青木 伸輔

領 域 名  食料生産学

教員氏名   青 木 伸 輔

研究分野 農業気象学 

研究キーワード:環境,温室効果ガス,土壌,海洋,ガスハイドレート

最近の研究課題

1.農業環境の水分移動

 近年の気候変動によって水資源の適切な利用が求められており,農業利用の灌漑水も例外ではない.このために栽培環境において作物が要求する水量(蒸散量)と地表面からの蒸発量を正確に把握する必要がある。観測データから環境条件などの変化による作物の要求水分量を経時的に把握する.

2.土壌中の水分・物質移動

 目視できない土壌中の水分や物質の移動を明らかにするために多様なセンサーが開発されてきた.これらのセンサーを組み合わせ,これまで明らかにできなかった土壌中や根圏で起きる現象やメカニズムを植物の生理現象を含めて明らかにしていきたい.

3.海底から噴出するガス(メタン)の気泡のゆくえ

 表層型メタンハイドレート賦存域のような堆積物深部から多量のガスが供給される海域の海底からは,気泡の噴出が観測されることがある.堆積物中を流体として移動するガスによる海底堆積物への影響や海水中へ噴出したガスの海水,大気への影響に関する研究を進めている.

代表的な研究業績  

青木ら(2018)日本海東縁部の表層型ガスハイドレート賦存域における海底表層堆積物の土質特性, 堆積 学研究, 76(2), 61-75.

馬込ら(2020)長野県夜間瀬地区リンゴ園における熱収支法による蒸発散量推定, 明治大学農学部研究報告, 69(2), 57-63.

青木ら(2020)日本海東縁と北海道周辺の洋上大気メタン濃度と海底ガスプルームの関係, 石油技術協会誌, 85(6), 111-118.

Snyder et al. (2022) Ocean Dynamics and Methane Plume Activity in Tatar Strait, Far Eastern Federal District, Russia as Revealed by Seawater Chemistry, Hydroacoustics, and Noble Gas Isotopes, Front. Earth Sci., 10, 825679.

Kojima et al. (2023) A four-parameter-based thermos-TDR approach to estimate water and NAPL contents of soil liquid, Geoderma, 429, 116263.

Research Area: Food Production

Research Specialization:  Agricultural Meteorology

Name: AOKI, Shinsuke

Key ward:environment,greenhouse gases, soil, ocean,gas hydrate

Recent Research

1.Evapotranspiration in the agricultural field

   The climate change has led to the need for appropriate use of water resources, and irrigation water for agriculture is no exception. It is necessary to accurately determine the amount of water demanded by crops in the cultivation environment (transpiration) and the amount of evaporation from the soil. We are focusing on the water demand of crops due to change of the environmental conditions based on observation.

2.Water and mass transfer in soil

   Various sensors have been developed to reveal the dynamics of water and substances in the saturated/unsaturated soil. we would like to clarify phenomena and mechanisms including crop ecophysiology in the soil and rhizosphere with sensors.

3.Lifetime of gas (CH4) bubbles from seafloor

 In shallow gas hydrate areas, bubbles seeped from the seafloor may be observed. This is due to the large amount of gas supplied by the deeper sediments. We are studying the effects of gas moving as fluid through the sediments on sediments and the lifetime of the gas released into water column (and/or the atmosphere).

Publications

Aoki et al. (2018) Soil properties of subsurface sediments collected from shallow gas hydrate province in the eastern margin of the Japan Sea, J. of the Sed. Soc. Japan, 76(2), 61-75.

Magome et al. (2020) Estimation of Energy-Balance-Based Evapotranspiration in an Apple Orchard, Yomase District of Nagano Prefecture, Bulletin of School of Agriculture, Meiji University, 69(2), 57-63.

Aoki et al. (2020) Relationship between atmospheric CH4 concentration above sea surface and gas plumes from seafloor along the eastern margin of Japan sea and around Hokkaido, J. Japanese Assoc. Petrol. Technol, 85(6), 111-118.

Snyder et al. (2022) Ocean Dynamics and Methane Plume Activity in Tatar Strait, Far Eastern Federal District, Russia as Revealed by Seawater Chemistry, Hydroacoustics, and Noble Gas Isotopes, Front. Earth Sci., 10, 825679.

Kojima et al. (2023) A four-parameter-based thermos-TDR approach to estimate water and NAPL contents of soil liquid, Geoderma, 429, 116263.

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