Diurnal variability of atmospheric methane, nonmethane hydrocarbons, and carbon monoxide at Mauna Loa

1992 ◽  
Vol 97 (D10) ◽  
pp. 10395 ◽  
Author(s):  
J. P. Greenberg ◽  
P. R. Zimmerman ◽  
W. F. Pollock ◽  
R. A. Lueb ◽  
L. E. Heidt
Keyword(s):  
Carbon Monoxide ◽  
Nonmethane Hydrocarbons ◽  
Atmospheric Methane ◽  
Diurnal Variability ◽  
Mauna Loa

scholarly journals Seasonal and diurnal measurements of carbon monoxide and nonmethane hydrocarbons at Mt. Wilson, California: Indirect evidence of atomic Cl in the Los Angeles basin

2010 ◽  
Vol 44 (19) ◽  
pp. 2271-2279 ◽  
Author(s):  
Katrine A. Gorham ◽  
Nicola J. Blake ◽  
Richard A. VanCuren ◽  
Henry E. Fuelberg ◽  
Simone Meinardi ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Los Angeles ◽  
Indirect Evidence ◽  
Nonmethane Hydrocarbons ◽  
Los Angeles Basin

Atmospheric methane at Mauna Loa and Barrow observatories: Presentation and analysis of in situ measurements

1995 ◽  
Vol 100 (D11) ◽  
pp. 23103 ◽  
Author(s):  
Edward J. Dlugokencky ◽  
L. Paul Steele ◽  
Patricia M. Lang ◽  
Kenneth A. Masarie
Keyword(s):  
In Situ Measurements ◽  
Atmospheric Methane ◽  
Mauna Loa

scholarly journals The formaldehyde budget as seen by a global-scale multi-constraint and multi-species inversion system

2012 ◽  
Vol 12 (3) ◽  
pp. 6909-6955
Author(s):  
A. Fortems-Cheiney ◽  
F. Chevallier ◽  
I. Pison ◽  
P. Bousquet ◽  
M. Saunois ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Organic Compounds ◽  
Global Scale ◽  
Surface Fluxes ◽  
Atmospheric Methane ◽  
Mixing Ratios ◽  
Volatile Organic ◽  
Satellite Retrievals ◽  
Surface Measurements ◽  
First Time

Abstract. For the first time, carbon monoxide (CO) and formaldehyde (HCHO) satellite retrievals have been used together with methane (CH4) and methyl choloroform (CH3CCl3 or MCF) surface measurements in a complex inversion system. The CO and HCHO are, respectively from MOPITT and OMI instruments. The multi-species and multi-satellite dataset inversion is done for the 2005–2008 period. The robustness of our results is evaluated by comparing our posterior-modeled concentrations with several sets of independent measurements of atmospheric mixing ratios. The inversion results lead to significant changes from the prior to the posterior, in terms of magnitude and seasonality of the CO and CH4 surface fluxes and of the 3-D HCHO production by non-methane volatile organic compounds (NMVOCs). The latter is significantly decreased, indicating an overestimation of the biogenic NMVOCs emissions, such as isoprene, in the GEIA inventory. CO and CH4 surface emissions are increased by the inversion, from 1037 to 1409 Tg CO and from 489 to 528 TgCH4 on average for the 2005–2008 period. CH4 emissions present significant interannual variability and a joint CO–CH4 fluxes analysis reveals that tropical biomass burning probably played a role in the recent increase of atmospheric methane.

scholarly journals Accelerating methane growth rate from 2010 to 2017: leading contributions from the tropics and East Asia

2020 ◽  
Author(s):  
Yi Yin ◽  
Frederic Chevallier ◽  
Philippe Ciais ◽  
Philippe Bousquet ◽  
Marielle Saunois ◽  
...  
Keyword(s):  
Growth Rate ◽  
Carbon Monoxide ◽  
Satellite Observations ◽  
Anthropogenic Emissions ◽  
Atmospheric Methane ◽  
Sources And Sinks ◽  
Ch4 Emissions ◽  
Significant Acceleration ◽  
Oxidation Chain ◽  
The Tropics

Abstract. After stagnating in the early 2000s, the atmospheric methane growth rate has been positive since 2007 with a significant acceleration starting in 2014. While causes for previous growth rate variations are still not well determined, this recent increase can be studied with dense surface and satellite observations. Here, we use an ensemble of six multi-tracer atmospheric inversions that have the capacity to assimilate the major tracers in the methane oxidation chain – namely methane, formaldehyde, and carbon monoxide – to simultaneously optimize both the methane sources and sinks at each model grid. We show that the recent surge of the atmospheric growth rate between 2010–2013 and 2014–2017 is most likely explained by an increase of global CH4 emissions by 17.5 ± 1.5 Tg yr−1 (mean ± 1σ), while variations in CH4 sinks remained small. The inferred emission increase is consistently supported by both surface and satellite observations, with leading contributions from the tropics wetlands (~ 35 %) and anthropogenic emissions in China (~ 20 %). Such a high consecutive atmospheric growth rate has not been observed since the 1980s and corresponds to unprecedented global total CH4 emissions.

