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Collaborative research at the intersection of weather and climate
Fundamental barriers to advancing weather and climate diagnosis and prediction on time-scales from days to years are partly attributable to gaps in knowledge and the limited...- publication PDF
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Wind and temperature effects on thermosphere mass density response to the...
A unique conjunction of the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) and the Challenging Minisatellite Payload (CHAMP) satellites provided simultaneous...- publication PDF
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An adjoint sensitivity-based data assimilation method and its comparison...
An adjoint sensitivity-based data assimilation (ASDA) method is proposed and applied to a heavy rainfall case over the Korean Peninsula. The heavy rainfall case, which occurred...- publication PDF
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Possible influence of extreme magnetic storms on the thermosphere in the...
Solar and interplanetary events can create extreme magnetic storms, such as the Carrington storm in 1859 with intensity up to Dst similar to -1,760 nT. The influence of an...- publication PDF
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WACCM simulations of the mean circulation and trace species transport in the...
Downwelling of air in the high latitude winter middle atmosphere causes perturbations in chemical composition. Species with sources in the mesosphere and lower thermosphere,...- publication PDF
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Planning for the 1980's / Proceedings of the First Annual Computer Users Conference
The proceedings of the conference are included in this technical report. Some papers prepared for the conference were included in a preconference distribution. Dr. Macintyre's...- publication PDF
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Impact of Ural blocking on winter warm Arctic--cold Eurasian anomalies. Part...
In Part I of this study, the impact of Ural blocking (UB) on the warm Arcticâcold Eurasian (WACE) pattern associated with the winter (DJF) arctic sea ice loss during 1979-2013...- publication PDF
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Investigating controls on sea ice algal production using E3SMv1.1-BGC
We present the analysis of global sympagic primary production (PP) from 300 years of pre-industrial and historical simulations of the E3SMv1.1-BGC model. The model includes a...- publication PDF
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Thermal vortex ring: Vortex-dynamics analysis of a high-resolution simulation
A high-resolution simulation of a thermal vortex ring is analysed from the point of view of the vortex dynamics. A power-spectrum analysis of vortex-ring sections suggests that...- publication PDF
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A new and inexpensive non-bit-for-bit solution reproducibility test based on...
A test procedure is proposed for identifying numerically significant solution changes in evolution equations used in atmospheric models. The test issues a "fail" signal when any...- publication PDF
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Using multisource satellite data to assess recent snow-cover variability and...
Snow cover in the Qinghai-Tibet Plateau (QTP) is a critical component in the water cycle and regional climate of East Asia. Fractional snow cover (FSC) derived from five...- publication PDF
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Outcomes and lessons learned from implementing a Diversity, Equity, and...
Atmospheric science is male dominated and few students of color matriculate into the field, a trend dating back at least 50 years. UCAR/NCAR Equity and Inclusion (referred to as...- publication PDF
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OMIP contribution to CMIP6: Experimental and diagnostic protocol for the...
The Ocean Model Intercomparison Project (OMIP) is an endorsed project in the Coupled Model Intercomparison Project Phase 6 (CMIP6). OMIP addresses CMIP6 science questions,...- publication PDF
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High-resolution hurricane forecasts
Widely varying scales of atmospheric motion make it extremely difficult to predict hurricane intensity even after decades of research. A new model capable of resolving a...- publication PDF
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Simulation of present day and twenty-first-century energy budgets of the...
The energy budget of the modern-day Southern Hemisphere is poorly simulated in both state-of-the-art reanalyses and coupled global climate models. The ocean-dominated Southern...- publication PDF
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A simple analytical model of the nocturnal low-level jet over the Great...
A simple analytical model including both diurnal thermal forcing over sloping terrain (the "Holton" mechanism) and diurnally varying boundary layer friction (the "Blackadar"...- publication PDF
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Toward reliable ensemble Kalman filter estimates of COâ fluxes
The use of ensemble filters for estimating sources and sinks of carbon dioxide (COâ) is becoming increasingly common, because they provide a relatively computationally...- publication PDF
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Separation of methane emissions from agricultural and natural gas sources in...
This proof-of-concept study demonstrates that methane (CH4) emissions from natural gas (NG) and agriculture can be disentangled using the concept of excess column observations....- publication PDF
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Decadal variability in the northeast Pacific in a physical-ecosystem model:...
A basin-wide interdecadal change in both the physical state and the ecology of the North Pacific occurred near the end of 1976. Here we use a physical-ecosystem model to examine...- publication PDF
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Changes in moisture flux over the Tibetan Plateau during 1979-2011 and...
Changes in moisture as represented by P -- E (precipitation -- evapotranspiration) and the possible causes over the Tibetan Plateau (TP) during 1979-2011 are examined based on...- publication PDF
