FullText URL esr_026_cover_j.pdf
Publication Title Okayama University Earth Science Report
Published Date 2019-12-27
Volume volume26
Issue issue1
ISSN 1340-7414
language 日本語
Copyright Holders © 2019 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
FullText URL esr_026_colophon.pdf
Publication Title Okayama University Earth Science Report
Published Date 2019-12-27
Volume volume26
Issue issue1
ISSN 1340-7414
language 日本語
Copyright Holders © 2019 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
JaLCDOI 10.18926/ESR58577
Title Alternative Synoptic climatological analyses of daily precipitation features and atmospheric fields in warm season relating to the precipitation difference between Kochi and Okayama characterizing the Seto Inland Sea Climate in Japan
FullText URL esr_026_037_049.pdf
Author Kato, Kuranoshin| SUGIMURA, Yuki| MATSUMOTO, Kengo|
Abstract In order to re-examine the formation process of the climatological precipitation difference between Kochi (Pacific side of Shikoku District) and Okayama (Seto Inland Sea side) characterizing the Seto Island Sea Climate in warm season, synoptic climatological analyses of the daily precipitation features and atmospheric fields were performed for the warm season (April to September) of 1985 - 2015, based on the daily and hourly precipitation data and weather maps by the Japan Meteorological Agency (JMA), and the NCEP/NCAR re-analysis data. The large climatological difference of precipitation at Kochi from that at Okayama throughout the warm season was greatly contributed to by the days with the precipitation difference between Kochi and Okayama (ΔPR) with greater equal to 30 mm/day. In addition, such large daily ΔPR was mainly due to the intense rainfall at Kochi with greater equal to 10mm/h throughout the warm season, except for a part of the cases in April when the “not so intense rain” with less than 10mm/h at Kochi contributed to the large ΔPR. However, it is noted that the features of the synoptic-scale atmospheric fields and possible roles of the mountain ranges in Shikoku District causing the large ΔPR were rather different among August (midsummer), September (Autumn rainfall season) and April (Spring) .
Keywords Daily precipitation climatology Climate around Japan Seto Inland Sea Climate in Japan Synoptic climatology
Publication Title Okayama University Earth Science Report
Published Date 2019-12-27
Volume volume26
Issue issue1
Start Page 37
End Page 49
ISSN 1340-7414
language 日本語
Copyright Holders © 2019 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
JaLCDOI 10.18926/ESR/58576
Title Alternative Interdisciplinary ESD lesson study for the university students with attention to the difference of climate and seasonal feeling in “summer” among Germany, northern Europe and Japan
FullText URL esr_026_026_036.pdf
Author KATO, Kuranoshin| KATO, Haruko| OTANI, Kazuo| MATSUMOTO, Kengo|
Abstract Climatological features and seasonal feeling in the season called by the same word such as “summer”would be rather different from region to region. Comparison of these features among the different regions, including the regions which are not so familiar to the students, would help to promote their fundamental ESD literacy, especially relating to the “Understanding of heterogeneous others”. Based on that concept, this paper will report an interdisciplinary lesson study for the university students on a theme how different the summertime climate and seasonal feeling among Germany, northern Europe and Japan are. In this study, the lesson practice was made in 2015 and 2018. In both classes, after the lecture on the summertime climate and seasonal feeling in these regions, the students created substitute songs with use of the melody of “Alles neu macht der Mai” (“The May makes all things new”, the same melody as a Japanese school song “Butterfly”) for the comparison between Germany and Japan. As for that between northern Europe, the melody of a Japanese school song “Furu-Sato” (“My country home”) was used for the creation of the substitute songs. It is noted that, not only the seasonal mean temperature or solar radiation condition, but also the features in association with the large day-to-day temperature variation was strongly reflected in the students’ works.
