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The NCAR Climate System Model, Version One*

Byron A. Boville, Peter R. Gent
1998 Journal of Climate  
The spinup procedure prior to a fully coupled integration is discussed. The fully coupled model has been run for 300 yr with no surface flux corrections in momentum, heat, or freshwater.  ...  The nonlocal boundary layer turbulent flux parameterization is an updated version of Holtslag and Boville (1993) , giving lower boundary layer depths and higher surface humidities.  ...  However, the wind-driven ocean circulation does not change much between the spinup and the fully coupled runs, because the atmospheric circulation is quite similar [see Boville and Hurrell (1998) and  ... 
doi:10.1175/1520-0442(1998)011<1115:tncsmv>;2 fatcat:tmjgagekhvckda4zmrmmpjvtza

A Comparison of Semi-Lagrangian and Eulerian Tropical Climate Simulations

David L. Williamson, Jerry G. Olson, Byron A. Boville
1998 Monthly Weather Review  
, just a thicker multilevel tropopause.  ...  A benefit to both approximations of the additional vertical resolution is a reduction of the tropical temperature bias compared to the NCEP reanalysis.  ...  W I L L I A M S O N E T A L . FIG. 5.  ... 
doi:10.1175/1520-0493(1998)126<1001:acosla>;2 fatcat:udqrqe2g3fc7bikj2cjdy65auy

A Comparison of the Atmospheric Circulations Simulated by the CCM3 and CSM1*

Byron A. Boville, James W. Hurrell
1998 Journal of Climate  
CCM3 is an atmospheric general circulation model that uses specified sea surface temperatures (SSTs) for a lower boundary condition.  ...  CSM1 is a coupled general circulation model in which the SSTs are determined as part of the simulation and CCM3 serves as the atmospheric component.  ...  (Boville and Gent 1998) .  ... 
doi:10.1175/1520-0442(1998)011<1327:acotac>;2 fatcat:2ieffzvu3jhkjf2rkbvxh7cbfq

Characteristics of stratosphere-troposphere exchange in a general circulation model

Philip W. Mote, James R. Holton, Byron A. Boville
1994 Journal of Geophysical Research  
layer of stratosphere-troposphere mixing, not at 16,818 MOTE ET AL.: STRATOSPHERE-TROPOSPHERE EXCHANGE IN A GCM  ...  Air and trace gases are exchanged between the stratosphere and the troposphere on a variety of scales; but general circulation models (GCMs) are tinable to represent the smaller scales.  ...  GCM; water vapor therefore poses a poten- tial problem in a GCM and a means of identifying the impor- tance of unresolved scales.  ... 
doi:10.1029/94jd00913 fatcat:3enbcxxrnbgrxiz2dkeieniuqi

Simulation of the Pinatubo aerosol cloud in general circulation model

Byron A. Boville, James R. Holton, Philip W. Mote
1991 Geophysical Research Letters  
Aerosol transported to the troposphere was dispersed within a few weeks into the Northern Hemisphere extratropics.  ...  although a small amount was transported episodically into the upper troposphere in association with convective disturbances.  ...  Doiron, A. Krueger, L. Walter, and C.  ... 
doi:10.1029/91gl02778 fatcat:2iava2gcbbdcfac22mndrl2p3u

Heating and Kinetic Energy Dissipation in the NCAR Community Atmosphere Model

Byron A. Boville, Christopher S. Bretherton
2003 Journal of Climate  
Byron Boville, NCAR, P. O. Box 3000, Boulder, CO 80307-3000.  ...  | DECEMBER 2003 BOVILLE AND BRETHERTON Heating and Kinetic Energy Dissipation in the NCAR Community Atmosphere BYRON A.  ... 
doi:10.1175/1520-0442(2003)016<3877:hakedi>;2 fatcat:i54vxbdwwjctdg4ykarc3fnwz4

A Numerical Simulation of the Two-Day Wave near the Stratopause

Varavut Limpasuvan, Conway B. Leovy, Yvan J. Orsolini, Byron A. Boville
2000 Journal of the Atmospheric Sciences  
Model experiments show that, for a prescribed initial wind condition with strong horizontal wind variation in the Tropics, inertial instability can trigger the two-day wave.  ...  The model results suggest that the observed disparity in the wavenumber-3 amplitude between the austral and boreal summers is a consequence of the difference in summer easterly jet strength.  ...  Takahashi and Boville (1992) presented a study of the quasi-biennial oscillation (QBO) using a similar mechanistic model based on a preliminary version of the NCAR Community Climate Model 2 (CCM2).  ... 
doi:10.1175/1520-0469(2000)057<1702:ansott>;2 fatcat:lide5uqcyzf2bjs2wrhzdoe7qe

A comparison of observed (Haloe) and modeled (CCM2) methane and stratospheric water vapor

Philip W. Mote, James R. Holton, James M. Russell, Byron A. Boville
1993 Geophysical Research Letters  
The CCM2 is a global spectral model that has a number of changes from previous NCAR models.  ...  It employs a semi-Lagrangian scheme for constituent transport and improved radiative, convective, and cloud parameterizations. A complete description may be found in Hack et al., 1992.  ...  Acknowledgments: We wish to thank Adrian Tuck for helpful comments on a preliminary version of the manuscript, and  ... 
doi:10.1029/93gl01764 fatcat:ou6fa6k5kncxtkub4smwep4yc4

