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Mixed-precision for linear solvers in global geophysical flows
Semi-implicit (SI) time-stepping schemes for atmosphere and ocean models require elliptic solvers that work efficiently on modern supercomputers. This paper reports our study of...- publication PDF
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Thermospheric basis functions for improved dynamic calibration of...
State-of-the-art satellite drag models require upgrades to meet operational Precision Orbit Determination requirements for collision avoidance, reentry predictions and catalog...- publication PDF
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An Evaluation of the Rosemount Ice Detector for Aircraft Hazard Warning and...
This report presents an evaluation of the Rosemount 871 ice detector for use as an aircraft hazard instrument and for determining liquid undercooled water content. Ice detector...- publication PDF
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Seasonally resolved distributional trends of North American temperatures...
There is considerable interest in determining whether recent changes in the temperature distribution extend beyond simple shifts in the mean. The authors present a framework...- publication PDF
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A radar reflectivity operator with ice-phase hydrometeors for variational...
A reflectivity forward operator and its associated tangent linear and adjoint operators (together named Radar-Var) were developed for variational data assimilation (DA)....- publication PDF
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The role of radiation in accelerating tropical cyclogenesis in idealized simulations
Recent numerical modeling studies indicate the importance of radiation in the transformation from a tropical disturbance to a tropical depression, a process known as tropical...- publication PDF
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Does increased horizontal resolution Improve hurricane wind forecasts?
The representation of tropical cyclone track, intensity, and structure in a set of 69 parallel forecasts performed at each of two horizontal grid increments with the Advanced...- publication PDF
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Positioning infrastructure and technologies for low-carbon urbanization
The expected urbanization of the planet in the coming century coupled with aging infrastructure in developed regions, increasing complexity of man-made systems, and pressing...- publication PDF
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Generation of turbulence through frontogenesis in sheared stratified flows
The large-scale structures in the ocean and the atmosphere are in geostrophic balance, and a conduit must be found to channel the energy to the small scales where it can be...- publication PDF
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Joule heating and nitric oxide in the thermosphere
The effect of Joule heating on the density of nitric oxide in the thermosphere was studied using observations from the Student Nitric Oxide Explorer (SNOE) satellite and model...- publication PDF
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The impact of raindrop collisional processes on the polarimetric radar variables
The impact of the collisional warm-rain microphysical processes on the polarimetric radar variables is quantified using a coupled microphysics–electromagnetic scattering model....- publication PDF
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Examining the impacts of great lakes temperature perturbations on simulated...
Most inland water bodies are not resolved by general circulation models, requiring that lake surface temperatures be estimated. Given the large spatial and temporal variability...- publication PDF
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A User's Guide to PIKAIA 1.0
This user's guide, organized with a very brief review of the biological evolutionary process relevant to the understanding of genetic algorithms. While Chapter 2 is concerned...- publication PDF
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Composition changes after the "Halloween" solar proton event: The High...
We have compared composition changes of NO, NO₂, H₂O₂, O₃, N₂O, HNO₃, N₂O₅, HNO₄, ClO, HOCl, and ClONO₂ as observed by the Michelson Interferometer for Passive Atmospheric...- publication PDF
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Characterizing CO and NOy sources and relative ambient ratios in the...
Modeled source attribution information from the Community Multiscale Air Quality model was coupled with ambient data from the 2011 Deriving Information on Surface conditions...- publication PDF
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Stochastic simulation of streamflow and spatial extremes: A continuous,...
Stochastically generated streamflow time series are used for various water management and hazard estimation applications. They provide realizations of plausible but as yet...- publication PDF
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Diffusional and accretional growth of water drops in a rising adiabatic...
A large set of rising adiabatic parcel simulations is executed to investigate the combined diffusional and accretional growth of cloud droplets in maritime and continental...- publication PDF
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Solar EUV and XUV energy input to thermosphere on solar rotation time scales...
Solar radiation below ~100 nm produces photoelectrons, a substantial portion of the F region ionization, most of the E region ionization, and drives chemical reactions in the...- publication PDF
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Climatology of velocity and temperature turbulence statistics determined...
The climatology of the spatial structure functions of velocity and temperature for various altitudes (pressure levels) and latitude bands is constructed from the global...- publication PDF
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Intercontinental transport of anthropogenic sulfur dioxide and other...
Using 3 years worth of IASI (the Infrared Atmospheric Sounder Interferometer aboard METOP-A) measurements, we have identified 24 major events of uplift and transport of...- publication PDF
