从近几年美国气候预测中心(Climate Prediction Center)发布的气 候预测公报中看到, 典型相关和最优气候均态(Optimal Climate Normal,OCN)是美 国制作短期气候预测的两种常用统计方法.
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国家海洋和大气管理局气候预测中心说这一走势应该会在一两周后开始减弱。
The Climate Prediction Center of the National Oceanic and Atmospheric Administration says the pattern should begin to weaken in a week or two.
美国气候预测中心于上周四称，“拉尼娜”气候现象将持续至2009年春季，但在此期间其影响将逐渐减弱。
The La Nina weather anomaly will persist into the spring of 2009 but should gradually weaken during that period, the U.S. Climate Prediction Center said on Thursday.
美国气候预测中心副主任麦克克哈尔佩特说，拉尼娜“很有可能使美国南部的旱灾在今年冬天延续或扩大。”
La Nina "is likely to contribute to persisting or developing drought across much of the southern US this winter, " said Mike Halpert, deputy director of the Climate Prediction Center.
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