MOTOYA Ken

写真a

Affiliation

Faculty of Education and Human Studies  Department of School Education  Combined Courses for English,Mathematics and Science Teachers  Course for Science and Mathematics Teachers
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Research Interests 【 display / non-display 】

  • 陸面過程

  • 熱･エネルギー収支

  • 水資源

  • 水文学

  • 気象学

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Graduating School 【 display / non-display 】

  • 　
    -
    1995.03

    Tohoku University   Faculty of Science   Graduated

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Graduate School 【 display / non-display 】

  • 　
    -
    2000.03

    Tohoku University  Graduate School, Division of Natural Science  Doctor's Course  Completed

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Degree 【 display / non-display 】

  • Tohoku University -  Doctor(Science)

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Campus Career 【 display / non-display 】

  • 2014.04
    -
    Now

    Akita University   Faculty of Education and Human Studies   Department of School Education   Combined Courses for English,Mathematics and Science Teachers   Course for Science and Mathematics Teachers   Associate Professor  

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Research Areas 【 display / non-display 】

  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Disaster prevention engineering

  • Natural Science / Atmospheric and hydrospheric sciences

  • Natural Science / Atmospheric and hydrospheric sciences

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Research Achievements 【 display / non-display 】

    ◆Original paper【 display / non-display 】

  • Characteristics of snow cover in the winter of 2022-23 in Akita Prefecture and its surroundings

    Ken MOTOYA

    Snow and Life in Tohoku region   ( 38 ) 58 - 61   2023.11  [Refereed]

    Research paper (journal)   Single author

    In the 2022-23 winter season in the six Tohoku prefectures, there was a tendency for low temperatures and heavy snowfall in early winter (December to January) due to the winter pressure distribution pattern and the inflow of cold air into the upper atmosphere. There was a tendency for Akita prefecture to be less snow in the coastal areas, and more snow than normal inland, and this tendency was particularly strong in the northern inland areas (heavy snow tended to occur around Ohdate and Kazuno).
    After that, from March onwards, temperatures rose and snow melted rapidly, resulting in more rapid snow melting than in the 2020-21 winter, when snow melted earlier.
    Ta. Due to this combination, the total amount of snow water in all six Tohoku prefectures peaked at a time similar to normal years (February 26), and was approximately 24.88 km3 = 24.88 Gt.

  • The characteristics of the snowfall and snow amount during the 2021-22 winters, around six prefectures in Tohoku region, Japan

    Ken MOTOYA

    Snow and Life in Tohoku ( Tohoku branch, the Society of Snow and Ice )  ( 37 ) 7 - 10   2022.11  [Refereed]

    Research paper (journal)   Single author

    In the winter of 2021-22, a record heavy snowfall occurred in Sapporo, Hokkaido, causing traffic disruptions for several days.
    In Akita Prefecture, early in winter from December onwards, the north and central inland areas of the prefecture experienced heavy snowfall.
    In southern Akita Prefecture, snow cover was below normal until the beginning of the year, and after January 2022, the snow cover gradually increased to above normal, but did not increase as much as in the winter of 2020-21.
    The changes and distribution trends of snowfall and snow cover in the winter of 2021-22 were discussed using routine meteorological data, a diagnostic snow water quantity distribution model, a snowsurvey, and meteorological data.
    In winter 2021-2022, the north of the six Tohoku prefectures experienced more snowfall than normal because of (1) cold eddies centered around the northern Sea of ​​Japan region, and (2) the northern Sea of ​​Japan region. This is thought to be due to the fact that the surface water temperature of the volcano was high and that cyclone activity was active in the northern part of the Sea of ​​Japan.

  • Trial of quasi real-time reproduction system of snow water equivalent distribution in six prefectures of Tohoku in Japan applying the diagnostic snow model

    Ken Motoya, Hiroyuki Hirashima, Hiroaki Sano, Katsuhisa Kawashima

    Snow and Life in Tohoku ( Tohoku branch, the Society of Snow and Ice )  ( 35 ) 42 - 45   2020.12  [Refereed]

    Research paper (journal)   Domestic Co-author

    In the snow depth-based database, it is difficult to estimate the snow distribution in high altitude areas such as mountains, and the snow load distribution can be estimated based on the snow depth distribution. In addition to the same problem, it is difficult for the Meteorological Agency's analysis snow depth and snowfall distribution to reflect detailed topography due to the same problem due to uneven distribution of assimilated snow depth data and the restrictions of the region model. As a means to solve this, a diagnostic snow distribution model (Motoya et al., 2001;) that can estimate the amount of snow cover in high altitude regions such as mountains by considering the altitude distribution of meteorological elements while inputting routine meteorological data. By adding functions such as automatic data acquisition to Motoya, 2008), we reproduced the daily and 1km square average snowfall distribution in the six prefectures of Tohoku in quasi real time.

