1. Stationary anomalies in stratospheric meteorological data sets;Bowman;Geophys. Res. Lett.,1998
2. The NCEP/NCAR 40-year reanalysis project;Kalnay;Bull. Am. Met. Soc.,1996
3. Trajectory mapping: A tool for validation of trace gas observations;Morris;J. Geophys. Res.,2000
4. Ivanov , A. A. Kats S. Kurnosenko N. Nash Z. Zaitseva Instruments and Observing Methods Report No. 40: WMO International Radiosonde Comparison Phase III Secretariat of the World Meteorological Organization Geneva, Switzerland 1991
5. World Meteorological Organization Manual on Codes Volume 1 Part A:Alphanumeric Codes WMO No. 306., Supplement No. 7A Secretariat of the World Meteorological Organization Geneva, Switzerland 1994