Using the intensity data of each northern subtropical high measured by monthly 500 hPa height charts for the recent 38 years (1954-1991), we calculate their correlations with the monthly sunspot number and monthly sol...Using the intensity data of each northern subtropical high measured by monthly 500 hPa height charts for the recent 38 years (1954-1991), we calculate their correlations with the monthly sunspot number and monthly solar radio flux at 10.7 cm wave length, respectively. Through strict test, we further confirm a series of high correlations. Next, using a method called the non-integer (year) wave, the significant response of each subtropical high's intensity to solar activity at its main period of 10.9-year length is found. Special attention is paid to that of the eastern Pacific high, the possible mechanism of such sensible response is also analysed.展开更多
The monthly observed average precipitation data of 160 meteorological stations in China from 1960 to 2007,had been reorganized by the China Meteorological Administration.By employing that precipitation data,NCEP/NCAR ...The monthly observed average precipitation data of 160 meteorological stations in China from 1960 to 2007,had been reorganized by the China Meteorological Administration.By employing that precipitation data,NCEP/NCAR reanalysis data and the index of intensity of western Pacific subtropical high,the seasonal variations of subtropical high and precipitation in eastern China during the past decades are discussed.The relationships between them also are discussed by correlation and composite analyses.The results show that the intensity of subtropical high,which has significantly strengthened in the recent 50 years,especially in spring,autumn and winter,has notable impact on the simultaneous rainfall in the eastern region of China for all seasons,especially in winter.展开更多
文摘Using the intensity data of each northern subtropical high measured by monthly 500 hPa height charts for the recent 38 years (1954-1991), we calculate their correlations with the monthly sunspot number and monthly solar radio flux at 10.7 cm wave length, respectively. Through strict test, we further confirm a series of high correlations. Next, using a method called the non-integer (year) wave, the significant response of each subtropical high's intensity to solar activity at its main period of 10.9-year length is found. Special attention is paid to that of the eastern Pacific high, the possible mechanism of such sensible response is also analysed.
基金Supported by Projects Funded by Scientific Research Special Fund for Public Welfare Industry (GYHY20076029)
文摘The monthly observed average precipitation data of 160 meteorological stations in China from 1960 to 2007,had been reorganized by the China Meteorological Administration.By employing that precipitation data,NCEP/NCAR reanalysis data and the index of intensity of western Pacific subtropical high,the seasonal variations of subtropical high and precipitation in eastern China during the past decades are discussed.The relationships between them also are discussed by correlation and composite analyses.The results show that the intensity of subtropical high,which has significantly strengthened in the recent 50 years,especially in spring,autumn and winter,has notable impact on the simultaneous rainfall in the eastern region of China for all seasons,especially in winter.
