Faculty Profiles - TSUNOGAI Urumu

Papers - TSUNOGAI Urumu

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Geological features for the formation of gas-geochemical fields, including helium and hydrogen, in the water and sediments at the Vietnamese part of the South-China Sea Reviewed International coauthorship International journal Open Access

Syrbu N.S., Cuong D.H., Iakimov T.S., Kholmogorov A.O., Telegin Y.A., Tsunogai U.

Georesursy Vol. 23 ( 3 ) page： 132 - 142 2021

Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：Georesursy

The paper presents the results of a complex joint Russian-Vietnamese geological, geophysical and oceanographic expedition in the South-China Sea (R/V “Akademik M.A. Lavrentyev”, cruise 88, 2019), as well as related joint Russian- Vietnamese marine and land researches in the area of north and south Vietnam under a series of local FEB RAS - VAST grants. The organizers of the marine expedition are the V. I. Ilyichev Pacific Oceanological Institute of the Far Eastern Branch of the Russian Academy of Sciences (POI FEB RAS) and the Institute of Marine Geology and Geophysics of the Vietnam Academy of Science and Technology (IMGG VAST). In comparison with the Sea of Japan and the Sea of Okhotsk, it can be noted that the active bottom degassing on the on the Vietnamese shelf and slope have is a local, although the intensity of gas-geochemical anomalies is comparable to similar zones in the Far Eastern Seas. For the first time, anomalous methane fields (up to 5000 nl/l) were found in the water column of the South- China Sea, which are comparable to anomalies on the oil and gas shelf and the gas-hydrate-bearing slope of Sakhalin Island. Metamorphosed sedimentary and volcanic rocks were discovered for the first time in the southern part of Catba Island (Gulf of Tonkin), which indicates the introduction of an endogenous body into the sedimentary strata and its further transformation. In connection with the discovery in 2020 of the large Ken Bau gas field at the southern end of the sedimentary basin of the Red River, the forecast of POI scientists about the presence of significant hydrocarbon reserves in this area was confirmed. The work was carried out within the framework of the joint Vietnam-Russia Laboratory for Marine Sciences and Technology (V. I. Ilyichev Pacific Oceanological Institute of the Far Eastern Branch of the Russian Academy of Sciences and the Institute of Marine Geology and Geophysics Vietnam Academy of Science and Technology). The expedition of the R/V “Akademik M.A. Lavrentyev” (cruise 88) is part of a series of expeditions in accordance with the UN Decade dedicated to the Ocean Science for Sustainable Development.

DOI： 10.18599/grs.2021.1.16

Open Access

Web of Science

Scopus

Variation of volcanic gas composition at a poorly accessible volcano: Sakurajima, Japan Reviewed International journal

H. Shinohara, R. Kazahaya, T. Ohminato, T. Kaneko, U. Tsunogai, M. Morita

Journal of Volcanology and Geothermal Research Vol. 407 page： 107098 - 107098 2020.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Elsevier {BV}

Volcanic gas compositions are estimated based on volcanic plume measurement with Multi-GAS at a frequently erupting Sakurajima volcano by application of airborne methods and automatic monitoring station on the flank during 2013–2019. The airborne measurements of CO2 and H2O concentrations often suffer from large fluctuation of background likely due to entrainment of the atmosphere derived from different altitude. By removing the background effect, a representative volcanic CO2/SO2 mole ratio is estimated as 0.4 ± 0.1 and we did not observe clear temporal variation. The volcanic H2O/SO2 ratios are estimated as 30–70 with a large uncertainty because of the strong atmospheric perturbation. The SO2/H2S ratios show quite a large variation ranging from 1 to 800. The large SO2/H2S ratios larger than 30 are observed during ash eruption and are suggested as a result of oxidation by atmosphere on hot ashes. The small ratios less than 10 are observed when frequency of explosions is low. Variation of the SO2/H2S ratios of the small values can be caused by variation of degassing pressure, however, the small variation of the CO2/SO2 ratio suggests a limited range of the pressure variation.

DOI： 10.1016/j.jvolgeores.2020.107098

Web of Science

Scopus

Dual stable isotope characterization of excess methane in oxic waters of a mesotrophic lake Reviewed International journal Open Access

Tsunogai Urumu, Miyoshi Yuko, Matsushita Toshiyuki, Komatsu Daisuke D., Ito Masanori, Sukigara Chiho, Nakagawa Fumiko, Maruo Masahiro

LIMNOLOGY AND OCEANOGRAPHY Vol. 65 ( 12 ) page： 2937 - 2952 2020.7

Gas-geochemical studies of gas fields and increased metal concentrations in the East Siberian Sea Reviewed International coauthorship International journal Open Access

Shakirov R. B., A. V. Sorochinskaja, N. S. Syrbu, Urumu Tsunogai, Tran Hoang Yen

VIETNAM JOURNAL OF EARTH SCIENCES Vol. 42 ( 4 ) page： 395 - 410 2020

Language：English Publishing type：Research paper (scientific journal) Publisher：Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)

