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Office of Scientific and Technical Information
 

Simulations of Arctic Mixed-Phase Clouds in Forecasts with CAM3 and AM2 for M-PACE

Journal Article · · Journal of Geophysical Research - Atmospheres
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Simulations of mixed-phase clouds in short-range forecasts with the National Center for Atmospheric Research Community Atmosphere Model version 3 (CAM3) and the Geophysical Fluid Dynamics Laboratory (GFDL) climate model (AM2) for the Mixed-Phase Arctic Cloud Experiment (M-PACE) are performed under the DOE CCPP-ARM Parameterization Testbed (CAPT), which initializes the climate models with analysis data produced from numerical weather prediction (NWP) centers. It is shown that CAM3 significantly underestimates the observed boundary layer mixed-phase clouds and cannot realistically simulate the variations with temperature and cloud height of liquid water fraction in the total cloud condensate based an oversimplified cloud microphysical scheme. In contrast, AM2 reasonably reproduces the observed boundary layer clouds while its clouds contain much less cloud condensate than CAM3 and the observations. Both models underestimate the observed cloud top and base for the boundary layer clouds. The simulation of the boundary layer mixed-phase clouds and their microphysical properties is considerably improved in CAM3 when a new physically based cloud microphysical scheme is used. The new scheme also leads to an improved simulation of the surface and top of the atmosphere longwave radiative fluxes in CAM3. It is shown that the Bergeron-Findeisen process, i.e., the ice crystal growth by vapor deposition at the expense of coexisting liquid water, is important for the models to correctly simulate the characteristics of the observed microphysical properties in mixed-phase clouds. Sensitivity tests show that these results are not sensitive to the analysis data used for model initializations. Increasing model horizontal resolution helps capture the subgrid-scale features in Arctic frontal clouds but does not help improve the simulation of the single-layer boundary layer clouds. Ice crystal number density has large impact on the model simulated mixed-phase clouds and their microphysical properties and needs to be accurately represented in climate models.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
924674
Report Number(s):
PNNL-SA-56412; KP1205010
Journal Information:
Journal of Geophysical Research - Atmospheres, Journal Name: Journal of Geophysical Research - Atmospheres Vol. 113; ISSN 0747-7309
Country of Publication:
United States
Language:
English

References (48)

