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Journal of Meteorological Research

, Volume 32, Issue 5, pp 781–793 | Cite as

Water Vapor Transport Related to the Interdecadal Shift of Summer Precipitation over Northern East Asia in the Late 1990s

  • Po Hu
  • Minghao Wang
  • Liu Yang
  • Xiaojuan Wang
  • Guolin Feng
Regular Articles
  • 10 Downloads

Abstract

In this study, an interdecadal shift of summer precipitation over northern East Asia (NEA) was identified, demonstrating that summer precipitation decreased abruptly after 1998/99. The synchronous shift in summer moisture budget and water vapor transport over NEA was further investigated by using the NCEP/NCAR reanalysis data. The results indicate that water vapor transported northward into NEA from three low-latitude paths was limited because most water vapor was transported eastward. Water vapor transported from the westerly path in mid–high (WMH) latitudes exhibited significant correlations with summer precipitation in NEA and experienced a significant adjustment in the late 1990s. Regarding the spatial distributions of water vapor transport, less input was found through the western boundary while more output occurred through the eastern boundary of NEA, and zonal water vapor transport fluxes mainly concentrated at the low to middle levels, which led to the summer precipitation shift in NEA around the late 1990s. Furthermore, it is also confirmed that the wind anomalies (rather than the moisture disturbance) as the dominant internal dynamic factor and Pacific Decadal Oscillation/Atlantic Multidecadal Oscillation (PDO/AMO) as possible external force played important roles in influencing the water vapor transport and causing the summer precipitation shift over NEA in the late 1990s.

Key words

summer precipitation water vapor transport interdecadal shift northern East Asia 

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Notes

Acknowledgements

The authors thank Hongming Yan, Yuan Yuan, and Jianbo Cheng for help proofreading this paper. Moreover, we are grateful to the editors and reviewers for their valuable comments.

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Copyright information

© The Chinese Meteorological Society and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Po Hu
    • 1
    • 2
  • Minghao Wang
    • 3
  • Liu Yang
    • 1
  • Xiaojuan Wang
    • 5
  • Guolin Feng
    • 2
    • 4
  1. 1.College of Atmospheric SciencesLanzhou UniversityLanzhouChina
  2. 2.Laboratory for Climate Studies, National Climate CenterChina Meteorological AdministrationBeijingChina
  3. 3.Changwang School of HonorsNanjing University of Information Science &TechnologyNanjingChina
  4. 4.College of Physical Science and TechnologyYangzhou UniversityYangzhouChina
  5. 5.College of Physics and Electronic EngineeringChangshu Institute of TechnologyChangshuChina

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