  • The characteristics of the snowfall and snow amount during the 2018-19 winters, on six prefectures in Tohoku region, Japan

    Ken MOTOYA

    Snow and Life in Tohoku, Japan   34   40 - 43   2020.03  [Refereed]

    Research paper (journal)   Single author

  • Possibilities of snow leak stoppers for whole-layer-averaged snow density samplers

    Kazuyuki MATSUMOTO and Ken MOTOYA

    Summaries of JSSI&JSSE Joint Conference on Snow and Ice Research - 2019 in Yamagata     207 - 207   2019.08

    Research paper (journal)   Domestic Co-author

    DOI

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    ◆Research society, Symposium materials, etc.【 display / non-display 】

  • Improvement of fine water droplet supply in diamond dust generation experiment - Three stages (Water vapor, fine water droplets and diamond dust) method -

    Ken MOTOYA

    Summaries of JSSI & JSSE Joint Conference on Snow and Ice Research -- 2022 Sapporo -     185 - 185   2022.09

    Research paper (research society, symposium materials, etc.)   Single author

  • Snow water equivalent distribution and its changes corresponding to the new and old normal values in the 6 prefecture of Thoku region, Japan -- Comparison of 30-year averages from 1981 to 2010 and 1991 to 2020 --

    Ken MOTOYA

    Summaries of JSSI & JSSE Joint Conference on Snow and Ice Research -- 2021 Chiba - Online     156 - 156   2021.09

    Research paper (research society, symposium materials, etc.)   Single author

    DOI

  • Production of long-term datasets for snow weight distribution using numerical snowpack models

    Hiroyuki Hirashima, Ken Motoya, Katsuhisa Kawashima and Hiroaki Sano

    Summaries of JSSI & JSSE Joint Conference on Snow and Ice Research -- 2021 Chiba - Online     182 - 182   2021.09

    Research paper (research society, symposium materials, etc.)   Domestic Co-author

    DOI

  • Development and practice of a snow ice experiment kit for remote classes- Regelation and avalanche experiments -

    Motoya Ken

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research ( The Japanese Society of Snow and Ice / Japan Society for Snow Engineering )  2020 ( 0 ) 138 - 138   2020

    Research paper (research society, symposium materials, etc.)  

    DOI

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    ◆Other【 display / non-display 】

  • Sophistication of information of snow load alert by providing 1km mesh snow distribution

    Hirashima Hiroyuki, Motoya Ken, Kawashima Katsuhisa, Sano Hiroaki

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research ( The Japanese Society of Snow and Ice / Japan Society for Snow Engineering )  2020 ( 0 ) 153 - 153   2020

    DOI

  • Characteristics of the snow water equivalent distribution in the 2017-18 winter around Akita prefecture in Tohoku, Japan - Considerations by the diagnostic model of snow distribution -

    Motoya Ken, Kosugi Kenji, Adachi Satoru

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research ( The Japanese Society of Snow and Ice / Japan Society for Snow Engineering )  2018 ( 0 )   2018

    DOI

  • Field survey of snow and ice disasters in Akita and Yamagata prefectures in the winter of 2017/18

    Adachi Satoru, Kosugi Kenji, Motoya Ken, Izumi Kaoru

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research ( The Japanese Society of Snow and Ice / Japan Society for Snow Engineering )  2018 ( 0 )   2018

    DOI

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Books 【 display / non-display 】

  • Japanease Climate Encyclopedia

    2018.01 ISBN: 978-4-621-30243-9

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Grant-in-Aid for Scientific Research 【 display / non-display 】

  • Grant-in-Aid for Exploratory Research

    Project Year： 2014.04  -  Now 

  • Observations of outflow from the bottom of a snowpack on slope with a large-size snow lysimeter for the purpose of developing a prediction method for the glide avalanche release

    Grant-in-Aid for Challenging Exploratory Research

    Project Year： 2014.04  -  2017.03  Investigator(s): Kawashima Katsuhisa, NOHGUCHI Yasuaki, MATSUMOTO Takane

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Presentations 【 display / non-display 】

  • 東北６県周辺における 2021-22 年冬季の降積雪の特徴

    本谷　研

    2022年度(公社)日本雪氷学会東北支部研究発表会  (オンライン)  2022.05  -  2022.05  (公社)日本雪氷学会東北支部

  • The characteristics of the snowfall and snow amount during the 2020-21 winters, on six precectures in Tohoku region, Japan

    Ken MOTOYA

    2021(FYR) Reserach presentaion, Tohoku branch of Japanese Society of Snow and Ice   2021.05  -  2021.05 

  • Characteristics of the snow water equivalent distribution in the 2017-18 winter around Akita

    Ken MOTOYA, Kenji KOSUGI, Satoru ADACHI

    JSSI & JSSE Joint Conference on Snow and Ice Research  2018.09  -  2018.09 

  • Detections of the rain-on-snow events, from the simple snow water distribution model

    Ken MOTOYA

    JSSI & JSSE Joint Conference on Snow and Ice Research  2016.09  -  2016.10 

  • Estimation of average snowpack density, from the routinely observed snow depth data and the snow water estimation model

    Ken MOTOYA, Katsuhisa KAWASHIMA, Tsutomu IYOBE

    JSSI & JSSE Joint Conference on Snow and Ice Research  2016.09  -  2016.10 

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