搜索结果: 1-15 共查到“地球科学总论 methane”相关记录18条 . 查询时间(0.076 秒)
Uncertainties in estimating regional methane emissions from rice paddies due to data scarcity in the modeling approach
estimating regional methane emissions rice paddies
2014/12/18
Rice paddies are a major anthropogenic source
of the atmospheric methane. However, because of the high
spatial heterogeneity, making accurate estimations of the
methane emission from rice paddies i...
Present state of global wetland extent and wetland methane modelling: methodology of a model inter-comparison project (WETCHIMP)
global wetland extent wetland methane modelling model inter-comparison project
2014/12/12
The Wetland and Wetland CH4 Intercomparison of Models Project (WETCHIMP) was created to evaluate our present ability to simulate large-scale wetland characteristics and corresponding methane (CH4) emi...
Exploring Isotopic Signatures of Lake El'gygytgyn Sediments for Evidence of Anoxia and Methane Cycling over the Past 50,000 Years
Exploring Isotopic Signatures Lake El'gygytgyn Sediments Evidence of Anoxia and Methane Cycling over the Past 50,000 Years
2014/10/21
Compound specific isotope analysis of lake sediments is a powerful tool in deciphering evidence of changing climatic and paleoenvironmental conditions through time. Isotopic analysis of Lake El’gygytg...
Sensitivity analysis of a wetland methane emission model based on temperate and arctic wetland sites
a wetland methane emission model temperate and arctic wetland sites
2010/1/21
Modelling of wetland CH4 fluxes using wetland soil emission models is used to determine the size of this natural source of CH4 emission on local to global scale. Most process models of CH4 formation a...
The consumption of atmospheric methane by soil in a simulated future climate
consumption atmospheric methane soil simulated future climate
2010/1/21
A recently developed model for the consumption of atmospheric methane by soil (Curry, 2007) is used to investigate the global magnitude and distribution of methane uptake in a simulated future climate...
Methanotrophy potential versus methane supply by pore water diffusion in peatlands
Methanotrophy potential versus methane pore water diffusion peatlands
2010/1/20
Low affinity methanotrophic bacteria consume a significant quantity of methane in wetland soils in the vicinity of plant roots and at the oxic-anoxic interface. Estimates of the efficiency of methanot...
Regulation of anaerobic methane oxidation in sediments of the Black Sea
Regulation anaerobic methane oxidation sediments Black Sea
2010/1/20
Anaerobic oxidation of methane (AOM) and sulfate reduction (SRR) were investigated in sediments of the western Black Sea, where upward methane transport is controlled by diffusion. To understand the r...
Soil,plant,and transport influences on methane in a subalpine forest under high ultraviolet irradiance
Soil plant transport influences methane subalpine forest high ultraviolet irradiance
2010/1/20
Recent studies have demonstrated direct methane emission from plant foliage under aerobic conditions, particularly under high ultraviolet (UV) irradiance. We examined the potential importance of this ...
An experimental study on short-term changes in the anaerobic oxidation of methane in response to varying methane and sulfate fluxes
short-term changes anaerobic oxidation methane methane and sulfate fluxes
2010/1/20
A major role in regulation of global methane fluxes has been attributed to the process of anaerobic oxidation of methane (AOM), which is performed by consortia of methanotrophic archaea and sulfate re...
Quantifying methane emissions from rice fields in the Taihu Lake region,China by coupling a detailed soil database with biogeochemical model
methane emissions rice fields Taihu Lake detailed soil database biogeochemical model
2010/1/20
As China has approximately 22% of the world's rice paddies, the regional quantification of CH4 emissions from these paddies is important in determining their contribution to the global greenhouse gas ...
Physical injury stimulates aerobic methane emissions from terrestrial plants
Physical injury aerobic methane emissions terrestrial plants
2010/1/19
Physical injury is common in terrestrial plants as a result of grazing, harvesting, trampling, and extreme weather events. Previous studies demonstrated enhanced emission of non-microbial CH4 under ae...
Methane dynamics in different boreal lake types
Methane dynamics different boreal lake types
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 ...
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
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...
No detectable aerobic methane efflux from plant material,nor from adsorption/desorption processes
aerobic methane efflux plant material adsorption desorption processes
2010/1/18
In early 2006, Keppler et al. (Nature, 439:187–191) reported a novel finding that plant leaves, and even simple organic materials, can release methane under aerobic conditions. We investigated here wh...
Biogeochemical processes and microbial diversity of the Gullfaks and Tommeliten methane seeps (Northern North Sea)
Biogeochemical processes microbial diversity Gullfaks Tommeliten methane seeps
2010/1/18
Fluid flow related seafloor structures and gas seeps were detected in the North Sea in the 1970s and 1980s by acoustic sub-bottom profiling and oil rig surveys. A variety of features like pockmarks, g...