Dr. Marc Allaart
Royal Netherlands Meteorological Institute
M. Allaart (KNMI) – Brewer #189 beginning in 2007. Brewer #100 from 1994 to 2006. Data in the NDACC database begin in 1994. Intercompared with traveling standard in August 2012 and in September 2014.
M. Allaart (KNMI) – Database extends back to 1992 for ozone, temperature, and humidity.