| The Dynamics of ENSO Anomaly as Revealed in Ensemble Climate Simulations-Impact of Mean Stationary Wave |
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| 作者姓名： | X.L. Wang H.L. Rui A. Leetmaa |
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| 作者单位： | Climate Prediction Center NCEP/NWS/NOAA，Washington，D.C.20233，Environmental Modeling Center，NCEP/NWS/NOAA，Washington，D.C. 20233，NCEP，/NWS/NOAA，Washington，D.C.20233 |
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| 摘 要： | A series of climate ensemble experiments using the climate model from National Centers for Environmental Prediction (NCEP) were performed to exam impact of sea surface temperature (SST) on dynamics of El-Nino/South-crn Oscillation (ENSO).A specific question addressed in this paper is how important the mean stationary wave influences anomalous Rossby wave trains or teleconnection patterns as often observed during ENSO events.Evidences from those ensemble simulations argue that ENSO anomalies,especially over Pacific-North America (PNA) region,appear to be a result of modification for climatological mean stationary wave forced by persistent tropical SST anomalies Therefore,the role of SST forcing in maintaining climate basic state is emphasized.In this argument,the interaction between atmospheric internal dynamics and external forcing,such as SST is a key element to understand and ultimately predict ENSO.
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The Dynamics of ENSO Anomaly as Revealed in Ensemble Climate Simulations-Impact of Mean Stationary Wave |
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| X.L. Wang,H.L. Rui,A. Leetmaa.The Dynamics of ENSO Anomaly as Revealed in Ensemble Climate Simulations-Impact of Mean Stationary Wave[J].Advances in Atmospheric Sciences,1996,13(4):425-444. |
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| Authors: | XL Wang HL Rui A Leetmaa |
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| Institution: | Climate Prediction Center NCEP / NWS /NOAA, Washington, D.C. 20233,Environmental Modeling Center, NCEP / NWS / NOAA, Washington, D.C. 20233,NCEP / NWS / NOAA, Washington, D.C.20233 |
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| Abstract: | A series of climate ensemble experiments using the climate model from National Centers for Environmental Prediction (NCEP) were performed to exam impact of sea surface temperature (SST) on dynamics of El-Nino / Southern Oscillation (ENSO). A specific question addressed in this paper is how important the mean stationary wave influences anomalous Rossby wave trains or teleconnection patterns as often observed during ENSO events. Evidences from those ensemble simulations argue that ENSO anomalies, especially over Pacific-North America (PNA) region, appear to be a result of modification for climatological mean stationary wave forced by persistent tropical SST anomalies. Therefore, the role of SST forcing in maintaining climate basic state is emphasized. In this argument, the interaction between atmospheric internal dynamics and external forcing, such as SST is a key element to understand and ultimately predict ENSO. |
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| Keywords: | ENSO Dynamics Mean Standing Wave Tropical-Extratropical Interaction |
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