Principal Investigator: Dr. Anne M. Thompson (NASA/Goddard Space Flight Center)

A number of ozonesonde stations are operating in the tropics, subtropics, and the southern hemisphere in general, but with differing frequency and reporting procedures. SHADOZ (Southern Hemisphere ADditional OZonesondes) is designed to remedy this data discrepancy, by coordinating launches, supplying additional sondes in some cases, and by providing a central archive location. Since 1998, ozonesonde data have been collected and made available through this website.

Questions regarding sonde data from specific stations should be directed to the stations' principal investigator. A list of PI contact information can be found on the PI CONTACTS link in the banner above.

Attention!! Ozonesonde Data Caveat!

• A number of global ozonesonde stations report a sharp "drop-off" in stratospheric & total column ozone (TCO) after ~2014.

• 8 SHADOZ stations exhibit a 2-6% "drop-off" in total ozone beginning 2014-2016, depending on the station. Click for more information.

• The dropoff appears to be an instrument artifact, not easily understood, that the community is investigating. Updates will be posted here.

• STATUS SUMMARY: V6 SHADOZ data, much improved over v5.2 data [Thompson et al., 2017; Witte et al., 2017; 2018], are recommended for model comparisons, climatology, satellite comparisons. For the “Affected” stations ( listed in Table), data above 40 hPa are not recommended for calculation of trends after the onset of "TCO drop.”

We would like to keep a running list of papers that use SHADOZ data. Please email a reference of your manuscript to the archiver: Debra.E.Kollonige@nasa.gov

Publications using SHADOZ data should include the following references:

• Witte, J.C., A. M. Thompson, H. G. J. Smit, M. Fujiwara, F. Posny, Gert J. R. Coetzee, ... F. R. da Silva (2017), First reprocessing of Southern Hemisphere ADditional OZonesondes (SHADOZ) profile records (1998-2015): 1. Methodology and evaluation, J. Geophys. Res. Atmos., 122, 6611-6636. https://doi.org/10.1002/2016JD026403.
• Thompson, A. M., J. C. Witte, C., Sterling, A., Jordan, B. J., Johnson, S. J. Oltmans, ... Thiongo, K. (2017). First reprocessing of Southern Hemisphere Additional Ozonesondes (SHADOZ) ozone profiles (1998-2016): 2. Comparisons with satellites and ground-based instruments. Journal of Geophysical Research: Atmospheres, 122, 13,000-13,025. https://doi.org/10.1002/2017JD027406..
• Witte, J. C., Thompson, A. M., Smit, H. G. J., Vömel, H., Posny, F., & Stübi, R. (2018). First reprocessing of Southern Hemisphere ADditional OZonesondes profile records: 3. Uncertainty in ozone profile and total column. Journal of Geophysical Research: Atmospheres, 123, 3243-3268. https://doi.org/10.1002/2017JD027791..
• Sterling, C. W., B. J. Johnson, S. J., Oltmans, H. G. J. Smit, A., Jordan, P. D., Cullis, E. G., Hall, A. M., Thompson, and J. C. Witte (2017). Homogenizing and Estimating the Uncertainty in NOAA's Long Term Vertical Ozone Profile Records Measured with the Electrochemical Concentration Cell Ozonesonde, Atmos. Meas. Tech. https://doi.org/10.5194/amt-2017-397.

Data Disclaimer and Guidelines:

The data on this website are subject to revision and reprocessing. Check dates of creation to download the most current version. Contact the co-investigators for questions concerning data techniques and quality.

Access to these data is free to the public. Whenever substantial use is made of their data, you accept that an offer of co-authorship will be made through personal contact. In all cases, an acknowledgement must be made to the data co-investigators and SHADOZ when these data are used in publication. Click here for a list of contact information on the SHADOZ station PI's

SHADOZ reserves the right to limit access to the Data Archive and to alter or change the layout and content of the website.