Effects of the 2006 El Niño on tropospheric composition as revealed by data from the Tropospheric Emission Spectrometer (TES)

The Tropospheric Emission Spectrometer (TES) is unique in providing multi-year coincident tropospheric profiles of CO, O₃ and H₂O. TES data show large differences in these gases over Indonesia and the eastern Indian Ocean in October-December 2006 relative to 2005. In 2006, O₃ was higher by 15-30 ppb (30-75%) while CO was higher by >80 ppb in October and November, and by ~25 ppb in December. These differences were caused by high fire emissions from Indonesia in 2006 associated with the lowest rainfall since 1997, reduced convection during the moderate El Niño, and reduced photochemical loss because of lower H₂O. The persistence of the O₃ difference into December is consistent with higher NOx emissions from lightning in 2006. TES CO and O₃ enhancements in 2006 were larger than those observed during the weak El Niño of 2004.

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An edited version of this paper was published by AGU. Copyright 2008 American Geophysical Union.
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Author Logan, Jennifer
Megretskaia, Inna
Nassar, Ray
Murray, Lee
Zhang, Lin
Bowman, Kevin
Worden, Helen
Luo, Ming
Publisher UCAR/NCAR - Library
Publication Date 2008-02-15T00:00:00
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Topic Category geoscientificInformation
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Metadata Date 2023-08-18T18:42:07.859602
Metadata Record Identifier edu.ucar.opensky::articles:6215
Metadata Language eng; USA
Suggested Citation Logan, Jennifer, Megretskaia, Inna, Nassar, Ray, Murray, Lee, Zhang, Lin, Bowman, Kevin, Worden, Helen, Luo, Ming. (2008). Effects of the 2006 El Niño on tropospheric composition as revealed by data from the Tropospheric Emission Spectrometer (TES). UCAR/NCAR - Library. http://n2t.net/ark:/85065/d7c24wmk. Accessed 21 June 2025.

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