四个耦合模式ENSO后报试验的“春季预报障碍”

被引:8
作者
张雅乐 [1 ,2 ]
俞永强 [2 ]
段晚锁 [2 ]
机构
[1] 中国气象局气象干部培训学院
[2] 中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室
关键词
ENSO事件回报试验; 春季可预报性障碍; 预报误差; 海-气相互作用;
D O I
暂无
中图分类号
P732.4 [海洋天气预报];
学科分类号
摘要
用CliPAS计划中3个气候模式和中国科学院大气物理研究所耦合模式FGOALS-g短期气候异常回报试验结果,将动力和统计方法相结合,考察了1982—2003年厄尔尼诺/拉尼娜事件发展期和衰减期海表温度春季可预报性障碍现象。结果表明,所考察的耦合模式对ENSO事件预报的误差发展存在明显的季节依赖性,最大误差增长通常发生在春季,发生显著的可预报性障碍现象。进一步分析发现厄尔尼诺事件和拉尼娜事件在发展期的季节预报障碍现象比衰减期明显,以厄尔尼诺事件发展期春季可预报性障碍现象最为显著,拉尼娜事件衰减期季节预报障碍现象不显著。研究还发现,预报误差的增长在ENSO事件冷暖位相具有显著的非对称性,发展期暖位相预报误差强于冷位相,而衰减期冷位相的预报误差比暖位相大。通过回归分析,诊断了海-气相互作用的强度,发现耦合系统在春季最不稳定,使预报误差最易在春季发展,从而导致可预报性障碍。
引用
收藏
页码:506 / 519
页数:14
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