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Empirical localization of observations for serial ensemble Kalman filter...
The empirical localization algorithm described here uses the output from an observing system simulation experiment (OSSE) and constructs localization functions that minimize the...- publication PDF
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Coordinated unmanned aircraft system (UAS) and ground-based weather...
Concentrations of airborne chemical and biological agents from a hazardous release are not spread uniformly. Instead, there are regions of higher concentration, in part due to...- publication PDF
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Tropical cyclone motion in a changing climate
The locally accumulated damage by tropical cyclones (TCs) can intensify substantially when these cyclones move more slowly. While some observational evidence suggests that TC...- publication PDF
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The influence of the synoptic regime on stable water isotopes in...
The correct derivation of paleotemperatures from ice cores requires exact knowledge of all processes involved before and after the deposition of snow and the subsequent...- publication PDF
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Spatiotemporal variability and predictability of relative humidity over West...
Spatial and temporal variability of relative humidity over the West African monsoon (WAM) region is investigated. In particular, the variability during the onset and retreat...- publication PDF
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An Arctic hydrologic system in transition: Feedbacks and impacts on...
The pace of change in the arctic system during recent decades has captured the world's attention. Observations and model simulations both indicate that the arctic experiences an...- publication PDF
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Stratospheric ozone chemistry feedbacks are not critical for the...
The Community Earth System Model-Whole Atmosphere Community Climate Model (CESM1-WACCM) is used to assess the importance of including chemistry feedbacks in determining the...- publication PDF
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Large contribution of biomass burning emissions to ozone throughout the...
Ozone is the third most important anthropogenic greenhouse gas after carbon dioxide and methane but has a larger uncertainty in its radiative forcing, in part because of...- 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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Mean biases, variability, and trends in air-sea fluxes and sea surface...
Air–sea fluxes from the Community Climate System Model version 4 (CCSM4) are compared with the Coordinated Ocean-Ice Reference Experiment (CORE) dataset to assess present-day...- publication PDF
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Nighttime secondary ozone layer during major stratospheric sudden warmings...
A major stratospheric sudden warming (SSW) strongly impacts the entire middle atmosphere up to the thermosphere. Currently, the role of atmospheric dynamics on polar ozone in...- publication PDF
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On determining stationary periods within time series
A novel approach is constructed for determining both the occurrence and the duration of stationary periods within time series. After reviewing four statistical techniques that...- publication PDF
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Small-scale wind fluctuations in the tropical tropopause layer from aircraft...
The contribution of turbulent mixing to heat and tracer transport in the tropical tropopause layer (TTL) is poorly constrained, partly owing to a lack of direct observations....- publication PDF
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A spatiotemporal assessment of extreme cold in northwestern North America...
Two large volcanic eruptions contributed to extreme cold temperatures during the early 1800s, one of the coldest phases of the Little Ice Age. While impacts from the massive...- publication PDF
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Mesospheric wind disturbances due to gravity waves near the Antarctica Peninsula
Based on austral winter mesospheric wind observations from three closely deployed Antarctic Peninsula stations (King George Island, Palmer, and Rothera), mesospheric wind...- publication PDF
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Nitrous acid (HONO) during polar spring in Barrow, Alaska: A net source of...
HONO was measured by a LOPAP instrument (LOng Path Absorption Photometer) for one month during the OASIS spring 2009 campaign in Barrow, Alaska. HONO concentrations between ≤...- publication PDF
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Revising the ensemble-based Kalman filter covariance for the retrieval of...
Previous studies have demonstrated that soil moisture in the top layers (e.g., within the top 1-m depth) can be retrieved by assimilating near-surface soil moisture observations...- publication PDF
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A construction of pseudo salinity profiles for the global ocean: Method and...
This study demonstrates a reconstruction of salinity profiles for the global ocean for the period 1993 - 2008. All available temperature-salinity (T-S) profiles from the Global...- publication PDF
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Diagnosis of the marine low cloud simulation in the NCAR community earth...
We present a diagnostic analysis of the marine low cloud climatology simulated by two state-of-the-art coupled atmosphere–ocean models: the National Center for Atmospheric...- publication PDF
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A method for adaptive habit prediction in bulk microphysical models. Part...
Arctic mixed-phase clouds are ubiquitous, and the persistence of supercooled liquid is not well understood. Prior studies of mixed-phase clouds predict a single axis length...- publication PDF
