Abstract:Based on summer rainfall over 4 stations for 1951~1960 and 36 stations for 1951~1999 in Zhejiang Province,flood and drought years are classified.The simultaneous and precursory features of circulation for flood and drought years are studied.

Abstract:Observations are made on several precipitation processes in Harbin,with the aid of GBPP 100 ground raindrops spectrometer made in USA.According to the radar data and synoptic observations,the paper divides precipitation cloud into three kinds:status, stratocumulus and cumulus,analyzes the micro physical structures of three kinds of precipitations,with focus on the distribution characteristics of raindrops spectrum. M-P and Γ distributions are also used to fit the diameter of raindrops.

Abstract:Based on summer rain patterns of east China during 1900~1998,North Hemisphere SLP and SST anomaly fields for every rain patterns are studied by the use of statistic method.The results show that the distribution features of different rain patterns are different,especially,and there are some strong signals of distinguishing rain patterns.

Abstract:In this paper,the following inequalities for the eigenvalues and singular values of the product of matrices are obtained.

Abstract:The apparent temperature model is built based on the thermal equilibrium equation,combining with the character of metabolism in different aged people.Through comparing with the comfort model used widely currently,the apparent temperature model on the basis of thermal equilibrium is proved to be more universal.At the same time effects of wind,humidity and radiation on apparent temperature are analyzed.These results will provide theoretical basis for developing comfort service and setting up system of city environment service.

Abstract:In the context of turbulent observations in Changshu over the Yangtze delta from May to September in 1999, research is done for daily changes of sensible, latent heat and momentum flux, turbulence intensity and spectral pattern. Results suggest that various flux daily patterns are the same as ordinary ones: latent heat flux is dominant during daytime with much smaller sensible heat flux than latent one, and moreover, daily turbulence variation has close relationship with a weather condition in such a way that it is much stronger in sunny than cloudy sky. Evidence from analyzing turbulence intensity and spectral pattern indicate that turbulence intensity in three directions approaches to that over a typical flat underlying surface in Changshu at near neutral stratification ; for other cases, the relationship between normalized standard deviation and stability is in conformity with power 1/3 in vertical direction but not so good in horizontal direction, particularly in stable stratification data dots disperse greatly; spectral patterns correspond to power -2/3 in high frequency for wind speed of three directions; peak frequency of speed spectral pattern is in correspondence with that of typical flat underlay surface in horizontal and vertical direction.Total transportation coefficients C D and C H have tight relationship with stability:C_D, C_H will decrease with increasement of stability.

Abstract:The sensitivity experiments (STE) of numerical simulation,in which the radar and/or satellite data were incorporated into the PSU/NCAR mesoscale model to modify the initial moisture field,for two kinds of heavy rainfall processes over the Changjiang Huaihe river basin have been performed and compared with the control experiment (CTE) without using radar and satellite data.The results show that there is a great improvement in the simulation for 24 hour precipitation forecasts through the adjustment of water vapour and ascending motion by incorporating of radar and satellite data into the mesoscale model.The area and amount of rainfall obtained by STE are more in agreement with the obtained fact than those from CTE.The impact of radar and/or satellite data on simulation result is different for different types of rainfall process.

Abstract:The water vapor image before the vortex formation was analysed,and by the numerical simulation of the vortex using η model, water vapor effects on rain and synoptic system have been investigated.Results are as follows:(1)the Indian Ocean and Arabian Sea are important water vapor sources in the middle and upper troposphere for the forming of the vortex over the Plateau.(2)There are favourable conditions in height and temperature fields for the vortex forming over the Plateau if the water vapor increases in the middle and upper troposphere over the west of India and Arabian Sea. (3)The numerical forecasting will be improved,by changing water vapor condition in the middle and upper troposphere in the south of the Plateau and Arabian Sea based on water vapor image.

Abstract:4-(6-methoxyl 8 quinolineazo) resorcinol (abbr.MQAR),an organic reagent,has been synthesized by coupled reaction of diazotized 6 methoxyl 8 aminoquinoline with resorcinol, and purified with N,N dimethyl formamide recrystallization method. Analysis and characterization of synthesized product using thin layer chromatography (TLC), elementary analysis (EA), UV VIS absorption spectrometry, infra red absorption spectrometry (IR) and nuclear magnetic resonance (NMR) etc. indicate that the synthesized product to be pure MQAR with melting point of 194×.

Abstract:CMCM-98 Contest Question A has given rise to much controversy.For example,is risk profit curve a broken line?If so,how many sections should it be divided into?Is it proper to use the maximum profit risk model?What’s the correct answer to preference coefficient model?This thesis is meant to find out an all inclusive solution to CMCM-98 Contest Question A and disscuss the above questions in detail.

Abstract:Composite analysis is used to analyze distinction of rainfall in summer (Jun. to Aug.) over the Tibetan Plateau during ENSO period.It is found that rainfall in mid western Plateau exhibits obviously different during El Nino and La Nina events.Coagulation spectrum and singular value decomposition(SVD) are used to investigate the relationship between the Plateau summer rainfall and Pacific SSTA.Generally, there is below(above) normal summer precipitation in this region on the phase of El Nino (La Nina).

Abstract:Morlet wavelet transform of precipitation in Hetao area during April to May shows that there exist three obvious periods:7 ,24 and 3 year.The 7 year period is the strongest. Precipitation tendency of April May in this area is expected to be negative anomaly in 2000~2003,and obvious drought in 2000,and obviously positive anomaly in 2004(or 2005) by using Morlet wavelet analysis and Periodogram method.

Abstract:Based on the EOF analysis of winter average temperature of eleven stations in Jiangsu Province from 1961 to 1998,the winter temperature anomaly variation feature is analysed,and further,the 500hPa height departure,SSTA in the same and preceding months are analysed.Results show that in cold winters,blocking grows in Asia Pacific region both in winter and in the preceding months with meridional currents enhanced,and SSTA being negative in eastern equatorial Pacific in the preceding 6 months.While the 500hPa height anomaly of warm winters bears the characteristics of strong western Pacific subtropical high, zonal flow prevailing in mid and high latitude in Asia Europe continent. The tropical eastern Pacific SST takes on the El Nino features,with SSTA in the preceding months transitting from negative to positive.

Abstract:In Yellow River "96.8"flood is formed by an heavy rainfall process. Because the terrain is complicated and the rainfall is varied in time in Yellow River basin,it is difficult to forecast. In this paper, a simulated forecast is done for the flood with LASG REM model and the rainfall process is analyzed with the output of the model.It is shown that the model has strong capacity for forecasting the heavy rain and is suitable for hydrometeorological forecast.

Abstract:The progress of studies on inter decadal climate variability of the Pacific atmosphere ocean system is reviewed,a brief introduction is given to inter decadal variability of atmospheric circulation, oceanic state and their interaction,as well as main mechanisms of inter decadal variability of the Pacific atmosphere ocean system.Finally the major problem and the prospect of the study are discussed.