skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Acceleration of tropical cyclogenesis by self-aggregation feedbacks

Abstract

Idealized simulations of tropical moist convection have revealed that clouds can spontaneously clump together in a process called self-aggregation. This results in a state where a moist cloudy region with intense deep convection is surrounded by extremely dry subsiding air devoid of deep convection. Because of the idealized settings of the simulations where it was discovered, the relevance of self-aggregation to the real world is still debated. Here in this study, we show that self-aggregation feedbacks play a leadingorder role in the spontaneous genesis of tropical cyclones in cloudresolving simulations. Those feedbacks accelerate the cyclogenesis process by a factor of 2, and the feedbacks contributing to the cyclone formation show qualitative and quantitative agreement with the self-aggregation process. Once the cyclone is formed, wind-induced surface heat exchange (WISHE) effects dominate, although we find that self-aggregation feedbacks have a small but nonnegligible contribution to the maintenance of the mature cyclone. In conclusion, our results suggest that self-aggregation, and the framework developed for its study, can help shed more light into the physical processes leading to cyclogenesis and cyclone intensification. In particular, our results point out the importance of the longwave radiative cooling outside the cyclone.

Authors:
ORCiD logo [1];  [2]
  1. Sorbonne Université, École Polytechnique, CNRS, Paris (France). Laboratoire de Météorologie Dynamique (LMD)/Institut Pierre Simon Laplace (IPSL), École Normale Supérieure, Paris Sciences & Lettres (PSL) Research University
  2. Univ. of California, Berkeley, CA (United States). Department of Earth and Planetary Science; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Climate and Ecosystem Sciences Division
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1479393
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 115; Journal Issue: 12; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; tropical cyclones; convective aggregation; deep convection; tropical cyclogenesis; tropical cyclone intensification

Citation Formats

Muller, Caroline J., and Romps, David M. Acceleration of tropical cyclogenesis by self-aggregation feedbacks. United States: N. p., 2018. Web. doi:10.1073/pnas.1719967115.
Muller, Caroline J., & Romps, David M. Acceleration of tropical cyclogenesis by self-aggregation feedbacks. United States. doi:10.1073/pnas.1719967115.
Muller, Caroline J., and Romps, David M. Mon . "Acceleration of tropical cyclogenesis by self-aggregation feedbacks". United States. doi:10.1073/pnas.1719967115. https://www.osti.gov/servlets/purl/1479393.
@article{osti_1479393,
title = {Acceleration of tropical cyclogenesis by self-aggregation feedbacks},
author = {Muller, Caroline J. and Romps, David M.},
abstractNote = {Idealized simulations of tropical moist convection have revealed that clouds can spontaneously clump together in a process called self-aggregation. This results in a state where a moist cloudy region with intense deep convection is surrounded by extremely dry subsiding air devoid of deep convection. Because of the idealized settings of the simulations where it was discovered, the relevance of self-aggregation to the real world is still debated. Here in this study, we show that self-aggregation feedbacks play a leadingorder role in the spontaneous genesis of tropical cyclones in cloudresolving simulations. Those feedbacks accelerate the cyclogenesis process by a factor of 2, and the feedbacks contributing to the cyclone formation show qualitative and quantitative agreement with the self-aggregation process. Once the cyclone is formed, wind-induced surface heat exchange (WISHE) effects dominate, although we find that self-aggregation feedbacks have a small but nonnegligible contribution to the maintenance of the mature cyclone. In conclusion, our results suggest that self-aggregation, and the framework developed for its study, can help shed more light into the physical processes leading to cyclogenesis and cyclone intensification. In particular, our results point out the importance of the longwave radiative cooling outside the cyclone.},
doi = {10.1073/pnas.1719967115},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 12,
volume = 115,
place = {United States},
year = {2018},
month = {3}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

Figures / Tables:

Figure 1 Figure 1: Cyclone evolution in CTRL and sensitivity runs. (A–D) Snapshots of $\int$MSE at day 100 of the simulations. (E-H) Time evolution of the SD of $\int$MSE and of the domain-averaged wind speed near the surface (m∙s-1 at the first atmospheric level z=37.5 m).

