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An observational study of the symmetric boundary layer structure and...
This study analyses Global Positioning System dropsondes to document the axisymmetric tropical cyclone (TC) boundary-layer structure, based on storm intensity. A total of 2608...- publication PDF
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Chemical sensing of plant stress at the ecosystem scale
Significant ecosystem-scale emissions of methylsalicylate (MeSA), a semivolatile plant hormone thought to act as the mobile signal for systemic acquired resistance (SAR), were...- publication PDF
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The equatorial Pacific cold tongue bias in CESM1 and its influence on ENSO forecasts
The mean-state bias and the associated forecast errors of the El Nino-Southern Oscillation (ENSO) are investigated in a suite of 2-yr-lead retrospective forecasts conducted with...- publication PDF
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Mid-latitude Thermosphere-Ionosphere Na (TINa) layers observed with...
We report the first lidar observations of regular occurrence of mid-latitude thermosphere-ionosphere Na (TINa) layers over Boulder (40.13 degrees N, 105.24 degrees W), Colorado....- 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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Numerical convergence of 2d solar convection in implicit large-eddy simulations
Large-eddy simulations (LES) and implicit LES (ILES) are wise and affordable alternatives to the unfeasible direct numerical simulations of turbulent flows at high Reynolds (Re)...- publication PDF
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Evaluation of landâatmosphere coupling processes and climatological bias...
This study investigates the performance of the latter NCEP Unified Forecast System (UFS) Coupled Model prototype simulations (P5-P8) during boreal summer 2011-17 in regard to...- publication PDF
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Measured and modeled trends of seven tropospheric pollutants in the high...
The long-term trends and seasonality of many tropospheric pollutants are not well characterized in the high Arctic due to a dearth of trace-gas measurements in this remote...- publication PDF
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Turbulence vertical structure of the boundary layer during the afternoon transition
We investigate the decay of planetary boundary layer (PBL) turbulence in the afternoon, from the time the surface buoyancy flux starts to decrease until sunset. Dense...- publication PDF
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Causes and climatic consequences of the impact winter at the...
Prolonged periods of low light and cold temperatures at Earth's surface are hypothesized effects of the end-Cretaceous asteroid impact. However, debate remains about the causes...- publication PDF
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Predicting the location of polar cusp in the Lyon-Fedder-Mobarry global...
In this paper we compare observations of the high-latitude cusp from DMSP data to simulations conducted using the Lyon-Fedder-Mobarry (LFM) global magnetosphere simulation. The...- publication PDF
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Taking the pulse of the planet
Humans have released carbon dioxide and other greenhouse gases in sufficient quantity to change the composition of the atmosphere (Figure 1). The result is an accumulation of...- publication PDF
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NCAR's real-time convection-allowing ensemble project
Beginning 7 April 2015, scientists at the U.S. National Center for Atmospheric Research (NCAR) began producing daily, real-time, experimental, 10-member ensemble forecasts with...- publication PDF
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Changes in stratospheric temperatures and their implications for changes in...
Seasonally and vertically resolved changes in the strength of the Brewer-Dobson circulation (BDC) were inferred using temperatures measured by the Microwave Sounding Unit (MSU),...- publication PDF
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North American climate in CMIP5 Experiments. Part I: Evaluation of...
This is the first part of a three-part paper on North American climate in phase 5 of the Coupled Model Intercomparison Project (CMIP5) that evaluates the historical simulations...- publication PDF
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Analog ensemble methods for improving satellite-based intensity estimates of...
Accurate, reliable estimates of tropical cyclone (TC) intensity are a crucial element in the warning and forecast process worldwide, and for the better part of 50 years,...- publication PDF
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Simulation of polar stratospheric clouds in the specified dynamics version...
We evaluate the simulation of polar stratospheric clouds (PSCs) in the Specified Dynamics version of the Whole Atmosphere Community Climate Model for the Antarctic winter 2005....- publication PDF
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Sources and regional attributions to upper troposphere nitrogen oxides...
This study investigates the sources and regional attributions of nitrogen oxides (NO x ) in the upper troposphere|upper tropospheric (UT) during the Asian Summer Monsoon (ASM)....- publication PDF
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Antarctic sea ice over the past 130â000 years â Part 1: A review of what...
Antarctic sea ice plays a critical role in the Earth system, influencing energy, heat and freshwater fluxes, air-sea gas exchange, ice shelf dynamics, ocean circulation,...- publication PDF
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Antarctic and Southern Ocean surface temperatures in CMIP5 models in the...
This study examines the biases, intermodel spread, and intermodel range of surface air temperature (SAT) across the Antarctic ice sheet and Southern Ocean in 26 structurally...- publication PDF
