搜索结果: 1-15 共查到“大气科学 in a rate”相关记录18条 . 查询时间(0.142 秒)
Human-driven carbon release rate unprecedented in past 66 million years
Human-driven carbon release rate past 66 million years
font style='font-size:12px;'>
2016/3/28
The earliest measurements of Earth's climate using thermometers and other tools start in the 1850s.To look further back in time, scientists investigate air bubbles trapped in ice cores, expanding the ...
Uptake of NO3 and N2O5 to Saharan dust, ambient urban aerosol and soot: a relative rate study
NO3 and N2O5 Saharan dust ambient urban aerosol and soot a relative rate study
font style='font-size:12px;'>
2010/8/12
The uptake of NO3 and N2O5 to Saharan dust, ambient aerosols and soot was investigated using a novel and simple relative rate method with simultaneous detection of both NO3 and N2O5. The use of cavity...
Changes in the production rate of secondary aerosol particles in Central Europe in view of decreasing SO2 emissions between 1996 and 2006
secondary aerosol particles Central Europe SO2 emissions
font style='font-size:12px;'>
2010/2/21
In anthropogenically influenced atmospheres, sulphur dioxide (SO2) is the main precursor of gaseous sulphuric acid (H2SO4), which in turn is a main precursor for atmospheric particle nucleation. As a ...
Impact of dust aerosols on the radiative budget, surface heat fluxes, heating rate profiles and convective activity over West Africa during March 2006
dust aerosols surface heat fluxes convective activity West Africa
font style='font-size:12px;'>
2009/9/27
The present work analyses the effect of dust aerosols on the surface and top of atmosphere radiative budget, surface temperature, sensible heat fluxes, atmospheric heating rate and convective activity...
Methyl chavicol: characterization of its biogenic emission rate, abundance, and oxidation products in the atmosphere
Methyl chavicol biogenic emission rate abundance oxidation products atmosphere
font style='font-size:12px;'>
2009/3/31
We report measurements of ambient atmospheric mixing ratios for methyl chavicol and determine its biogenic emission rate. Methyl chavicol, a biogenic oxygenated aromatic compound, is abundant within a...
298 K rate coefficients for the reaction of OH with i - C3H7I, n - C3H7I and C3H8
298 K rate coefficients OH i - C3H7I n - C3H7I C3H8
font style='font-size:12px;'>
2009/3/12
The kinetics of the title reactions were investigated using the laser photolysis - resonance fluorescence method, employing the sequential two-photon dissociation of NO2 in the presence of H2 as the ...
The rate of water vapor evaporation from ice substrates in the presence of HCl and HBr: implications for the lifetime of atmospheric ice particles
water vapor evaporation ice substrates HCl HBr atmospheric ice particles
font style='font-size:12px;'>
2009/3/11
Using a multidiagnostic approach the rate Rev [ molec cm-3 s-1] or flux Jev [ molec cm-2 s-1] of evaporation of H2O and its corresponding rate constant for condensation, kcond [s-1 ], on a 1 µm ...
Influence of the ice growth rate on the incorporation of gaseous HCl
ice growth rate incorporation gaseous HCl
font style='font-size:12px;'>
2009/3/10
Ice crystals were grown in the laboratory at −15°C, at different growth rates and in the presence of a partial pressure of HCl of 1.63×10-3 Pa, to test whether the ice growth rate influences the...
Ion production rate in a boreal forest based on ion, particle and radiation measurements
Ion production rate boreal forest ion particle radiation
font style='font-size:12px;'>
2009/3/6
In this study the ion production rates in a boreal forest were studied based on two different methods: 1) cluster ion and particle concentration measurements, 2) external radiation and radon concentra...
Absolute absorption cross-section and photolysis rate of I2
Absolute absorption cross-section photolysis rate I2
font style='font-size:12px;'>
2009/3/4
Following recent observations of molecular iodine (I2) in the coastal marine boundary layer (MBL) (Saiz-Lopez and Plane, 2004), it has become important to determine the absolute absorption cross-secti...
Cluster activation theory as an explanation of the linear dependence between formation rate of 3nm particles and sulphuric acid concentration
Cluster activation theory linear dependence formation rate of 3nm particles sulphuric acid concentration
font style='font-size:12px;'>
2009/1/4
According to atmospheric observations new particle formation seems to be a function of sulphuric acid concentration to the power from one to two. The nucleation theorem then predicts that the critical...
Emission rate and chemical state estimation by 4-dimensional variational inversion
Emission rate chemical state 4-dimensional variational inversion
font style='font-size:12px;'>
2008/12/15
This study aims to assess the potential and limits of an advanced inversion method to estimate pollutant precursor sources mainly from observations. Ozone, sulphur dioxide, and partly nitrogen oxides ...
Predicting terrestrial 222Rn flux using gamma dose rate as a proxy
222Rn flux gamma dose rate proxy
font style='font-size:12px;'>
2008/12/11
222Rn is commonly used as a natural tracer for validating climate models. To improve such models a better source term for 222Rn than currently used is necessary. The aim of this work is to establish a...
Absolute rate constant and O(3P) yield for the O(1D)+N2O reaction in the temperature range 227 K to 719 K
Absolute rate constantl O(3P) yield O(1D)+N2O reaction
font style='font-size:12px;'>
2008/11/24
The absolute rate constant for the reaction that is the major source of stratospheric NOx, O(1D)+N2O → products, has been determined in the temperature range 227 K to 719 K, and, in the temperature ra...
The effect of organic compounds on the growth rate of cloud droplets in marine and forest settings
organic compounds cloud droplets marine forest
font style='font-size:12px;'>
2008/11/21
Organic matter represents an important fraction of the fine particle aerosol, yet our knowledge of the roles of organics in the activation of aerosol particles into cloud droplets is poor.