Met Office - Global Radiosonde Data (1997 - Present)

This dataset consists of radiosonde data from stations worldwide. Stations are categorised into 7 regions: Africa, Asia, South America, North and Central America, South-West Pacific, Europe, and Antarctica, respectively. A clickable world map is available to view worldwide radiosonde station lists. European radiosonde data for the period 1990 to June 1998 are also available. The data comprise vertical profiles of temperature, dew-point temperature, wind speed and wind direction at standard and significant pressure levels. The standard pressure levels are 1000, 925, 850, 700, 500, 400, 300, 250, 200, 150, 100, 70, 50, 30, 20 and 10 mb. Significant pressure levels are calculated according to the Met. Office criteria and constitute levels at which significant events occur in the profile for example turning points. The period of coverage is 17 December 1996 to present, updated weekly. Stations conduct ascents up to four times daily at the synoptic hours of 00, 06, 12, 18 GMT. [Summary Extracted from the BADC Home Page]