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近500年ENSO时间序列的建立与分析 被引量:10
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作者 王绍武 朱锦红 +1 位作者 蔡静宁 闻新宇 《自然科学进展》 北大核心 2004年第4期424-430,共7页
根据1861~2000年的年平均(3月至次年2月)Nino 3.4区SST及ENSO综合指数△I把ENSO分为7级.暖事件(E)分3级即3,2和1,大约相当SST距平1.5℃,1.0℃及0.5℃.冷事件(A)也分3级,-3,-2和-1,对应的SST距平大体如E,绝对值稍小.正常年为0级.然后利... 根据1861~2000年的年平均(3月至次年2月)Nino 3.4区SST及ENSO综合指数△I把ENSO分为7级.暖事件(E)分3级即3,2和1,大约相当SST距平1.5℃,1.0℃及0.5℃.冷事件(A)也分3级,-3,-2和-1,对应的SST距平大体如E,绝对值稍小.正常年为0级.然后利用与ENSO有密切关系的代用资料重建1501~2000年逐年的ENSO级.对1874~1973年100年根据观测的综合指数所划分的级与代用资料得到的结果比较.代用资料能反演出80%以上的E年及A年.这样建立的500年ENSO序列,显示出2年多、3年多及5年多左右以及10年的EN-SO变率,说明包括小冰期及现代暖期内的近500年中ENSO变率仍相对稳定.在小冰期冷期A年频率稍高,气候变暖的20世纪则E年频率较高. 展开更多
关键词 enso时间序列 变率 诊断 1501~2000年 南方涛动 “厄尔尼诺”现象 “拉尼娜”现象
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Heat center of the western Pacific warm pool 被引量:4
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作者 HU Shijian Hu Dunxin 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2012年第1期169-176,共8页
A heat center (HC) of the western Pacific warm pool (WPWP) is defined, its variability is examined, and a possible mechanism is discussed. Analysis and calculation of a temperature dataset from 1945-2006 show that... A heat center (HC) of the western Pacific warm pool (WPWP) is defined, its variability is examined, and a possible mechanism is discussed. Analysis and calculation of a temperature dataset from 1945-2006 show that the mean position of the HC during this period was near 0.4°S/169.0°E, at 38.0 m depth. From a time series of the HC, remarkable seasonal variability was found, mainly in the meridional and vertical directions. Interannual variabilities were dominant in the zonal and vertical directions. In addition, semiannual variation in the HC depth was discovered. The longitude of the HC varies with ENSO events, and its latitude is weakly related to ENSO on time scales shorter than a decade. The variation of the HC longitude leads the Nifio-3 index by about 3-4 months, and its depth lags the index for approximately 3 months. It is concluded that the HC depth results from a combination of its longitudinal and latitudinal variations. Low-pass-filtered time series reveal that the HC has moved eastward since the mid 1980s. 展开更多
关键词 western Pacific warm pool heat center VARIABILITY
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