SCIENTIA GEOGRAPHICA SINICA ›› 2015, Vol. 35 ›› Issue (1): 99-106.doi: 10.13249/j.cnki.sgs.2015.01.99

• Orginal Article • Previous Articles     Next Articles

Interannual Variability and Its Causes of Winter Temperature in Qinghai Region

Ji WANG1(), Hong-yan SHEN2, Ying-juan ZHANG1, Zhen-yu WANG2   

  1. 1.Beijing Regional Climate Center, Beijing 100089, China
    2.Qinghai Climate Center, Beijing 810001, China
  • Received:2013-08-25 Revised:2013-11-20 Online:2015-01-15 Published:2015-01-15


Interannual variation of temperature in winter over Qinghai and its mechanisms are analyzed using data(1961-2010) from 38 stations over the region as well as National Centers for Environmental Prediction(NCEP) reanalysis data. It unveiled that there exist two major temperature anomaly patterns in winter over Qinghai: unipole mode from north to south and dipole mode between east and west region. During cold winter a “+-+” wave train lay over mid-high latitude with a quasi-barotropic vertical structure. West Pacific index has the most prominent correlation with time coefficient of prime component 1, secondly, the Euro-Asian index and Pacific-North America index. Sea surface temperature anomalies (SSTA) over the south part of North Atlantic in winter may influence atmosphere circulations over Europe and Asian by setting off a Euro-Asian train. Besides, SSTA in both west wind drift and Kuroshio current region have a negative feedback to the East Asian winter monsoon. Also during an El Nino Modoki episode, moist warm air from low latitude transport northward no farther than East China, which make colder winter in Qinghai on account of strong westerly and boreal airflow.

Key words: Qinghai region, winter temperature, teleconnection, Interannual variation

CLC Number: 

  • P461