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Title: Peak Rain Rate Sensitivity to Observed Cloud Condensation Nuclei and Turbulence in Continental Warm Shallow Clouds During CACTI

Journal Article · · Journal of Geophysical Research: Atmospheres
ORCiD logo [1];  [2]; ORCiD logo [3]
  1. Pacific Northwest National Laboratory Richland WA USA
  2. Pacific Northwest National Laboratory Richland WA USA, University of Utah Salt Lake City UT USA
  3. Pacific Northwest National Laboratory Richland WA USA, ClimateAI San Francisco CA USA
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Abstract Warm clouds strongly affect Earth's energy budget but remain imperfectly represented in climate models, partly due to the complexity and covariability of relevant processes influencing warm rain. This work presents a detailed analysis of different factors affecting rain rate peak intensity (RR) in continental warm clouds. Clouds were identified with vertically pointing radar and lidar observations and categorized via a temperature‐based cloud type classification algorithm from which warm clouds were isolated. Observations and retrievals of liquid water path (LWP), cloud condensation nuclei concentration (N CCN ), cloud depth, and cloud duration of more than 3,000 separate warm clouds sampled during the Cloud, Aerosol, and Complex Terrain Interactions (CACTI) field campaign are analyzed in this work. Multiple linear regression (MLR) and random forest (RF) models are applied to assess the relative impact of these variables on RR. Overall, RR tends to increase as cloud depth, LWP, and cloud duration increase, or N CCN decreases. Cloud depth affects RR the most while N CCN impacts it the least. When considering over 170 warm clouds observed at least 1 hr in which in‐cloud turbulence is retrieved, the effect of N CCN on RR remains most likely suppressive, but it is not significant at a 75% level for MLR and is highly uncertain for RF. The impact of in‐cloud turbulence depends on the moment and location it is sampled. Cloud base turbulence around the time of RR suppresses RR, while cloud top turbulence effects are inconclusive. Possible difficulties in isolating robust CCN and turbulence effects on RR are discussed.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). ARM Data Center; Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Biological and Environmental Research (BER)
Contributing Organization:
Argonne National Laboratory (ANL); Brookhaven National Laboratory (BNL); Oak Ridge National Laboratory (ORNL); Pacific Northwest National Laboratory (PNNL)
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1883418
Report Number(s):
PNNL-SA-171430; e2022JD036864
Journal Information:
Journal of Geophysical Research: Atmospheres, Journal Name: Journal of Geophysical Research: Atmospheres Journal Issue: 16 Vol. 127; ISSN 2169-897X
Publisher:
American Geophysical Union (AGU)Copyright Statement
Country of Publication:
United States
Language:
English

References (73)

