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A Comparison of Quasi-geostrophic and Primitive Equation Models for...
This report explains questions and builds upon previous findings on the comparison of quasi-geostrophic and primitive equation models for stratospheric sudden warming simulations.- publication PDF
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Evaluation of aerosol optical depths and clear-sky radiative fluxes of the...
Aerosol optical depths (AODs) used for the Edition 4.1 Clouds and the Earth's Radiant Energy System (CERES) Synoptic 1 degrees (SYN1deg) product are evaluated. AODs are derived...- publication PDF
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Is anthropogenic global warming accelerating?
Estimates of the anthropogenic effective radiative forcing (ERF) trend have increased by 50% since 2000 (from +0.4 W m(-2) decade(-1) in 2000-09 to +0.6 W m(-2) decade(-1) in...- publication PDF
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Alfvénic thermospheric upwelling in a global geospace model
Motivated by low-altitude cusp observations of small-scale (similar to 1 km) field-aligned currents (SSFACs) interpreted as ionospheric Alfven resonator modes, we have...- publication PDF
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Evaluation of regional isoprene emission factors and modeled fluxes in California
Accurately modeled biogenic volatile organic compound (BVOC) emissions are an essential input to atmospheric chemistry simulations of ozone and particle formation. BVOC emission...- publication PDF
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Secondary organic aerosol formation from semi- and intermediate-volatility...
The role of aqueous multiphase chemistry in the formation of secondary organic aerosol (SOA) remains difficult to quantify. We investigate it here by testing the rapid formation...- publication PDF
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Turbulence structure above a vegetation canopy
We compare the turbulence statistics of the canopy/roughness sublayer (RSL) and the inertial sublayer (ISL) above. In the RSL the turbulence is more coherent and more efficient...- publication PDF
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Climate change projections in CESM1(CAM5) compared to CCSM4
Future climate change projections for phase 5 of the Coupled Model Intercomparison Project (CMIP5) are presented for the Community Earth System Model version 1 that includes the...- publication PDF
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An observational study of a coastal barrier jet induced by a landfalling typhoon
In this study, the structure and evolution of a coastal barrier jet (CBJ) along the east coast of Taiwan is documented using operational Doppler radars. The formation of the CBJ...- publication PDF
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The product and system specificities of measuring curation impact
Using three datasets archived at the National Center for Atmospheric Research (NCAR), we describe the creation of a 'data usage index' for curation-specific impact assessments....- publication PDF
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Moving vortices on the sphere: A test case for horizontal advection problems
A new two-dimensional advection test on the surface of the sphere is proposed. The test combines a solid-body rotation and a deformational flow field to form moving vortices...- publication PDF
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Earth's atmosphere protects the biosphere from nearby supernovae
Geological evidence indicates that a supernova within 100 parsecs of Earth occurs around once per million years. Such nearby supernovas can produce an intense gamma-ray burst...- publication PDF
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Toward the application of decadal climate predictions
Decadal prediction is a relatively new branch of climate science that bridges the gap between seasonal climate forecasts and multidecadal-to-century projections of climate...- publication PDF
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An overview of the Amazonian Aerosol Characterization Experiment 2008 (AMAZE-08)
The Amazon Basin provides an excellent environment for studying the sources, transformations, and properties of natural aerosol particles and the resulting links between...- publication PDF
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Numerical simulations of two-layer flow past topography. Part I: The leeside...
Laboratory observations of the leeside hydraulic jump indicate it consists of a statistically stationary turbulent motion in an overturning wave. From the point of view of the...- publication PDF
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Observed hazards to aircraft in deep summertime convective clouds from 4-7 km
Data from flights by the South Dakota School of Mines and Technology's North American T-28 storm-penetrating aircraft during nine different research projects conducted between...- publication PDF
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A multi-site campaign to measure solar-like oscillations in Procyon. II....
We have analyzed data from a multi-site campaign to observe oscillations in the F5 star Procyon. The data consist of high-precision velocities that we obtained over more than...- publication PDF
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A bayesian approach for statisticalâphysical bulk parameterization of rain...
A new framework is proposed for the bulk parameterization of rain microphysics: the Bayesian Observationally Constrained Statistical-Physical Scheme (BOSS). It is designed to...- publication PDF
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NCAR General Circulation Model (GCM) History Tape Formats and Anomalies
This report serves as a common reference manual for General Circulation Model (GCM) personnel and outside interested parties. It specifically addresses development of, details...- publication PDF
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High resolution Dynamics Limb Sounder observations of polar stratospheric...
The High Resolution Dynamics Limb Sounder (HIRDLS) cloud detection and cloud top determination algorithm is described and applied to 2005-2007 HIRDLS radiance profiles....- publication PDF