JOURNAL OF NATURAL RESOURCES ›› 2018, Vol. 33 ›› Issue (1): 114-126.doi: 10.11849/zrzyxb.20161067

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Variation of Springtime Northern Branch Ridge and Its Impact on Climate in China

ZHANG Yong-li1, 2, 3, 4, FAN Guang-zhou3, *, WANG Jia-nan3, WU Yu5, WANG Xiao6, HUANG Xian-lun7, GE Fei3, LONG Yan-yan8   

  1. 1. Northwest Institute of Eco-Environment and Resources, CAS, Lanzhou 730000, China;
    2. College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China;
    3. College of Atmospheric Sciences, Chengdu University of Information Technology/Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu 610225, China;
    4. University of Chinese Academy of Sciences, Beijing 100049, China;
    5. Hainan Meteorological Observatory, Haikou 570203, China;
    6. Henan Service Center of Meteorological, Zhengzhou 450003, China;
    7. Yangjiang Meteorological Bureau, Yangjiang 529500, China;
    8. Civil Aviation Flight University of China, Guanghan 618307, China
  • Received:2016-10-08 Revised:2017-03-14 Online:2018-01-20 Published:2018-01-20
  • Supported by:

    National Natural Science Foundation of China, No. 91537214, 41275079, 41305077, 41405069 and 41505078; The Key Foundation of Eduction Deparment of Sichuan Province, No. 16ZA0203; The Scientific Research Foundation of CUIT, No. J201516 and J201518; Meteorological Disaster Forecasting Warning and Emergency Management Research Center of Sichuan Province, No. ZHYJ16-YB06.

Abstract:

The variation of springtime northern branch ridge (SNBR) and its impact on precipitation and temperature in China are analyzed using NCEP/NCAR reanalysis data and the observational precipitation and temperature data at the 160 stations of China, with the methods of wavelet analysis, correlation analysis, etc. The results indicate that SNBR is gradually strengthening with periods of 2-3 years and quasi-6 years. Its position is moving eastward slightly with quasi-periods of 3 years and 12 years. When the SNBR is stronger (weaker), the spring precipitation from the Yellow River basin to south of the Yangtze River decreases (increases) obviously, while the spring precipitation rises (drops) in Northeast, Southwest and South China. When SNBR is eastward (westward), the spring pecipitation increases (decreases) in most part of the northern China and drops (rises) in most part of the southwest and southeast of China. Meanwhile, the springtime mean temperature in most part of China is higher (lower) than normal. When SNBR locates more westward (eastward), the precipitation decreases (increases) in the Huaihe River Basin, and rises (drops) in Northeast, Southwest and South China when the SNBR is strong (weak). The springtime mean temperature in most part of China is higher (lower) than normal. The relationship between the SNBR and the variation of the circulation can explain the climate change in China and improve the short-term climate forecasting.

Key words: atmospheric circulation, interannual and interdecadal variability, precipitation, springtime northern branch ridge, temperature

CLC Number: 

  • P467