Paper presents the results of complex gas-geochemical studies of bottom sediments of the East Siberian Sea along the meridional profile from Cape Billings to the Mendeleev Ridge. Abnormal concentrations of methane (up to 2.4% vol.) and hydrogen (up to 600 ppm) are controlled by neotectonic faults and are typical for the areas of gas hydrate formation. The carbon isotope composition indicates the predominance of the thermogenic component. When studying the chemical composition of sediments, the data helped to identify the permeability zones of neotectonic faults that have favorable conditions for the concentration of a number of elements: Mn, Cu, Ag. Such zones are characterized by the gas anomalies in sediments (methane, hydrogen, etc.). The accumulation of anomalous metal contents is facilitated by specific geological conditions that occur in zones of gas anomalies within tectonically active structures, where fine-grained sediments enriched with organic matter are present. The gas-geochemical fields formed in this pattern can be applied as indicators in forecasting of hydrocarbon accumulations, for mapping permeable fault zones, and for the environmental impact assessing of hydrocarbon anomalies. This approach could be especially effective in the basins with low seismic activity such as seas of East Siberian shelf and some of the marginal seas of Pacific Ocean, for instance, South China Sea (Bien Dong).

DOI： 10.15625/0866-7187/42/4/15492

Open Access

Web of Science

Scopus

Development of a drone-borne volcanic plume sampler Open Access

Tsunogai Urumu, Shingubara Ryo, Ito Masanori, Nakagawa Fumiko, Yoshikawa Shin, Utsugi Mitsuru, Yokoo Akihiko

Abstracts of Annual Meeting of the Geochemical Society of Japan Vol. 67 page： 132 2020

Influence of warm-core eddy on dissolved methane distributions in the southwestern Canada basin during late summer/early fall 2015 Reviewed International journal Open Access

Oanh Thi Ngoc Bui, Kameyama Sohiko, Kawaguchi Yusuke, Nishino Shigeto, Tsunogai Urumu, Yoshikawa-Inoue Hisayuki

POLAR SCIENCE Vol. 22 2019.12

Stable hydrogen and oxygen isotopic compositions of water vapor in volcanic plumes sampled in glass bottles using cavity ring-down spectroscopy Reviewed International journal Open Access

Takahashi Koji U., Tsunogai Urumu, Nakagawa Fumiko, Sukigara Chiho

JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH Vol. 384 page： 232-240 2019.10

Time Variation in the Chemical and Isotopic Composition of Fumarolic Gasses at Kusatsu-Shirane Volcano, Japan Reviewed Open Access

Ohba Takeshi, Yaguchi Muga, Nishino Kana, Numanami Nozomi, Tsunogai Urumu, Ito Masanori, Shingubara Ryo

FRONTIERS IN EARTH SCIENCE Vol. 7 2019.9

Time variations in the chemical and isotopic composition of fumarolic gases at Hakone volcano, Honshu Island, Japan, over the earthquake swarm and eruption in 2015, interpreted by magma sealing model Reviewed International journal Open Access

Ohba Takeshi, Yaguchi Muga, Nishino Kana, Numanami Nozomi, Daita Yasushi, Sukigara Chiho, Ito Masanori, Tsunogai Urumu

EARTH PLANETS AND SPACE Vol. 71 ( 1 ) 2019.4

Export flux of unprocessed atmospheric nitrate from temperate forested catchments: a possible new index for nitrogen saturation Reviewed International journal Open Access

Nakagawa Fumiko, Tsunogai Urumu, Obata Yusuke, Ando Kenta, Yamashita Naoyuki, Saito Tatsuyoshi, Uchiyama Shigeki, Morohashi Masayuki, Sase Hiroyuki

BIOGEOSCIENCES Vol. 15 ( 22 ) page： 7025 - 7042 2018.11

Variation of geochemical environments associated with whale-fall biomass mineralization processes in the sediment during the mobile scavenger, enrichment opportunist, and sulfophilic stages

Onishi Yuji, Shimamura Sho, Yamanaka Toshiro, Nakayama Rei, Ozaki Ken-Ichi, Miyazaki Masayuki, Tsunogai Urumu, Fujiwara Yoshihiro

MARINE BIOLOGY Vol. 165 ( 9 ) 2018.9

Estimates of methane emissions from the Southern Ocean from quasi-continuous underway measurements of the partial pressure of methane in surface seawater during the 2012/13 austral summer Open Access

Oanh Thi Ngoc Bui, Kameyama Sohiko, Yoshikawa-Inoue Hisayuki, Ishii Masao, Sasano Daisuke, Uchida Hiroshi, Tsunogai Urumu

TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY Vol. 70 2018.8

Deep-biosphere methane production stimulated by geofluids in the Nankai accretionary complex Open Access