Keywords Interdisciplinary collaboration between climate and cultural understanding education ESD Comparative climatology Regional difference of summer climate
Publication Title Okayama University Earth Science Report
Published Date 2019-12-27
Volume volume26
Issue issue1
Start Page 25
End Page 36
ISSN 1340-7414
language 日本語
Copyright Holders © 2019 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
JaLCDOI 10.18926/ESR/58575
Title Alternative Schistose fault related rocks from the Sangun Metamorphic Rocks, Kawakita area, Misaki Town, Okayama Prefecture, SW Japan
FullText URL esr_026_019_024.pdf
Author MATSUSHITA, Mirei| SUZUKI, Shigeyuki|
Abstract The crystalline schist which is representatively exposed in the Innerside of Southwest Japan is called the Sangun Metamorphic Rocks (SMR). In Kawakita area, Misaki Town, Okayama Prefecture, schistose fault rocks which is newly described in below are intercalated in the SMR. The rocks are composed of lenticular fragments of pelitic, basic siliceous rocks and quartz vein with siliceous to pelitic matrix. The fine-grained muscovites which define schistosity penetrate the rocks. Major direction of layer which though to reflect slip plane is subparallel to the schistosity. The long axis of some fragments are slightly oblique to the schistosity. The combination of the two sets of planes is considered to be a composite planar fabric. These occurrences suggest that the rocks are fault rock before the Sangun Metamorphism and named as schistose fault rocks. Lenses of cataclasite and myronite are accompanied. Planar thin (about 10cm in thickness) brittle fault rock is also associated. These shear deformed rocks form units of layer (shear zone) of 10 to 100m in thickness, and are concordantly intercalated in the surrounded normal schists. Active periods of the shear zones had several times from before and after the event of the Sangun Metamorphism.
Keywords Sangun Metamorphic Rocks regional metamorphism shear deformation schistose fault rock
Publication Title Okayama University Earth Science Report
Published Date 2019-12-27
Volume volume26
Issue issue1
Start Page 19
End Page 24
ISSN 1340-7414
language 日本語
Copyright Holders © 2019 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
JaLCDOI 10.18926/ESR/58574
Title Alternative Computation of non-linear site response by the time-domain finite-difference method
FullText URL esr_026_001_017.pdf
Author TORIGOE, Yusuke| KOMATSU, Masanao| TAKENAKA, Hiroshi|
Abstract We have developed a time-domain staggered-grid finite-difference code for modeling non-linear response of a one-dimensionally inhomogeneous subsurface structure to a SH plane-wave incidence. It employs the velocity-stress formulation of elastodynamic equation for the linear part, and adopts a elastoplastic rheology model for the non-linear relation between the stress and strain. In this paper, we apply this code to four constitutive models from linear-elastic to nonlinear: (1) linear elastic model, (2) linear viscoelastic model, (3) elastoplastic model, and (4) viscoelastoplastic model, which simulate shallow sand and clay structures and are vibrated by a vertically incident SH plane-wave of Ricker wavelet, to compare the linear and the non-linear soil behaviors including low strains damping (viscoelastic effect) and/or hysteretic attenuation (non-linear effect). We also apply it to a local strong-motion record of the 2000 Western-Tottori earthquake (MW6.8). We then simulate characteristics of non-linear site response such as reduction of the spectral amplitude in the high frequency band and shift of the peak frequencies to lower frequencies.
Keywords finite-difference method non-linear site response strong motion
Publication Title Okayama University Earth Science Report
Published Date 2019-12-27
Volume volume26
Issue issue1
Start Page 1
End Page 17
ISSN 1340-7414
language 日本語
Copyright Holders © 2019 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
FullText URL esr_026_titlepage.pdf
Publication Title Okayama University Earth Science Report
Published Date 2019-12-27
Volume volume26
Issue issue1
ISSN 1340-7414
language 英語
Copyright Holders © 2019 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
FullText URL esr_026_cover.pdf
Publication Title Okayama University Earth Science Report
Published Date 2019-12-27
Volume volume26
Issue issue1
ISSN 1340-7414
language 英語
Copyright Holders © 2019 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
FullText URL esr_025_contents.pdf
Publication Title Okayama University Earth Science Report
Published Date 2018-12-27
Volume volume25
Issue issue1
ISSN 1340-7414
language 日本語
Copyright Holders © 2018 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
FullText URL esr_025_colophon.pdf
Publication Title Okayama University Earth Science Report
Published Date 2018-12-27
Volume volume25
Issue issue1
ISSN 1340-7414
language 日本語
Copyright Holders © 2018 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
JaLCDOI 10.18926/ESR/56695
FullText URL esr_025_039_048.pdf
Author Knittel, Ulrich| Walia, Monika| Suzuki, Shigeyuki| Lee, Yuan-Hsi|
Abstract The high-P/low-T Sanbagawa Metamorphic Belt that traverses SW Japan, has been subdivided into two belts thought to have been metamorphosed at ca. 120 Ma and at ca. 65 Ma (‘Sanbagawa Metamorphic Rocks’ and ‘Shimanto Metamorphic Rocks’). The subdivision was based on the assumption that metamorphism occurred at ca. 116 Ma, largely based on an early Rb-Sr isotope study and zircon data obtained for the eclogite unit of the Sanbagawa Belt, whereas in some parts of the belt detrital zircons of late Cretaceous age (90-80 Ma) were discovered. Analysis of detrital zircons sampled from two sites within the area considered to expose the older ‘Sanbagawa Metamorphic Rocks’, including the area investigated by the Rb-Sr study, reveals the presence of zircons younger than 95 Ma in all samples and some grains as young as 80 ± 4 Ma. It is therefore concluded that the Sanbagawa Belt is one single tectonic entity that formed in the Late Cretaceous though it contains older components, including fossiliferous clasts, older basic meta-volcanics and eclogite units that may record earlier metamorphic events.
