TY - JOUR
T1 - Multi-site tropospheric ozone measurements across the North Tropical Atlantic during the summer of 2010
AU - Jenkins, Gregory S.
AU - Robjhon, Miliaritiana L.
AU - Demoz, Belay
AU - Stockwell, William R.
AU - Ndiaye, Seydi A.
AU - Drame, Mamadou S.
AU - Gueye, Moussa
AU - Smith, Jonathan W.
AU - Luna-Cruz, Yaitza
AU - Clark, Johnathan
AU - Holt, Jalisa
AU - Paulin, Casey
AU - Brickhouse, Ashley
AU - Williams, Aneese
AU - Abdullah, Ajamu
AU - Reyes, Ashford
AU - Mendes, Luis
AU - Valentine, Adriel
AU - Camara, Moctar
N1 - Funding Information:
We acknowledge the mission scientists and Principal Investigators from the NASA GES DISC, who provided the GIOVANNI data used in this research effort. We thank Didier Tanre, the Principal Investigator of the “Capo Verde” and “Dakar” sites for the availability of the AERONET data. We also thank the NOAA/OAR/ESRL PSD, Boulder, Coloradofor providing with the interpolated OLR data. We also thank the sponsors of the Cape Verde Atmospheric Observatory. This work was supported by Howard University, Cheikh Anta Diop University, University of Ziguinchor, Instituto Nacional de Meteorologia e Geofisica, Caribbean Institute for Meteorology and Hydrology, and the National Science Foundation under the Grant number AGS# 1013179.
Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2013/5
Y1 - 2013/5
N2 - Ozone soundings are launched during two Intensive Observing Periods (IOPs) from Dakar, Senegal; Sao Vicente, Cape Verde; and St James, Barbados to investigate ozone variability across the North Tropical Atlantic during June/July and August/September 2010. Two objectives of the campaign are to compare background tropospheric ozone mixing ratios and its variability associated with the Saharan Air Layer (SAL) and African Easterly Waves (AEWs) at sites located in the Eastern and Western Tropical Atlantic Ocean. During IOP1 (June-July), reduced ozone mixing ratios are found in the SAL with elevated ozone levels at the SAL's base and above it. During IOP I, the tropospheric column ozone (TCO) is higher at Cape Verde (27.5 DU) when compared to Barbados (19.8 DU). During IOP II (August-September) ozone-rich air is found above 500 hPa prior to the passage of AEW or developing tropical cyclones. The observed larger mixing ratios of middle/upper tropospheric ozone are most prominent at Dakar prior to the passage of an AEW, which we attribute to lightning NOx. During IOP II the tropospheric column ozone is highest at Dakar (30.5 DU) when compared to Cape Verde (20.2 DU) and Barbados (17.2 DU).
AB - Ozone soundings are launched during two Intensive Observing Periods (IOPs) from Dakar, Senegal; Sao Vicente, Cape Verde; and St James, Barbados to investigate ozone variability across the North Tropical Atlantic during June/July and August/September 2010. Two objectives of the campaign are to compare background tropospheric ozone mixing ratios and its variability associated with the Saharan Air Layer (SAL) and African Easterly Waves (AEWs) at sites located in the Eastern and Western Tropical Atlantic Ocean. During IOP1 (June-July), reduced ozone mixing ratios are found in the SAL with elevated ozone levels at the SAL's base and above it. During IOP I, the tropospheric column ozone (TCO) is higher at Cape Verde (27.5 DU) when compared to Barbados (19.8 DU). During IOP II (August-September) ozone-rich air is found above 500 hPa prior to the passage of AEW or developing tropical cyclones. The observed larger mixing ratios of middle/upper tropospheric ozone are most prominent at Dakar prior to the passage of an AEW, which we attribute to lightning NOx. During IOP II the tropospheric column ozone is highest at Dakar (30.5 DU) when compared to Cape Verde (20.2 DU) and Barbados (17.2 DU).
UR - http://www.scopus.com/inward/record.url?scp=84873490207&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84873490207&partnerID=8YFLogxK
U2 - 10.1016/j.atmosenv.2012.12.019
DO - 10.1016/j.atmosenv.2012.12.019
M3 - Article
AN - SCOPUS:84873490207
SN - 1352-2310
VL - 70
SP - 131
EP - 148
JO - Atmospheric Environment
JF - Atmospheric Environment
ER -