Save / Share:

Works referenced in this record:

Cloud Resolving Modeling of the ARM Summer 1997 IOP: Model Formulation, Results, Uncertainties, and Sensitivities
journal, February 2003


Convective Self-Aggregation in Numerical Simulations: A Review
journal, February 2017

  • Wing, Allison A.; Emanuel, Kerry; Holloway, Christopher E.
  • Surveys in Geophysics, Vol. 38, Issue 6
  • DOI: 10.1007/s10712-017-9408-4

What favors convective aggregation and why?: WHAT FAVORS CONVECTIVE AGGREGATION
journal, July 2015

  • Muller, Caroline; Bony, Sandrine
  • Geophysical Research Letters, Vol. 42, Issue 13
  • DOI: 10.1002/2015GL064260

T ROPICAL C YCLONES
journal, May 2003


Tropical cyclogenesis in a tropical wave critical layer: easterly waves
journal, January 2009

  • Dunkerton, T. J.; Montgomery, M. T.; Wang, Z.
  • Atmospheric Chemistry and Physics, Vol. 9, Issue 15
  • DOI: 10.5194/acp-9-5587-2009

Self-aggregation of convection in long channel geometry: Self-Aggregation in Channel Geometry
journal, September 2015

  • Wing, Allison A.; Cronin, Timothy W.
  • Quarterly Journal of the Royal Meteorological Society, Vol. 142, Issue 694
  • DOI: 10.1002/qj.2628

An Energy-Balance Analysis of Deep Convective Self-Aggregation above Uniform SST
journal, December 2005

  • Bretherton, Christopher S.; Blossey, Peter N.; Khairoutdinov, Marat
  • Journal of the Atmospheric Sciences, Vol. 62, Issue 12
  • DOI: 10.1175/JAS3614.1

An Air-Sea Interaction Theory for Tropical Cyclones. Part I: Steady-State Maintenance
journal, March 1986


Rotating radiative-convective equilibrium simulated by a cloud-resolving model: ROTATING RCE
journal, December 2013

  • Khairoutdinov, Marat; Emanuel, Kerry
  • Journal of Advances in Modeling Earth Systems, Vol. 5, Issue 4
  • DOI: 10.1002/2013MS000253

The Formation of Moist Vortices and Tropical Cyclones in Idealized Simulations
journal, September 2015


Physical mechanisms controlling self-aggregation of convection in idealized numerical modeling simulations: SELF-AGGREGATION MECHANISMS
journal, February 2014

  • Wing, Allison A.; Emanuel, Kerry A.
  • Journal of Advances in Modeling Earth Systems, Vol. 6, Issue 1
  • DOI: 10.1002/2013MS000269

Role of Radiative–Convective Feedbacks in Spontaneous Tropical Cyclogenesis in Idealized Numerical Simulations
journal, July 2016

  • Wing, Allison A.; Camargo, Suzana J.; Sobel, Adam H.
  • Journal of the Atmospheric Sciences, Vol. 73, Issue 7
  • DOI: 10.1175/JAS-D-15-0380.1

Large-scale character of an atmosphere in rotating radiative-convective equilibrium
journal, July 2014

  • Shi, Xiaoming; Bretherton, Christopher S.
  • Journal of Advances in Modeling Earth Systems, Vol. 6, Issue 3
  • DOI: 10.1002/2014MS000342

Detailed Investigation of the Self-Aggregation of Convection in Cloud-Resolving Simulations
journal, August 2012

  • Muller, Caroline J.; Held, Isaac M.
  • Journal of the Atmospheric Sciences, Vol. 69, Issue 8
  • DOI: 10.1175/JAS-D-11-0257.1

Radiative-Convective Equilibrium with Explicit Two-Dimensional Moist Convection
journal, December 1993


Isentropic Analysis of a Simulated Hurricane
journal, May 2016

  • Mrowiec, Agnieszka A.; Pauluis, Olivier M.; Zhang, Fuqing
  • Journal of the Atmospheric Sciences, Vol. 73, Issue 5
  • DOI: 10.1175/JAS-D-15-0063.1

Is Tropical Cyclone Intensity Guidance Improving?
journal, March 2014

  • DeMaria, Mark; Sampson, Charles R.; Knaff, John A.
  • Bulletin of the American Meteorological Society, Vol. 95, Issue 3
  • DOI: 10.1175/BAMS-D-12-00240.1

Isentropic Analysis of Convective Motions
journal, November 2013

  • Pauluis, Olivier M.; Mrowiec, Agnieszka A.
  • Journal of the Atmospheric Sciences, Vol. 70, Issue 11
  • DOI: 10.1175/JAS-D-12-0205.1

    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.