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Hemispheric average Cl atom concentration from 13C/12C ratios in atmospheric methane
Hemispheric average Cl atom concentration 13C/12C ratios atmospheric methane
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2009/3/10
Methane is a significant atmospheric trace gas in the context of greenhouse warming and climate change. The dominant sink of atmospheric methane is the hydroxyl radical (OH). Recently, a mechanism for...
Random heterogeneous model with bimodal velocity distribution for Methane Hydrate exploration
methane hydrate bimodal distribution random heterogeneous
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2009/3/5
We have developed a random heterogeneous velocity model with bimodal distribution in methane hydrate-bearing zones. The P-wave well-log data have a von Karman type autocorrelation function and non-Gau...
Carbon monoxide, methane and carbon dioxide columns retrieved from SCIAMACHY by WFM-DOAS: year 2003 initial data set
Carbon monoxide carbon dioxide columns SCIAMACHY WFM-DOAS
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2009/2/19
The near-infrared nadir spectra measured by SCIAMACHY on-board ENVISAT contain information on the vertical columns of important atmospheric trace gases such as carbon monoxide (CO), methane (CH4), and...
Validation of ENVISAT/SCIAMACHY columnar methane by solar FTIR spectrometry at the Ground-Truthing Station Zugspitze
ENVISAT/SCIAMACHY columnar methane solar FTIR spectrometry Ground-Truthing Station Zugspitze
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2009/2/17
Methane total-vertical column retrievals from ground-based solar FTIR measurements at the Permanent Ground-Truthing Station Zugspitze (47.42° N, 10.98° E, 2964m a.s.l.), Germany are used to validate ...
Methane dynamics in different boreal lake types
Methane dynamics different boreal lake types
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2010/1/19
This study explores the variability in concentrations of dissolved CH4 and annual flux estimates in the pelagic zone in a statistically defined sample of 207 lakes in Finland. The lakes were situated ...
The impact of air pollutant and methane emission controls on tropospheric ozone and radiative forcing: CTM calculations for the period 1990-2030
air pollutant methane emission tropospheric ozone CTM
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2009/2/12
To explore the relationship between tropospheric ozone and radiative forcing with changing emissions, we compiled two sets of global scenarios for the emissions of the ozone precursors methane (CH4), ...
Atmospheric methane and carbon dioxide from SCIAMACHY satellite data: initial comparison with chemistry and transport models
Atmospheric methane carbon dioxide SCIAMACHY satellite data chemistry and transport models
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2009/2/8
The remote sensing of the atmospheric greenhouse gases methane (CH4) and carbon dioxide (CO2) in the troposphere from instrumentation aboard satellites is a new area of research. In this manuscript, r...
Methane emission from tropical savanna Trachypogon sp. grasses
Methane emission tropical savanna Trachypogon sp. grasses
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2009/1/20
Methane flux measurements from the soil-grass system were made during the wet season in unperturbed plots and plots where standing dry and green Trachypogon sp. grasses were clipped to just above the ...
Effects of methane outgassing on the Black Sea atmosphere
Effects of methane outgassing Black Sea atmosphere
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2009/1/19
Methane in air and seawater was measured in the Eastern Black Sea during the 10–18 December 1999 BIGBLACK project cruise. The measurements allowed for the calculation of supersaturation ratios and me...
Tropospheric OH and Cl levels deduced from non-methane hydrocarbon measurements in a marine site
Tropospheric OH Cl levels non-methane hydrocarbon marine site
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2008/12/18
In situ continuous hourly measurements of C2–C8 non-methane hydrocarbons (NMHCS) have been performed from March to October 2006 at two coastal locations (natural and rural) on the island of Crete, in ...
The atmospheric cycling of radiomethane and the“fossil fraction”of the methane source
radiomethane fossil fraction methane
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2008/12/8
The cycling of 14CH4 ("radiomethane") through the atmosphere has been strongly perturbed in the industrial era by the release of 14C-free methane from geologic reservoirs ("fossil methane" emissions),...
Centennial evolution of the atmospheric methane budget: what do the carbon isotopes tell us?
atmospheric methane budget carbon isotopes
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2008/12/8
Little is known about how the methane source inventory and sinks have evolved over recent centuries. New and detailed records of methane mixing ratio and isotopic composition (12CH4, 13CH4 and 14CH4) ...
Stable isotopes provide revised global limits of aerobic methane emissions from plants
Stable isotopes aerobic methane emissions plants
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2008/11/27
Recently Keppler et al. (2006) discovered a surprising new source of methane – terrestrial plants under aerobic conditions, with an estimated global production of 62–236 Tg yr−1 by an unknown me...
Four-dimensional variational data assimilation for inverse modelling of atmospheric methane emissions: method and comparison with synthesis inversion
Four-dimensional variational data atmospheric methane synthesis inversion
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2008/11/25
A four-dimensional variational (4D-Var) data assimilation system for inverse modelling of atmospheric methane emissions is presented. The system is based on the TM5 atmospheric transport model. It can...
Constraints on mechanisms and rates of anaerobic oxidation of methane by microbial consortia:process-based modeling of ANME-2 archaea and sulfate reducing bacteria interactions
mechanisms anaerobic oxidation methane microbial consortia ANME-2 archaea
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2010/1/18
Anaerobic oxidation of methane (AOM) is the main process responsible for the removal of methane generated in Earth's marine subsurface environments. However, the biochemical mechanism of AOM remains e...