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Dr. Hannah C Barnes is an expert in tropical convection, convective parameterizations, and radar observations. Her current research focuses on the development of the Grell-Freitas Convective Parameterization. Additional research activities done by Dr. Barnes includes supporting other model physics developers by creating model validation scripts. Dr. Barnes' previous research focused on using radar observations to understand convection and is an expert in mesoscale convective systems.
April 2019 - present
Cooperative Institute for Research in Environmental Sciences at the University of Colorado Boulder
- I work to improve the representation of convection within the Grell-Freitas Cumulus Parameterization (GF). Specifically, I am adding a method to estimate number concentrations and to develop a method to foster convective advection in the GF.
April 2018 - April 2019
- PostDoc Position
- I work with the Model Development Branch to improve the representation of convection within the Grell-Freitas Cumulus Parameterization.
September 2016 - March 2018
- PostDoc Position
- My work proposes theoretical explanation for the relationship between vertical velocity and the vertical distribution of hydrometeors within deep tropical convection.
This study examines Kelvin-Helmholtz (KH) waves observed by dual-polarization radar in several precipitating midlatitude cyclones during the Olympic Mountains Experiment (OLYMPEX) field campaign along the windward side of the Olympic Mountains in Washington State and in a strong stationary frontal zone in Iowa during the Iowa Flood Studies (IFloodS...
The Olympic Mountains Experiment (OLYMPEX) took place during the 2015/16 fall–winter season in the vicinity of the mountainous Olympic Peninsula of Washington State. The goals of OLYMPEX were to provide physical and hydrologic ground validation for the U.S.–Japan Global Precipitation Measurement (GPM) satellite mission and, more specifically, to st...
To equitably compare the spatial pattern of ice microphysical processes produced by three microphysical parameterizations with each other, observations, and theory, simulations of tropical oceanic mesoscale convective systems (MCSs) in the Weather Research and Forecasting (WRF) model were forced to develop the same mesoscale circulations as observa...
The Tropical Rainfall Measurement Mission's Spectral Latent Heating algorithm shows the contributions of different forms of convection to the latent heating profiles of the Madden-Julian Oscillation over the central Indian and West Pacific Oceans. In both oceanic regions, storms containing broad stratiform regions produce increased upper-level heat...
Composite analysis of mature near-equatorial oceanic mesoscale convective systems (MCSs) during the active stage of the Madden-Julian Oscillation (MJO) show where different hydrometeor types occur relative to convective updraft and stratiform midlevel inflow layers. The National Center for Atmospheric Research (NCAR) S-PolKa radar observed these MC...
 The variability of the precipitating cloud population of the Madden-Julian Oscillation (MJO) is represented by statistics of echo features seen by the Tropical Rainfall Measuring Mission's Precipitation Radar over the central Indian and west Pacific Oceans. Echo features include isolated shallow echoes, deep convective cores, wide convective co...
Vertical velocity data is first obtained using a dual-frequency profiler technique developed by Williams (2012). Then the profiler data is co-located with dual-polarimetric data from a scanning C-band radar. Finally, a theoretical framework that describes how the magnitude and variance in vertical velocities impact the vertical distribution of hydrometeors within convective cores is proposed.