scholarly journals Screening of phyto-sources from foothill of Himalayan mountain for livestock methane reduction

2019 ◽  
Vol 1 (3) ◽  
Author(s):  
P. K. Malik ◽  
Y. Uyeno ◽  
A. P. Kolte ◽  
R. Kumar ◽  
S. Trivedi ◽  
...  
Keyword(s):  
Himalayan Mountain ◽  
Methane Reduction

Bacterial biodiversity from Roopkund Glacier, Himalayan mountain ranges, India

Extremophiles ◽  
2010 ◽  
Vol 14 (4) ◽  
pp. 377-395 ◽  
Author(s):  
Suman Pradhan ◽  
T. N. R. Srinivas ◽  
Pavan Kumar Pindi ◽  
K. Hara Kishore ◽  
Z. Begum ◽  
...  
Keyword(s):  
Mountain Ranges ◽  
Himalayan Mountain ◽  
Bacterial Biodiversity

Methane suppression by coconut oil and associated effects on nutrient and energy balance in sheep

1999 ◽  
Vol 79 (1) ◽  
pp. 65-72 ◽  
Author(s):  
A. Machmüller ◽  
M. Kreuzer
Keyword(s):  
Cell Wall ◽  
Energy Balance ◽  
Nitrogen Balance ◽  
Latin Square ◽  
Coconut Oil ◽  
Suppressive Effect ◽  
Major Influence ◽  
Gaseous Exchange ◽  
Gross Energy ◽  
Methane Reduction

Three different diets with increasing proportions of coconut oil (0, 3.5 and 7%) were fed to six sheep in an incomplete Latin square experiment with four replicates per diet. The diets were composed of hay and concentrates either without or with coconut oil. Concentrate comprised 28.8 and 54.6% of the diet DM in the treatments containing 3.5 and 7% coconut oil, respectively. Wethers on all treatments were fed at 1.2 × maintenance. Gaseous exchange was measured in respiratory chambers. Protozoa counts were reduced (P < 0.05) by 88 and 97% when diets contained 3.5 and 7% coconut oil, respectively, whereas bacteria counts increased (P < 0.05). Supplementation of coconut oil at proportions of 3.5 and 7% suppressed (P < 0.001) methane production by 28 and 73%, respectively, as related to the unsupplemented diet. This proportionately reduced (P < 0.001) the amount of gross energy lost through methane from 7.5 to 5.7 and 2.5%, in diets containing 0, 3.5 and 7% coconut oil, respectively. Assuming a linear suppressive effect of coconut oil, about half of the additional methane reduction with the 7% coconut oil diet as compared with the 3.5% diet was attributed to the substitution of concentrate for hay. Digestibility of cell wall constituents was numerically decreased by coconut oil. Apart from this and its effect on methane emissions coconut oil had no major influence on digestion or on energy and nitrogen balance. Key words: Coconut oil, methane, energy balance, sheep, ruminants

Solar fuels production via two-step thermochemical cycle based on Fe3O4/Fe with methane reduction

Solar Energy ◽  
2019 ◽  
Vol 177 ◽  
pp. 772-781 ◽  
Author(s):  
Lei Wang ◽  
Tianzeng Ma ◽  
Zheshao Chang ◽  
Hao Li ◽  
Mingkai Fu ◽  
...  
Keyword(s):  
Solar Fuels ◽  
Thermochemical Cycle ◽  
Methane Reduction

Medieval bronzes of the Himalayan Mountain Kingdoms

JOM ◽  
1991 ◽  
Vol 43 (12) ◽  
pp. 6-9 ◽  
Author(s):  
Chandra L. Reedy
Keyword(s):  
Himalayan Mountain

Methane Emissions Reduction Solutions: Product Development and Standardization

2020 ◽  
Author(s):  
Sean Garceau ◽  
Amar Jawalkar ◽  
Ryan McKennon ◽  
Christopher Moffatt ◽  
Anthony Pocengal ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Ghg Emissions ◽  
Methane Emissions ◽  
Blow Down ◽  
Gas Industry ◽  
Process Gas ◽  
Natural Gas Industry ◽  
Methane Reduction ◽  
Carbon Dioxide Co2 ◽  
The Impact

Abstract The Oil & Gas industry and environmental agencies around the world are working to find solutions to reduce greenhouse gas (GHG) emissions. A comprehensive study by the US EPA found that emissions from compressor stations, blow down and purge, accounted for 97.7 Bscf or just over 31% of the total methane emissions attributed to the Natural Gas industry. [1] With methane (CH4) having 25 times the impact on global warming compared to carbon dioxide (CO2), and global legislation like the Regulations Respecting Reduction in the Release of Methane and Certain Volatile Organic Compounds Upstream Oil and Gas Sector (or also called Canadian Methane Rule) and regional methane reduction regulations, developing solutions to further mitigate methane emissions from process gas vents and centrifugal gas compressor seals becomes necessary as the industry moves towards near-zero targets. This paper addresses the design requirements and selection of a process gas vent recapture system and primary dry seal vent recapture system. In addition, this paper will review the design consideration during the design phase to the data collected during site operation.

scholarly journals Multiple remote-sensing assessment of the catastrophic collapse in Langtang Valley induced by the 2015 Gorkha earthquake

2017 ◽  
Vol 17 (11) ◽  
pp. 1907-1921 ◽  
Author(s):  
Hiroto Nagai ◽  
Manabu Watanabe ◽  
Naoya Tomii ◽  
Takeo Tadono ◽  
Shinichi Suzuki
Keyword(s):  
Monsoon Season ◽  
Deposition Process ◽  
Visual Interpretation ◽  
Gorkha Earthquake ◽  
Water Stream ◽  
2015 Gorkha Earthquake ◽  
Himalayan Mountain ◽  
Hazard Process ◽  
Langtang Valley

