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Title: Intensification of the Pre-Meiyu Rainband in the Late 21st Century

Abstract

Increased atmospheric moisture content and changing land-ocean thermal contrasts are usually implicated in the East Asian summer rainfall response to global warming. We highlight an additional influence whereby increased meridional stationary eddy circulation downstream of the Tibetan Plateau drives a stronger moisture flux convergence over southeastern China, intensifying the early summer rainband. This effect occurs robustly across the Community Earth System Model large ensemble Representative Control Pathway 8.5 simulations, and only for its pre-Meiyu stage (mid-May through late June). The westerly jet impinging on the Plateau is also enhanced, suggesting an orographic influence on the westerlies as the root cause. The increased westerlies result from warmer tropical tropospheric temperatures that enhance the meridional temperature gradient at the latitudes of the Plateau. Finally, our results highlight the potential role of the westerlies in altering the East Asian early summer monsoon rainfall in the late 21st century.

Authors:
ORCiD logo [1];  [2];  [1];  [1]
  1. Univ. of California, Berkeley, CA (United States)
  2. Univ. of Hamburg (Germany)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
National Science Foundation (NSF); USDOE
OSTI Identifier:
1581351
Alternate Identifier(s):
OSTI ID: 1530619
Grant/Contract Number:  
AC02-05CH11231; SC0014078; AGS-1405479
Resource Type:
Accepted Manuscript
Journal Name:
Geophysical Research Letters
Additional Journal Information:
Journal Volume: 46; Journal Issue: 13; Journal ID: ISSN 0094-8276
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Chiang, John C. H., Fischer, Johannes, Kong, Wenwen, and Herman, Michael J. Intensification of the Pre-Meiyu Rainband in the Late 21st Century. United States: N. p., 2019. Web. doi:10.1029/2019gl083383.
Chiang, John C. H., Fischer, Johannes, Kong, Wenwen, & Herman, Michael J. Intensification of the Pre-Meiyu Rainband in the Late 21st Century. United States. doi:https://doi.org/10.1029/2019gl083383
Chiang, John C. H., Fischer, Johannes, Kong, Wenwen, and Herman, Michael J. Mon . "Intensification of the Pre-Meiyu Rainband in the Late 21st Century". United States. doi:https://doi.org/10.1029/2019gl083383. https://www.osti.gov/servlets/purl/1581351.
@article{osti_1581351,
title = {Intensification of the Pre-Meiyu Rainband in the Late 21st Century},
author = {Chiang, John C. H. and Fischer, Johannes and Kong, Wenwen and Herman, Michael J.},
abstractNote = {Increased atmospheric moisture content and changing land-ocean thermal contrasts are usually implicated in the East Asian summer rainfall response to global warming. We highlight an additional influence whereby increased meridional stationary eddy circulation downstream of the Tibetan Plateau drives a stronger moisture flux convergence over southeastern China, intensifying the early summer rainband. This effect occurs robustly across the Community Earth System Model large ensemble Representative Control Pathway 8.5 simulations, and only for its pre-Meiyu stage (mid-May through late June). The westerly jet impinging on the Plateau is also enhanced, suggesting an orographic influence on the westerlies as the root cause. The increased westerlies result from warmer tropical tropospheric temperatures that enhance the meridional temperature gradient at the latitudes of the Plateau. Finally, our results highlight the potential role of the westerlies in altering the East Asian early summer monsoon rainfall in the late 21st century.},
doi = {10.1029/2019gl083383},
journal = {Geophysical Research Letters},
number = 13,
volume = 46,
place = {United States},
year = {2019},
month = {7}
}

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Cited by: 1 work
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Works referenced in this record:

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journal, January 1949


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journal, August 2001


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journal, January 2009


Summertime land–sea thermal contrast and atmospheric circulation over East Asia in a warming climate—Part I: Past changes and future projections
journal, February 2014


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journal, August 2011


Role of seasonal transitions and westerly jets in East Asian paleoclimate
journal, January 2015


