Origin of 13C-enriched methane in the crater lake Towada, Japan

Rieko Nishimura, Urumu Tsunogai, Junichiro Ishibashi, Hiroshi Wakita, Yukihiro Nojiri

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Concentration and stable carbon isotopic composition (δ13C) of CH4 are determined in a water column of an 327 m deep oxic oligotrophic crater lake, Lake Towada in Japan. The results of CTD measurements show relatively high temperature and high conductivity in the lower part of the column, possibly derived from hot springs at the crater wall approximately 150 m deep. The vertical profile of CH4 concentration shows two sharp maxima of 68 and 69 nmol/kg at depths of 20 and 150 m, respectively. The δ13C value of CH4 at 20 m is -55‰PDB, suggesting microbial production in and around the lake. In contrast, the δ13C value of CH4 at 150 m is +11‰PDB, which suggests some secondary isotopic alternation processes peculiar to hot spring-derived CH4 in the oxic water column, such as rapid aerobic microbial oxidation.

Original languageEnglish
Pages (from-to)277-283
Number of pages7
JournalGEOCHEMICAL JOURNAL
Volume33
Issue number4
DOIs
Publication statusPublished - Jan 1 1999

Fingerprint

crater lake
Methane
thermal spring
lakes
craters
Hot springs
Lakes
Japan
methane
water column
lake
charge transfer devices
vertical profile
crater
isotopic composition
conductivity
Water
alternations
oxidation
water

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

Cite this

Origin of 13C-enriched methane in the crater lake Towada, Japan. / Nishimura, Rieko; Tsunogai, Urumu; Ishibashi, Junichiro; Wakita, Hiroshi; Nojiri, Yukihiro.

In: GEOCHEMICAL JOURNAL, Vol. 33, No. 4, 01.01.1999, p. 277-283.

Research output: Contribution to journalArticle

Nishimura, R, Tsunogai, U, Ishibashi, J, Wakita, H & Nojiri, Y 1999, 'Origin of 13C-enriched methane in the crater lake Towada, Japan', GEOCHEMICAL JOURNAL, vol. 33, no. 4, pp. 277-283. https://doi.org/10.2343/geochemj.33.277
Nishimura, Rieko ; Tsunogai, Urumu ; Ishibashi, Junichiro ; Wakita, Hiroshi ; Nojiri, Yukihiro. / Origin of 13C-enriched methane in the crater lake Towada, Japan. In: GEOCHEMICAL JOURNAL. 1999 ; Vol. 33, No. 4. pp. 277-283.
@article{eae53a30ca6349f585c0cc1546d8dfae,
title = "Origin of 13C-enriched methane in the crater lake Towada, Japan",
abstract = "Concentration and stable carbon isotopic composition (δ13C) of CH4 are determined in a water column of an 327 m deep oxic oligotrophic crater lake, Lake Towada in Japan. The results of CTD measurements show relatively high temperature and high conductivity in the lower part of the column, possibly derived from hot springs at the crater wall approximately 150 m deep. The vertical profile of CH4 concentration shows two sharp maxima of 68 and 69 nmol/kg at depths of 20 and 150 m, respectively. The δ13C value of CH4 at 20 m is -55‰PDB, suggesting microbial production in and around the lake. In contrast, the δ13C value of CH4 at 150 m is +11‰PDB, which suggests some secondary isotopic alternation processes peculiar to hot spring-derived CH4 in the oxic water column, such as rapid aerobic microbial oxidation.",
author = "Rieko Nishimura and Urumu Tsunogai and Junichiro Ishibashi and Hiroshi Wakita and Yukihiro Nojiri",
year = "1999",
month = "1",
day = "1",
doi = "10.2343/geochemj.33.277",
language = "English",
volume = "33",
pages = "277--283",
journal = "Geochemical Journal",
issn = "0016-7002",
publisher = "The Physiological Society of Japan",
number = "4",

}

TY - JOUR

T1 - Origin of 13C-enriched methane in the crater lake Towada, Japan

AU - Nishimura, Rieko

AU - Tsunogai, Urumu

AU - Ishibashi, Junichiro

AU - Wakita, Hiroshi

AU - Nojiri, Yukihiro

PY - 1999/1/1

Y1 - 1999/1/1

N2 - Concentration and stable carbon isotopic composition (δ13C) of CH4 are determined in a water column of an 327 m deep oxic oligotrophic crater lake, Lake Towada in Japan. The results of CTD measurements show relatively high temperature and high conductivity in the lower part of the column, possibly derived from hot springs at the crater wall approximately 150 m deep. The vertical profile of CH4 concentration shows two sharp maxima of 68 and 69 nmol/kg at depths of 20 and 150 m, respectively. The δ13C value of CH4 at 20 m is -55‰PDB, suggesting microbial production in and around the lake. In contrast, the δ13C value of CH4 at 150 m is +11‰PDB, which suggests some secondary isotopic alternation processes peculiar to hot spring-derived CH4 in the oxic water column, such as rapid aerobic microbial oxidation.

AB - Concentration and stable carbon isotopic composition (δ13C) of CH4 are determined in a water column of an 327 m deep oxic oligotrophic crater lake, Lake Towada in Japan. The results of CTD measurements show relatively high temperature and high conductivity in the lower part of the column, possibly derived from hot springs at the crater wall approximately 150 m deep. The vertical profile of CH4 concentration shows two sharp maxima of 68 and 69 nmol/kg at depths of 20 and 150 m, respectively. The δ13C value of CH4 at 20 m is -55‰PDB, suggesting microbial production in and around the lake. In contrast, the δ13C value of CH4 at 150 m is +11‰PDB, which suggests some secondary isotopic alternation processes peculiar to hot spring-derived CH4 in the oxic water column, such as rapid aerobic microbial oxidation.

UR - http://www.scopus.com/inward/record.url?scp=0032707128&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032707128&partnerID=8YFLogxK

U2 - 10.2343/geochemj.33.277

DO - 10.2343/geochemj.33.277

M3 - Article

AN - SCOPUS:0032707128

VL - 33

SP - 277

EP - 283

JO - Geochemical Journal

JF - Geochemical Journal

SN - 0016-7002

IS - 4

ER -