Global energetics and local physics as drivers of past, present and future monsoons

doi:10.1038/s41561-018-0137-1

Title: Global energetics and local physics as drivers of past, present and future monsoons

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Abstract

Global constraints on momentum and energy govern the variability of the rainfall belt in the intertropical convergence zone and the structure of the zonal mean tropical circulation. The continental-scale monsoon systems are also facets of a momentum- and energy-constrained global circulation, but their modern and palaeo variability deviates substantially from that of the intertropical convergence zone. The mechanisms underlying deviations from expectations based on the longitudinal mean budgets are neither fully understood nor simulated accurately. We argue that a framework grounded in global constraints on energy and momentum yet encompassing the complexities of monsoon dynamics is needed to identify the causes of the mismatch between theory, models and observations, and ultimately to improve regional climate projections. In a first step towards this goal, disparate regional processes must be distilled into gross measures of energy flow in and out of continents and between the surface and the tropopause, so that monsoon dynamics may be coherently diagnosed across modern and palaeo observations and across idealized and comprehensive simulations. Accounting for zonal asymmetries in the circulation, land/ocean differences in surface fluxes, and the character of convective systems, such a monsoon framework would integrate our understanding at all relevant scales: from the fine detailsmore »« less

Authors:

Biasutti, Michela ^[1]; Voigt, Aiko ^[2]; Boos, William R. ^[3]; Braconnot, Pascale ^[4];

^[5];

^[6]; Kang, Sarah M. ^[7];

^[8]; Scheff, Jacob ^[9]; Schumacher, Courtney ^[10]; Sobel, Adam H. ^[11]; Xie, Shang-Ping ^[12]

Columbia Univ., New York, NY (United States). Lamont-Doherty Earth Observatory
Columbia Univ., New York, NY (United States). Lamont-Doherty Earth Observatory; Karlsruhe Inst. of Technology (KIT) (Germany). Inst. of Meteorology and Climate Research
Univ. of California, Berkeley, CA (United States). Dept. of Earth and Planetary Science
Laboratoire des Sciences du Climat et de l’Environnement, Gif-sur-Yvette Cedex (France)
Blue Skies Research, Settle (United Kingdom)
Univ. of Reading, Reading (United Kingdom). School of Archaeology, Geography and Environmental Science
Ulsan National Institute of Science and Technology, Ulsan (South Korea). School of Urban and Environmental Engineering
Univ. of Miami, Miami, FL (United States)
Univ. of North Carolina, Charlotte, NC (United States). Dept. of Geography and Earth Sciences
Texas A & M Univ., College Station, TX (United States). Dept. of Atmospheric Sciences
Columbia Univ., New York, NY (United States). Lamont-Doherty Earth Observatory; Columbia Univ., New York, NY (United States). Dept. of Earth and Environmental Sciences and Dept. of Applied Physics and Applied Mathematics
Univ. of California, San Diego, CA (United States). Scripps Inst. of Oceanography

Publication Date:: 2018-05-31

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1561892

Grant/Contract Number:: AC02-05CH11231

Resource Type:: Accepted Manuscript

Journal Name:: Nature Geoscience

Additional Journal Information:: Journal Volume: 11; Journal Issue: 6; Journal ID: ISSN 1752-0894

Publisher:: Nature Publishing Group

Country of Publication:: United States

Language:: English

Subject:: 54 ENVIRONMENTAL SCIENCES

Citation Formats


                    Biasutti, Michela, Voigt, Aiko, Boos, William R., Braconnot, Pascale, Hargreaves, Julia C., Harrison, Sandy P., Kang, Sarah M., Mapes, Brian E., Scheff, Jacob, Schumacher, Courtney, Sobel, Adam H., and Xie, Shang-Ping. Global energetics and local physics as drivers of past, present and future monsoons.  United States: N. p., 2018. 
        Web.  doi:10.1038/s41561-018-0137-1.

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                    Biasutti, Michela, Voigt, Aiko, Boos, William R., Braconnot, Pascale, Hargreaves, Julia C., Harrison, Sandy P., Kang, Sarah M., Mapes, Brian E., Scheff, Jacob, Schumacher, Courtney, Sobel, Adam H., & Xie, Shang-Ping. Global energetics and local physics as drivers of past, present and future monsoons.  United States.  doi:10.1038/s41561-018-0137-1.

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                    Biasutti, Michela, Voigt, Aiko, Boos, William R., Braconnot, Pascale, Hargreaves, Julia C., Harrison, Sandy P., Kang, Sarah M., Mapes, Brian E., Scheff, Jacob, Schumacher, Courtney, Sobel, Adam H., and Xie, Shang-Ping. Thu .  
        "Global energetics and local physics as drivers of past, present and future monsoons".  United States.  doi:10.1038/s41561-018-0137-1.  https://www.osti.gov/servlets/purl/1561892.

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@article{osti_1561892,

  title        = {Global energetics and local physics as drivers of past, present and future monsoons},

  author       = {Biasutti, Michela and Voigt, Aiko and Boos, William R. and Braconnot, Pascale and Hargreaves, Julia C. and Harrison, Sandy P. and Kang, Sarah M. and Mapes, Brian E. and Scheff, Jacob and Schumacher, Courtney and Sobel, Adam H. and Xie, Shang-Ping},

  abstractNote = {Global constraints on momentum and energy govern the variability of the rainfall belt in the intertropical convergence zone and the structure of the zonal mean tropical circulation. The continental-scale monsoon systems are also facets of a momentum- and energy-constrained global circulation, but their modern and palaeo variability deviates substantially from that of the intertropical convergence zone. The mechanisms underlying deviations from expectations based on the longitudinal mean budgets are neither fully understood nor simulated accurately. We argue that a framework grounded in global constraints on energy and momentum yet encompassing the complexities of monsoon dynamics is needed to identify the causes of the mismatch between theory, models and observations, and ultimately to improve regional climate projections. In a first step towards this goal, disparate regional processes must be distilled into gross measures of energy flow in and out of continents and between the surface and the tropopause, so that monsoon dynamics may be coherently diagnosed across modern and palaeo observations and across idealized and comprehensive simulations. Accounting for zonal asymmetries in the circulation, land/ocean differences in surface fluxes, and the character of convective systems, such a monsoon framework would integrate our understanding at all relevant scales: from the fine details of how moisture and energy are lifted in the updrafts of thunderclouds, up to the global circulations.},

  doi          = {10.1038/s41561-018-0137-1},

  journal      = {Nature Geoscience},

  number       = 6,

  volume       = 11,

  place        = {United States},

  year         = {2018},

  month        = {5}

}

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