搜索结果: 46-60 共查到“大气化学 Aerosol”相关记录311条 . 查询时间(0.25 秒)
Sensitivity of a global model to the uptake of N2O5 by tropospheric aerosol
a global model N2O5 tropospheric aerosol
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2010/8/16
The uptake of N2O5 on aerosol impacts atmospheric concentrations of NOx and so O3, OH, and hence CH4. Laboratory studies show significant variation in the rate of uptake, with a general decline in the...
The importance of aerosol mixing state and size-resolved composition on CCN concentration and the variation of the importance with atmospheric aging of aerosols
aerosol mixing state size-resolved composition CCN concentration atmospheric aerosols
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2010/8/16
Aerosol microphysics, chemical composition, and CCN concentrations were measured at the T0 urban supersite in Mexico City during Megacity Initiative: Local and Global Research Observations (MILAGRO) i...
Role of aldehyde chemistry and NOx concentrations in secondary organic aerosol formation
aldehyde chemistry NOx concentrations secondary organic aerosol formation
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2010/8/16
Aldehydes are an important class of products from atmospheric oxidation of hydrocarbons. Isoprene (2-methyl-1,3-butadiene), the most abundantly emitted atmospheric non-methane hydrocarbon, produces a ...
Empirical estimates of CCN from aerosol optical properties at four remote sites
Empirical estimates CCN aerosol optical properties four remote sites
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2010/8/16
This study presents an empirical method to estimate the CCN concentration as a function of percent supersaturation. The aerosol optical properties, backscatter fraction and single scatter albedo, func...
Sensitivity tests for an ensemble Kalman filter for aerosol assimilation
an ensemble Kalman filter aerosol assimilation
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2010/8/16
We present sensitivity tests for a global aerosol assimilation system utilizing AERONET observations of AOT (aerosol optical thickness) and AAE (aerosol Ångström exponent). The assimilation...
A multi-decadal history of biomass burning plume heights identified using aerosol index measurements
biomass burning plume heights aerosol index measurements
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2010/8/16
We have quantified the relationship between Aerosol Index (AI) measurements and plume height for young biomass burning plumes using coincident Ozone Monitoring Instrument (OMI) and Cloud-Aerosol Lidar...
Tropospheric aerosol size distributions simulated by three online global aerosol models using the M7 microphysics module
Tropospheric aerosol size distributions three online global aerosol models the M7 microphysics module
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2010/8/16
Tropospheric aerosol size distributions are simulated by three online global models which employ exactly the same aerosol microphysics module, but differ in many aspects such as model meteorology, nat...
Comparison of a global-climate model to a cloud-system resolving model for the long-term response of thin stratocumulus clouds to preindustrial and present-day aerosol conditions
a global-climate model a cloud-system resolving model thin stratocumulus clouds present-day aerosol conditions
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2010/8/16
The response of a case of thin, warm marine-boundary-layer (MBL) clouds to preindustrial (PI) and present-day (PD) conditions is simulated by a cloud-system resolving model (CSRM). Here, both the aero...
Dicarboxylic acids, metals and isotopic compositions of C and N in atmospheric aerosols from inland China: implications for dust and coal burning emission and secondary aerosol formation
Dicarboxylic acids C N atmospheric aerosols inland China dust and coal burning emission secondary aerosol formation
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2010/8/16
Dicarboxylic acids (C2–C10), metals, elemental carbon (EC), organic carbon (OC), and stable isotopic compositions of total carbon (TC) and total nitrogen (TN) were determined for PM10 samples collecte...
Anthropogenic aerosol radiative forcing in Asia derived from regional models with atmospheric and aerosol data assimilation
Anthropogenic aerosol radiative Asia regional models atmospheric aerosol data assimilation
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2010/8/16
An estimate of monthly 3-D aerosol solar heating rates and surface solar fluxes in Asia from 2001 to 2004 is described here. This product stems from an Asian aerosol assimilation project, in which a) ...
Estimated total emissions of trace gases from the Canberra Wildfires of 2003: a new method using satellite measurements of aerosol optical depth & the MOZART chemical transport model
the Canberra Wildfires of 2003 aerosol optical depth the MOZART chemical transport model
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2010/8/13
In this paper we describe a new method for estimating trace gas emissions from large vegetation fires using satellite measurements of aerosol optical depth (AOD) at 550 nm, combined with an atmospheri...
Chemical evolution of secondary organic aerosol from OH-initiated heterogeneous oxidation
Chemical evolution secondary organic aerosol OH-initiated heterogeneous oxidation
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2010/8/13
The heterogeneous oxidation of laboratory Secondary Organic Aerosol (SOA) particles by OH radicals was investigated. SOA particles, produced by reaction of α-pinene and O3, were exposed to OH radicals...
The role of the particle size distribution in assessing aerosol composition effects on simulated droplet activation
the particle size distribution aerosol composition effects simulated droplet activation
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2010/8/13
Variations in the chemical composition of atmospheric aerosols alter their hygroscopicity and can lead to changes in the cloud-active fraction of the aerosols, or cloud condensation nuclei (CCN) numbe...
Mexico city aerosol analysis during MILAGRO using high resolution aerosol mass spectrometry at the urban supersite (T0) – Part 2: Analysis of the biomass burning contribution and the non-fossil carbon fraction
MILAGRO high resolution aerosol mass spectrometry the urban supersite the biomass burning contribution the non-fossil carbon fraction
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2010/8/13
Submicron aerosol was analyzed during the MILAGRO field campaign in March 2006 at the T0 urban supersite in Mexico City with a High-Resolution Aerosol Mass Spectrometer (AMS) and complementary instrum...
Global distribution of the effective aerosol hygroscopicity parameter for CCN activation
Global distribution the effective aerosol hygroscopicity parameter CCN activation
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2010/8/13
In this study we use the ECHAM/MESSy Atmospheric Chemistry (EMAC) model to simulate global fields of the effective hygroscopicity parameter κ which approximately describes the influence of chemical co...