Keywords U-Pb zircon dating Sanbagawa Metamorphic Belt Late Cretaceous Asemi River
Publication Title Okayama University Earth Science Report
Published Date 2018-12-27
Volume volume25
Issue issue1
Start Page 39
End Page 48
ISSN 1340-7414
language 英語
Copyright Holders © 2018 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
JaLCDOI 10.18926/ESR/56694
FullText URL esr_025_031_038.pdf
Author Amano, Hideki| Suzuki, Shigeyuki| Sato, Masaru| Yanagida, Makoto|
Abstract The study area is situated in Japan Sea side margin of the Shakotan Peninsula, Hokkaido, Japan, where MIS5e Terrace is preserved along the cost. Numbers of tight drilling have done to establish new method for terrace analysis. Buried wave cut terrace and sea cliff (when the MIS5e Terrace was formed) are reconstructed by distribution of the terrace deposits and these bottom of unconformity planes. The precise site and altitude of former shoreline was also obtained. Altitudes of the former shoreline from the 7 sections are almost the same 22 to 27m in height. Previous data of the height of shoreline are obtained from the topographic MIS5e Terrace surface. The altitudes have variation from 30m to 60m. It suggests that the traditional method for the MIS5e terrace analysis had some errors in the study area.
Keywords MIS5e marine terrace terrace deposits tight drilling shoreline
Publication Title Okayama University Earth Science Report
Published Date 2018-12-27
Volume volume25
Issue issue1
Start Page 31
End Page 38
ISSN 1340-7414
language 英語
Copyright Holders © 2018 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
JaLCDOI 10.18926/ESR/56693
Title Alternative Development of an interdisciplinary study plan on the seasonal transition from autumn to winter around the Japan Islands (Through the lesson study at junior high school with attention to the shallow convective rainfall “Shi-gu-re” in the cold air outbreak situations in early winter)
FullText URL esr_025_019_030.pdf
Author Kato, Kuranoshin| Nishikawa, Sari| Nakakura, Toshimi|
Abstract An interdisciplinary study plan on the seasonal transition from autumn to winter around the Japan Islands and the “seasonal feeling” associated with the shallow convective rainfall “Shi-gu-re” in that stage expressed in the Japanese classic poems called “Wa-ka” was developed, through a lesson study at junior high school. In that study plan, special attention was paid to the seasonal evolution of the larger-scale systems from autumn to winter, such as the Siberian air mass and the Siberian high, and the relation to the cold air intrusion into the Japan Sea and the Japan Islands. According to the analysis of the lesson practice results, students seem to understand that the winter-type weather pattern becomes dominant around November, together with the features of the intermittent rainfall in the winter-type pressure pattern called “Shi-gu-re” expressed in the “Wa-ka”. However, necessity of further improvement of the study plan was pointed out, so that the students can understand more exactly the role of the seasonal development of the Siberian high and Siberian air mass in the climate around the Japan Islands.
Keywords Interdisciplinary collaboration between climate and cultural understanding education Climate environment around Japan Transition from autumn to winter around Japan “Seasonal feeling” in early winter expressed in the Japanese classic literature ESD
Publication Title Okayama University Earth Science Report
Published Date 2018-12-27
Volume volume25
Issue issue1
Start Page 19
End Page 30
ISSN 1340-7414
language 日本語
Copyright Holders © 2018 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
JaLCDOI 10.18926/ESR/56692
Title Alternative Synoptic climatological analyses on the large day-to-day variation of air temperature around Germany in winter (Relating to the “seasonal feeling” in “Fasnacht”, the festival for driving the winter away)
FullText URL esr_025_007_017.pdf
Author Hamaki, Tatsuya| Kato, Kuranoshin| Otani, Kazuo| Kato, Haruko| Matsumoto, Kengo|
Abstract Synoptic climatological analyses associated with the large day-to-day variation of air temperature around Germany in winter were performed based mainly on the NCEP/NCAR reanalysis data for 2000/2001 to 2010/2011 winters, with an interest in the relationship to the “seasonal feeling” in “Fasnacht”, the festival for driving the winter away. The intermittent appearance of the extremely cold days with rather large day-to-day variation in winter as pointed out by Kato et al. (2017) for around Germany was seen also to the north and to the east of Germany. According to a case study for the 2000/2001 winter, such large daily mean temperature fluctuation was closely related to the intraseasonal variation of the Icelandic low with about one month period, i.e., while the temperature around Germany was relatively higher at the eastward shift phase of the Icelandic low due to the strong warm air advection by the SW-ly wind, the temperature was extremely low there when the Icelandic low was weakened and retreated westward.
