Error Analysis about Meteorological Elements of ECMWF at Urumqi Airport
The meteorological elements from ECMWF are evaluated by comparing with observational data in the Urumqi Airport.The results show that:1)the 2 m air temperature of ECMWF is generally 0.5-1.6℃ lower than the observation,and the 10 m wind speed predicted by ECMWF is generally larger than the observation,and the errors increase significantly with the increase of wind speed,with the maximum average deviation exceeding 5 m/s.2)The errors of 2 m air temperature and 10 m wind speed of ECMWF have obvious diurnal variation characteristics,i.e.,they are smaller in the day than at night.In addition,10 m wind speed of ECMWF has certain annual variation characteristics with the minimum deviation in summer and the maximum deviation in winter.3)The corrected sea level pressure of ECMWF shows negative deviation during the day and positive deviation at night,and is 1-3 hPa lower than the observation during April to September,and 2-4 hPa higher than the observation during November to February.4)For the forecast of 2 m air temperature and 10 m wind speed,in general,EC_20 is better than EC_08.
EC fine mesherror analysis2 m air temperature10 m wind speedcorrected sea level pressure(QNH)
NETL
NSTL
万方数据
