Fine-Mode Aerosol Loading Over a Sub-Sahel Location and Its Relation with the West African Monsoon View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2018-06

AUTHORS

Okechukwu K. Nwofor, Victor N. Dike, Zhaohui Lin, Rachel T. Pinker, Nnaemeka D. Onyeuwaoma

ABSTRACT

The aerosol fine-mode fraction (FMF) at the sub-Sahel AErosol RObotic NETwork (AERONET) site at Ilorin (8°32′N; 4°34′E) is found to be the highest (FMFmean = 0.487) compared to six upper Sahel AERONET sites. The fine-mode aerosol population at the site dominates the coarse mode in core West African Monsoon months of June–July–August (FMFmean = 0.581; Angstrom exponent derivative = 0.44). Correlations (r) of aerosol optical depth (AOD) time series with corresponding seasonal zonal wind (ZW) and meridional wind (MW) speeds of the European Centre for Medium-Range Weather Forecasts at the seven AERONET sites reveal a uniquely strong positive value (r = 0.6) of wet-season AOD and MW at Ilorin. The wet-season FMF distribution at the site is bimodal with a broad mode (peak center = 0.685; half-width = 0.521) attributed to a wide range of industrial/urban aerosols and a narrow mode (peak center = 0.338; half-width = 0.136) attributed to fine dust aerosols, while the dry-season distribution is mono-modal, attributed to a fairly broad dust/biomass burning aerosol mixture (peak center = 0.484; half-width = 0.394). These are corroborated with 7-day back trajectories calculated for core wet- and dry-season months over 2 years indicating mainly high altitude maritime and continental air masses in the wet season and lower altitude Sahara and Sudanian air masses in the dry season. Comparison of inter-annual rainfall and FMF trends indicates coherence of intensifying rainfall in traditional dry-season months (December, January, and February) with decreasing FMF distribution means and increasing FMF distribution widths which are consistent with reducing dust and biomass burning aerosols and growing industrial and urban aerosol sources. More... »

PAGES

74-91

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s41810-018-0024-6

DOI

http://dx.doi.org/10.1007/s41810-018-0024-6

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1101530824


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Download the RDF metadata as:  json-ld nt turtle xml License info

HOW TO GET THIS DATA PROGRAMMATICALLY:

JSON-LD is a popular format for linked data which is fully compatible with JSON.

curl -H 'Accept: application/ld+json' 'https://scigraph.springernature.com/pub.10.1007/s41810-018-0024-6'

N-Triples is a line-based linked data format ideal for batch operations.

curl -H 'Accept: application/n-triples' 'https://scigraph.springernature.com/pub.10.1007/s41810-018-0024-6'

Turtle is a human-readable linked data format.

curl -H 'Accept: text/turtle' 'https://scigraph.springernature.com/pub.10.1007/s41810-018-0024-6'

RDF/XML is a standard XML format for linked data.

curl -H 'Accept: application/rdf+xml' 'https://scigraph.springernature.com/pub.10.1007/s41810-018-0024-6'


 

This table displays all metadata directly associated to this object as RDF triples.

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