搜索结果: 1-15 共查到“大气化学 P-d effect”相关记录44条 . 查询时间(0.234 秒)
The effect of metal salts on quantification of elemental and organic carbon in diesel exhaust particles using thermal-optical evolved gas analysis
metal salts elemental and organic carbon diesel exhaust particles thermal-optical evolved gas analysis
2010/12/20
Thermal-optical evolved gas analysis (TOEGA) is a conventional method for classifying carbonaceous aerosols as organic carbon (OC) and elemental carbon (EC). Its main source of uncertainty arises from...
Impact of parametric uncertainties on the present-day climate and on the anthropogenic aerosol effect
parametric uncertainties the present-day climate the anthropogenic aerosol effect
2010/12/20
Clouds constitute a large uncertainty in global climate modeling and climate change projections as many clouds are smaller than the size of a model grid box. Some processes, such as the rates of rain ...
Enhancement of the aerosol direct radiative effect by semi-volatile aerosol components: airborne measurements in North-Western Europe
the aerosol direct radiative effect semi-volatile aerosol components airborne measurements North-Western Europe
2010/9/14
A case study of atmospheric aerosol measurements exploring the impact of the vertical distribution of aerosol chemical composition upon the radiative budget in North-Western Europe is presented. Sub-m...
Enhancing effect of dimethylamine in sulfuric acid nucleation in the presence of water – a computational study
dimethylamine sulfuric acid nucleation the presence of water
2010/8/13
We have studied the hydration of sulfuric acid – ammonia and sulfuric acid – dimethylamine clusters using quantum chemistry. We calculated the formation energies and thermodynamics for clusters of one...
Temperature effect on physical and chemical properties of secondary organic aerosol from m-xylene photooxidation
Temperature effect physical and chemical properties secondary organic aerosol m-xylene photooxidation
2010/8/12
The chemical and physical differences of secondary organic aerosol (SOA) formed at select isothermal temperatures (278 K, 300 K, and 313 K) are explored with respect to density, particle volatility, p...
Pressure dependence of the deuterium isotope effect in the photolysis of formaldehyde by ultraviolet light
the deuterium isotope effect the photolysis of formaldehyde ultraviolet light
2010/8/12
The pressure dependence of the relative photolysis rate of HCHO vs. HCDO has been investigated for the first time, using a photochemical reactor at the University of Copenhagen. The dissociation of HC...
Total aerosol effect: radiative forcing or radiative flux perturbation?
radiative forcing radiative flux perturbation
2010/8/12
Uncertainties in aerosol radiative forcings, especially those associated with clouds, contribute to a large extent to uncertainties in the total anthropogenic forcing. The interaction of aerosols with...
The effect of Arctic sea-ice extent on the absorbed（net）solar flux at the surface, based on ISCCP-D2 cloud data for 1983–2007
Arctic sea-ice absorbed solar flux ISCCP-D2 cloud data
2010/2/1
We estimate the effect of the Arctic sea ice on the absorbed (net) solar flux using a radiative transfer model. Ice and cloud input data to the model come from satellite observations, processed by the...
The effect of misleading surface temperature estimations on the sensible heat fluxes at a high Arctic site – the Arctic Turbulence Experiment 2006 on Svalbard (ARCTEX-2006)
misleading surface temperature sensible heat fluxes ARCTEX
2010/1/18
The observed rapid climate warming in the Arctic requires improvements in permafrost and carbon cycle monitoring, accomplished by setting up long-term observation sites with high-quality in-situ measu...
Effect of biomass burning on marine stratocumulus clouds off the California coast
biomass burning marine stratocumulus clouds California coast
2009/12/3
Aerosol-cloud interactions are considered to be one of the most important and least known forcings in the climate system. Biomass burning aerosols are of special interest due to their radiative impact...
Direct measurements of the effect of biomass burning over the Amazon on the atmospheric temperature profile
biomass burning Amazon atmospheric temperature profile
2009/11/19
Aerosols suspended in the atmosphere interact with solar radiation and clouds, thus change the radiation energy fluxes in the atmospheric column. In this paper we measure changes in the atmospheric te...
Effect of chemical mixing state on the hygroscopicity and cloud nucleation properties of calcium mineral dust particles
chemical mixing hygroscopicity cloud nucleation properties calcium mineral dust particles
2009/6/2
Atmospheric mineral dust particles can alter cloud properties and thus climate by acting as cloud condensation nuclei (CCN) that form cloud droplets. The CCN activation properties of various calcium m...
Secondary Organic Aerosol Formation from Acetylene（C2H2）: seed effect on SOA yields due to organic photochemistry in the aerosol aqueous phase
Secondary Organic Aerosol Formation Acetylen SOA yields organic photochemistry
2009/3/31
The lightest Non Methane HydroCarbon (NMHC), i.e., acetylene (C2H2) is found to form secondary organic aerosol (SOA). Contrary to current belief, the number of carbon atoms, n, for a NMHC to act as SO...
Modelled radiative forcing of the direct aerosol effect with multi-observation evaluation
Modelled radiative forcing direct aerosol effect multi-observation evaluation
2009/3/13
A high-resolution global aerosol model (Oslo CTM2) driven by meteorological data and allowing a comparison with a variety of aerosol observations is used to simulate radiative forcing (RF) of the dire...
Characteristics and direct radiative effect of mid-latitude continental aerosols：the ARM case
Characteristics and direct radiative effect mid-latitude continental aerosols ARM case
2009/3/11
A multi-year field measurement analysis of the characteristics and direct radiative effect of aerosols at the Southern Great Plains (SGP) central facility of the Atmospheric Radiation Measurement (ARM...