欧亚春季雪盖对印度洋偶极子的影响

doi:10.13249/j.cnki.sgs.2006.06.682

地理科学 ›› 2006, Vol. 26 ›› Issue (6): 682-687.doi: 10.13249/j.cnki.sgs.2006.06.682

欧亚春季雪盖对印度洋偶极子的影响

庞洪喜¹, 何元庆^1,2, 卢爱刚¹, 赵井东¹, 宁宝英¹, 院玲玲¹, 宋波¹

1. 中国科学院寒区旱区环境与工程研究所冰冻圈与环境联合重点实验室, 甘肃兰州 730000;
2. 中国科学院青藏高原研究所, 北京 100029

收稿日期:2005-08-23 修回日期:2005-12-29 出版日期:2006-11-20 发布日期:2006-11-20
基金资助:
国家自然科学基金资助项目(40501014、90511007)、中国科学院创新团队国家合作伙伴计划(CXTD-Z2005-2)、中国科学院特殊学科人才培养基金项目(J0130084)资助。

Influence of Eurasian Snow Cover in Spring on Indian Ocean Dipole

PANG Hong-Xi¹, HE Yuan-Qing^1,2, ZHAO Jing-Dong¹, NING Bao-Ying¹, YUAN Ling-Ling¹, SONG Bo¹

1. Key Laboratory of Cryosphere and Environment, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000;
2. Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100029

Received:2005-08-23 Revised:2005-12-29 Online:2006-11-20 Published:2006-11-20

摘要/Abstract

摘要： 文章研究了欧亚春季雪盖对印度洋偶极子的影响。研究发现,欧亚春季雪盖与印度洋偶极子关系密切,两者之间存在显著的反相关关系。欧亚春季雪盖异常导致夏季赤道印度洋垂直纬向环流以及印度洋和欧亚大陆之间的垂直经向环流发生异常,是欧亚春季雪盖与印度洋偶极子存在反相关关系的主要原因。欧亚春季雪盖异常可能是印度洋偶极子发生的一个重要的外在诱发因子。

Abstract: The influence of Eurasian snow cover in spring on Indian Ocean Dipole (IOD) was first studied in this paper. The results indicate that IOD is significantly correlated negatively with Eurasian snow cover extent in spring. The anomalies of Eurasian snow cover in spring bring about the anomalies of the vertical zonal circulation over the equatorial Indian Ocean and the vertical meridional circulation between the Indian Ocean and Eurasian continent in summer. The anomalies of the vertical zonal and meridional circulations play an important role in occurrence of the Indian Ocean Dipole and its maintaining, leading a significantly negative correlation between the Eurasian snow cover in spring and the Indian Ocean Dipole. It is presumable that the Eurasian snow cover in spring as one of the causal factors could trigger IOD events. The results in the paper are important for us to further investigate the links between snow cover, atmosphere circulation and sea temperature and the possible mechanisms between them.

中图分类号:

P461+.6

庞洪喜, 何元庆, 卢爱刚, 赵井东, 宁宝英, 院玲玲, 宋波. 欧亚春季雪盖对印度洋偶极子的影响[J]. 地理科学, 2006, 26(6): 682-687.

PANG Hong-Xi, HE Yuan-Qing, ZHAO Jing-Dong, NING Bao-Ying, YUAN Ling-Ling, SONG Bo. Influence of Eurasian Snow Cover in Spring on Indian Ocean Dipole[J]. SCIENTIA GEOGRAPHICA SINICA, 2006, 26(6): 682-687.

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欧亚春季雪盖对印度洋偶极子的影响

Influence of Eurasian Snow Cover in Spring on Indian Ocean Dipole

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