Early calibration problems detected in TOMS Earth-Probe aeorosol signal

P. Kiss, I. M. Jánosi, O. Torres

Research output: Contribution to journalArticle

25 Citations (Scopus)


TOMS (version 8) ozone and aerosol data are analyzed in order to extract characteristic temporal patterns on a near global scale. A clear annual cycle of the global average for the ozone is apparent in the measured intervals (Nimbus-7: 1978-1993, Earth-Probe: 1996-2005), however a similar initial periodicity disappears for the aerosol index in the Earth-Probe records. A detailed spectral analysis revealed significant asymmetries in the Nimbus-7 aerosol signal for the two hemispheres, which is not present in Earth-Probe data. The available record from the Ozone Monitoring Instrument (one and a half years) shows a return to the seasonal variability seen by Nimbus-7 in both hemispheres. This suggests that calibration difficulties of the Earth-Probe instrument started earlier than mid 2000, when it became apparent from many indications.

Original languageEnglish
Article numberL07803
JournalGeophysical Research Letters
Issue number7
Publication statusPublished - Apr 16 2007

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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