Ijiri Akira, Inagaki Fumio, Kubo Yusuke, Adhikari Rishi R., Hattori Shohei, Hoshino Tatsuhiko, Imachi Hiroyuki, Kawagucci Shinsuke, Morono Yuki, Ohtomo Yoko, Ono Shuhei, Sakai Sanae, Takai Ken, Toki Tomohiro, Wang David T., Yoshinaga Marcos Y., Arnold Gail L., Ashi Juichiro, Case David H., Feseker Tomas, Hinrichs Kai-Uwe, Ikegawa Yojiro, Ikehara Minoru, Kallmeyer Jens, Kumagai Hidenori, Lever Mark A., Morita Sumito, Nakamura Ko-ichi, Nakamura Yuki, Nishizawa Manabu, Orphan Victoria J., Roy Hans, Schmidt Frauke, Tani Atsushi, Tanikawa Wataru, Terada Takeshi, Tomaru Hitoshi, Tsuji Takeshi, Tsunogai Urumu, Yamaguchi Yasuhiko T., Yoshida Naohiro

SCIENCE ADVANCES Vol. 4 ( 6 ) 2018.6

Clay Mineral Suites in Submarine Mud Volcanoes in the Kumano Forearc Basin, Nankai Trough: Constraints on the Origin of Mud Volcano Sediments Open Access

Ijiri Akira, Iijima Koichi, Tsunogai Urumu, Ashi Juichiro, Inagaki Fumio

GEOSCIENCES Vol. 8 ( 6 ) 2018.6

Triple oxygen isotopes indicate urbanization affects sources of nitrate in wet and dry atmospheric deposition Open Access

Nelson David M., Tsunogai Urumu, Ding Dong, Ohyama Takuya, Komatsu Daisuke D., Nakagawa Fumiko, Noguchi Izumi, Yamaguchi Takashi

ATMOSPHERIC CHEMISTRY AND PHYSICS Vol. 18 ( 9 ) page： 6381-6392 2018.5

Quantifying nitrate dynamics in a mesotrophic lake using triple oxygen isotopes as tracers Open Access

Tsunogai Urumu, Miyauchi Takanori, Ohyama Takuya, Komatsu Daisuke D., Ito Masanori, Nakagawa Fumiko

LIMNOLOGY AND OCEANOGRAPHY Vol. 63 page： S458-S476 2018.3

Ecological and genomic profiling of anaerobic methane-oxidizing archaea in a deep granitic environment Open Access

Ino Kohei, Hernsdorf Alex W., Konno Uta, Kouduka Mariko, Yanagawa Katsunori, Kato Shingo, Sunamura Michinari, Hirota Akinari, Togo Yoko S., Ito Kazumasa, Fukuda Akari, Iwatsuki Teruki, Mizuno Takashi, Komatsu Daisuke D., Tsunogai Urumu, Ishimura Toyoho, Amano Yuki, Thomas Brian C., Banfield Jillian F., Suzuki Yohey

ISME JOURNAL Vol. 12 ( 1 ) page： 31-47 2018.1

Flux and distribution of methane (CH4) in the Gunsan Basin of the southeastern Yellow Sea, off the Western Korea

Lee Jun-Ho, Woo Han Jun, Son Seung-Kyu, Kim Moonkoo, Lee Dong-Hun, Tsunogai Urumu, Jeong Kap-Sik

JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING Vol. 53 ( 5 ) page： 457-466 2018

Recent advances in earth and environmental sciences using natural stable isotopes as tracers Open Access

Tsunogai Urumu

Chikyukagaku Vol. 52 ( 3 ) page： 107-129 2018

Language：English Publishing type：Research paper (scientific journal)

By using the hydrogen isotope exchange equilibrium between molecular hydrogen (H2) and water vapor, a new method called HIReTS (Hydrogen Isotopes Remote Temperature Sensing) was proposed for remote sensing of fumarole outlet temperatures. In this method, the hydrogen isotopic composition (δD) of fumarolic H2 is obtained remotely from observation in a volcanic plume, and the outlet temperature is then derived from the obtained δD of fumarolic H2. The HIReTS method can be used to obtain the fumarolic temperature remotely in active volcanoes when the actual fumaroles are inaccessible. Recent advances in using the 17O-excess (Δ17O) of nitrate were summarized as well. Within the possible sources of nitrate in the natural environment, only atmospheric nitrate that is produced from atmospheric NO through photochemical reactions can be characterized by the anomalous enrichment in 17O, reflecting the transfer of an oxygen atom from ozone. In addition, Δ17O is stable during partial metabolism—such as denitrification and assimilation, so by using these characteristics of Δ17O, the author and co-workers were able to trace the fate of atmospheric nitrate deposited onto surface ecosystems. This also allowed the author and co-workers to propose a new method to quantify nitrate dynamics—production rate through nitrification and metabolic rate through assimilation and denitrification—in aquatic environments, using the Δ17O of nitrate. The Δ17O method is considered to offer an alternative to the traditional artificial tracer techniques for the determination of nitrate dynamics, including temporal variations.

DOI： 10.14934/chikyukagaku.52.107

Open Access

CiNii Research

湖沼における硝化速度定量化の新手法について

角皆潤, 中川書子

月刊下水道 Vol. 41 page： 66 - 71 2018

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Papers - TSUNOGAI Urumu