搜索结果: 1-15 共查到“大气科学 Radicals”相关记录27条 . 查询时间(0.046 秒)
Hydroxyl radicals in the tropical troposphere over the Suriname rainforest: comparison of measurements with the box model MECCA
Hydroxyl radicals the tropical troposphere the Suriname rainforest the box model MECCA
2010/10/21
As a major source region of the hydroxyl radical OH, the Tropics largely control the oxidation capacity of the atmosphere on a global scale. However, emissions of hydrocarbons from the tropical rainfo...
The hydroxyl radical (OH) plays a key role in the oxidation of trace gases in the troposphere. However, observations of OH and the closely related hydroperoxy radical (HO2) have been sparse, especiall...
Influence of relative humidity and temperature on the production of pinonaldehyde and OH radicals from the ozonolysis of α-pinene
relative humidity and temperature pinonaldehyde and OH radicals α-pinene
2010/8/16
The ozonolysis of α-pinene has been investigated under dry and humid conditions in the temperature range of 243–303 K. The results provided new insight into the role of water and temperature in the de...
Vertical transport rates and concentrations of OH and Cl radicals in the Tropical Tropopause Layer from observations of CO2 and halocarbons: implications for distributions of long- and short-lived chemical species
Vertical transport rates OH and Cl radicals the Tropical Tropopause Layer long- and short-lived chemical species
2010/8/16
Rates for large-scale vertical transport of air in the Tropical Tropopause Layer (TTL) were determined using high-resolution, in situ observations of CO2 concentrations in the tropical upper troposphe...
Turbulent exchange and segregation of HOx radicals and volatile organic compounds above a deciduous forest
HOx radicals volatile organic compounds a deciduous forest
2010/8/16
The eddy covariance method was applied for the first time to estimate fluxes of OH and HO2 together with fluxes of isoprene, the sum of methyl vinyl ketone (MVK) and methacrolein (MACR) and the sum of...
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...
Hydroxyl radicals in the tropical troposphere over the Suriname rainforest: airborne measurements
Hydroxyl radicals the tropical troposphere the Suriname rainforest airborne measurements
2010/8/12
Direct measurements of OH and HO2 over a tropical rainforest were made for the first time during the GABRIEL campaign in October 2005, deploying the custom-built HORUS instrument (HydrOxyl Radical mea...
Technical Note: Characterisation of a DUALER instrument for the airborne measurement of peroxy radicals during AMMA 2006
a DUALER instrument the airborne measurement peroxy radicals AMMA 2006
2010/8/12
A DUALER (dual-channel airborne peroxy radical chemical amplifier) instrument has been developed and optimised for the airborne measurement of the total sum of peroxy radicals during the AMMA (African...
Tropospheric photooxidation of CF3CH2CHO and CF3(CH2)2CHO initiated by Cl atoms and OH radicals
Tropospheric photooxidation CF3CH2CHO Cl atoms OH radicals
2010/2/21
The absolute rate coefficients for the tropospheric reactions of chlorine (Cl) atoms and hydroxyl (OH) radicals with CF3CH2CHO and CF3(CH2)2CHO were measured as a function of temperature (263–371 K) a...
The chemistry of OH and HO2 radicals in the boundary layer over the tropical Atlantic Ocean
OH and HO2 radicals boundary layer tropical Atlantic Ocean
2010/2/21
Fluorescence Assay by Gas Expansion (FAGE) has been used to detect ambient levels of OH and HO2 radicals at the Cape Verde Atmospheric Observatory, located in the tropical Atlantic marine boundary lay...
Photoinduced oxidation of sea salt halides by aromatic ketones: a source of halogenated radicals
Photoinduced oxidation sea salt halides aromatic ketones halogenated radicals
2009/7/15
The interactions between triplet state benzophenone and halide anion species (Cl, Br and I have been studied by laser flash photolysis (at 355 nm) in aqueous solutions at room temperature. The decay o...
The heterogeneous reaction of hydroxyl radicals with sub-micron squalane particles: a model system for understanding the oxidative aging of ambient aerosols
heterogeneous reaction hydroxyl radicals sub-micron squalane particles ambient aerosols
2009/6/2
The heterogeneous reaction of OH radicals with sub-micron squalane particles, in the presence of O2, is used as a model system to explore the fundamental chemical mechanisms that control the oxidative...
Radicals in the marine boundary layer during NEAQS 2004: a model study of day-time and night-time sources and sinks
marine boundary layer NEAQS Radicals
2009/5/15
This paper describes a modelling study of several HOx and NOx species (OH, HO2, organic peroxy radicals, NO3 and N2O5) in the marine boundary layer. A model based upon the Master Chemical Mechanism (M...
Peroxy radicals in the summer free troposphere: seasonality and potential for heterogeneous loss
Peroxy radicals summer free troposphere heterogeneous loss
2009/3/31
The sum of peroxy radicals (HO2+ΣiRiO2) and supporting trace gases were measured on the Jungfraujoch (3580 m a.s.l.) during the late summer of 2005. The period was marked by extended times of heavy sn...
Kinetics of the gas-phase reactions of OH radicals with alkanes and cycloalkanes
Kinetics gas-phase reactions OH radicals alkanes cycloalkanes
2009/3/11
The available database concerning rate constants for gas-phase reactions of the hydroxyl (OH) radical with alkanes through early 2003 is presented over the entire temperature range for which measureme...