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The aim of this study was experimental assessing the emission of greenhouse gasses (CO2, CH4) from decomposed coarse woody debris in northern boreal forests of Siberia, where the main forest-forming species is larch (Larix gmelinii (Rupr.) Rupr.). Logs samples were collected in northern boreal larch forests of Central Evenkia (64°N, 100°E) at different stages of decomposition and placed in gas-tight boxes. Gas samples were measured in dynamics: at the beginning of the experiment and after 3 hour, 24 hours, after 3...

The country-specific emission factors (CS EFs) for CO2 and CH4 were derived for oil and natural gas production, processing and transport within the improvement of greenhouse gas inventory quality. To derive them, the chemical parameters of natural and associated petrol gases were also developed. The CS EFs adequately address the features of oil and gas sector of the Russian Federation. The use of CS EFs resulted in decrease of the estimated equivalent greenhouse gas fugitive emissions by 20.1 per cent for natural ...

The regularities of distribution of methane and sulfide sulfur (total sulfide ? ?H2S) in the bottom sediment deposits of therapeutic sulfide mud Lake Bolshoy (Big) Tambukan, located in the region of Caucasian Mineral Waters. Determination of methane and sulfide sulfur were produced in black and dark grey therapeutic mud, as well as in the underlying steel-grey clays and coastal sediments, represented by yellow-brown clay and loam. The formation of therapeutic sulfide mud flows through the biogeochemical environmen...

The results of Chembursky lake, Vityazevsky, Kiziltashsky and Bugazsky coastal salt lakes expeditionary research are observed, aimed to examine the allocation of methane and sulfur sulfide (total sulfide) according to the vertical cut of bottom sediments (sulfidic muds), and also the value of Eh and pH. pH and Eh values in the examined horizons of coastal salt lakes bottom sediments vary correspondingly in the limits from 7.33?8.06 and -198?-2.5 mV, in the Chembursky lake sediments ? 7.47?7.64 ? -78?+46 mV. CH4 an...

The results of methane and total hydrogen sulphide detection in bottom sediments of small rivers as well as fresh and slightly saline water bodies of the Eastern Donbass are presented. The content of CH4 in sediments of water bodies of Eastern Donbass varies between 0.04-26.8 ?g/g wet mass (w.m.), ?H2S content varies from to less 0.005 than 4.02 mg/g w.m. The maximum concentrations of methane were recorded in the bottom sediments of the Glubokaya River (Station No. 7), while the maximum of the content ?H2S is conf...

The major changes occurred in Romanian mining industry imposed by the transition to the market economy, concentration of extraction to fewer output units in deeper seams, the high gas emission rates and coal rank, other current specific trends requires new methods to produce the optimum design and operation of a safe and economic methane drainage system. Under the circumstances, the paper describes a mathematical model together with a computer-aided optimization strategy to assist the analysis of the differences b...