نتایج جستجو برای: aerosol na

تعداد نتایج: 294573  

2017
Nataliia Borodai

Satellite instruments are commonly used for measurements of aerosol optical properties in the atmosphere. In this work we use such measurements for ultra-high energy cosmic ray studies. We introduce a method of preparation of aerosol maps for the location of the Pierre Auger Observatory. For these maps the data from the Ozone Monitoring Instrument (OMI) of the Aura satellite were analyzed for t...

2007
J. N. Porter S. K. Sharma B. R. Lienert

Lidars are ideal for mapping the spatial distribution of aerosol concentrations, however efforts to convert the lidar measurements into estimates of the aerosol extinction or scattering coefficient are usually complicated. The difficulties arise from the uncertainty in the aerosol backscatter-to-extinction ratio and the lidar calibration. In marine conditions with little absorption, the aerosol...

2008
G. J. Roelofs

With the global aerosol-climate model ECHAM5HAM we investigate the potential influence of organic aerosol originating from the ocean on aerosol mass and chemical composition and the droplet concentration and size of marine clouds. We present sensitivity simulations in which the uptake of organic matter in the marine aerosol is prescribed for each aerosol mode with varying organic mass and mixin...

2014
Y. X. Bian C. S. Zhao N. Ma J. Chen W. Y. Xu

Water can be a major component of aerosol particles, also serving as a medium for aqueous-phase reactions. In this study, a novel method is presented to calculate the aerosol liquid water content at high relative humidity based on measurements of aerosol hygroscopic growth factor, particle number size distribution and relative humidity in the Haze in China (HaChi) summer field campaign (July–Au...

Journal: :Environmental science & technology 2001
D R Cocker R C Flagan J H Seinfeld

A state-of-the-art chamber facility is described for investigation of atmospheric aerosol chemistry. Dual 28 m3 FEP Teflon film chambers are used to simulate atmospheric conditions in which aerosol formation may occur. This facility provides the flexibility to investigate dark, single oxidant reactions as well as full photochemical simulations. This paper discusses the environmental control imp...

2013
S. Groß

Airborne high spectral resolution lidar observations over Europe during the EUCAARI-LONGREX field experiment in May 2008 are analysed with respect to the optical properties of continental pollution aerosol. Continental pollution aerosol is characterized by its depolarisation and lidar ratio. Over all, the measurements of the lidar ratio and the particle linear depolarization ratio of pollution ...

2011
U. K. Krieger

Introduction Conclusions References

2014
Zhen Wang Zhiyong Xie Axel Möller Wenying Mi Hendrik Wolschke

2010
Michael H Smith

The aim of this project is to characterise the aerosol found within the littoral zone for a wide range of conditions, and subsequently quantify the effects of this aerosol on the propagation of IR radiation and hence Naval elecro-optical systems. Measurements of aerosol concentration are used to calculate optical extinctions for a given set of environmental conditions and thus validate aerosol ...

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