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Editorial Type:
Article
Article Type:
Research Article

Ozone Measurements from Eyewall Transects of Two Atlantic Tropical Cyclones

Thomas P. Carsey and Hugh E. Willoughby
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Print Publication:
01 Jan 2005
DOI:
https://doi.org/10.1175/MWR-2844.1
Page(s):
166–174
Restricted access

Abstract

Measurements of ozone (O3) concentrations obtained during aircraft eyewall crossings of Tropical Cyclones Floyd (September 1999) and Georges (September 1998) by NOAA P-3 hurricane research aircraft showed marked changes between the intensifying and weakening stages of the storms’ life cycles. Renewed deepening appeared to be underway near landfall of both storms. During intensification, ozone levels indicated that air either descended from an altitude <1 km above flight level or was strongly diluted with low-O3 eyewall air. During weakening, ozone concentrations were low throughout the eye and eyewall, consistent with the eye’s being filled with boundary layer air.

Corresponding author address: Dr. Thomas P. Carsey, National Oceanic and Atmospheric Administration/Atlantic Oceanographic and Meteorological Laboratory, 4301 Rickenbacker Causeway, Miami, FL 33149. Email: thomas.p.carsey@noaa.gov

Abstract

Measurements of ozone (O3) concentrations obtained during aircraft eyewall crossings of Tropical Cyclones Floyd (September 1999) and Georges (September 1998) by NOAA P-3 hurricane research aircraft showed marked changes between the intensifying and weakening stages of the storms’ life cycles. Renewed deepening appeared to be underway near landfall of both storms. During intensification, ozone levels indicated that air either descended from an altitude <1 km above flight level or was strongly diluted with low-O3 eyewall air. During weakening, ozone concentrations were low throughout the eye and eyewall, consistent with the eye’s being filled with boundary layer air.

Corresponding author address: Dr. Thomas P. Carsey, National Oceanic and Atmospheric Administration/Atlantic Oceanographic and Meteorological Laboratory, 4301 Rickenbacker Causeway, Miami, FL 33149. Email: thomas.p.carsey@noaa.gov

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