On the sizes and lifetimes of cold pools
Abstract
Cold pools of air, which are formed by evaporating precipitation, play a critical role in the triggering of new precipitation. Despite their recognized importance, little effort has been devoted to building simple models of their dynamics. Here, analytical equations are derived for the radius, height, and buoyancy of a cylindrical cold pool as a function of time, and a scale analysis reveals that entrainment is a dominant influence. These governing equations yield simple expressions for the maximum sizes and lifetimes of cold pools. The terminal radius of a cold pool is relatively insensitive to its initial conditions, with a typical maximum radius of about 14 times the initial radius, give or take a factor of 2. The terminal time of a cold pool, on the other hand, can vary over orders of magnitude depending on its initial potential and kinetic energies. Lastly, these predictions are validated against large-eddy simulations.
- Authors:
-
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Climate and Ecosystem Sciences Division; Univ. of California, Berkeley, CA (United States). Dept. of Earth and Planetary Science
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Climate and Ecosystem Sciences Division; Univ. of California, Berkeley, CA (United States). Dept. of Physics
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF)
- OSTI Identifier:
- 1471012
- Grant/Contract Number:
- AC02-05CH11231; ACI‐1053575
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Quarterly Journal of the Royal Meteorological Society
- Additional Journal Information:
- Journal Volume: 142; Journal Issue: 696; Journal ID: ISSN 0035-9009
- Publisher:
- Royal Meteorological Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES
Citation Formats
Romps, David M., and Jeevanjee, Nadir. On the sizes and lifetimes of cold pools. United States: N. p., 2016.
Web. doi:10.1002/qj.2754.
Romps, David M., & Jeevanjee, Nadir. On the sizes and lifetimes of cold pools. United States. https://doi.org/10.1002/qj.2754
Romps, David M., and Jeevanjee, Nadir. Fri .
"On the sizes and lifetimes of cold pools". United States. https://doi.org/10.1002/qj.2754. https://www.osti.gov/servlets/purl/1471012.
@article{osti_1471012,
title = {On the sizes and lifetimes of cold pools},
author = {Romps, David M. and Jeevanjee, Nadir},
abstractNote = {Cold pools of air, which are formed by evaporating precipitation, play a critical role in the triggering of new precipitation. Despite their recognized importance, little effort has been devoted to building simple models of their dynamics. Here, analytical equations are derived for the radius, height, and buoyancy of a cylindrical cold pool as a function of time, and a scale analysis reveals that entrainment is a dominant influence. These governing equations yield simple expressions for the maximum sizes and lifetimes of cold pools. The terminal radius of a cold pool is relatively insensitive to its initial conditions, with a typical maximum radius of about 14 times the initial radius, give or take a factor of 2. The terminal time of a cold pool, on the other hand, can vary over orders of magnitude depending on its initial potential and kinetic energies. Lastly, these predictions are validated against large-eddy simulations.},
doi = {10.1002/qj.2754},
journal = {Quarterly Journal of the Royal Meteorological Society},
number = 696,
volume = 142,
place = {United States},
year = {2016},
month = {1}
}
Web of Science
Works referenced in this record:
An Expression for Effective Buoyancy in Surroundings with Horizontal Density Gradients
journal, December 2003
- Davies-Jones, Robert
- Journal of the Atmospheric Sciences, Vol. 60, Issue 23
On gravity currents driven by constant fluxes of saline and particle-laden fluid in the presence of a uniform flow
journal, September 2005
- Hogg, Andrew J.; Hallworth, Mark A.; Huppert, Herbert E.
- Journal of Fluid Mechanics, Vol. 539, Issue -1
High-Resolution Simulation of Shallow-to-Deep Convection Transition over Land
journal, December 2006
- Khairoutdinov, Marat; Randall, David
- Journal of the Atmospheric Sciences, Vol. 63, Issue 12
Effective Buoyancy, Inertial Pressure, and the Mechanical Generation of Boundary Layer Mass Flux by Cold Pools
journal, August 2015
- Jeevanjee, Nadir; Romps, David M.
- Journal of the Atmospheric Sciences, Vol. 72, Issue 8
The Dry-Entropy Budget of a Moist Atmosphere
journal, December 2008
- Romps, David M.
- Journal of the Atmospheric Sciences, Vol. 65, Issue 12
Organization of Tropical Convection in Low Vertical Wind Shears: The Role of Cold Pools
journal, July 2001
- Tompkins, Adrian M.
- Journal of the Atmospheric Sciences, Vol. 58, Issue 13
Mechanisms of convective cloud organization by cold pools over tropical warm ocean during the AMIE/DYNAMO field campaign
journal, April 2015
- Feng, Zhe; Hagos, Samson; Rowe, Angela K.
- Journal of Advances in Modeling Earth Systems, Vol. 7, Issue 2
Mechanisms for convection triggering by cold pools
journal, March 2015
- Torri, Giuseppe; Kuang, Zhiming; Tian, Yang
- Geophysical Research Letters, Vol. 42, Issue 6
A mathematical framework for the analysis of particle–driven gravity currents
journal, May 2001
- Harris, Thomas C.; Hogg, Andrew J.; Huppert, Herbert E.
- Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, Vol. 457, Issue 2009
Sticky Thermals: Evidence for a Dominant Balance between Buoyancy and Drag in Cloud Updrafts
journal, August 2015
- Romps, David M.; Charn, Alexander B.
