Remote impact of North Atlantic sea surface temperature on rainfall in southwestern China during boreal spring

  • Gang Li
  • Jiepeng Chen
  • Xin Wang
  • Xia Luo
  • Daoyong Yang
  • Wen Zhou
  • Yanke Tan
  • Hongming Yan
Article

DOI: 10.1007/s00382-017-3625-x

Cite this article as:
Li, G., Chen, J., Wang, X. et al. Clim Dyn (2017). doi:10.1007/s00382-017-3625-x

Abstract

As an important oceanic signal, the North Atlantic sea surface temperature (SST) affects not only the climate variability over East China and Northeast China but also can affect climate variability over southwestern China (SWC). Based on station rainfall data and reanalysis datasets, the present study investigates the relationship of North Atlantic SST with SWC rainfall during boreal spring for the period 1979–2016. The results show that there is a significant positive correlation between North Atlantic SST and SWC rainfall during boreal spring. The atmospheric circulation over southern Asia associated with North Atlantic SST is favorable for positive rainfall anomalies. Further analyses show that North Atlantic SST can induce a North Atlantic–western Russia–western Tibetan Plateau–SWC (NRTC) teleconnection wave train from upper level to low level. At low level, two anomalous anticyclones are found over the mid-high latitude of North Atlantic and the western Tibetan Plateau, and two anomalous cyclones are observed over the western Russia and Bay of Bengal (BOB), respectively. The NRTC teleconnection wave train plays a bridging role between the North Atlantic SST and SWC rainfall during boreal spring. Both the observational analysis and two numerical experiments suggest that the North Atlantic SST during boreal spring can induce an anomalous cyclone over BOB by the NRTC teleconnection pattern. The anomalous cyclone over BOB favors moisture transport to SWC, accompanying with significant anomalous ascending motion, and thus results in positive rainfall anomalies in SWC during boreal spring.

Funding information

Funder NameGrant NumberFunding Note
National Basic Research program of China
  • 2013CB956203
National Natural Science Foundation of China
  • 41475070
  • 41575097
  • 41305045
Natural Science Foundation of Yunnan Province
  • 2016FA041
National Natural Science Foundation of China (CN)
  • 41490642

Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Gang Li
    • 1
  • Jiepeng Chen
    • 2
  • Xin Wang
    • 2
  • Xia Luo
    • 3
  • Daoyong Yang
    • 1
  • Wen Zhou
    • 4
  • Yanke Tan
    • 3
  • Hongming Yan
    • 5
  1. 1.Xichang Satellite Launch CenterXichangChina
  2. 2.State Key Laboratory of Tropical Oceanography, South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhouChina
  3. 3.College of Meteorology and OceanographyPLA University of Science and TechnologyNanjingChina
  4. 4.Guy Carpenter Asia-Pacific Climate Impact Centre, School of Energy and EnvironmentCity University of Hong KongHong KongChina
  5. 5.Yunnan Climate CenterKunmingChina

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