Keywords Comparative climatology Climate around Europe Synoptic climatology on daily temperature variation in winter around Germany seasonal cycle and “seasonal feeling”
Publication Title Okayama University Earth Science Report
Published Date 2018-12-27
Volume volume25
Issue issue1
Start Page 7
End Page 17
ISSN 1340-7414
language 日本語
Copyright Holders © 2018 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
JaLCDOI 10.18926/ESR/56691
Title Alternative Non-calcareous beachrock found in Akagurisaki, Ohi Town, Fukui Prefecture
FullText URL esr_025_001_005.pdf
Author Suzuki, Shigeyuki| Azuma, Yoichi| Deyama, Yasuyo| Yukawa, Hirokazu| Usui, Mayumi|
Abstract Beachrock which was formed about 0.5 meter higher than high tide is found in Akagurisaki, Ohi Town, Fukui Prefecture. The outcrops always get wet by spring water. The sediments are composed of well sorted rounded gravels and sands but calcareous shell is not found at all. Intergranular space is occupied by white amorphous cement. Magnesium and silicon rich composition of the cement is obtained by EPMA analysis. There is a conjecture that the magnesium rich cement was precipitated in spite of solution of calcareous shell under saturated state by spring water, because calcium has a higher tendency to ionize than magnesium.
Keywords Beachrock Akagurisaki non-calcareous cement ionization tendency
Publication Title Okayama University Earth Science Report
Published Date 2018-12-27
Volume volume25
Issue issue1
Start Page 1
End Page 5
ISSN 1340-7414
language 日本語
Copyright Holders © 2018 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
FullText URL esr_025_titlepage.pdf
Publication Title Okayama University Earth Science Report
Published Date 2018-12-27
Volume volume25
Issue issue1
ISSN 1340-7414
language 英語
Copyright Holders © 2018 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
FullText URL esr_025_cover.pdf
Publication Title Okayama University Earth Science Report
Published Date 2018-12-27
Volume volume25
Issue issue1
ISSN 1340-7414
language 英語
Copyright Holders © 2018 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
FullText URL esr_024_1_contents.pdf
Author Department of Earth Sciences, Faculty of Science, Okayama University |
Publication Title Okayama University Earth Science Report
Published Date 2017-12-27
Volume volume24
Issue issue1
ISSN 1340-7414
language 日本語
Copyright Holders © 2017 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
FullText URL esr_024_1_colophon.pdf
Author Department of Earth Sciences, Faculty of Science, Okayama University |
Publication Title Okayama University Earth Science Report
Published Date 2017-12-27
Volume volume24
Issue issue1
ISSN 1340-7414
language 日本語
Copyright Holders © 2017 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
JaLCDOI 10.18926/ESR/56190
Title Alternative Interdisciplinary class for high school students on the climate environment around Japan and "seasonal feeling" expressed in the school songs with attention to the asymmetric seasonal march from autumn to the next spring
FullText URL esr_024_1_005_018.pdf
Author Kato, Kuranoshin| Kato, Haruko| Miyake, Shoji| Mori, Taizo|
Abstract This study is a part of the activity to develop an interdisciplinary lesson plan for high school students on the climate environment around Japan and the "seasonal feeling". This time, we focused our attention to the asymmetric seasonal march from autumn to the next spring as proposed by Kato et al. (2013). Comparison of the climate between early winter and early spring was made in the class not only on that around the Japan but also on the relation to the larger-scale systems such as the Siberian air mass, including the brief data analysis. The students also compared the detailed "seasonal feeling" between the two seasons expressed in the school songs and the Japanese classic poems called "Wa-Ka". This paper reports the contents and results of this joint activity at the two high schools.
Keywords Interdisciplinary activity on climate and cultural understanding education Climate environment around Japan Seasonal cycle and "seasonal feeling" Asymmetric seasonal march from autumn to the next spring ESD
Publication Title Okayama University Earth Science Report
Published Date 2017-12-27
Volume volume24
Issue issue1
Start Page 5
End Page 18
ISSN 1340-7414
language 日本語
Copyright Holders © 2017 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher