Vertical transport of ozone and CO during super cyclones in the Bay of Bengal as detected by Tropospheric Emission Spectrometer |
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Authors: | S Fadnavis G Beig P Buchunde Sachin D Ghude T N Krishnamurti |
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Institution: | (1) Indian Institute of Tropical Meteorology, Pune, India;(2) Departmant of Meteorology, Florida State University, Tallahassee, FL, USA |
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Abstract: | Vertical profiles of carbon monoxide (CO) and ozone retrieved from Tropospheric Emission Spectrometer have been analyzed during
two super cyclone systems Mala and Sidr. Super cyclones Mala and Sidr traversed the Bay of Bengal (BOB) region on April 24–29,
2006 and November 12–16, 2007 respectively. The CO and ozone plume is observed as a strong enhancement of these pollutants
in the upper troposphere over the BOB, indicating deep convective transport. Longitude–height cross-section of these pollutants
shows vertical transport to the upper troposphere. CO mixing ratio ~90 ppb is observed near the 146-mb level during the cyclone
Mala and near 316 mb during the cyclone Sidr. Ozone mixing ratio ~60–100 ppb is observed near the 316-mb level during both
the cyclones. Analysis of National Centers for Environmental Prediction (NCEP) reanalysis vertical winds (omega) confirms
vertical transport in the BOB. |
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