Evidence of a LNOX influence on middle/upper troposphere ozone-mixing ratios at Dakar, senegal during Northern Hemisphere summer season

Gregory S. Jenkins; Moussa Gueye; Mamadou S. Drame; Seydi A. Ndiaye

doi:10.1002/asl2.489

Evidence of a LNO_X influence on middle/upper troposphere ozone-mixing ratios at Dakar, senegal during Northern Hemisphere summer season

Gregory S. Jenkins, Moussa Gueye, Mamadou S. Drame, Seydi A. Ndiaye

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Abstract

We present results for the vertical distribution of tropospheric ozone from 40 measurements at Dakar, Senegal (14.59°N, 17.5°W) from June to September of 2008, 2010, 2011 and 2012. Under pre-monsoon conditions (June), many dry air intrusions are found in the lower troposphere transitioning to humid conditions during July, August and September. Measurements show the highest ozone-mixing ratios (50-100ppb) in the 400-200hPa layer and easterly wind flow during each month. Lightning-NO_X (LNO_X) is the only viable source to explain the vertical distribution of ozone, with a large amount of upstream lightning over West Africa during summer.

Original language	English (US)
Pages (from-to)	195-203
Number of pages	9
Journal	Atmospheric Science Letters
Volume	15
Issue number	3
DOIs	https://doi.org/10.1002/asl2.489
State	Published - 2014

All Science Journal Classification (ASJC) codes

Atmospheric Science

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10.1002/asl2.489

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title = "Evidence of a LNOX influence on middle/upper troposphere ozone-mixing ratios at Dakar, senegal during Northern Hemisphere summer season",

abstract = "We present results for the vertical distribution of tropospheric ozone from 40 measurements at Dakar, Senegal (14.59°N, 17.5°W) from June to September of 2008, 2010, 2011 and 2012. Under pre-monsoon conditions (June), many dry air intrusions are found in the lower troposphere transitioning to humid conditions during July, August and September. Measurements show the highest ozone-mixing ratios (50-100ppb) in the 400-200hPa layer and easterly wind flow during each month. Lightning-NOX (LNOX) is the only viable source to explain the vertical distribution of ozone, with a large amount of upstream lightning over West Africa during summer.",

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T1 - Evidence of a LNOX influence on middle/upper troposphere ozone-mixing ratios at Dakar, senegal during Northern Hemisphere summer season

AU - Jenkins, Gregory S.

AU - Gueye, Moussa

AU - Drame, Mamadou S.

AU - Ndiaye, Seydi A.

PY - 2014

Y1 - 2014

N2 - We present results for the vertical distribution of tropospheric ozone from 40 measurements at Dakar, Senegal (14.59°N, 17.5°W) from June to September of 2008, 2010, 2011 and 2012. Under pre-monsoon conditions (June), many dry air intrusions are found in the lower troposphere transitioning to humid conditions during July, August and September. Measurements show the highest ozone-mixing ratios (50-100ppb) in the 400-200hPa layer and easterly wind flow during each month. Lightning-NOX (LNOX) is the only viable source to explain the vertical distribution of ozone, with a large amount of upstream lightning over West Africa during summer.

AB - We present results for the vertical distribution of tropospheric ozone from 40 measurements at Dakar, Senegal (14.59°N, 17.5°W) from June to September of 2008, 2010, 2011 and 2012. Under pre-monsoon conditions (June), many dry air intrusions are found in the lower troposphere transitioning to humid conditions during July, August and September. Measurements show the highest ozone-mixing ratios (50-100ppb) in the 400-200hPa layer and easterly wind flow during each month. Lightning-NOX (LNOX) is the only viable source to explain the vertical distribution of ozone, with a large amount of upstream lightning over West Africa during summer.

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Evidence of a LNO_X influence on middle/upper troposphere ozone-mixing ratios at Dakar, senegal during Northern Hemisphere summer season

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