scholarly journals Methane emissions from a freshwater marsh in response to experimentally simulated global warming and nitrogen enrichment

2010 ◽  
Vol 115 (G1) ◽  
Author(s):  
Sabine Flury ◽  
Daniel F. McGinnis ◽  
Mark O. Gessner
Keyword(s):  
Global Warming ◽  
Methane Emissions ◽  
Freshwater Marsh ◽  
Nitrogen Enrichment

Application of a mechanistic model of methanogenesis in the lactating dairy cow. The fate of hydrogen during fermentation and strategies to mitigate methane emissions

2001 ◽  
Vol 2001 ◽  
pp. 122-122
Author(s):  
J A N Mills ◽  
J. Dijkstra ◽  
A. Bannink ◽  
E. Kebreab ◽  
S.B. Cammell ◽  
...  
Keyword(s):  
Global Warming ◽  
Dairy Cattle ◽  
Causative Agent ◽  
Dairy Cow ◽  
Dietary Intervention ◽  
Mechanistic Model ◽  
Methane Emissions ◽  
Significant Loss ◽  
Lactating Dairy Cattle

Dietary intervention to reduce methane emissions from lactating dairy cattle is both environmentally and nutritionally desirable due to the importance of methane as a causative agent in global warming and as a significant loss of feed energy. This investigation involved the development of a dynamic mechanistic model of whole rumen function (Dijkstra et al. 1992), with the objective to simulate whole-animal methane emissions for a range of dietary inputs.

scholarly journals Response of methane emissions to litter input manipulation in a temperate freshwater marsh, Northeast China

2020 ◽  
Vol 115 ◽  
pp. 106377
Author(s):  
Chao Gong ◽  
Changchun Song ◽  
Li Sun ◽  
Dan Zhang ◽  
Jing Zhang ◽  
...  
Keyword(s):  
Northeast China ◽  
Methane Emissions ◽  
Freshwater Marsh ◽  
Litter Input

Dynamics of methane emissions from a freshwater marsh of northeast China

2006 ◽  
Vol 371 (1-3) ◽  
pp. 286-292 ◽  
Author(s):  
Wenyan Yang ◽  
Changchun Song ◽  
Jinbo Zhang
Keyword(s):  
Northeast China ◽  
Methane Emissions ◽  
Freshwater Marsh

Yield-scaled global warming potential of annual nitrous oxide and methane emissions from continuously flooded rice in response to nitrogen input

2013 ◽  
Vol 177 ◽  
pp. 10-20 ◽  
Author(s):  
Cameron M. Pittelkow ◽  
Maria A. Adviento-Borbe ◽  
James E. Hill ◽  
Johan Six ◽  
Chris van Kessel ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Global Warming ◽  
Global Warming Potential ◽  
Methane Emissions ◽  
Nitrogen Input ◽  
Flooded Rice

scholarly journals Methane transport from the active layer to lakes in the Arctic using Toolik Lake, Alaska, as a case study

2015 ◽  
Vol 112 (12) ◽  
pp. 3636-3640 ◽  
Author(s):  
Adina Paytan ◽  
Alanna L. Lecher ◽  
Natasha Dimova ◽  
Katy J. Sparrow ◽  
Fenix Garcia-Tigreros Kodovska ◽  
...  
Keyword(s):  
Global Warming ◽  
Active Layer ◽  
Lake Water ◽  
Large Fraction ◽  
Methane Flux ◽  
Methane Emissions ◽  
Arctic Lakes ◽  
The Arctic ◽  
Emission Rates ◽  
Toolik Lake

Methane emissions in the Arctic are important, and may be contributing to global warming. While methane emission rates from Arctic lakes are well documented, methods are needed to quantify the relative contribution of active layer groundwater to the overall lake methane budget. Here we report measurements of natural tracers of soil/groundwater, radon, and radium, along with methane concentration in Toolik Lake, Alaska, to evaluate the role active layer water plays as an exogenous source for lake methane. Average concentrations of methane, radium, and radon were all elevated in the active layer compared with lake water (1.6 × 104 nM, 61.6 dpm⋅m−3, and 4.5 × 105 dpm⋅m−3 compared with 1.3 × 102 nM, 5.7 dpm⋅m−3, and 4.4 × 103 dpm⋅m−3, respectively). Methane transport from the active layer to Toolik Lake based on the geochemical tracer radon (up to 2.9 g⋅m−2⋅y−1) can account for a large fraction of methane emissions from this lake. Strong but spatially and temporally variable correlations between radon activity and methane concentrations (r2 > 0.69) in lake water suggest that the parameters that control methane discharge from the active layer also vary. Warming in the Arctic may expand the active layer and increase the discharge, thereby increasing the methane flux to lakes and from lakes to the atmosphere, exacerbating global warming. More work is needed to quantify and elucidate the processes that control methane fluxes from the active layer to predict how this flux might change in the future and to evaluate the regional and global contribution of active layer water associated methane inputs.

scholarly journals Asian Miracles and Climate Change

2017 ◽  
Vol 2 (4) ◽  
pp. 61
Author(s):  
Jan-Erik Lane ◽  
Florent Dieterlen
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Energy Consumption ◽  
Methane Emissions

One may introduce a concept of Hawking irreversibility as the point where temperature has risen so much that the global warming consequences threaten the survival of mankind. The recent news out of China that its CO2s are increasing again makes this term highly policy relevant. Moreover, the methane emissions have started to augment, which also calls up Hawking irreversibility. The drive behind these dire developments is the endless zest for affluence and wealth, fueled by ever larger energy consumption. Asian miracle economies should take this warming seriously and srart the implementatuion os COP21 Treaty.

scholarly journals An observation-constrained assessment of the climate sensitivity and future trajectories of wetland methane emissions

2020 ◽  
Vol 6 (15) ◽  
pp. eaay4444 ◽  
Author(s):  
Ernest N. Koffi ◽  
Peter Bergamaschi ◽  
Romain Alkama ◽  
Alessandro Cescatti
Keyword(s):  
Global Warming ◽  
Land Surface ◽  
Large Scale ◽  
Methane Emissions ◽  
Climate Feedbacks ◽  
Global Estimate ◽  
Temperature And Precipitation ◽  
Surface Models ◽  
Natural Wetlands

Wetlands are a major source of methane (CH4) and contribute between 30 and 40% to the total CH4 emissions. Wetland CH4 emissions depend on temperature, water table depth, and both the quantity and quality of organic matter. Global warming will affect these three drivers of methanogenesis, raising questions about the feedbacks between natural methane production and climate change. Until present the large-scale response of wetland CH4 emissions to climate has been investigated with land-surface models that have produced contrasting results. Here, we produce a novel global estimate of wetland methane emissions based on atmospheric inverse modeling of CH4 fluxes and observed temperature and precipitation. Our data-driven model suggests that by 2100, current emissions may increase by 50% to 80%, which is within the range of 50% and 150% reported in previous studies. This finding highlights the importance of limiting global warming below 2°C to avoid substantial climate feedbacks driven by methane emissions from natural wetlands.

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