Recalculation of 11-year total ozone of Brewer spectrophotometer 115

Ka Se Lam, V. Savastiouk, W. Y. Fung, T. K. Chan, K. Lamb

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)


Ground-based total ozone (O3) has been measured by Brewer 115 at Hong Kong (Cape D'Aguilar, 22°13′N, 114°15′E, 64 m above mean sea level). Long-term observations between 1995 and 2005 show that the sensitivity of outdoor spectrophotometers exhibit long-term drift. Despite the undesirable sensitivity shift, high-quality total ozone observations can still be achieved so long as the spectrophotometer is well maintained and calibrated regularly, and appropriate corrections applied to the data. The recalculated ground-based total ozone also shows good agreement with the satellite (Total Ozone Mapping Spectrometer (TOMS) version 8) data and Brewer 61 (Chengkung: 23°05′, 121°21′). The procedures and experience of a total ozone trend analysis using multiple linear regression that account for upper level temperatures, QBO, AOD, sun spot activities, and El Niño were reported for future reference. It can be concluded that no ozone depletion was observed over Hong Kong in this time period.
Original languageEnglish
Article numberD15104
JournalJournal of Geophysical Research Atmospheres
Issue number15
Publication statusPublished - 16 Aug 2007

ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology


Dive into the research topics of 'Recalculation of 11-year total ozone of Brewer spectrophotometer 115'. Together they form a unique fingerprint.

Cite this