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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
The influence of the SAL and lightning on tropospheric ozone variability over the Northern Tropical Atlantic: Results from Cape Verde during 2010
Geophysical Research Letters, Volume 39, No. 20, Article L20810, Year 2012
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Description
We present results for multiple Saharan Air Layer (SAL) events and their relationship to tropospheric ozone mixing ratios that were observed in the Eastern Atlantic during the summer of 2010 using ozonesondes. In particular, 5 SAL events are sampled during 2010 in Cape Verde indicting a reduction of ozone mixing ratios throughout much of the SAL layer, except near the base of the SAL. In this layer of enhanced ozone mixing ratio, we find increases of 20-30 ppb in some cases between non-SAL and SAL conditions. In addition, ozone concentrations are enhanced above the SAL layer, with trajectories suggesting enhancements by lightning from the middle/upper troposphere with outflow from Africa. Additional aircraft measurements are required to examine the chemical and aerosol distributions from the Marine Boundary Layer (MBL) through the upper troposphere to determine the heterogeneous chemical processes related to reduced ozone mixing ratio, and further quantify elevated ozone mixing ratios at the base of the SAL and above the SAL. © 2012. American Geophysical Union. All Rights Reserved.
Authors & Co-Authors
Jenkins, Gregory S.
United States, Washington, D.c.
Howard University
Robjhon, Miliaritiana L.
United States, Washington, D.c.
Howard University
Smith, Jonathan W.
United States, Washington, D.c.
Howard University
Clark, Johnathan
United States, Washington, D.c.
Howard University
Mendes, Luis M.
Cape Verde, Ilha do Sal
Instituto Nacional de Metereologia e Geofisica Ilha do Sal
Statistics
Citations: 12
Authors: 5
Affiliations: 2
Identifiers
Doi:
10.1029/2012GL053532
ISSN:
00948276
Research Areas
Environmental
Study Locations
Cabo Verde