scholarly journals Continuous Dynamics of Dissolved Methane Over 2 Years and its Carbon Isotopes (δ 13 C, Δ 14 C) in a Small Arctic Lake in the Mackenzie Delta

2021 ◽  
Vol 126 (3) ◽  
Author(s):  
Hadley A. McIntosh Marcek ◽  
Lance F. W. Lesack ◽  
Beth N. Orcutt ◽  
C. Geoff Wheat ◽  
Scott R. Dallimore ◽  
...  
Keyword(s):  
Carbon Isotopes ◽  
Mackenzie Delta ◽  
Dissolved Methane ◽  
Arctic Lake

Investigating the response of Cladocera to a major saltwater intrusion event in an Arctic lake from the outer Mackenzie Delta (NT, Canada)

2012 ◽  
Vol 48 (2) ◽  
pp. 287-296 ◽  
Author(s):  
Kayla Deasley ◽  
Jennifer B. Korosi ◽  
Joshua R. Thienpont ◽  
Steven V. Kokelj ◽  
Michael F. J. Pisaric ◽  
...  
Keyword(s):  
Saltwater Intrusion ◽  
Mackenzie Delta ◽  
Arctic Lake

Carbon isotopes in Sphagnum from Kyushu, Japan, and their relationship with local climate

2015 ◽  
Vol 49 (5) ◽  
pp. 495-502 ◽  
Author(s):  
Saki Yasuda ◽  
Seigo Ooki ◽  
Hiroshi Naraoka ◽  
Tasuku Akagi
Keyword(s):  
Carbon Isotopes ◽  
Local Climate

DISTRIBUTION OF DISSOLVED METHANE IN SURFACE COASTAL WATERS OF THE NORTHEASTERN PART OF THE BLACK SEA

2017 ◽  
Author(s):  
Elena Kovaleva ◽  
Elena Kovaleva ◽  
Alexander Izhitskiy ◽  
Alexander Izhitskiy ◽  
Alexander Egorov ◽  
...  
Keyword(s):  
Black Sea ◽  
Natural Waters ◽  
Sea Water ◽  
The Black Sea ◽  
Methane Formation ◽  
Anthropogenic Pressure ◽  
Russian Science ◽  
Southeastern Part ◽  
Dissolved Methane ◽  
Continental Runoff

Studying of methane formation and distribution in natural waters is important for understanding of biogeochemical processes of carbon cycle, searching for oil and gas sections and evaluation of CH4 emissions for investigations of greenhouse effect. The Black Sea is the largest methane water body on our planet. However, relatively low values of methane concentration (closed to equilibrium with the atmospheric air) are typical of the upper aerobic layer. At the same time, the distribution pattern of CH4 in surface waters of coastal areas is complicated by the influence of coastal biological productivity, continental runoff, bottom sources, hydrodynamic processes and anthropogenic effect. The investigation is focused on the spatial variability of dissolved methane in the surface layer of the sea in coastal regions affected by the continental runoff and anthropogenic pressure. Unique in situ data on methane concentrations were collected along the ship track on 2 sections between Sochi and Gelendzhik (2013, 2014) and 2 sections between Gelendzhik and Feodosia (2015). Overall 170 samples were obtained. Gas-chromatographic analysis of the samples revealed increase of CH4 saturation in the southeastern part of the Crimean shelf and the Kerch Strait area. Such a pattern was apparently caused by the influence of the Azov Sea water spread westward along the Crimean shore from the strait. This work was supported by the Russian Science Foundation, Project 14-50-00095 and the Russian Foundation for Basic Research, Project 16-35-00156 mol_a.

Influx of streaming methane into anoxic waters of the Black Sea basin

2019 ◽  
Vol 59 (6) ◽  
pp. 952-963
Author(s):  
Yu. G. Artemov ◽  
V. N. Egorov ◽  
S. B. Gulin
Keyword(s):  
Spatial Distribution ◽  
Black Sea ◽  
The Black Sea ◽  
Gas Bubble ◽  
Dissolved Methane ◽  
Anoxic Waters ◽  
Deep Waters ◽  
Methane Budget

Based on data on the spatial distribution and fluxes of streaming (bubbling) methane within the Black Sea, the rate of dissolved methane inflow to Black Sea deep waters was assessed. Calculations showed that gas bubble streams annually replenish the methane budget in the Black Sea by 1.2 109 m3, or 0.9 Tg, which is considerably less than determined by known biogeochemical estimates of components of methane balance in the Black Sea.

DISTRIBUTION OF DISSOLVED METHANE IN SURFACE COASTAL WATERS OF THE NORTHEASTERN PART OF THE BLACK SEA

2017 ◽  
Author(s):  
Elena Kovaleva ◽  
Elena Kovaleva ◽  
Alexander Izhitskiy ◽  
Alexander Izhitskiy ◽  
Alexander Egorov ◽  
...  
Keyword(s):  
Black Sea ◽  
Natural Waters ◽  
Sea Water ◽  
The Black Sea ◽  
Methane Formation ◽  
Anthropogenic Pressure ◽  
Russian Science ◽  
Southeastern Part ◽  
Dissolved Methane ◽  
Continental Runoff

Studying of methane formation and distribution in natural waters is important for understanding of biogeochemical processes of carbon cycle, searching for oil and gas sections and evaluation of CH4 emissions for investigations of greenhouse effect. The Black Sea is the largest methane water body on our planet. However, relatively low values of methane concentration (closed to equilibrium with the atmospheric air) are typical of the upper aerobic layer. At the same time, the distribution pattern of CH4 in surface waters of coastal areas is complicated by the influence of coastal biological productivity, continental runoff, bottom sources, hydrodynamic processes and anthropogenic effect. The investigation is focused on the spatial variability of dissolved methane in the surface layer of the sea in coastal regions affected by the continental runoff and anthropogenic pressure. Unique in situ data on methane concentrations were collected along the ship track on 2 sections between Sochi and Gelendzhik (2013, 2014) and 2 sections between Gelendzhik and Feodosia (2015). Overall 170 samples were obtained. Gas-chromatographic analysis of the samples revealed increase of CH4 saturation in the southeastern part of the Crimean shelf and the Kerch Strait area. Such a pattern was apparently caused by the influence of the Azov Sea water spread westward along the Crimean shore from the strait. This work was supported by the Russian Science Foundation, Project 14-50-00095 and the Russian Foundation for Basic Research, Project 16-35-00156 mol_a.

THERMAL ALTERATION OF PRECAMBRIAN MICROFOSSILS: APPLICATIONS TO THE STUDY OF STABLE CARBON ISOTOPES ON THE EARLY EARTH

2020 ◽  
Author(s):  
Jeffrey Osterhout ◽  
◽  
J. William Schopf ◽  
Anatoliy B. Kudryavtsev ◽  
K.D. McKeegan
Keyword(s):  
Carbon Isotopes ◽  
Stable Carbon Isotopes ◽  
Early Earth ◽  
Stable Carbon ◽  
Thermal Alteration
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