首页 | 官方网站   微博 | 高级检索  
     

北半球海冰强迫作用下大气可预报性研究
引用本文:王嘉,郭裕福.北半球海冰强迫作用下大气可预报性研究[J].应用气象学报,2004,15(3):291-300.
作者姓名:王嘉  郭裕福
作者单位:中国科学院大气物理研究所LASG, 北京 100029
基金项目:国家重点基础研究发展规划项目 (G1 9980 40 90 3 ),中国科学院知识创新工程重要方向项目 (ZKCX2 SW 2 1 0 ),国家自然科学基金项目 ( 4 0 1 3 5 0 2 0 )资助
摘    要:使用LASG/IAP GOALS耦合模式中的全球大气环流模式分量AGCMR15L9的计算结果,在其他外强迫维持气候值不变的情况下,用方差分析的方法,以外部方差与总方差之比Re作为衡量标准,考察该模式关于海冰的季节和跨季节潜在可预报性的大小。结果发现,从总体上看,北半球海冰变化所造成的潜在可预报性较小,只有在大气低层的一些气候要素,如温度、湿度的结果中,才存在Re>0.5的现象。潜在可预报性结果的局地特征比较明显,高值往往发生在海冰年际变率大的区域里。与中低纬海温在中高纬地区的影响相比,不排除海冰的作用更大的可能性。另外,如果分区域看,北半球某些区域的海冰,在若干挑选出的其区域海冰面积发生大异常年份中的潜在可预报性可能会比不做挑选的总体结果要大。这说明北半球某些区域海冰在面积发生较大异常的时候,可能对同期或(及)后期环流有着比较重要的影响。

关 键 词:北半球海冰    潜在可预报性    区域海冰
收稿时间:2003-04-01
修稿时间:2003年4月1日

Assessing Potential Predictability Associated with Boreal Sea Ice with an AGCM
Wang Jia,Guo Yufu.Assessing Potential Predictability Associated with Boreal Sea Ice with an AGCM[J].Quarterly Journal of Applied Meteorology,2004,15(3):291-300.
Authors:Wang Jia  Guo Yufu
Affiliation:LAS G, Instit ute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029
Abstract:The potential predictability associated alone with boreal sea ice on the seasonal to intraannual scale is studied with AGCMR15L9, the atmospheric component of LASG/IAP GOALS. With the aid of the analysis variance, it is found that the predictability index, expressed as a ratio of the external variance to the total, is weak in most regions. But as far as some low level, say 1000 hPa, variables are concerned, such as the atmospheric temperature and relative humidity, stronger predictability larger than 0.5 can be found in some regions where the interannual sea ice variability is great. Compared with sea surface temperature (SST) in the lower latitude, the boreal sea ice may have an equivalent or even stronger impact on the mid-high latitude atmospheric circulation. In addition, in some regions where the local sea ice variance is great, a greater predictability in the years of large sea ice area anomalies can be achieved than the results of the total 31 years. It means that large sea ice anomalies in some specific regions may lead to great anomalies in the corresponding atmospheric circulation.
Keywords:Boreal sea ice  Potential predictability  Local sea ice
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《应用气象学报》浏览原始摘要信息
点击此处可从《应用气象学报》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号