-
Why do models overestimate surface ozone in the Southeast United States?
Ozone pollution in the Southeast US involves complex chemistry driven by emissions of anthropogenic nitrogen oxide radicals (NOx = NO + NO2) and biogenic isoprene. Model...- publication PDF
-
A neural network model of three-dimensional dynamic electron density in the...
A plasma density model of the inner magnetosphere is important for a variety of applications including the study of wave-particle interactions, and wave excitation and...- publication PDF
-
Convective updraft and downdraft characteristics of continental mesoscale...
The "gray zone" of convective modeling is defined as the range of horizontal grid spacings (Delta x) at which turbulent transport processes are only partially resolved by the...- publication PDF
-
Statistical study of the storm time radiation belt evolution during Van...
Coronal mass ejection (CME)-driven or corotating interaction region (CIR)-driven storms can change the electron distributions in the radiation belt dramatically, which can in...- publication PDF
-
Atmospheric circulation trends, 1950-2000: Relative roles of sea surface...
The relative roles of direct atmospheric radiative forcing (due to observed changes in well-mixed greenhouse gases, tropospheric and stratospheric ozone, sulfate and volcanic...- publication PDF
-
Observational constraints on atmospheric and oceanic cross-equatorial heat...
Satellite based top-of-atmosphere (TOA) and surface radiation budget observations are combined with mass corrected vertically integrated atmospheric energy divergence and...- publication PDF
-
Reframing future risks of extreme heat in the United States
The goal of this study is to reframe the analysis and discussion of extreme heat projections to improve communication of future extreme heat risks in the United States. We...- publication PDF
-
A Three-demiensional Variational (3DVAR) Data Assimilation System for Use With MM5
This report describes the three-dimensional variational (3DVAR) data assimilation system designed and built in the MMM Division of NCAR for use with the MM5 modeling system....- publication PDF
-
Evaluation of aerosol distribution and optical depth in the Geophysical...
This study evaluates the strengths and weaknesses of aerosol distributions and optical depths that are used to force the GFDL coupled climate model CM2.1. The concentrations of...- publication PDF
-
Development of a polar stratospheric cloud model within the Community Earth...
To simulate polar stratospheric clouds (PSCs) during the Antarctic winter of 2010, we have developed a PSC model within the Community Earth System Model framework that includes...- publication PDF
-
In situ balloon-borne ice particle imaging in high-latitude cirrus
Cirrus clouds reflect incoming solar radiation, creating a cooling effect. At the same time, these clouds absorb the infrared radiation from the Earth, creating a greenhouse...- publication PDF
-
An improved trajectory model to evaluate the collection performance of snow gauges
Recent studies have used numerical models to estimate the collection efficiency of solid precipitation gauges when exposed to the wind in both shielded and unshielded...- publication PDF
-
Climate system response to external forcings and climate change projections in CCSM4
Results are presented from experiments performed with the Community Climate System Model, version 4 (CCSM4) for the Coupled Model Intercomparison Project phase 5 (CMIP5). These...- publication PDF
-
A comparison between the 4DVAR and the ensemble Kalman filter techniques for...
A four-dimensional variational data assimilation (4DVAR) algorithm is compared to an ensemble Kalman filter (EnKF) for the assimilation of radar data at the convective scale....- publication PDF
-
Quiet-time day-to-day variability of equatorial vertical E × B drift from...
Ionospheric day-to-day variability is ubiquitous, even under undisturbed geomagnetic and solar conditions. In this paper, quiet-time day-to-day variability of equatorial...- publication PDF
-
Air pollution and associated human mortality: The role of air pollutant...
Increases in surface ozone (O₃) and fine particulate matter (≤2.5 μm aerodynamic diameter, PM2.5) are associated with excess premature human mortalities. We estimate changes in...- publication PDF
-
Thermodynamic control of anvil cloud amount
General circulation models show that as the surface temperature increases, the convective anvil clouds shrink. By analyzing radiative–convective equilibrium simulations, we show...- publication PDF
-
Modeling sustainability: Population, inequality, consumption, and...
Over the last two centuries, the impact of the Human System has grown dramatically, becoming strongly dominant within the Earth System in many different ways. Consumption,...- publication PDF
-
Improving canopy processes in the Community Land Model version 4 (CLM4)...
The Community Land Model version 4 (CLM4) overestimates gross primary production (GPP) compared with data-driven estimates and other process models. We use global, spatially...- publication PDF
-
Mesh refinement
We study mesh refinement techniques for first-order hyperbolic equations. A refinement method for use with the leap-frog scheme is defined and its stability established. The...- publication PDF