The Large-Scale Effects of Flow over Periodic Mesoscale Topography

Wendell T. Welch, Piotr Smolarkiewicz, Richard Rotunno, Byron A. Boville
2001 Journal of the Atmospheric Sciences  
WELCH* Department of Geology and Geophysics, Yale University, New Haven, Connecticut PIOTR SMOLARKIEWICZ, RICHARD ROTUNNO, AND BYRON A.  ...  BOVILLE National Center for Atmospheric Research, + Boulder, Colorado (Manuscript received 6 October 1999, in final form 22 September 2000) ABSTRACT Airflow over two-dimensional sinusoidal mesoscale topography  ... 
doi:10.1175/1520-0469(2001)058<1477:tlseof>;2 fatcat:z3z4oofcsjbjvf3e5hnvyh33bq

Kinetic energy spectrum of horizontal motions in middle-atmosphere models

John N. Koshyk, Byron A. Boville, Kevin Hamilton, Elisa Manzini, Kiyotaka Shibata
1999 Journal of Geophysical Research  
a!.  ...  of a k -5/3 power law for KE in the mesosphere.  ...  (Note that the MACCM2 T42 and T106 mesospheric spectra are further truncated to T32 and T60 because they are affected by the excessive numerical dissipation discussed by Boville [1995] .)  ... 
doi:10.1029/1999jd900814 fatcat:rpcawzmg2raxzcamfunduelfy4

The Dynamical Simulation of the NCAR Community Climate Model Version 3 (CCM3)*

James W. Hurrell, James J. Hack, Byron A. Boville, David L. Williamson, Jeffrey T. Kiehl
1998 Journal of Climate  
A ϳ50% reduction in the magnitude of the zonally averaged westerly bias in the equatorial upper troposphere that plagued previous CCM versions can be attributed to a significantly improved tropical hydrologic  ...  A 15-yr integration in which the model is forced with observed monthly varying sea surface temperatures (SSTs) since 1979 is compared to coexisting observations.  ...  in the current simulation (Boville and Hurrell 1998) .  ... 
doi:10.1175/1520-0442(1998)011<1207:tdsotn>;2 fatcat:tvvurquhezbidlex47zq75pr34

A Characterization of Tropical Transient Activity in the CAM3 Atmospheric Hydrologic Cycle

Philip J. Rasch, Mark J. Stevens, Lucrezia Ricciardulli, Aiguo Dai, Andrew Negri, Robert Wood, Byron A. Boville, Brian Eaton, James J. Hack
2006 Journal of Climate  
The Community Atmosphere Model version 3 (CAM3) is the latest generation of a long lineage of general circulation models produced by a collaboration between the National Center for Atmospheric Research  ...  The model tends to produce maxima in precipitation and liquid water path that are a few hours earlier than that seen in the observations over both oceans and land.  ...  A general overview of the CAM3 is provided in Collins et al. (2006) . The formulation for the hydrologic cycle can be found in Boville et al. (2006) .  ... 
doi:10.1175/jcli3752.1 fatcat:c2finz2e3reotlajz7oswpgpim

Representation of Clouds and Precipitation Processes in the Community Atmosphere Model Version 3 (CAM3)

Byron A. Boville, Philip J. Rasch, James J. Hack, James R. McCaa
2006 Journal of Climate  
Parameterization changes between CCM3 and CAM2 introduced a significant cold bias at the tropical tropopause, resulting in a dry bias for stratospheric water vapor.  ...  As a result of these changes, the tropopause cold bias has been almost eliminated in CAM3.  ...  and Gent (1998) and Boville and Bretherton (2003) .  ... 
doi:10.1175/jcli3749.1 fatcat:apdszostxnbfhk7bc3dk3r6zxa

Characteristics of Atmospheric Transport Using Three Numerical Formulations for Atmospheric Dynamics in a Single GCM Framework

Philip J. Rasch, Danielle B. Coleman, Natalie Mahowald, David L. Williamson, Shian-Jiann Lin, Byron A. Boville, Peter Hess
2006 Journal of Climate  
The model behavior with a few short simulations with passive tracers is explored, and with much longer simulations of radon, SF 6 , ozone, a tracer designed to mimic some aspects of a biospheric source  ...  A neutral biosphere (NB) test case is used to explore issues of diurnal and seasonal rectification of a tracer with sources and sinks at the surface.  ...  representation of stratospheric dynamics (Boville and Cheng 1988; Rasch 1986 ).  ... 
doi:10.1175/jcli3763.1 fatcat:fs5wkquhirhexpu2fbfb45a3ie

Response of the NCAR Climate System Model to Increased CO2and the Role of Physical Processes

Gerald A. Meehl, William D. Collins, Byron A. Boville, Jeffrey T. Kiehl, T. M. L. Wigley, Julie M. Arblaster
2000 Journal of Climate  
It is a notable feature in the DOE model and some other global coupled models but does not occur in the CSM. The authors show that cloud responses are a major determining factor.  ...  However, a more important factor is the poleward ocean heat transport associated with changes in meridional overturning in the GIN Sea.  ...  A portion of this study was supported by the Office of Biological and Environmental Research, U.S. Department of Energy, as part of its Climate Change Prediction Program.  ... 
doi:10.1175/1520-0442(2000)013<1879:rotncs>;2 fatcat:tuz6gxxu7rbjjeosmy2wzjlk6y
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