| 东北地区夏季冷暖年大气环流异常的空间特征及演变 |
| |
| 引用本文： | 王静.东北地区夏季冷暖年大气环流异常的空间特征及演变[J].气象科学,2002,22(4):394-401. |
| |
| 作者姓名： | 王静 |
| |
| 作者单位： | 中国气象局华风气象影视信息集团,北京,100081 |
| |
| 摘 要： | 本文利用40年全球范围的温度场、高度场、UV风场资料，分析东北地区冷暖夏年的大气环流异常空间特征及长期演变，分析结果表明：东北低温冷害是一种时空尺度都很大的灾害性天气气候现象，冷夏年500hPa盛行经向环流。高纬有阻高或暖脊维持，西太平洋副高偏弱，温度场、高度场的垂直分布为伸展至对流层顶的正压结构，纬向呈一波型异常结构，有超长波槽稳定维持于东北地区，冷夏前期，大陆冷高压偏弱，冷空气活跃，冰岛低压和阿留申低压发展较深，太平洋副高持续偏弱，这种状态可以持续到夏季，便形成了东北地区的冷夏。
|
| 关 键 词： | 东北地区 夏季 冷暖年 大气环流异常 空间特征 低温冷害 |
| 修稿时间： | 2001年4月27日 |
GLOBAL CIRCULATION ANOMALOUS SPATIALCHARACTER OF COLD/WARM YEARS INSUMMER IN EASTNORTHERN CHINAAND LONG-PERIOD VARIATION |
| |
| Wang Jing.GLOBAL CIRCULATION ANOMALOUS SPATIALCHARACTER OF COLD/WARM YEARS INSUMMER IN EASTNORTHERN CHINAAND LONG-PERIOD VARIATION[J].Scientia Meteorologica Sinica,2002,22(4):394-401. |
| |
| Authors: | Wang Jing |
| |
| Abstract: | By using of temperature,height,UV wind field datasets for global 40 years, global circulation anomalous spatial feature of cold/warm years in summer in east-northern China and its long-period variation is analysed. Conclusion shows that low temperature cool injury is a kind of synoptic climatic characteristics, in cold summer years radial circulation prevails in 500hPa geo-potential height, there is blocking high or warm ridge in high-latitude, west Pacific sub-high is weaker,vertical distribution of temperature and height field extends to tropopause,there is an anomalous one-wave structure in zonal direction. In pre-cold summer,continual cold high is weaker,cold air is active,Icelandic low and Aleutian low develop more heavier,Pacific sub-high continues weaker,which can sustain to summer,so that this case leads to cold summer in east-north of China. |
| |
| Keywords: | Low temperature Cold/warm summer years Anomalous global circulation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《气象科学》浏览原始摘要信息 |
| 点击此处可从《气象科学》下载免费的PDF全文 |
|