Modeling the Interactions between Aerosols and Liquid Water Clouds with a Self-Consistent Cloud Scheme in a General Circulation Model journal April 2007
A Scheme for Calculation of the Liquid Fraction in Mixed-Phase Stratiform Clouds in Large-Scale Models journal April 2000
An assessment of ECMWF analyses and model forecasts over the North Slope of Alaska using observations from the ARM Mixed-Phase Arctic Cloud Experiment journal January 2006
Autumnal Mixed-Phase Cloudy Boundary Layers in the Arctic journal June 1998
Numerical Simulation of the Effects of Varying Ice Crystal Nucleation Rates and Aggregation Processes on Orographic Snowfall journal November 1986
Retrieving Liquid Wat0er Path and Precipitable Water Vapor From the Atmospheric Radiation Measurement (ARM) Microwave Radiometers journal November 2007
The Impact of Cloud Feedbacks on Arctic Climate under Greenhouse Forcing* journal February 2004
A Refined Two-Channel Microwave Radiometer Liquid Water Path Retrieval for Cold Regions by Using Multiple-Sensor Measurements journal October 2007
Liquid and Ice Cloud Microphysics in the CSU General Circulation Model. Part 1: Model Description and Simulated Microphysical Processes journal March 1996
The sensitivity of climate simulations to the specification of mixed phase clouds journal July 1996
The Mixed-Phase Arctic Cloud Experiment journal February 2007
Overview of Arctic Cloud and Radiation Characteristics journal August 1996
New Primary Ice-Nucleation Parameterizations in an Explicit Cloud Model journal July 1992
The Formulation and Atmospheric Simulation of the Community Atmosphere Model Version 3 (CAM3) journal June 2006
FIRE Arctic Clouds Experiment journal January 2000
Cloud Resolving Simulations of Mixed-Phase Arctic Stratus Observed during BASE: Sensitivity to Concentration of Ice Crystals and Large-Scale Heat and Moisture Advection journal July 2000
Performance of two cloud-radiation parameterization schemes in the finite volume general circulation model for anomalously wet May and June 2003 over the continental United States and Amazonia journal January 2006
Microstructures of low and middle-level clouds over the Beaufort Sea journal July 1998
Ice nucleation parameterization for global models [Ice nucleation parameterization for global models] journal September 2005
Moisture and temperature balances at the Atmospheric Radiation Measurement Southern Great Plains Site in forecasts with the Community Atmosphere Model (CAM2) journal January 2005
Inclusion of Ice Microphysics in the NCAR Community Atmospheric Model Version 3 (CAM3) journal September 2007
Objective Determination of Cloud Heights and Radar Reflectivities Using a Combination of Active Remote Sensors at the ARM CART Sites journal May 2000
Representation of Clouds in Large-Scale Models journal November 1993
Cloud resolving simulations of Arctic stratus journal April 1999
Modeling clouds observed at SHEBA using a bulk microphysics parameterization implemented into a single-column model journal January 2003
First Results from the Alliance Icing Research Study II conference June 2012
Ice properties of single-layer stratocumulus during the Mixed-Phase Arctic Cloud Experiment: 1. Observations journal January 2007
Cirrus Cloud Microphysical Property Retrieval Using Lidar and Radar Measurements. Part II: Midlatitude Cirrus Microphysical and Radiative Properties journal July 2002
Representation of Clouds and Precipitation Processes in the Community Atmosphere Model Version 3 (CAM3) journal June 2006
Ice properties of single-layer stratocumulus during the Mixed-Phase Arctic Cloud Experiment: 2. Model results journal January 2007
Impact of a revised convective triggering mechanism on Community Atmosphere Model, Version 2, simulations: Results from short-range weather forecasts journal January 2004
Evaluation of a new mixed-phase cloud microphysics parameterization with CAM3 single-column model and M-PACE observations: CLOUD MICROPHYSICS PARAMETERIZATION journal December 2007
Can Ice-Nucleating Aerosols Affect Arctic Seasonal Climate? journal April 2007
Diagnosis of Community Atmospheric Model 2 (CAM2) in numerical weather forecast configuration at Atmospheric Radiation Measurement sites journal January 2005
Thermodynamik der Atmosphäre book January 1926
Year on ice gives climate insights journal January 1999
Evaluating Parameterizations in General Circulation Models: Climate Simulation Meets Weather Prediction journal December 2004
Surface Heat Budget of the Arctic Ocean journal February 2002
Cloud-radiation feedbacks in a general circulation model and their dependence on cloud modelling assumptions journal April 1992
A Comparison of the CCM3 Model Climate Using Diagnosed and Predicted Condensate Parameterizations journal July 1998
Validation and Sensitivities of Frontal Clouds Simulated by the ECMWF Model journal October 1999
Testing Mixed-Phase Cloud Water Vapor Parameterizations with SHEBA/FIRE–ACE Observations journal August 2004
Ice forming nuclei in the high Arctic journal January 1996
A modified formulation of fractional stratiform condensation rate in the NCAR Community Atmospheric Model (CAM2) journal January 2003
Relative Humidity in Liquid, Mixed-Phase, and Ice Clouds journal November 2006
Diagnosis of the summertime warm and dry bias over the U.S. Southern Great Plains in the GFDL climate model using a weather forecasting approach: GFDL CLIMATE MODEL SUMMERTIME BIAS journal September 2006
Possible Aerosol Effects on Ice Clouds via Contact Nucleation journal February 2002
Simulations of midlatitude frontal clouds by single-column and cloud-resolving models during the Atmospheric Radiation Measurement March 2000 cloud intensive operational period journal January 2005

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