TY  - JOUR
AU  - Stauffer, Ryan M.
AU  - Thompson, Anne M.
AU  - Kollonige, Debra E.
AU  - Witte, Jacquelyn C.
AU  - Tarasick, David W.
AU  - Davies, Jonathan
AU  - Vömel, Holger
AU  - Morris, Gary A.
AU  - Van Malderen, Roeland
AU  - Johnson, Bryan J.
AU  - Querel, Richard R.
AU  - Selkirk, Henry B.
AU  - Stübi, Rene
AU  - Smit, Herman G. J.
TI  - A Post‐2013 Dropoff in Total Ozone at a Third of Global Ozonesonde Stations: Electrochemical Concentration Cell Instrument Artifacts?
JO  - Geophysical research letters
VL  - 47
IS  - 11
SN  - 1944-8007
CY  - Hoboken, NJ
PB  - Wiley
M1  - FZJ-2021-00820
SP  - e2019GL086791
PY  - 2020
AB  - An international effort to improve ozonesonde data quality and to reevaluate historical records has made significant improvements in the accuracy of global network data. However, between 2014 and 2016, ozonesonde total column ozone (TCO; O3) at 14 of 37 regularly reporting stations exhibited a sudden dropoff relative to satellite measurements. The ozonesonde TCO drop is 3–7% compared to satellite and ground‐based TCO, and 5–10% or more compared to satellite stratospheric O3 profiles, compromising the use of recent data for trends, although they remain reliable for other uses. Hardware changes in the ozonesonde instrument are likely a major factor in the O3 dropoff, but no single property of the ozonesonde explains the findings. The bias remains in recent data. Research to understand the dropoff is in progress; this letter is intended as a caution to users of the data. Our findings underscore the importance of regular ozonesonde data evaluation.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000543387400063
DO  - DOI:10.1029/2019GL086791
UR  - https://juser.fz-juelich.de/record/890233
ER  -