Early Summer Response of the East Asian Summer Monsoon to Atmospheric CO 2 Forcing and Subsequent Sea Surface Warming
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Orographic Controls on Climate and Paleoclimate of Asia: Thermal and Mechanical Roles for the Tibetan Plateau
journal, April 2010


    Works referencing / citing this record:

    The representative concentration pathways: an overview
    journal, August 2011


    Orographic Effects of the Tibetan Plateau on the East Asian Summer Monsoon: An Energetic Perspective
    journal, April 2014


    Jet–Precipitation Relation and Future Change of the Mei-Yu–Baiu Rainband and Subtropical Jet in CMIP5 Coupled GCM Simulations
    journal, April 2019

    • Horinouchi, Takeshi; Matsumura, Shinji; Ose, Tomoaki
    • Journal of Climate, Vol. 32, Issue 8
    • DOI: 10.1175/jcli-d-18-0426.1

    Role of seasonal transitions and westerly jets in East Asian paleoclimate
    journal, January 2015


    The Community Earth System Model (CESM) Large Ensemble Project: A Community Resource for Studying Climate Change in the Presence of Internal Climate Variability
    journal, August 2015

    • Kay, J. E.; Deser, C.; Phillips, A.
    • Bulletin of the American Meteorological Society, Vol. 96, Issue 8
    • DOI: 10.1175/bams-d-13-00255.1

    Early Summer Response of the East Asian Summer Monsoon to Atmospheric CO 2 Forcing and Subsequent Sea Surface Warming
    journal, August 2016


    Subtropical Anticyclones and Summer Monsoons
    journal, August 2001


    The Community Earth System Model: A Framework for Collaborative Research
    journal, September 2013

    • Hurrell, James W.; Holland, M. M.; Gent, P. R.
    • Bulletin of the American Meteorological Society, Vol. 94, Issue 9
    • DOI: 10.1175/bams-d-12-00121.1

    The East Asian summer monsoon: an overview
    journal, June 2005


    Orographic Controls on Climate and Paleoclimate of Asia: Thermal and Mechanical Roles for the Tibetan Plateau
    journal, April 2010


    East Asian hydroclimate modulated by the position of the westerlies during Termination I
    journal, November 2018

    • Zhang, Hongbin; Griffiths, Michael L.; Chiang, John C. H.
    • Science, Vol. 362, Issue 6414
    • DOI: 10.1126/science.aat9393

    Summertime land–sea thermal contrast and atmospheric circulation over East Asia in a warming climate—Part I: Past changes and future projections
    journal, February 2014


    Seasonal Transitions and the Westerly Jet in the Holocene East Asian Summer Monsoon
    journal, May 2017


    Monsoons in a changing world: A regional perspective in a global context: GLOBAL MONSOONS IN CMIP5 MODELS
    journal, April 2013

    • Kitoh, Akio; Endo, Hirokazu; Krishna Kumar, K.
    • Journal of Geophysical Research: Atmospheres, Vol. 118, Issue 8
    • DOI: 10.1002/jgrd.50258

    Extratropical Factors Affecting the Variability in Summer Precipitation over the Yangtze River Basin, China
    journal, October 2017


    Robust Responses of the Hydrological Cycle to Global Warming
    journal, November 2006

    • Held, Isaac M.; Soden, Brian J.
    • Journal of Climate, Vol. 19, Issue 21
    • DOI: 10.1175/jcli3990.1

    A Numerical Method for Predicting the Perturbations of the Middle Latitude Westerlies
    journal, May 1949


    A 44-Year Daily Gridded Precipitation Dataset for Asia Based on a Dense Network of Rain Gauges
    journal, January 2009


    Tug of war on summertime circulation between radiative forcing and sea surface warming
    journal, June 2015

    • Shaw, T. A.; Voigt, A.
    • Nature Geoscience, Vol. 8, Issue 7
    • DOI: 10.1038/ngeo2449

    The Mechanical Impact of the Tibetan Plateau on the Seasonal Evolution of the South Asian Monsoon
    journal, April 2012