Abstract. The main shock of the 2015 Gorkha Earthquake in Nepal induced numerous avalanches, rockfalls, and landslides in Himalayan mountain regions. A major village in the Langtang Valley was destroyed and numerous people were victims of a catastrophic avalanche event, which consisted of snow, ice, rock, and blast wind. Understanding the hazard process mainly depends on limited witness accounts, interviews, and an in situ survey after a monsoon season. To record the immediate situation and to understand the deposition process, we performed an assessment by means of satellite-based observations carried out no later than 2 weeks after the event. The avalanche-induced sediment deposition was delineated with the calculation of decreasing coherence and visual interpretation of amplitude images acquired from the Phased Array-type L-band Synthetic Aperture Radar-2 (PALSAR-2). These outline areas are highly consistent with that delineated from a high-resolution optical image of WorldView-3 (WV-3). The delineated sediment areas were estimated as 0.63 km2 (PALSAR-2 coherence calculation), 0.73 km2 (PALSAR-2 visual interpretation), and 0.88 km2 (WV-3). In the WV-3 image, surface features were classified into 10 groups. Our analysis suggests that the avalanche event contained a sequence of (1) a fast splashing body with an air blast, (2) a huge, flowing muddy mass, (3) less mass flowing from another source, (4) a smaller amount of splashing and flowing mass, and (5) splashing mass without flowing on the east and west sides. By means of satellite-derived pre- and post-event digital surface models, differences in the surface altitudes of the collapse events estimated the total volume of the sediments as 5.51 ± 0.09  ×  106 m3, the largest mass of which are distributed along the river floor and a tributary water stream. These findings contribute to detailed numerical simulation of the avalanche sequences and source identification; furthermore, altitude measurements after ice and snow melting would reveal a contained volume of melting ice and snow.

Soil macrofauna diversity and population dynamics in Indian Himalayan agroecosystems

Soil Research ◽  
2020 ◽  
Vol 58 (7) ◽  
pp. 636
Author(s):  
Madhuri Pant ◽  
G. C. S. Negi ◽  
Pramod Kumar
Keyword(s):  
Soil Fertility ◽  
Rainy Season ◽  
Soil Depth ◽  
Soil Macrofauna ◽  
Crop Fields ◽  
Β Diversity ◽  
Top Soil ◽  
Himalayan Mountain ◽  
Irrigated Wheat ◽  
Taxonomic Groups

Soil macrofauna diversity in Himalayan mountain agroecosystems has received negligible attention despite people’s dependence on soil fertility that determines crop yield for their sustenance. This study was carried out with the objective to determine differences in soil macrofauna taxonomic groups and abundance with soil depth (0–30 cm) in irrigated and non-irrigated wheat and rice crops of two dominant Himalayan mountain agroecosystems. At both the sites, a total of 11 macrofauna groups and 23 families were recorded. Macrofauna population across both crop seasons for non-irrigated fields was significantly greater (P &lt; 0.05) than in irrigated fields. Macrofauna population significantly differed (P &lt; 0.001) with soil depth and significantly declined with increasing soil depth (P &lt; 0.001). The top soil (0–10 cm depth) contributed over 80% of the total macrofauna population. Macrofauna diversity in non-irrigated fields (H′ = 2.10) was greater than in irrigated fields (H′ = 1.86), but β diversity was greater in irrigated fields (1.67 vs 1.76). The two agroecosystem types significantly differed (P &lt; 0.05) with soil depth and crop season. On the basis of presence or absence, the macrofauna groups were categorised as (i) present in soil year-round but exhibiting high density during warm and wet rainy season and (ii) present in soil only during the warm and wet rainy season. The non-irrigated fields had greater abundance of Coleoptera, Dermaptera, Hemiptera and Isoptera than the irrigated fields. This study highlights that the Himalayan mountain crop fields host a rather diverse and abundant macro-invertebrate community that should be efficiently used to promote soil fertility.

scholarly journals The influence of water percolation through crevasses on the thermal regime of a Himalayan mountain glacier

2020 ◽  
Vol 14 (4) ◽  
pp. 1273-1288 ◽  
Author(s):  
Adrien Gilbert ◽  
Anna Sinisalo ◽  
Tika R. Gurung ◽  
Koji Fujita ◽  
Sudan B. Maharjan ◽  
...  
Keyword(s):  
Thermal Regime ◽  
Simple Method ◽  
Mountain Glacier ◽  
Basal Ice ◽  
Water Percolation ◽  
Influence Of Water ◽  
Mechanical Models ◽  
Himalayan Mountain ◽  
Ground Penetrating ◽  
Transient Thermal

Abstract. In cold and arid climates, small glaciers with cold accumulation zones are often thought to be entirely cold based. However, scattering in ground-penetrating radar (GPR) measurements on the Rikha Samba Glacier in the Nepal Himalayas suggests a large amount of temperate ice that seems to be influenced by the presence of crevassed areas. We used a coupled thermo-mechanical model forced by a firn model accounting for firn heating to interpret the observed thermal regime. Using a simple energy conservation approach, we show that the addition of water percolation and refreezing in crevassed areas explains these observations. Model experiments show that both steady and transient thermal regimes are significantly affected by latent heat release in crevassed areas. This makes half of the glacier base temperate, resulting in an ice dynamic mainly controlled by basal friction instead of ice deformation. The timescale of thermal regime change, in response to atmospheric warming, is also greatly diminished, with a potential switch from cold to temperate basal ice in 50–60 years in the upper part of the glacier instead of the 100–150 years that it would take without the effect of the crevasses. This study highlights the crucial role of water percolation through the crevasses on the thermal regime of glaciers and validates a simple method to account for it in glacier thermo-mechanical models.

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