Št. zadetkov: 10
Izvirni znanstveni članek
Oznake:
dispersion;tracers;intermittency;
The short time‐scale variability in pollutant concentrations in an urban street under very low wind speed conditions and short source–receptor distance has been investigated using the inert tracer sulfur hexafluoride (SF6) as a continuous point‐source (release times ≥ 5 min), and fast detection usin ...
Leto:
2008
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)
Izvirni znanstveni članek
Oznake:
CH3Br;rapeseed;Brassica;ozone;biosphere;
Gan et al. [Gan, J., Yates, S.R., Ohr, H.D., Sims, J.J., 1998. Production of methyl bromide by terrestrial higher plants. Geophysical Research Letters 25 (19), 3595–3598] have reported that plants of the family Brassicaceae take up bromide from soils and subsequently release methyl bromide (CH3Br) t ...
Leto:
2008
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)
Izvirni znanstveni članek
Oznake:
Africa;biofuel;domestic biomass burning;emission factor;biospheremethyl halide;
Inventories of methyl halide emissions from domestic burning of biomass in Africa, from 1950 to the present day and projected to 2030, have been constructed. By combining emission factors from Andreae and Merlet [2001. Emission of trace gases and aerosols from biomass burning. Global Biogeochemical ...
Leto:
2008
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)
Izvirni znanstveni članek
Oznake:
adsorption desorption system;automated thermal desorber;electron capture detector;gas chromatography;isotope ratio mass spectrometry;
∂13C values of a suite of halocarbons have been determined in an urban background site in Bristol, UK. A novel mobile preconcentration system, based on the use of multi-adsorbent sample tubes, has been developed for trapping relatively large-volume air samples in potentially remote areas. An Adsorpt ...
Leto:
2008
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)
Izvirni znanstveni članek
Oznake:
air quality;atmospheric chemistry;convective system;public health,;
In June 2006, two perfluorocarbon tracer experiments were conducted in central Manchester UK as part of the CityFlux campaign. The main aim was to investigate vertical dispersion in an urban area during convective conditions, but dispersion mechanisms within the street network were also studied. Pai ...
Leto:
2010
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)
Izvirni znanstveni članek
Oznake:
adsorption-desorption system;anthropogenic halocarbons;biogenic halocarbons;electron capture detector;gas chromatography;methyl bromide;
The mixing ratios of 11 C1–C3 halocarbons have been measured using a GC–twin‐linked ECD system over the period from October 2004 to December 2005 at an urban site in Bristol, UK. Time series and seasonal variations of the halocarbons were analysed over the period to determine biogenic and anthropoge ...
Leto:
2009
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)
Izvirni znanstveni članek
Oznake:
concentration;dispersion;urban atmosphere;
There have been relatively few tracer experiments carried out that have looked at vertical plume spread in urban areas. In this paper we present results from two tracer (cyclic perfluorocarbon) experiments carried out in 2006 and 2007 in central London centred on the BT Tower as part of the REPARTEE ...
Leto:
2011
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)
Izvirni znanstveni članek
Oznake:
reactive tracers;OH radicals;NO3 radicals;oxidising rate;dispersion;urban;
Using a specifically designed chemical tracer to indirectly measure local atmospheric hydroxyl radical (OH) concentrations is a very appealing concept. Such a tracer will provide information on the amount of OH a tracer encounters, as it moves through the urban environment and provide a stringent te ...
Leto:
2014
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)
Izvirni znanstveni članek
Oznake:
ozone;indoor air pollution;indoor ozone;chemical tracers;
The hydroxyl radical (OH) plays a key role in determining indoor air quality. However, its highly reactive nature and low concentration indoors impede direct analysis. This paper describes the techniques used to indirectly quantify indoor OH, including the development of a new method based on the in ...
Leto:
2010
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)
Dudley E. Shallcross,
D. Martin,
C. S. Price,
Graham Nickless,
I. R. White,
F. K. Petersson,
R. E. Britter,
M. K. Neophytou,
J. E. Tate,
A. S. Tomlin,
S. E. Belcher,
J. F. Barlow,
Alan Robinson
Izvirni znanstveni članek
Oznake:
dapple;perfluorocarbon;tracers;mobile sources;
Four perfluorocarbon tracer dispersion experiments were carried out in central London, United Kingdom in 2004. These experiments were supplementary to the dispersion of air pollution and penetration into the local environment (DAPPLE) campaign and consisted of ground level releases, roof level relea ...
Leto:
2009
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)