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Ann. Geophys., 24, 2445-2449, 2006
www.ann-geophys.net/24/2445/2006/
© European Geosciences Union 2006
Impact of missing sounding reports on mandatory levels and tropopause statistics: a case study
J. C. Antuña1, J. A. Añel2, and L. Gimeno2,3
1Estación Lídar, Centro Meteorológico de Camagüey, Cuba
2Departamento de Física Aplicada, Universidad de Vigo, Ourense, Spain
3University of Lisbon, CGUL, IDL, Lisbon, Portugal
Abstract. This paper describes the effect of missing sounding reports on temperature
and pressure mean values for mandatory levels using the aerological
information from the Camagüey Meteorological Centre. Also it is
described the effect of missing data on mean temperature and pressure values
at the multiple tropopause levels. The case study belongs to one station for
a time lag of eight years. Up to the present these types of studies have
been conducted using simulated datasets. The present one uses a real
inhomogeneous radiosonde dataset. The main reason for missing reports were
transmission problems and possible encoding-decoding difficulties. It has
been found that profiles of the mean temperature and altitude show little
differences between the complete and incomplete datasets. Moreover, no
statistical significant differences were found for the mean values of the
variables for the complete and incomplete datasets. The most probable reason
for those results is that the cause of the missing reports has a random
behaviour. Finally we have found that the only two effects noticed on the
statistics were slightly higher values of the mean temperatures in the
complete dataset and the decrease in the percent of multiple tropopause
reports for the incomplete dataset.
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