搜索结果: 1-15 共查到“大气化学 Changes”相关记录18条 . 查询时间(0.214 秒)
Detecting the influence of fossil fuel and bio-fuel black carbon aerosols on near surface temperature changes
fossil fuel bio-fuel black carbon aerosols surface temperature
2011/2/24
Past research has shown that the dominant influence on recent global climate changes is from anthropogenic greenhouse gas increases with implications for future increases in global temperatures. One m...
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...
Ozone response to emission changes: a modeling study during the MCMA-2006/MILAGRO Campaign
Ozone response emission changes the MCMA-2006/MILAGRO Campaign
2010/8/12
The sensitivity of ozone production to precursor emissions was investigated under five different meteorological conditions in the Mexico City Metropolitan Area (MCMA) during the MCMA-2006/MILAGRO fiel...
Effects of boundary layer particle formation on cloud droplet number and changes in cloud albedo from 1850 to 2000
boundary layer particle formation cloud droplet number cloud albedo
2010/2/1
We use a global aerosol microphysics model to estimate the effect of particle formation through activation nucleation in the boundary layer (BL) on cloud droplet number concentration (CDNC) on global ...
Generation of free convection due to changes of the local circulation system
free convection local circulation system
2009/11/19
Eddy-covariance and Sodar/RASS experimental measurement data of the COPS (Convective and Orographically-induced Precipitation Study) field campaign 2007 are used to investigate the generation of near-...
The effects of global changes upon regional ozone pollution in the United States
global changes regional ozone pollution United States
2009/3/13
A comprehensive numerical modeling framework was developed to estimate the effects of collective global changes upon ozone pollution in the US in 2050. The framework consists of the global climate and...
An exploration of ozone changes and their radiative forcing prior to the chlorofluorocarbon era
ozone changes radiative forcing chlorofluorocarbon era
2009/3/12
Using historical observations and model simulations, we investigate ozone trends prior to the mid-1970s onset of halogen-induced ozone depletion. Though measurements are quite limited, an analysis bas...
A three-dimensional model study of long-term mid-high latitude lower stratosphere ozone changes
three-dimensional model long-term mid-high latitude lower stratosphere ozone changes
2009/3/11
We have used a 3D off-line chemical transport model (CTM) to study the causes of the observed changes in ozone in the mid-high latitude lower stratosphere from 1979-1998. The model was forced by Europ...
Changes of daily surface ozone maxima in Switzerland in all seasons from 1992 to 2002 and discussion of summer 2003
daily surface ozone maxima Switzerland summer
2009/2/9
An Analysis of Covariance (ANCOVA) was used to derive the influence of the meteorological variability on the daily maximum ozone concentrations at 12 low-elevation sites north of the Alps in Switzerl...
Density changes of aerosol particles as a result of chemical reaction
Density changes aerosol particles chemical reaction
2009/1/23
This paper introduces the capability to study simultaneously changes in the density, the chemical composition, the mobility diameter, the aerodynamic diameter, and the layer thickness of multi-layered...
Changes in background aerosol composition in Finland during polluted and clean periods studied by TEM/EDX individual particle analysis
background aerosol composition Finland polluted and clean periods TEM/EDX individual particle
2009/1/16
Aerosol samples were collected at a rural background site in southern Finland in May 2004 during pollution episode (PM1~16 µg m−3, backward air mass trajectories from south-east), intermed...
Impact of climate variability and land use changes on global biogenic volatile organic compound emissions
climate variability land use changes global biogenic volatile organic compound
2009/1/9
A biogenic emissions scheme has been incorporated in the global dynamic vegetation model ORCHIDEE (Organizing Carbon and Hydrology in Dynamic EcosystEms) in order to calculate global biogenic emission...
Large-scale atmospheric circulation biases and changes in global climate model simulations and their importance for climate change in Central Europe
Large-scale atmospheric circulation global climate model simulations Central Europe
2009/1/5
The quality of global sea level pressure patterns has been assessed for simulations by 23 coupled climate models. Most models showed high pattern correlations. With respect to the explained spatial va...
Mid-latitude ozone changes: studies with a 3-D CTM forced by ERA-40 analyses
Mid-latitude ozone 3-D CTM ERA-40
2008/12/9
We have used an off-line three-dimensional (3-D) chemical transport model (CTM) to study long-term changes in stratospheric O3. The model was run from 1977–2004 and forced by ECMWF ERA-40 and operatio...