volume 26, Issue 2 - Mar 2005
Volume 26, Issue 1 - Feb 2005
Selecting the target year
The Land Surface Temperature Distributions of Jeju Island using Landsat 7/ETM+ Data
Lee Byung-Gul ;
Journal of the Korean earth science society, volume 26, issue 2, 2005, Pages 109~113
In this study, the estimation of the temperature distribution of Jeju Island with coastal ocean derived from the thermal band of Landsat 7/ETM+ of January 6, 2003 was carried out. For the computation of the temperature of the island and the coastal ocean based on the thermal band, we used NASA method wiich is the 8 bit Digital Number(DN) converted into spectral radiance. The computed results showed that the land temperature variations were from 0 to 12 Celsius degrees, and a good agreement with the observation ones based on the method. However, the ocean surface temperature was not much changed ground 15 degree since the water was well mixed between the coastal and the offshore ocean. The interesting results were that the temperature distributions of the southern part(Seogwipo City) of Jeju Island were higher than those of the north one(Jeju City) by more than 2 Celsius degree at the same height although the distance between the Jeju and the Seogwipo is only about 35km in winter season. The reason was found that the solar irradiance intensity of the south part was stronger than the north one by Halla mountain in winter season only. From the results, we found that the seasonal variations of solar irradiation and the height of Mt. Halla were an important role of temperature distribution of Jeju Island.
Application of Fuzzy Information Representation Using Frequency Ratio and Non-parametric Density Estimation to Multi-source Spatial Data Fusion for Landslide Hazard Mapping
Park No-Wook ; Chi Kwang-Hoon ; Kwon Byung-Doo ;
Journal of the Korean earth science society, volume 26, issue 2, 2005, Pages 114~128
Fuzzy information representation of multi-source spatial data is applied to landslide hazard mapping. Information representation based on frequency ratio and non-parametric density estimation is used to construct fuzzy membership functions. Of particular interest is the representation of continuous data for preventing loss of information. The non-parametric density estimation method applied here is a Parzen window estimation that can directly use continuous data without any categorization procedure. The effect of the new continuous data representation method on the final integrated result is evaluated by a validation procedure. To illustrate the proposed scheme, a case study from Jangheung, Korea for landslide hazard mapping is presented. Analysis of the results indicates that the proposed methodology considerably improves prediction capabilities, as compared with the case in traditional continuous data representation.
Validation of Salinity Data from ARGO Floats: Comparison between the Older ARGO Floats and that of Later Deployments
Youn Yong-Hoon ; Lee Homan ; Chang You-Soon ; Thadathil Pankajakshan ;
Journal of the Korean earth science society, volume 26, issue 2, 2005, Pages 129~136
Continued observation of ARGO floats for years(about 4 years) makes the conductivity sensor more vulnerable to fouling by marine life and associated drift in salinity measurements. In this paper, we address this issue by making use of floats deployed in different years. Floats deployed in the East Sea and the Indian Ocean are examined to find out float-to-float match-ups in such a way that an older float pops up simultaneously with a newer deployment (with tolerable space-time difference). A time difference of less than five days and space difference of less than 100km are considered for the match-up data sets. For analysis of the salinity drift under the stable water mass, observations of the floats from deepest water masses have been used. From the cross-check of ARGO floats in the East Sea and the Indian Ocean, it is found that there is a systematic drift in the older float compared to later deployments. All drift results, consistently show negative bias indicating the typical nature of drift from fouled sensors. However, the drift is much less than 0.01, the specified accuracy of ARGO program.
Graptolites from the Jigunsan Shale of Taebaeg Area, Korea
Kim Jeong Yul ; Kwon Ji Yeun ; Kim Kyung-Soo ; Cho Hyun Su ;
Journal of the Korean earth science society, volume 26, issue 2, 2005, Pages 137~148
Five species of graptolites were discovered from the Jigunsan Shale of Taebaeg area, Korea. They are herein described as Archiclimacograptus riddellensis (Harris, 1924), Pseudamplexograptus distichus(Eichwald, 1840), Hustedograptus teretiusculus(Hisinger) sensu Jaanusson, 1960, Hustedograptus vikarbyensis (Jaanusson, 1960), and Hustedograptus sp. The graptolite assemblage from the Jigunsan Shale corresponds to those of the Pseudamplexograptus distichus zone in the Baltic and German areas and the geologic age of graptolites bearing beds of the Jigunsan Shale might be late Middle Llanvirn.
Characteristics of MODIS Satellite Data during Fog Occurrence near the Inchon International Airport
Yoo Jung-Moon ; Kim Young-Mi ; Ahn Myoung-Hwan ; Kim Yong-Seung ; Chung Chu-Yong ;
Journal of the Korean earth science society, volume 26, issue 2, 2005, Pages 149~159
Simultaneous observations of MODIS (Moderate-resolution Imaging Spectroradiometer) onboard the Aqua and Terra satellites and weather station at ground near the Inchon International Airport (37.2-37.7 N, 125.7-127.2 E) during the period from December 2002 to September 2004 have been utilized in order to analyze the characteristics of satellite-observed infrared (IR) and visible data under fog and clear-sky conditions, respectively. The differences
in brightness temperature between
were used as threshold values for remote-sensing fog (or low clouds) from satellite during day and night. The
value during daytime was greater by about 21 K when it was foggy than that when it was clear, but during nighttime fog it was less by 1.5 K than during nighttime clear-sky. The value was changed due to different values of emission of fog particles at the wavelength. Since the near-IR channel at
was affected by solar and IR radiations in the daytime, both IR and visible channels (or reflectance) have been used to detect fog. The reflectance during fog was higher by 0.05-0.6 than that during clear-sky, and varied seasonally. In this study, the threshold values included uncertainties when clouds existed above a layer of fog.
Spectral line Variations of the Symbiotic Variable CH Cygni
Yoo Kye Hwa ; Kim Kang Min ; Lee Byung Chul ; Yoon Tae Seog ; Lee Jung Ae ; Kang Yong Hee ;
Journal of the Korean earth science society, volume 26, issue 2, 2005, Pages 160~165
A series of high resolution spectra of CH Cygni obtained at the Bohyunsan Optical Astronomy Observatory (BOAO) in April 2004 has been analyzed. The emission components of the [O I] 6300 A lines are de-convoluted and fitted with Gaussian functions in order to investigate the characteristics and the structure of CH Cygni system along with the analysis for
and [O III] lines. A present geometrical structure of the components of CH Cygni system is suggested.
Fossil Albizia Legume (Mimosaceae) from the Miocene Duho Formation of the Yeonil Group in the Pohang Area, Korea
Kim Jong-Heon ;
Journal of the Korean earth science society, volume 26, issue 2, 2005, Pages 166~171
Fossil legumes of Albizia miokalkora Hu et Chaney (Mimosoideae) were found in the Miocene Duho Formation of the Yeonil Group distributed along the coast of Yeonil Bay in the Pohang area. The legume is flat and long and has 5-7 rounded seeds. The legumes of Albizia miokalkora are rare in the Cenozoic floras of the world and only known to Middle Miocene of East Asia. The fossil Albizia may use one of the important taxa to construct the biogeographic history of East Asia. This discovery is the first record of Albizia from the Neogene strata of Korea.