In Part Ⅰ,the climatological state of the ocean has been simulated by integrating a 6-layer,4°×5°grid global ocean model up to 100 years.In this part,the forcing in 1971—1973 is calculated by COADS,an...In Part Ⅰ,the climatological state of the ocean has been simulated by integrating a 6-layer,4°×5°grid global ocean model up to 100 years.In this part,the forcing in 1971—1973 is calculated by COADS,and using the integrated result of the 100th year as the initial state,we simulated the El Nino process in 1972—1973.The results are as follows: (1)We have reproduced the 1972—1973 El Nino process and its cooling process in the equatorial eastern Pacific. The simulated distribution of SST and the intensity of El Nino are similar to the observations. (2)The results show that there are two kinds of processes in El Nino formation:(i)the warming occurs in the equa- torial western Pacific,then propagates eastward to the central Pacific;(ii)the warm water forms near the coast of the South America and then,propagates westward along the equator.Observation indicates that the two processes were in- cluded in the El Nino in 1972.Our numerical experiment can simulate out both of them,although the first process is stronger than the second.In observation,the intensities of both processes are similar. (3)The El Nino process in 1972 can be simulated by running the model with the wind stress forcing,but its intensity is 1/2 the magnitude of observation.Only after adding the forcing of heat flux to run the model,its intensity can coin- cide with the observation.So the forcing effect of heat flux should not be ignored in the formation of El Nino,especially in the study of El Nino intensity.展开更多
A 6-layer,4°×5° horizontal resolution global ocean model has been designed and improved.After a 100-year in- tegration,an equilibrium state has been reached from the upper to lower layers.By taking the ...A 6-layer,4°×5° horizontal resolution global ocean model has been designed and improved.After a 100-year in- tegration,an equilibrium state has been reached from the upper to lower layers.By taking the mean state of last l0 mod- el years as climatic state,we analyzed the characteristics of the seasonal variation in our model integration.The results show that the simulated seasonal variation is similar to the observed.So the design of our model is successful.Then,us- ing the simulated climatic state of the seasonal variation as the initial state,and the observed stress and thermal state as the atmospheric forcing,we simulated the process of El Nino in 1972—1973 successfully.The simulated results of sea- sonal variation using our model will be presented in part I.展开更多
基金The work is sponsored by China Meteorological Administration under the monsoon foundationthe National Natural Science Foundation of China under the program No.49375245.
文摘In Part Ⅰ,the climatological state of the ocean has been simulated by integrating a 6-layer,4°×5°grid global ocean model up to 100 years.In this part,the forcing in 1971—1973 is calculated by COADS,and using the integrated result of the 100th year as the initial state,we simulated the El Nino process in 1972—1973.The results are as follows: (1)We have reproduced the 1972—1973 El Nino process and its cooling process in the equatorial eastern Pacific. The simulated distribution of SST and the intensity of El Nino are similar to the observations. (2)The results show that there are two kinds of processes in El Nino formation:(i)the warming occurs in the equa- torial western Pacific,then propagates eastward to the central Pacific;(ii)the warm water forms near the coast of the South America and then,propagates westward along the equator.Observation indicates that the two processes were in- cluded in the El Nino in 1972.Our numerical experiment can simulate out both of them,although the first process is stronger than the second.In observation,the intensities of both processes are similar. (3)The El Nino process in 1972 can be simulated by running the model with the wind stress forcing,but its intensity is 1/2 the magnitude of observation.Only after adding the forcing of heat flux to run the model,its intensity can coin- cide with the observation.So the forcing effect of heat flux should not be ignored in the formation of El Nino,especially in the study of El Nino intensity.
基金The work was sponsored by China Meteorological Administration under the monsoon foundation the National Natural Science fouadation of China under the program of No.49375245.
文摘A 6-layer,4°×5° horizontal resolution global ocean model has been designed and improved.After a 100-year in- tegration,an equilibrium state has been reached from the upper to lower layers.By taking the mean state of last l0 mod- el years as climatic state,we analyzed the characteristics of the seasonal variation in our model integration.The results show that the simulated seasonal variation is similar to the observed.So the design of our model is successful.Then,us- ing the simulated climatic state of the seasonal variation as the initial state,and the observed stress and thermal state as the atmospheric forcing,we simulated the process of El Nino in 1972—1973 successfully.The simulated results of sea- sonal variation using our model will be presented in part I.
