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Jet alignment in a two-layer quasigeostrophic channel using one-dimensional...
Because of position errors traditional methods of data assimilation can broaden and weaken jets or other flow structures leading to reduced forecast skill. Here a technique to...- publication PDF
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An approach of radar reflectivity data assimilation and its assessment with...
A radar reflectivity data assimilation scheme was developed within the fifth-generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model...- publication PDF
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Raindrop size distribution and rain characteristics during the 2013 great...
Drop size distributions observed by four Particle Size Velocity (PARSIVEL) disdrometers during the 2013 Great Colorado Flood are used to diagnose rain characteristics during...- publication PDF
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Spatial Coherence Retrievals of Cloud Properties for the Fire Marine...
The purpose of this note is to provide "quick look" satellite retrievals of cloud properties for the FIRE Marine Stratus IFO, June 29- July 19, 1987. It is hoped that this quick...- publication PDF
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Tornado maintenance investigated with high-resolution Dual-Doppler and EnKF analysis
Dual-Doppler wind synthesis and ensemble Kalman filter analyses produced by assimilating Doppler-on-Wheels velocity data collected in four tornadic supercells are examined in...- publication PDF
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An update on the uncertainties of water vapor measurements using cryogenic...
Long time series of observations of essential climate variables in the troposphere and stratosphere are often impacted by inconsistencies in instrumentation and ambiguities in...- publication PDF
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Determining the origin of tidal oscillations in the ionospheric transition...
At high-latitudes, diurnal and semidiurnal variations of temperature and neutral wind velocity can originate both in the lower atmosphere (UV or infrared absorption) and in the...- publication PDF
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Sources of error in dual-wavelength radar remote sensing of cloud liquid...
Dual-wavelength ratio (DWR) techniques offer the prospect of producing high-resolution mapping of cloud microphysical properties, including retrievals of cloud liquid water...- publication PDF
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On how hot towers fuel the Hadley cell: An observational and modeling study...
An airflow trajectory analysis was carried out based on an idealized numerical simulation of the nocturnal 9 February 1993 equatorial oceanic squall line observed over the...- publication PDF
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Gamma distribution parameters for cloud drop distributions from...
The liquid water content and drop diameters in supercooled clouds have been measured since the 1940s at the summit of Mount Washington in New Hampshire using a rotating...- publication PDF
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Can the salt-advection feedback be detected in internal variability of the...
Evidence for the assumptions of the salt-advection feedback in box models is sought by studying the Atlantic meridional overturning circulation (AMOC) internal variability in...- publication PDF
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Continental-scale temperature variability in PMIP3 simulations and PAGES 2k...
Estimated external radiative forcings, model results, and proxy-based climate reconstructions have been used over the past several decades to improve our understanding of the...- publication PDF
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Seasonal sensitivity of the northern hemisphere jet streams to Arctic...
Near-surface Arctic warming has been shown to impact the midlatitude jet streams through the use of carefully designed model simulations with and without Arctic sea ice loss. In...- publication PDF
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Assimilation of GNSS PWV with NCAR-RTFDDA to improve prediction of a landfall typhoon
Precipitable water vapor (PWV) retrieved from ground-based global navigation satellite system (GNSS) stations acquisition signal of a navigation satellite system provides high...- publication PDF
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Strength Characteristics of Grace Cryovac YH Polypropylene Film
This report is part of a series prepared for the Materials Research Project of the NCAR Scientific Balloon Facility in order to extend the reliability and capabilities of...- publication PDF
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Comparing surface and stratospheric impacts of geoengineering with different...
Geoengineering with stratospheric sulfate aerosols can, to some extent, be designed to achieve different climate objectives. Here we use the state‐of‐the‐art Community Earth...- publication PDF
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Parameterization of generalized cloud overlap for radiative calculations in...
New radiative parameterizations have been developed for the National Center for Atmospheric Research (NCAR) Community Atmospheric Model (CAM). The CAM is the next version of the...- publication PDF
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Spectropolarimetric evidence for a siphon flow along an emerging magnetic flux tube
We study the dynamics and topology of an emerging magnetic flux concentration using high spatial resolution spectropolarimetric data acquired with the Imaging Magnetograph...- publication PDF
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A comparison of plot-based satellite and Earth system model estimates of...
Net primary production (NPP) by plants represents the largest annual flux of carbon dioxide (CO₂) from the atmosphere to the terrestrial biosphere, playing a critical role in...- publication PDF
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An observationally based constraint on the water-vapor feedback
The increase in atmospheric concentrations of water vapor with global warming is a large positive feedback in the climate system. Thus, even relatively small errors in its...- publication PDF