Aerosol impacts on drizzle properties in warm clouds from ARM Mobile Facility maritime and continental deployments: Aerosol impacts on drizzle at AMF sites journal April 2014
On the unified estimation of turbulence eddy dissipation rate using Doppler cloud radars and lidars: Radar and Lidar Turbulence Estimation journal May 2016
The role of air turbulence in warm rain initiation journal January 2009
On the relationship between cloud contact time and precipitation susceptibility to aerosol: PRECIPITATION SUSCEPTIBILITY journal September 2013
Droplet growth in warm turbulent clouds
  • Devenish, B. J.; Bartello, P.; Brenguier, J. -L.
  • Quarterly Journal of the Royal Meteorological Society, Vol. 138, Issue 667 https://doi.org/10.1002/qj.1897
journal February 2012
Invigoration of cumulus cloud fields by mesoscale ascent: Invigoration of Cumulus Cloud Fields journal May 2012
Simultaneous measurements of the turbulent and microphysical structure of nocturnal stratocumulus cloud journal January 1984
The Elements of Statistical Learning book January 2009
On the interpretation of inter-model spread in CMIP5 climate sensitivity estimates journal March 2013
Evaporation and condensation of water mist/cloud droplets with thermal radiation journal September 2015
Random Forests journal January 2001
On the relationship among cloud turbulence, droplet formation and drizzle as viewed by Doppler radar, microwave radiometer and lidar journal September 1999
TRMM observed first direct evidence of smoke from forest fires inhibiting rainfall journal October 1999
First measurements of the Twomey indirect effect using ground-based remote sensors: SURFACE REMOTE SENSING OF THE INDIRECT EFFECT journal March 2003
Effective radius of cloud droplets by ground-based remote sensing: Relationship to aerosol journal January 2003
Marine boundary layer clouds at the heart of tropical cloud feedback uncertainties in climate models journal January 2005
Cloud radiative forcing at the Atmospheric Radiation Measurement Program Climate Research Facility: 2. Vertical redistribution of radiant energy by clouds journal January 2006
Effect of aerosol on warm convective clouds: Aerosol-cloud-surface flux feedbacks in a new coupled large eddy model journal January 2006
Aerosol-cloud relationships in continental shallow cumulus journal January 2008
Can aerosol decrease cloud lifetime? journal January 2009
Lateral entrainment rate in shallow cumuli: Dependence on dry air sources and probability density functions journal October 2012
Modeling the Effect of Radiation on Warm Rain Initiation journal July 2018
A modeling study of the effect of drizzle on cloud optical depth and susceptibility journal June 1997
Spread in model climate sensitivity traced to atmospheric convective mixing journal January 2014
An update on Earth's energy balance in light of the latest global observations journal September 2012
Clouds, circulation and climate sensitivity journal March 2015
Effects of turbulence on the geometric collision rate of sedimenting droplets. Part 2. Theory and parameterization journal July 2008
Aerosols, Cloud Microphysics, and Fractional Cloudiness journal September 1989
Growth of Cloud Droplets in a Turbulent Environment journal January 2013
P ARTICLE -T URBULENCE I NTERACTIONS IN A TMOSPHERIC C LOUDS journal January 2003
A Reduction in Rainfall Associated with Smoke from Sugar-Cane Fires—An Inadvertent Weather Modification? journal April 1968
Warm-Rain Initiation: An Overview of Microphysical Mechanisms journal April 1993
Convection in TOGA COARE: Horizontal Scale, Morphology, and Rainfall Production journal September 1998
Collisions of Small Drops in a Turbulent Flow. Part I: Collision Efficiency. Problem Formulation and Preliminary Results journal August 1999
Observations of Marine Stratocumulus Clouds During FIRE journal June 1988
Satellite–Based Insights into Precipitation Formation Processes in Continental and Maritime Convective Clouds journal November 1998
A Warm Rain Microphysics Parameterization that Includes the Effect of Turbulence journal June 2008
What Controls the Transition from Shallow to Deep Convection? journal June 2009
CLOUDS AND MORE: ARM Climate Modeling Best Estimate Data: A New Data Product for Climate Studies journal January 2010
Modeling Mesoscale Cellular Structures and Drizzle in Marine Stratocumulus. Part I: Impact of Drizzle on the Formation and Evolution of Open Cells journal November 2009
The Arm Climate Research Facility: A Review of Structure and Capabilities journal March 2013
The DOE ARM Aerial Facility journal May 2014
Utilizing a Storm-Generating Hotspot to Study Convective Cloud Transitions: The CACTI Experiment journal April 2021
The Role of Cloud Size and Environmental Moisture in Shallow Cumulus Precipitation journal March 2020
Turbulence in The Marine Boundary Layer and Air Motions Below Stratocumulus Clouds at the ARM Eastern North Atlantic Site journal September 2021
Turbulent Mixing in Shallow Trade Wind Cumuli: Dependence on Cloud Life Cycle journal April 2015
Review of Aerosol–Cloud Interactions: Mechanisms, Significance, and Challenges journal November 2016
The Route to Raindrop Formation in a Shallow Cumulus Cloud Simulated by a Lagrangian Cloud Model journal July 2017
Parameterization of Vertical Profiles of Governing Microphysical Parameters of Shallow Cumulus Cloud Ensembles Using LES with Bin Microphysics journal February 2019
Relationship between Turbulence and Drizzle in Continental and Marine Low Stratiform Clouds journal December 2018
A Cloud Microphysics Parameterization for Shallow Cumulus Clouds Based on Lagrangian Cloud Model Simulations journal October 2018
Quantification of the Radiative Effect of Aerosol–Cloud Interactions in Shallow Continental Cumulus Clouds journal July 2020
Life Cycle of Numerically Simulated Shallow Cumulus Clouds. Part II: Mixing Dynamics journal May 2005
A Climatology of Midlatitude Continental Clouds from the ARM SGP Central Facility. Part II: Cloud Fraction and Surface Radiative Forcing journal May 2006
Impact Mechanisms of Shallow Cumulus Convection on Tropical Climate Dynamics journal June 2007
Long-Term Retrievals of Cloud Type and Fair-Weather Shallow Cumulus Events at the ARM SGP Site journal October 2019
Stratocumulus Clouds journal August 2012
Convective Storm Life Cycle and Environments near the Sierras de Córdoba, Argentina journal August 2018
Deep Convection Initiation, Growth, and Environments in the Complex Terrain of Central Argentina during CACTI journal May 2022
Constraints on Climate Sensitivity from Space-Based Measurements of Low-Cloud Reflection journal August 2016
Effects of in-cloud nucleation and turbulence on droplet spectrum formation in cumulus clouds journal January 2002
Broadening of droplet size distributions from entrainment and mixing in a cumulus cloud
  • Lasher-Trapp, Sonia G.; Cooper, William A.; Blyth, Alan M.
  • Quarterly Journal of the Royal Meteorological Society, Vol. 131, Issue 605 https://doi.org/10.1256/qj.03.199
journal January 2005
Laser Disdrometer Quantities (LDQUANTS) and Video Disdrometer Quantities (VDISQUANTS) Value-Added Products Report report April 2020
Backward Adaptive Brightness Temperature Threshold Technique (BAB3T): A Methodology to Determine Extreme Convective Initiation Regions Using Satellite Infrared Imagery journal January 2020
Does precipitation susceptibility vary with increasing cloud thickness in marine stratocumulus? journal January 2012
The effects of turbulent collision–coalescence on precipitation formation and precipitation-dynamical feedbacks in simulations of stratocumulus and shallow cumulus convection journal January 2014
Turbulence effects on warm-rain formation in precipitating shallow convection revisited journal January 2016
Long-resident droplets at the stratocumulus top journal January 2016
Cloud droplet growth in shallow cumulus clouds considering 1-D and 3-D thermal radiative effects journal May 2019
Droplet inhomogeneity in shallow cumuli: the effects of in-cloud location and aerosol number concentration journal January 2019
Quantifying the bias of radiative heating rates in numerical weather prediction models for shallow cumulus clouds journal June 2019
Automated rain rate estimates using the Ka-band ARM zenith radar (KAZR) journal January 2015
Size-dependence in chord characteristics from simulated and observed continental shallow cumulus text January 2020

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Related Subjects

54 ENVIRONMENTAL SCIENCES
CACTI
aerosols
cloud radar
drizzle
shallow clouds
turbulence