Upper Air Climatology of Amsterdam FIR, using ERA-Interim 1989-2008 Part 1.

This report, part 1, presents upper-air climatology below 150 hPa (Flight level 430) for the Flight
Information Region of the Netherlands (Amsterdam FIR). Climatology of the planetary boundary
layer below 850 hPa will (in more detail) be presented in part 2. The climatology is based on analysis
of twenty years ERA-interim 1989-2008 and on observations. ERA-Interim is a recent reanalysisproject
of the European Centre for Medium Range Weather Forecast ECMWF. The climatology
is produced under the program Kennis-voor-Klimaat-project Climatology and Climate scenarios for
Hotspot Mainport Schiphol, HSMS02 on request of Air Trac Control the Netherlands (LVNL).