La Nina and El Nino-induced variabilities of ozone in the tropical lower atmosphere during 1970-2001

Details La Nina and El Nino-induced variabilities of ozone in the tropical lower atmosphere during 1970-2001 La Nina and El Nino-induced variabilities of ozone in the tropical lower atmosphere during 1970-2001

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30c..42z&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 3, pp. 42-1, CiteID 1142, DOI 10.1029/2002GL016387

Physics

19

Meteorology And Atmospheric Dynamics: Ocean/Atmosphere Interactions (0312, 4504), Meteorology And Atmospheric Dynamics: Tropical Meteorology, Atmospheric Composition And Structure: Troposphere-Composition And Chemistry, Atmospheric Composition And Structure: Troposphere-Constituent Transport And Chemistry, Global Change: Atmosphere (0315, 0325)

Scientific paper

This study provides the first evidence from several decades of satellite measurements that both La Nina and El Nino events have a comparable and dramatic impact in altering the interannual variability and distribution of tropospheric ozone in the tropics. Measurements of tropospheric ozone were combined from several total ozone mapping spectrometer (TOMS) and backscatter ultraviolet (BUV) satellite instruments to establish long time series in the tropics extending from April 1970 through December 2001. The changes in tropospheric column ozone (TCO) for both La Nina and El Nino are sizeable when compared to local values which average from less than 15 Dobson Units (DU) up to 25 DU over the year. It is suggested that interannual changes in TCO from combined La Nina and El Nino are the dominant source of decadal variability in the tropics.

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