搜索结果: 1-15 共查到“大气科学 isoprene”相关记录45条 . 查询时间(0.195 秒)
North American isoprene influence on intercontinental ozone pollution
North American isoprene intercontinental ozone pollution
2011/2/25
Changing land-use and climate may alter emissions of biogenic isoprene, a key ozone (O3) precursor. Isoprene is also a precursor to peroxy acetyl nitrate (PAN) and thus affects partitioning among oxid...
Evidence for a significant proportion of Secondary Organic Aerosol from isoprene above a maritime tropical forest
a significant proportion Secondary Organic Aerosol isoprene a maritime tropical forest
2011/2/25
Isoprene is the most abundant non-methane biogenic volatile organic compound (BVOC), but the processes governing secondary organic aerosol (SOA) formation from isoprene oxidation are only beginning to...
Modeling secondary organic aerosol formation from isoprene oxidation under dry and humid conditions
secondary organic aerosol isoprene oxidation dry and humid conditions
2011/2/24
A new model for the formation of secondary organic aerosol (SOA) from isoprene was developed. This model uses surrogate molecular species (hydroxy-hydroperoxides, tetrols, methylglyceric acid, organic...
Improved global modelling of HOx recycling in isoprene oxidation: evaluation against the GABRIEL and INTEX-A aircraft campaign measurements
HOx recycling isoprene oxidation the GABRIEL and INTEX-A aircraft campaign measurements
2010/10/21
Stimulated by recent important developments regarding the oxidation chemistry of isoprene, this study evaluates and quantifies the impacts of different mechanism updates on the boundary layer concentr...
HOx observations over West Africa during AMMA: impact of isoprene and NOx
HOx observations West Africa AMMA isoprene NOx
2010/10/11
Aircraft OH and HO2 measurements made over West Africa during the AMMA field campaign in summer 2006 have been investigated using a box model constrained to observations of long-lived species and phys...
Isoprene emissions modelling for West Africa: MEGAN model evaluation and sensitivity analysis
Isoprene emissions modelling West Africa MEGAN model
2010/9/21
Isoprene emissions are the largest source of reactive carbon to the atmosphere, with the tropics being a major source region. These natural emissions are expected to change with changing climate and h...
Impacts of mechanistic changes on HOx formation and recycling in the oxidation of isoprene
mechanistic changes HOx formation the oxidation of isoprene
2010/9/14
Recently reported model-measurement discrepancies for the concentrations of the HOx radical species (OH and HO2) in locations characterized by high emission rates of isoprene have indicated possible d...
Effects of climate-induced changes in isoprene emissions after the eruption of Mount Pinatubo
climate-induced changes isoprene emissions the eruption of Mount Pinatubo
2010/8/16
In the 1990s the rates of increase of greenhouse gas concentrations, most notably of methane, were observed to change, for reasons that have yet to be fully determined. This period included the erupti...
Isoprene nitrates: preparation, separation, identification, yields, and atmospheric chemistry
Isoprene nitrates atmospheric chemistry
2010/8/16
Isoprene is an important atmospheric volatile organic compound involved in ozone production and NOx (NO+NO2) sequestration and transport. Isoprene reaction with OH in the presence of NO can form eithe...
Cloud droplet activation of mixed organic-sulfate particles produced by the photooxidation of isoprene
Cloud droplet mixed organic-sulfate particles the photooxidation of isoprene
2010/8/12
The cloud condensation nuclei (CCN) properties of ammonium sulfate particles mixed with organic material condensed during the hydroxyl-radical-initiated photooxidation of isoprene (C5H8) were investig...
A numerical evaluation of global oceanic emissions of α-pinene and isoprene
global oceanic emissions α-pinene isoprene
2010/2/21
A numerical evaluation of global oceanic emissions of α-pinene and isoprene based on both "bottom-up" and "top-down" methods is presented. We infer that the global "bottom-up" oceanic emissions of α-p...
Measurements of OH and HO2 yields from the gas phase ozonolysis of isoprene
OH and HO2 yields gas phase ozonolysis isoprene
2010/2/21
The reactions of ozone with alkenes are an important source of hydroxyl (OH) radicals; however, quantification of their importance is hindered by uncertainties in the absolute OH yield. Hydroxyl radic...
Sensitivity of isoprene emissions estimated using MEGAN to the time resolution of input climate data
isoprene emissions MEGAN input climate data
2010/2/21
We evaluate the effect of varying the temporal resolution of the input climate data on isoprene emission estimates generated by the community emissions model MEGAN (Model of Emissions of Gases and Aer...
Rapid formation of isoprene photo-oxidation products observed in Amazonia
Rapid formation isoprene photo-oxidation products Amazonia
2009/11/9
Isoprene represents the single most important reactive hydrocarbon for atmospheric chemistry in the tropical atmosphere. It plays a central role in global and regional atmospheric chemistry and possib...
Formation of secondary organic aerosol from isoprene oxidation over Europe
secondary organic aerosol isoprene oxidation Europe
2009/9/23
The role of isoprene as a precursor to secondary organic aerosol (SOA) over Europe is studied with the two-way nested global chemistry transport model TM5. The inclusion of the formation of SOA from i...