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Solar spectral lines with special polarization properties for the...
We investigate atomic transitions that have previously been identified as having zero polarization from the Zeeman effect. Our goal is to identify spectral lines that can be...- publication PDF
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On the possible interaction between internal climate variability and forced...
The global warming hiatus does not necessarily mean a hiatus in anthropogenic greenhouse gas forcing and forced climate change (FCC). Here we show that both Atlantic...- publication PDF
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The cascade of global trade to large climate forcing over the Tibetan...
Black carbon (BC) aerosols constitute unique and important anthropogenic climate forcers that potentially accelerate the retreat of glaciers over the Himalayas and Tibetan...- publication PDF
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Polarization lidar operation for measuring backscatter phase matrices of...
We describe implementation and demonstration of a polarization technique adapted for lidar to measure all unique elements of the volume backscatter phase matrix. This capability...- publication PDF
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Impacts of ENSO on air-sea oxygen exchange: Observations and mechanisms
Models and observations of atmospheric potential oxygen (APO similar or equal to O-2 + 1.1 * CO2) are used to investigate the influence of El Nino-Southern Oscillation (ENSO) on...- publication PDF
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Better calibration of cloud parameterizations and subgrid effects increases...
Realistic simulation of the Earth's mean-state climate remains a major challenge, and yet it is crucial for predicting the climate system in transition. Deficiencies in models'...- publication PDF
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Seasonal forecasts of tropical cyclones using GFDL SPEAR and HiFLOR-S
The seasonal prediction skill of tropical cyclone (TC) activity is evaluated using the Seamless System for Prediction and Earth System Research (SPEAR), a modeling system...- publication PDF
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Heating of the sunlit polar cap ionosphere by reflected photoelectrons
Photoelectrons escape from the ionosphere on sunlit polar cap field lines. In order for those field lines to carry zero current without significant heavy ion outflow or cold...- publication PDF
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Using the artificial tracer e90 to examine present and future UTLS tracer...
Large-scale tracer transport in the upper troposphere and lower stratosphere (UTLS) is investigated using simulations of the Whole Atmosphere Community Climate Model (WACCM)...- publication PDF
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National Center for Atmospheric Research storage accounting and analysis...
While most high-performance computing system operators diligently track computing usage and utilization on a job-by-job basis, far fewer sites have implemented mechanisms for...- publication PDF
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On the Southern Hemisphere stratospheric response to ENSO and its impacts on...
As the leading mode of Pacific variability, El Nino-Southern Oscillation (ENSO) causes vast and wide-spread climatic impacts, including in the stratosphere. Following discovery...- publication PDF
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Data generated during the 2018 LAPSE-RATE campaign: An introduction and overview
Unmanned aircraft systems (UASs) offer innovative capabilities for providing new perspectives on the atmosphere, and therefore atmospheric scientists are rapidly expanding their...- publication PDF
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Synthesis of results from the North American Monsoon Experiment (NAME) Process Study
An international team of scientists from the United States, Mexico, and Central America carried out a major field campaign during the summer of 2004 to develop an improved...- publication PDF
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Longitudinal variations of nighttime electron auroral precipitation in both...
Using 6 years of Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) global ultraviolet imager auroral observations in both hemispheres, we have studied the...- publication PDF
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Proceedings of the 2023 Improving Scientific Software Conference
The Software Engineering Assembly (SEA) is a loosely structured group of software engineers and scientists who write scientific software, mostly but not only at NCAR and mostly...- publication PDF
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An ERA5 climatology of synoptic-scale negative potential vorticityâjet...
Abstract. Recent numerical modeling and theoretical work deduce that potential vorticity (PV) can turn negative in the Northern Hemisphere as a result of localized convective...- publication PDF
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Effect of increasing CO2 on the terrestrial carbon cycle
Feedbacks from the terrestrial carbon cycle significantly affect future climate change. The CO2 concentration dependence of global terrestrial carbon storage is one of the...- publication PDF
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On methods for assessment of the value of observations in...
In numerical weather prediction (NWP), a large number of observations are used to create initial conditions for weather forecasting through a process known as data assimilation....- publication PDF
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A computationally compact representation of Magnetic-Apex and Quasi-Dipole...
Many structural and dynamical features of the ionized and neutral upper atmosphere are strongly organized by the geomagnetic field, and several magnetic coordinate systems have...- publication PDF
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Synthesis of the land carbon fluxes of the Amazon region between 2010 and 2020
The Amazon is the largest continuous tropical forest in the world and plays a key role in the global carbon cycle. Human-induced disturbances and climate change have impacted...- publication PDF
