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Kalman filter and analog schemes to post-process numerical weather predictions
Two new post-processing methods are proposed to reduce numerical-weather-prediction s systematic and random errors. The first method (ANKF) consists of running a post-processing...- publication PDF
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Dynamic variability of the Asian monsoon anticyclone observed in potential...
The Asian summer monsoon is associated with strong upward transport of tropospheric source gases and isolation of air within the upper tropospheric anticyclone, with a high...- publication PDF
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COSMIC-2 radio occultation constellation: First results
Initial data from the Formosa Satellite-7/Constellation Observing System for Meteorology Ionosphere and Climate (FORMOSAT-7/COSMIC-2, hereafter C2), a recently launched...- publication PDF
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An ensemble adjustment Kalman filter for the CCSM4 ocean component
The authors report on the implementation and evaluation of a 48-member ensemble adjustment Kalman filter (EAKF) for the ocean component of the Community Climate System Model,...- publication PDF
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Skillful prediction of multidecadal variations in volcanic forcing
Stratospheric sulfate injections from explosive volcanic eruptions are a primary natural climate forcing. Improved statistical models can now capture and simulate dynamical...- publication PDF
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A new process-based and scale-aware desert dust emission scheme for global...
Desert dust accounts for most of the atmosphere's aerosol burden by mass and produces numerous important impacts on the Earth system. However, current global climate models...- publication PDF
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Meteor radar measurements of MLT winds near the equatorial electro jet...
The All-Sky interferometric meteor (SKYiMET) radar (MR) derived winds in the vicinity of the equatorial electrojet (EEJ) are discussed. As Thumba (8.5° N, 77° E; dip lat. 0.5°...- publication PDF
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Bromine atom production and chain propagation during springtime Arctic ozone...
Ozone depletion events (ODEs) in the Arctic are primarily controlled by a bromine radical-catalyzed destruction mechanism that depends on the efficient production and recycling...- publication PDF
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Activation of cloud droplets in bin-microphysics simulation of shallow convection
This paper describes implementation of the warm-rain bin microphysics in a LES model based on the EULAG fluid flow solver. The binmicrophysics EULAG is applied to the case of...- publication PDF
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Modeling ionospheric super-fountain effect based on the coupled TIMEGCM-SAMI3
Recently, efforts have been undertaken to develop a coupled thermosphere-ionosphere-plasmasphere model based on two well-established models, namely, the Thermosphere-Ionosphere-...- publication PDF
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Soil moisture and hydrology projections of the permafrost region – a model...
This study investigates and compares soil moisture and hydrology projections of broadly used land models with permafrost processes and highlights the causes and impacts of...- publication PDF
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Trends of ozone total columns and vertical distribution from FTIR...
Ground-based Fourier transform infrared (FTIR) measurements of solar absorption spectra can provide ozone total columns with a precision of 2% but also independent partial...- publication PDF
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An improved representation of rimed snow and conversion to graupel in a...
This paper describes the development of a new multicomponent detailed bin ice microphysics scheme that predicts the number concentration of ice as well as the rime mass mixing...- publication PDF
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A large eddy simulation study of moist convection initiation over...
This study uses large eddy simulations to investigate processes of moist convection initiation (CI) over heterogeneous surface fluxes. Surface energy balance is imposed via a...- publication PDF
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Rural-to-urban labor migration, household livelihoods, and the rural...
Rural migration and its relationship to the rural environment have attracted increasing research interest in recent decades. Rural migration constitutes a key component of human...- publication PDF
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Thermospheric damping response to sheath-enhanced geospace storms
We show evidence that solar wind density enhancements and pressure pulses can lead to intense low-energy particle precipitation and an associated, but unexpected, damping of...- publication PDF
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Global Distribution of Total Cloud Cover and Cloud Type Amounts Over Land
This is the third of a series of atlases to result from a study of the global cloud climatology from ground-based observations. The first two atlases (NCAR/TN-201+STR and...- publication PDF
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Proceedings of the 2020 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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False alarms and close calls: A conceptual model of warning accuracy
The false alarm rate ( FAR) measures the fraction of forecasted events that did not occur, and it remains one of the key metrics for verifying National Weather Service (NWS)...- publication PDF
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An application of the immersed boundary method for recovering the...
This study develops an extension of a variational-based multiple-Doppler radar synthesis method to construct the three-dimensional wind field over complex topography. The...- publication PDF