It Is Suitable For The Application Research Of The Physical Diagnostic Quantity Of The Radiometer

At present,the mainly way obtained the temperature and humidity data through the air sounding,Although this way is the common method of detection internationally,this method is limited by space and time,the temperature and humidity data that obtained is lacked continuity of space and time,when the convective weather happened,The applicability of temperature and humidity data obtained from aira sounding is greatly reduced.because its happened so shortly and fastly.In metorology,the diagnostic is used in convective weather to have a prediction.Therefore,the temperature and humidity data obtained by the air sounding and the calculation of the convective parameters are often limited,cannot reflect the change of convective parameters in convective weather process continuously.Compared with the air sounding,the microwave radiometer is more useful in monitoring and forecasting the weather than it.In order to obtaian the physical diagnostics that adapt to the radiometer,Using the temperature and humidity data detected by radiometers are used to improve the original air sounding physical diagnosis,it is important used for the forecasting and application of convective weather processes.Using the air sounding data of temperature and humidity as a reference,has a comparison and analysis with the data of temperature and humidity that obtained by the radiometer.The data of radiometer is well matched with the data of air sounding as a whole,and has a high degree of consistency.The density of water vapor is also good as a whole,and the data of humidity is poor as a whole.The quality of the detection data in the non-flood season(September-December)is better than the flood season(June-August)as a whole.The detection effect of the temperature at the lower level is better than the upper level,especially below 2 km.The relative humidity is relatively inaccurate in the height of the cloud bottom and the height of the cloud top which means the higher gradient of the relative humidity.In different weather backgrounds,the correlation between the radiometer detection temperature and the air sounding on the sunny day is around 0.7.The accuracy of the temperature and humidity data of the radiometer that added with the cloud information can be improved through the comparison of the correlation coefficient and average deviation between the data of temperature and humidity that added and unadded the cloud information of the radiometer and the data of temperature and humidity data of the air sounding.Particularly in relative humidity,it has a significant increase in accuracy compared to the data of relative humidity without cloud information.Subsequently,the physical diagnosis was divided into four categories.The data of temperature and humidity of the microwave radiometer and the data of temperature and humidity of the air sounding were used to calculate the sounding formulas on the MICAPS system.The physical diagnosis that calculated by the sounding data was used as a reference.And has a comparison analysis with the physical diagnostics that calculated by the microwave radiometer data.The detection of radiometers at important stratification heights has a good effect as a whole.Except that the error in the EL layer is greater than 10%,the error in the remaining layers is small,it can be used directly in practical application.For the detection effect of energy and thunderstorm index,the detection error of CAPE value is about 10%,It can be used for continuous analysis in practical applications.The detection effect of CIN value is poor,it cannot be used directly.The radiometer verify the detection effect of the thermostatic stability index and the dynamic stability index,and it can be concluded that the relative error of the BI index is small,and the detection value is simillar with the air sounding,it can be used directly.Other indexes,such as K index,TT index,A index,etc,need to be corrected due to large errors and inability to determine their values.Then,using the availability of the data of the radiometer and the particularity of the radiometer products in fourth chapter,as well as the physical meaning of the physical diagnosis formulas,Correction the physical diagnosis that the error is larger.Correction the temperature and humidity of the humidity layer and the 850hPa layer that adapted to the data of the radiometer.Re-correct The temperature and humidity of the 850hPa layer and re-correct the corresponding parameters of the physical quantity formula The revised K-index,TT-index and A-index formulas can be applied in various regions in theory.Through the application of the thunderstorm weather in Kunming,the K-index value is greater than 0?when a thunderstorm occurs.when the K index is greater than20?,thunderstorms are likely to occur;when thunderstorms occur,the TT index values are all greater than 0?.When the TT index is greater than 20?,thunderstorms are likely to occur;when thunderstorms occur,The value of index A is greater than0?about 80%.Only a few thunderstorm days have a value of samller than 0?.When the A index is greater than 0?,thunderstorms are likely to occur.The corrected physical diagnostic formula is adapted to the data of the radiometer.The change of the calculated physical diagnostic value can reflect the process of convective weather better.Finally,in order to illustrate the role of the products of radiometers and the physical diagnostics that corrected in the analysis of weather,after analyzing multiple weather processes,the typical weather cases in Kunming were selected to carry out the evolution of the weather process.In sunny days,radiometer products can accurately reflect the characteristics of the meteorological elements in the sky;before the occurrence of heavy fog,there is a clear double inversion layer at the lower layer,and the humidity field is of large value;the integrated water vapor content is maintained at about 14Kg/m~2,The liquid water path swells before the occurrence of heavy fog and remains in a large value area,with a maximum of 400 Kg/m~2.When its value drops sharply,fog will appear half an hour later;in addition to the rainy weather,the Weather factors can be accurately reflected by the radiometer,and the revised A-index can reflect the occurrence of precipitation.The value of A-index increases upwards 1-2 hours before precipitation,and the value of A-index decreases after rainfall;During the thunderstorm,the value of the liquid water pathway and the integrated vapor content map increased,and the low cloud base height can also describe the water vapor distribution and evolution characteristics during thunderstorm process accurately.The CAPE of convective effective energy calculated from the temperature and humidity obtained by the radiometer indicates that the thunderstorm occurred approximately 30 minutes after the CAPE value jumped to the extreme.When the CAPE value decreases,the thunderstorm stops.Using the modified K-index,A-index,and TT-index analysis that suitable for the radiometer,it was found that before the occurrence of a thunderstorm,its value showed an upward trend and maintained a positive value.After the thunderstorm,its value showed a downward trend,and finally it was a negative value.It can effectively reflect the occurrence of thunderstorm process,reflecting that the revised physical diagnosis is applicable in Kunming.