نتایج جستجو برای: ch4 storage
تعداد نتایج: 191067 فیلتر نتایج به سال:
افزایش غلظت و انتشار گازهای گلخانه ای در اتمسفر به فعالیت های انسانی نسبت داده شده است. از جمله این فعالیت ها انتخاب نامناسب روش های خاک ورزی، کاشت و آبیاری است. با توجه به بحران آب در چند سال اخیر، مدیریت خاک ورزی و آبیاری باید به سمت کاهش بهم خوردن خاک و کاهش نفوذ عمقی آب در سیستم های تولید محصولات کشاورزی باشد. جهت بررسی تاثیر خاک ورزی و روش های آبیاری بر میزان تصاعد گازهای گلخانه ای در کشت ...
Most research on CO2 flooding is focusing storage than CH4 recovery and mostly simulation-based. To our knowledge, there have been limited reported experimental injections capable of unlocking a high amount the residual methane due to their miscibility effect. The empirical study has highlighted impact N2 as booster gas during Enhanced Gas Recovery (EGR) process by flooding. acts buster re-pres...
Natural gas hydrates (NGH) are potential energy resource and distributed in unconsolidated marine sediments. CH4–CO2 swapping combined with depressurization is a promising method for simultaneously enhancing CH4 recovery CO2 storage NGH. This was previously studied on CH4/CO2 mixed consolidated sediments but no such studies available In this study, we investigated dissociation characteristics o...
[1] Airborne measurements of methane (CH4) and carbon dioxide (CO2) were taken over the rice growing region of California’s Sacramento Valley in the late spring of 2010 and 2011. From these and ancillary measurements, we show that CH4 mixing ratios were higher in the planetary boundary layer above the Sacramento Valley during the rice growing season than they were before it, which we attribute ...
Methane (CH4) emissions from ruminants should be accounted for the natural grazed rangeland ecosystems when devising greenhouse gas budget inventory, in particular, their contribution to global warming. In this study, CH4 emission from sheep respiration at different grazing intensities (light grazing, 0.75 sheep/ha, LG; moderate grazing, 1.50 sheep/ha, MG; and heavy grazing, 2.25 sheep/ha, HG) ...
Globally, the methane (CH4) efflux from the ocean to the atmosphere is small, despite high rates of CH4 production in continental shelf and slope environments. This low efflux results from the biological removal of CH4 through anaerobic oxidation with sulfate in marine sediments. In some settings, however, pore water CH4 is found throughout the sulfate-bearing zone, indicating an apparently ine...
[1] Spaceborne measurements by the Atmospheric Infrared Sounder (AIRS) on the EOS/ Aqua satellite provide a global view of the methane (CH4) distribution in the mid‐upper troposphere (MUT‐CH4). The focus of this study is to examine the spatiotemporal variation of MUT‐CH4 in the high Northern Hemisphere (HNH) using AIRS retrievals, aircraft measurements, and simulations from a forward chemistry‐...
Arctic terrestrial ecosystems are major global sources of methane (CH4); hence, it is important to understand the seasonal and climatic controls on CH4 emissions from these systems. Here, we report year-round CH4 emissions from Alaskan Arctic tundra eddy flux sites and regional fluxes derived from aircraft data. We find that emissions during the cold season (September to May) account for ≥ 50% ...
[1] Soil consumption of atmospheric methane plays an important secondary role in regulating the atmospheric CH4 budget, next to the dominant loss mechanism involving reaction with the hydroxyl radical (OH). Here we used a process-based biogeochemistry model to quantify soil consumption during the 20th and 21st centuries. We estimated that global soils consumed 32–36 Tg CH4 yr 1 during the 1990s...
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