Multiyear Analysis of Ground-Based Sunphotometer (AERONET) Aerosol Optical Properties and Its Comparison with Satellite Observations over West Africa

Oluleye A

Multiyear Analysis of Ground-Based Sunphotometer (AERONET) Aerosol Optical Properties and Its Comparison with Satellite Observations over West Africa

Oluleye A * §

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§ Federal University of Technology, Akure, Nigeria.

Multiyear Analysis of Ground-Based Sunphotometer (AERONET) Aerosol Optical Properties and Its Comparison with Satellite Observations over West Africa

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Abstract

The Sahelian West Africa (Long 20W:20E, Lat 0:30N) by its climatological and geographical conditions is a key region for the characterization of global atmospheric aerosol optical properties. This study evaluates the spatial and temporal variation of the Aerosol Optical Depth (AOD440nm), aerosol particle size characterization (Angstrom exponent (α440-675nm) at four locations (Agoufou, Banizoumbou, Cape Verde and Ilorin) over a period of January 2005 to December 2009. Results of the day-to-day AOD440nm variations as well as the seasonal and annual variations are presented in order to establish the aerosol climatology in the region. We compared satellite derived data of Total Ozone Mapping Spectrometer -Aerosol Index (TOMS-AI), MODIS (Terra and Aqua) with those of ground-based Sunphotometer AERONET measurements. In general, there exits good relationship between MODIS (Terra and Aqua) and the ground-based AERONET measurements with correlation coefficients, R2 › 0.8 reported in all stations. However low coefficients (as low as 0.40) were obtained in all the stations for regressions between TOMS AI and ground-based Sunphotometer AERONET data.

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Funding

No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

Ethical Approval

No ethics committee approval was required for this article type.

Data Availability

Not applicable for this article.

How to Cite This Article

Oluleye A. 2012. "Multiyear Analysis of Ground-Based Sunphotometer (AERONET) Aerosol Optical Properties and Its Comparison with Satellite Observations over West Africa". Global Journal of Human-Social Science - B: Geography, Environmental Science & Disaster Management GJHSS-B Volume 12 (GJHSS Volume 12 Issue B10).

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GJHSS Volume 12 Issue B10

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Journal Specifications

Crossref Journal DOI 10.17406/GJHSS

Print ISSN 0975-587X

e-ISSN 2249-460X

Keywords

AERONET AOD Angstrom exponent MODIS TOMS-AI

Classification

GJHSS-B Classification FOR Code: 160511

160507

Submission ReceivedJune 5, 2012
Peer Review Double Blind
Handling Editor
Accepted July 1, 2012
Published July 15, 2012

Version of record

v1.2

Issue date

August 31, 2012

Language

English

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Article Matrices

Total Score: 110

Country: Nigeria

Subject: Global Journal of Human-Social Science

Authors: Dr. Ogunjobi K.O, Oluleye A, Bernard A, Ajayi V.O, Akinsanola A.A. (PhD/Dr. count: 1)

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