-Using the COADS data set of sea surface temperature in the Equatorial Eastern Pacific, thirty one El Nino events and twenty four anti -El Nino events were identified for the period from 1854 to 1987. The results were...-Using the COADS data set of sea surface temperature in the Equatorial Eastern Pacific, thirty one El Nino events and twenty four anti -El Nino events were identified for the period from 1854 to 1987. The results were compared with those of the other authors. The El Nino events (or anti -El Nino events ) are classified into two groups according to the timing of occrrence of the events: one starts at the first half of a year, another begins at the second half of a year. Both 1982-1983 and 1986-1987 events fall into the second group, which are characterized by the eastward migration of the positive anomaly of the sea surface temperature and the significant increasing of the anomaly in September or October.展开更多
In this paper,by using spectral method,the monthly-and seasonal-scale atmospheric diabatic heat flow(ADHF) departure fields are diagnosed in the period of 1964—1985 with 6 El Nino years and 6 anti-El Nino years over ...In this paper,by using spectral method,the monthly-and seasonal-scale atmospheric diabatic heat flow(ADHF) departure fields are diagnosed in the period of 1964—1985 with 6 El Nino years and 6 anti-El Nino years over the Northern hemisphere(NH).The results show that El Nino phenomena have pronounced influence on the ADHF depar- ture fields.The response of atmosphere exhibits a preferred arrangement of organizing positive and negative departure centers at low,middle and high latitudes.In anti-El Nino years,the response has the same forms as in El Nino years, but departure centers are opposite in phase.Furthermore,ADHF departure shows low-frequency oscillation in El Nino years and anti-El Nino years.The center of difference in departure between El Nino and anti-El Nino years displays a bi-monthly oscillation. Finally,through air-sea correlation analysis,it is pointed out that the SST anomaly is the most important cause for ADHF anomaly.展开更多
文摘-Using the COADS data set of sea surface temperature in the Equatorial Eastern Pacific, thirty one El Nino events and twenty four anti -El Nino events were identified for the period from 1854 to 1987. The results were compared with those of the other authors. The El Nino events (or anti -El Nino events ) are classified into two groups according to the timing of occrrence of the events: one starts at the first half of a year, another begins at the second half of a year. Both 1982-1983 and 1986-1987 events fall into the second group, which are characterized by the eastward migration of the positive anomaly of the sea surface temperature and the significant increasing of the anomaly in September or October.
文摘In this paper,by using spectral method,the monthly-and seasonal-scale atmospheric diabatic heat flow(ADHF) departure fields are diagnosed in the period of 1964—1985 with 6 El Nino years and 6 anti-El Nino years over the Northern hemisphere(NH).The results show that El Nino phenomena have pronounced influence on the ADHF depar- ture fields.The response of atmosphere exhibits a preferred arrangement of organizing positive and negative departure centers at low,middle and high latitudes.In anti-El Nino years,the response has the same forms as in El Nino years, but departure centers are opposite in phase.Furthermore,ADHF departure shows low-frequency oscillation in El Nino years and anti-El Nino years.The center of difference in departure between El Nino and anti-El Nino years displays a bi-monthly oscillation. Finally,through air-sea correlation analysis,it is pointed out that the SST anomaly is the most important cause for ADHF anomaly.
