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| Sea surface temperature east of Australia： A predictor of tropical cyclone frequency over the western North Pacific？ | |
| 作者姓名： | ZHOU BoTao CUI Xuan |
| 作者单位： | [1]National Climate Center, China Meteorological Administration, Beijing 100081, China; [2]Nansen-Zhu International Research Center, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; [3]National Meteorological Center, China Meteorological Administration, Beijing 100081, China |
| 基金项目： | This work was supported by the National Natural Science Foundation of China (40805029), the National Basic Research Program of China (2009CB421407) and the Knowledge Innovation Program of the Chinese Academy of Sciences (IAP09302). |
| 摘 要： | The relationship between sea surface temperature (SST) east of Australia and tropical cyclone frequency over the western North Pacific (WNPTCF) is analyzed by use of observation data.The WNPTCF from June to October is correlated negatively to spring SST east of Australia.When the spring SST is in the positive phase,a cyclonic circulation anomaly in the upper troposphere and an anticyclonic circulation anomaly in the lower troposphere prevail over the western North Pacific from June to October,concurrent with an anomalous atmospheric subsidence and an enlarged vertical zonal wind shear.These conditions are unfavorable for tropical cyclone genesis,and thus WNPTCF decreases.The negative phase of the spring SST east of Australia leads to more tropical cyclones over the western North Pacific.The spring SST east of Australia may give rise to simultaneous change in tropical atmospheric circulation via the teleconnection wave train,and then subsequently affect atmospheric circulation variation over the western North Pacific. |
| 关 键 词： | western North Pacific tropical cyclone frequency sea surface temperature atmospheric circulation teleconnection |
| 收稿时间： | 2010-07-05 |
| 修稿时间： | 2010-08-16 |
Sea surface temperature east of Australia: A predictor of tropical cyclone frequency over the western North Pacific? |
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| ZHOU BoTao,CUI Xuan.Sea surface temperature east of Australia: A predictor of tropical cyclone frequency over the western North Pacific?[J].Chinese Science Bulletin,2011,56(2):196-201. | |
| Authors: | Zhou BoTao Cui Xuan |
| Institution: | 1. National Climate Center, China Meteorological Administration, Beijing 100081, China; 2. Nansen-Zhu International Research Center, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; 3. National Meteorological Center, China Meteorological Administration, Beijing 100081, China |
| Abstract: | The relationship between sea surface temperature (SST) east of Australia and tropical cyclone frequency over the western North Pacific (WNPTCF) is analyzed by use of observation data. The WNPTCF from June to October is correlated negatively to spring SST east of Australia. When the spring SST is in the positive phase, a cyclonic circulation anomaly in the upper troposphere and an anticyclonic circulation anomaly in the lower troposphere prevail over the western North Pacific from June to October, concurrent with an anomalous atmospheric subsidence and an enlarged vertical zonal wind shear. These conditions are unfavorable for tropical cyclone genesis, and thus WNPTCF decreases. The negative phase of the spring SST east of Australia leads to more tropical cyclones over the western North Pacific. The spring SST east of Australia may give rise to simultaneous change in tropical atmospheric circulation via the teleconnection wave train, and then subsequently affect atmospheric circulation variation over the western North Pacific. |
| Keywords: | western North Pacific tropical cyclone frequency sea surface temperature atmospheric circulation teleconnection |
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