Comparison study on ECMWF and HALOE temperature data in the stratosphere
ECMWF和HALOE平流层温度资料对比

The ECMWF and HALOE data from 1991 to 2002 was used to research the stratospheric temperature profile and distribution of temperature difference square. Then the time trends of stratospheric temperature at some altitudes were interviewed through linear trend test. The results obtained show that there are obvious differences between ECMWF and HALOE data. In mid-low latitudes, the temperature profiles are very similar bellow 10 hPa and the temperature from HALOE data is higher than that from ECMWF data in the layer from 10 hPa to 2 hPa. At 1 hPa, there is little difference between them. In mid-high latitudes of both hemispheres, the temperature difference is relatively obvious. The temperature from HALOE data is higher than that from ECMWF data in the whole stratosphere. It can be also found that the temperature distribution difference increases with the altitude in the stratosphere. There is a little difference in mid-low latitudes and clear differences out of 50 degrees in both hemispheres. At 100 hPa, 50 hPa and 10 hPa in the mid-low stratosphere, the temperature trends from HALOE and ECMWF data are very similar, but the decreasing trend is more obvious from HALOE data. At 2 hPa in the upper stratosphere, the trend after 1996, the temperature trends are just opposite. Those results will provide some proofs to stratospheric temperature researches.