搜索结果: 1-15 共查到“大气科学 Hydrogen”相关记录19条 . 查询时间(0.033 秒)
“Blue” hydrogen – an energy source that involves a process for making hydrogen by using methane in natural gas – is being lauded by many as a clean, green energy to help reduce global warming. But Cor...
Generation of hydrogen peroxide from San Joaquin Valley particles in a cell-free solution
hydrogen peroxide San Joaquin Valley particles a cell-free solution
2011/2/24
Epidemiological studies have shown a correlation between exposure to ambient particulate matter (PM) and adverse health effects. One proposed mechanism of PM-mediated health effects is the generation ...
Compound-specific stable carbon and hydrogen isotopic compositions of n-alkanes in urban atmospheric aerosols from Tokyo
δD, δ13C, n-alkane urban aerosols Tokyo
2017/8/9
Stable carbon (δ13C) and hydrogen (δD) isotopic compositions of n-alkanes in total suspended particles from Tokyo were measured to decipher their source and transport in the polluted urban atmosphere....
Heterogeneous uptake of gaseous hydrogen peroxide by Gobi and Saharan dust aerosols: a potential missing sink for H2O2 in the troposphere
gaseous hydrogen peroxide Gobi and Saharan dust aerosols H2O2 the troposphere
2010/8/16
The first direct laboratory measurements of gaseous hydrogen peroxide uptake by authentic Gobi and Saharan dust aerosol particles as a function of relative humidity (RH) have been carried out in an en...
Chemistry of hydrogen oxide radicals (HOx) in the Arctic troposphere in spring
hydrogen oxide radicals the Arctic troposphere spring
2010/8/13
We use observations from the April 2008 NASA ARCTAS aircraft campaign to the North American Arctic, interpreted with a global 3-D chemical transport model (GEOS-Chem), to better understand the sources...
Molecular hydrogen (H2) emissions and their isotopic signatures (H/D) from a motor vehicle: implications on atmospheric H2
Molecular hydrogen (H2) isotopic signatures (H/D) a motor vehicle atmospheric H2
2010/8/13
Molecular hydrogen (H2), its isotopic signature (deuterium/hydrogen, δD), carbon monoxide (CO), and other compounds were studied in the exhaust of a passenger car engine fuelled with gasoline or metha...
High-frequency urban measurements of molecular hydrogen and carbon monoxide in the United Kingdom
High-frequency urban measurements molecular hydrogen carbon monoxide the United Kingdom
2010/8/13
High-frequency measurements of atmospheric molecular hydrogen (H2) and carbon monoxide (CO) were made at an urban site in the United Kingdom (UK) from mid-December, 2008 until early March, 2009. Very ...
A 15 year record of high-frequency, in situ measurements of hydrogen at Mace Head, Ireland
high-frequency hydrogen Mace Head Ireland
2010/2/21
Continuous high-frequency measurements of atmospheric molecular hydrogen have been made at Mace Head atmospheric research station on the west coast of Ireland from March 1994 to December 2008. The pre...
Hydrogen soil deposition at an urban site in Finland
Hydrogen soil deposition urban site Finland
2009/11/19
Hydrogen deposition velocities (vd) were estimated by field chamber measurements and model simulations. A closed-chamber method was used for soil deposition studies in Helsinki, Finland, at an urban p...
A consistent molecular hydrogen isotope chemistry scheme based on an independent bond approximation
molecular hydrogen isotope chemistry scheme independent bond approximation
2009/11/19
The isotopic composition of molecular hydrogen (H2) produced by photochemical oxidation of methane (CH4) and Volatile Organic Compounds (VOCs) is a key quantity in the global isotope budget of (H2). T...
Atmospheric hydrogen variations and traffic emissions at an urban site in Finland
Atmospheric hydrogen variations traffic emissions Finland
2009/10/9
Atmospheric hydrogen (H2) mixing ratios were observed over a one year period from summer 2007 to 2008 in Helsinki, Finland. Relatively stable background values of hydrogen were occasionally observed a...
Hydrogen cyanide in the upper troposphere: GEM-AQ simulation and comparison with ACE-FTS observations
Hydrogen cyanide GEM-AQ simulation ACE-FTS
2009/7/15
We investigate the spatial and temporal distribution of hydrogen cyanide (HCN) in the upper troposphere through numerical simulations and comparison with observations from a space-based instrument. To...
Contrasting atmospheric boundary layer chemistry of methylhydroperoxide（CH3OOH）and hydrogen peroxide（H2O2）above polar snow
atmospheric boundary layer chemistry CH3OOH H2O2 polar snow
2009/6/2
Atmospheric hydroperoxides (ROOH) were measured at Summit, Greenland (72.97° N, 38.77° W) in summer 2003 (SUM03) and spring 2004 (SUM04) and South Pole in December 2003 (SP03). The two dominant hydrop...
We report measurements of the deuterium content of molecular hydrogen (H2) obtained from a suite of air samples that were collected during a stratospheric balloon flight between 12 and 33 km at 40&ord...
The annual cycle of hydrogen peroxide：an indicator of chemical instability?
hydrogen peroxide chemical instability
2009/2/27
A box model has been used to study the annual cycle in hydrogen peroxide concentrations with the objective of determining whether the observed difference in summer and winter values reflects instabili...