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Measurements and modeling of contemporary radiocarbon in the stratosphere
Measurements of the 14C content of carbon dioxide in air collected by high-altitude balloon flights in 2003-2005 reveal the contemporary radiocarbon distribution in the northern...- publication PDF
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A sediment trap evaluation of B/Ca as a carbonate system proxy in asymbiotic ...
The ratio of boron to calcium (B/Ca) in a subset of foraminifera has been shown to covary with seawater carbonate chemistry, making this geochemical signature a promising proxy...- publication PDF
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Effect of anomalous electron heating on the transpolar potential in the LFM g...
The tendency of global MHD models to overestimate the transpolar potential in simulations of strong geomagnetic storms and evidence of an adverse feedback of the ionospheric...- publication PDF
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An Overview of NCAR's Computing Environment
The Scientific Computing Division is charged with providing computing support for research conducted by NCAR staff and for extending the computing resources of university...- publication PDF
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Tropospheric waveguide teleconnections and their seasonality
One-point correlation maps of the subseasonal variability of 200-hPa meridional wind in nature and an atmospheric general circulation model are systematically analyzed to...- publication PDF
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Sq and EEJ—A review on the daily variation of the geomagnetic field caused by...
A record of the geomagnetic field on the ground sometimes shows smooth daily variations on the order of a few tens of nano teslas. These daily variations, commonly known as Sq,...- publication PDF
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Increased atmospheric vapor pressure deficit reduces global vegetation growth
Atmospheric vapor pressure deficit (VPD) is a critical variable in determining plant photosynthesis. Synthesis of four global climate datasets reveals a sharp increase of VPD...- publication PDF
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Exploratory high-resolution climate simulations using the Community Atmospher...
Extended, high-resolution (0.23° latitude × 0.31° longitude) simulations with Community Atmosphere Model versions 4 and 5 (CAM4 and CAM5) are examined and compared with results...- publication PDF
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Adjoint-derived observation impact using WRF in the western North Pacific
An increasing number of observations have contributed to the performance of numerical weather prediction systems. Accordingly, it is important to evaluate the impact of these...- publication PDF
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Decadal-interdecadal climate variability over Antarctica and linkages to the ...
The Antarctic continent contains the majority of the global ice volume and plays an important role in a changing climate. The nature and causes of Antarctic climate variability...- publication PDF
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Enhancing the student experience with Numerical Weather Prediction: Advantage...
University faculty joined the Developmental Testbed Center (DTC) for a live, virtual 3-day workshop to learn about the capabilities of the DTC’s containerized end-to-end NWP...- publication PDF
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Probabilistic evaluation of drought in CMIP6 simulations
As droughts have widespread social and ecological impacts, it is critical to develop long-term adaptation and mitigation strategies to reduce drought vulnerability. Climate...- publication PDF
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Convective momentum transport by rainbands within a Madden–Julian oscillation...
The convective momentum transport (CMT) properties of 13 215 rainbands within a Madden-Julian oscillation (MJO) event simulated by a global nonhydrostatic model are examined....- publication PDF
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An automated velocity dealiasing scheme for radar data observed from typhoons...
Accurate and automated dealiasing of radar data is important for data interpretation and downstream applications such as numerical weather prediction (NWP) models. In this paper...- publication PDF
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Comparison of six lightning parameterizations in CAM5 and the impact on globa...
We present simulations performed with six lightning parameterizations implemented in the Community Atmosphere Model (CAM5). The amount of lightning-produced nitrogen oxides...- publication PDF
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The role of boundary layer dynamics on the diurnal evolution of isoprene and ...
We investigate diurnal variability of isoprene and related chemical species in the Amazonian region. The dynamics and chemistry of an atmospheric boundary layer are studied with...- publication PDF
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Airborne flux measurements of methane and volatile organic compounds over the...
Emissions of methane (CH₄) and volatile organic compounds (VOCs) from oil and gas production may have large impacts on air quality and climate change. Methane and VOCs were...- publication PDF
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Application of Capon technique to mitigate bird contamination on a spaced ant...
A novel technique is developed for profiling radars to measure atmospheric wind fields when signals are contaminated by migrating birds. It exploits the idea of adaptive...- publication PDF
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Scaling carbon dioxide and water vapour exchange from leaf to canopy in a dec...
The scaling of CO2 and water vapour transfer from leaf to canopy dimensions was achieved by integrating mechanistic models for physiological (photosynthesis, stomatal...- publication PDF
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Processes driving seasonal variability in DMS, DMSP, and DMSO concentrations ...
This study presents new measurements of the concentrations and turnover rates of dimethyl sulfide (DMS), dimethylsulfoniopropionate (DMSP), and dimethyl sulfoxide (DMSO) in...- publication PDF