Variations in atmospheric methane at Mauna Loa Observatory related to long-range transport

1992 ◽  
Vol 97 (D5) ◽  
pp. 6003 ◽  
Author(s):  
Joyce M. Harris ◽  
Pieter P. Tans ◽  
Edward J. Dlugokencky ◽  
Kenneth A. Masarie ◽  
Patricia M. Lang ◽  
...  
Keyword(s):  
Long Range ◽  
Long Range Transport ◽  
Atmospheric Methane ◽  
Mauna Loa ◽  
Range Transport

scholarly journals Simultaneous Oxidation of Atmospheric Methane, Carbon Monoxide and Hydrogen for Bacterial Growth

2021 ◽  
Vol 9 (1) ◽  
pp. 153
Author(s):  
Alexander Tøsdal Tveit ◽  
Tilman Schmider ◽  
Anne Grethe Hestnes ◽  
Matteus Lindgren ◽  
Alena Didriksen ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Low Energy ◽  
Metabolic Flexibility ◽  
Atmospheric Methane ◽  
Oxidation Of Co ◽  
Ch4 Oxidation ◽  
Methane Oxidizing Bacteria ◽  
Simultaneous Oxidation ◽  
Methane Oxidizer ◽  
Methane Carbon

The second largest sink for atmospheric methane (CH4) is atmospheric methane oxidizing-bacteria (atmMOB). How atmMOB are able to sustain life on the low CH4 concentrations in air is unknown. Here, we show that during growth, with air as its only source for energy and carbon, the recently isolated atmospheric methane-oxidizer Methylocapsa gorgona MG08 (USCα) oxidizes three atmospheric energy sources: CH4, carbon monoxide (CO), and hydrogen (H2) to support growth. The cell-specific CH4 oxidation rate of M. gorgona MG08 was estimated at ~0.7 × 10−18 mol cell−1 h−1, which, together with the oxidation of CO and H2, supplies 0.38 kJ Cmol−1 h−1 during growth in air. This is seven times lower than previously assumed necessary to support bacterial maintenance. We conclude that atmospheric methane-oxidation is supported by a metabolic flexibility that enables the simultaneous harvest of CH4, H2 and CO from air, but the key characteristic of atmospheric CH4 oxidizing bacteria might be very low energy requirements.

scholarly journals Widespread soil bacterium that oxidizes atmospheric methane

2019 ◽  
Vol 116 (17) ◽  
pp. 8515-8524 ◽  
Author(s):  
Alexander T. Tveit ◽  
Anne Grethe Hestnes ◽  
Serina L. Robinson ◽  
Arno Schintlmeister ◽  
Svetlana N. Dedysh ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Unsaturated Soils ◽  
Ambient Air ◽  
Atmospheric Methane ◽  
Microbial Oxidation ◽  
Additional Energy ◽  
Specific Affinity ◽  
Bacterium Strain ◽  
Close Relatives ◽  
Atmospheric Concentrations

The global atmospheric level of methane (CH4), the second most important greenhouse gas, is currently increasing by ∼10 million tons per year. Microbial oxidation in unsaturated soils is the only known biological process that removes CH4from the atmosphere, but so far, bacteria that can grow on atmospheric CH4have eluded all cultivation efforts. In this study, we have isolated a pure culture of a bacterium, strain MG08 that grows on air at atmospheric concentrations of CH4[1.86 parts per million volume (p.p.m.v.)]. This organism, namedMethylocapsa gorgona, is globally distributed in soils and closely related to uncultured members of the upland soil cluster α. CH4oxidation experiments and13C-single cell isotope analyses demonstrated that it oxidizes atmospheric CH4aerobically and assimilates carbon from both CH4and CO2. Its estimated specific affinity for CH4(a0s) is the highest for any cultivated methanotroph. However, growth on ambient air was also confirmed forMethylocapsa acidiphilaandMethylocapsa aurea, close relatives with a lower specific affinity for CH4, suggesting that the ability to utilize atmospheric CH4for growth is more widespread than previously believed. The closed genome ofM. gorgonaMG08 encodes a single particulate methane monooxygenase, the serine cycle for assimilation of carbon from CH4and CO2, and CO2fixation via the recently postulated reductive glycine pathway. It also fixes dinitrogen and expresses the genes for a high-affinity hydrogenase and carbon monoxide dehydrogenase, suggesting that atmospheric CH4oxidizers harvest additional energy from oxidation of the atmospheric trace gases carbon monoxide (0.2 p.p.m.v.) and hydrogen (0.5 p.p.m.v.).

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