Journal ArticleDOI
Aerosol optical depth over a remote semi-arid region of South Africa from spectral measurements of the daytime solar extinction and the nighttime stellar extinction
Paola Formenti,Hartmut Winkler,P. Fourie,Stuart Piketh,B. Makgopa,G. Helas,Meinrat O. Andreae +6 more
TLDR
Spectral daytime aerosol optical depths have been measured at Sutherland, South Africa (32°22′S, 20°48′E), from January 1998 to November 1999, and the comparison of daytime and nighttime measurements for the years 1998-1999 makes it possible to validate the astronomical dataset of aerosol infrared depth ( τ a ) dating back to 1991 as mentioned in this paper.About:
This article is published in Atmospheric Research.The article was published on 2002-05-01. It has received 30 citations till now. The article focuses on the topics: Haze & Aerosol.read more
Citations
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Journal ArticleDOI
Updated African biomass burning emission inventories in the framework of the AMMA-IDAF program, with an evaluation of combustion aerosols
Catherine Liousse,B. Guillaume,Jean-Marie Grégoire,Marc Mallet,C. Galy,Véronique Pont,Aristide Akpo,M. Bedou,Pierre Castera,L. Dungall,Eric Gardrat,Claire Granier,Claire Granier,Claire Granier,Abdourahamane Konaré,Florent Malavelle,A. Mariscal,Aude Mieville,R. Rosset,Dominique Serça,Fabien Solmon,F. Tummon,Eric-Michel Assamoi,Véronique Yoboué,P. F. J. van Velthoven +24 more
TL;DR: In this paper, the ORISAM-TM4 global chemistry transport model was used to evaluate the aerosol optical properties of African biomass burning emission inventories for gases and particles (AMMABB) for the 2000-2007 period.
Journal ArticleDOI
An overview of regional and local characteristics of aerosols in South Africa using satellite, ground, and modeling data.
S. P. Hersey,S. P. Hersey,Rebecca M. Garland,Rebecca M. Garland,Ewan Crosbie,Taylor Shingler,Armin Sorooshian,Stuart Piketh,Roelof Burger +8 more
TL;DR: Results from ground monitoring indicate that low-income township sites experience by far the worst particulate air quality in South Africa, with seasonally averaged PM10 concentrations as much as 136 % higher in townships that in industrial areas.
Journal ArticleDOI
Atmospheric boundary layer top height in South Africa: measurements with lidar and radiosonde compared to three atmospheric models
Kimmo Korhonen,Kimmo Korhonen,E. Giannakaki,Tero Mielonen,A. Pfüller,Lauri Laakso,Lauri Laakso,Ville Vakkari,Ville Vakkari,Holger Baars,Ronny Engelmann,Johan P. Beukes,P. G. van Zyl,Avishkar Ramandh,L. Ntsangwane,Miroslav Josipovic,Petri Tiitta,Petri Tiitta,Gerhardus D. Fourie,I. Ngwana,K. Chiloane,Mika Komppula +21 more
TL;DR: In this paper, a long-term study of PBL top heights and PBL growth rates in South Africa was conducted using ground-based and satellite LIDAR measurements, and the results indicated that the ECMWF model agreed the best with mean relative difference of 15.4%, while the second best correlation was with the SAWS model with corresponding difference of 20.1%.
Journal ArticleDOI
Inferring wavelength dependence of AOD and Ångström exponent over a sub-tropical station in South Africa using AERONET data: influence of meteorology, long-range transport and curvature effect.
K. Raghavendra Kumar,Venkataraman Sivakumar,R. Ramakrishna Reddy,K. Rama Gopal,A. Joseph Adesina +4 more
TL;DR: Trajectory cluster analyses revealed that the air masses during the autumn and winter seasons have longer advection pathways, passing over the ocean and continent, reflected in the aerosol properties that are derived from the ocean, desert, and anthropogenic activities that include biomass burning and industrial pollution.
Journal ArticleDOI
Screening the ESA ATSR-2 World Fire Atlas (1997 2002)
TL;DR: In this paper, the authors screened the algorithm 2 (308 K threshold) European Space Agency (ESA) World Fire Atlas (WFA), for the period 1997-2002, using ancillary land cover, night-lights and volcanic activity datasets, combined with statistical techniques to detect the occurrence of space-time clusters of anomalous observations.
References
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Journal ArticleDOI
AERONET-a federated instrument network and data archive for aerosol Characterization
Brent N. Holben,Thomas F. Eck,Ilya Slutsker,Didier Tanré,J. P. Buis,Alberto Setzer,Eric Vermote,John A. Reagan,Yoram J. Kaufman,Teruyuki Nakajima,François Lavenu,I. Jankowiak,Alexander Smirnov +12 more
TL;DR: The operation and philosophy of the monitoring system, the precision and accuracy of the measuring radiometers, a brief description of the processing system, and access to the database are discussed.
Journal ArticleDOI
Emission of trace gases and aerosols from biomass burning
Meinrat O. Andreae,P. Merlet +1 more
TL;DR: In this article, the authors present a set of emission factors for a large variety of species emitted from biomass fires, where data were not available, they have proposed estimates based on appropriate extrapolation techniques.
Journal ArticleDOI
Light scattering in planetary atmospheres
James Hansen,Larry D. Travis +1 more
TL;DR: In this paper, a review of scattering theory required for analysis of light reflected by planetary atmospheres is presented, which demonstrates the dependence of single-scattered radiation on the physical properties of the scatterers.
Journal ArticleDOI
Variability of Absorption and Optical Properties of Key Aerosol Types Observed in Worldwide Locations
Oleg Dubovik,Brent N. Holben,Thomas F. Eck,Thomas F. Eck,Alexander Smirnov,Yoram J. Kaufman,Michael D. King,Didier Tanré,Ilya Slutsker +8 more
TL;DR: In this paper, the AERONET network of ground-based radiometers were used to remotely sense the aerosol absorption and other optical properties in several key locations, and the results showed robust differentiation in both the magnitude and spectral dependence of the absorption, a property driving aerosol climate forcing.
Journal ArticleDOI
Biomass Burning in the Tropics: Impact on Atmospheric Chemistry and Biogeochemical Cycles
TL;DR: Widespread burning of biomass serves to clear land for shifting cultivation, to convert forests to agricultural and pastoral lands, and to remove dry vegetation in order to promote agricultural productivity and the growth of higher yield grasses, but it may also disturb biogeochemical cycles, especially that of nitrogen.
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An emerging ground-based aerosol climatology: Aerosol optical depth from AERONET
Brent N. Holben,Didier Tanré,Alexander Smirnov,Thomas F. Eck,Thomas F. Eck,Thomas F. Eck,Ilya Slutsker,Nader Abuhassan,W. W. Newcomb,Joel Schafer,Joel Schafer,Bernadette Chatenet,F. Lavenu,Yoram J. Kaufman,J. R. Vande Castle,Alberto Setzer,Brian L. Markham,Dennis K. Clark,Robert Frouin,Rangasayi N. Halthore,Rangasayi N. Halthore,A. Karneli,N. T. O'Neill,Christophe Pietras,Christophe Pietras,Rachel T. Pinker,Kenneth J. Voss,Giuseppe Zibordi +27 more