- Journal of the Atmospheric Sciences, Vol. 72, Issue 8
Quantitative modelling of granular suspension flows
journal, November 1998
- Huppert, Herbert E.
- Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, Vol. 356, Issue 1747
Constraints on Cumulus Parameterization from Simulations of Observed MJO Events
journal, August 2015
- Del Genio, Anthony D.; Wu, Jingbo; Wolf, Audrey B.
- Journal of Climate, Vol. 28, Issue 16
A Density Current Parameterization Coupled with Emanuel’s Convection Scheme. Part II: 1D Simulations
journal, April 2010
- Grandpeix, Jean-Yves; Lafore, Jean-Philippe; Cheruy, Frédérique
- Journal of the Atmospheric Sciences, Vol. 67, Issue 4
Simple Models of the Role of Surface Fluxes in Convective Cold Pool Evolution
journal, July 2004
- Ross, A. N.; Tompkins, A. M.; Parker, D. J.
- Journal of the Atmospheric Sciences, Vol. 61, Issue 13
On Trade Wind Cumulus Cold Pools
journal, January 2012
- Zuidema, Paquita; Li, Zhujun; Hill, Reginald J.
- Journal of the Atmospheric Sciences, Vol. 69, Issue 1
A Density Current Parameterization Coupled with Emanuel’s Convection Scheme. Part I: The Models
journal, April 2010
- Grandpeix, Jean-Yves; Lafore, Jean-Philippe
- Journal of the Atmospheric Sciences, Vol. 67, Issue 4
A Convective Wake Parameterization Scheme for Use in General Circulation Models
journal, February 1998
- Qian, Liying; Young, George S.; Frank, William M.
- Monthly Weather Review, Vol. 126, Issue 2
Test of a Convective Wake Parameterization in the Single-Column Version of CCM3
journal, June 1999
- Rozbicki, John J.; Young, George S.; Qian, Liying
- Monthly Weather Review, Vol. 127, Issue 6
A box model for non-entraining, suspension-driven gravity surges on horizontal surfaces
journal, June 1995
- Dade, W. Brian; Huppert, Herbert E.
- Sedimentology, Vol. 42, Issue 3
Entrainment and detrainment in cumulus convection: an overview
journal, June 2012
- de Rooy, Wim C.; Bechtold, Peter; Fröhlich, Kristina
- Quarterly Journal of the Royal Meteorological Society, Vol. 139, Issue 670
Influence of the Subcloud Layer on the Development of a Deep Convective Ensemble
journal, September 2012
- Böing, Steven J.; Jonker, Harm J. J.; Siebesma, A. Pier
- Journal of the Atmospheric Sciences, Vol. 69, Issue 9
Stereo photogrammetry reveals substantial drag on cloud thermals: STEREO PHOTOGRAMMETRY OF CLOUD THERMALS
journal, June 2015
- Romps, David M.; Öktem, Rusen
- Geophysical Research Letters, Vol. 42, Issue 12
Effective buoyancy at the surface and aloft: Effective Buoyancy
journal, November 2015
- Jeevanjee, Nadir; Romps, David M.
- Quarterly Journal of the Royal Meteorological Society, Vol. 142, Issue 695
Control of deep convection by sub-cloud lifting processes: the ALP closure in the LMDZ5B general circulation model
journal, September 2012
- Rio, Catherine; Grandpeix, Jean-Yves; Hourdin, Frédéric
- Climate Dynamics, Vol. 40, Issue 9-10
Mesoscale Cloud Patterns Revealed by Apollo-Soyuz Photographs
journal, November 1978
- Black, Peter G.
- Bulletin of the American Meteorological Society, Vol. 59, Issue 11
The slumping of gravity currents
journal, August 1980
- Huppert, Herbert E.; Simpson, John E.
- Journal of Fluid Mechanics, Vol. 99, Issue 4
Do Undiluted Convective Plumes Exist in the Upper Tropical Troposphere?
journal, February 2010
- Romps, David M.; Kuang, Zhiming
- Journal of the Atmospheric Sciences, Vol. 67, Issue 2
Works referencing / citing this record:
On Cold Pool Collisions in Tropical Boundary Layers
journal, January 2019
- Torri, Giuseppe; Kuang, Zhiming
- Geophysical Research Letters, Vol. 46, Issue 1
Convective Self‐Aggregation As a Cold Pool‐Driven Critical Phenomenon
journal, April 2019
- Haerter, Jan O.
- Geophysical Research Letters, Vol. 46, Issue 7
Circling in on Convective Organization
journal, June 2019
- Haerter, Jan O.; Böing, Steven J.; Henneberg, Olga
- Geophysical Research Letters, Vol. 46, Issue 12
Tracking the Gust Fronts of Convective Cold Pools
journal, November 2019
- Fournier, Marielle B.; Haerter, Jan O.
- Journal of Geophysical Research: Atmospheres, Vol. 124, Issue 21
Tropical continental downdraft characteristics: mesoscale systems versus unorganized convection
journal, January 2018
- Schiro, Kathleen A.; Neelin, J. David
- Atmospheric Chemistry and Physics, Vol. 18, Issue 3
Tracking the Gust Fronts of Convective Cold Pools
text, January 2020
- Fournier, Marielle B.; Haerter, Jan O.
- arXiv
Convective Self-Aggregation as a Cold-Pool Driven Critical Phenomenon
text, January 2020
- Haerter, Jan O.
- arXiv