Publication Abstracts
Tao et al. 2016
Tao, W.-K., D. Wu, S.K. Lang, J.-D. Chern, C. Peters-Lidard, , and T. Matsui, 2016: High-resolution NU-WRF simulations of a deep convective-precipitation system during MC3E: Part I: Comparisons between Goddard microphysics schemes and observations. J. Geophys. Res. Atmos., 121, no. 3, 1278-1305, doi:10.1002/2015JD023986.
The Goddard microphysics were recently improved by adding a 4th ice class (frozen drops/hail). This new 4ICE scheme was developed and tested in the Goddard Cumulus Ensemble model (GCE) for an intense continental squall line and a moderate, less-organized continental case. Simulated peak radar reflectivity profiles were improved in intensity and shape for both cases, as were the overall reflectivity probability distributions versus observations. In this study, the new Goddard 4ICE scheme is implemented into the regional-scale NASA Unified — Weather Research and Forecasting model (NU-WRF), modified and evaluated for the same intense squall line, which occurred during the Midlatitude Continental Convective Clouds Experiment (MC3E). NU-WRF simulated radar reflectivities, total rainfall, propagation, and convective system structures using the 4ICE scheme modified herein agree as well as or significantly better with observations than the original 4ICE and two previous 3ICE (graupel or hail) versions of the Goddard microphysics. With the modified 4ICE, the bin microphysics-based rain evaporation correction improves propagation and in conjunction with eliminating the unrealistic dry collection of ice/snow by hail can replicate the erect, narrow and intense convective cores. Revisions to the ice supersaturation, ice number concentration formula, and snow size mapping, including a new snow breakup effect, allow the modified 4ICE to produce a stronger, better organized system, more snow, and mimic the strong aggregation signature in the radar distributions. NU-WRF original 4ICE simulated radar reflectivity distributions are consistent with and generally superior to those using the GCE due to the less restrictive domain and lateral boundaries.
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BibTeX Citation
@article{ta01100l,
author={Tao, W.-K. and Wu, D. and Lang, S. K. and Chern, J.-D. and Peters-Lidard, C. and Fridlind, A. and Matsui, T.},
title={High-resolution NU-WRF simulations of a deep convective-precipitation system during MC3E: Part I: Comparisons between Goddard microphysics schemes and observations},
year={2016},
journal={J. Geophys. Res. Atmos.},
volume={121},
number={3},
pages={1278--1305},
doi={10.1002/2015JD023986},
}
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RIS Citation
TY - JOUR ID - ta01100l AU - Tao, W.-K. AU - Wu, D. AU - Lang, S. K. AU - Chern, J.-D. AU - Peters-Lidard, C. AU - Fridlind, A. AU - Matsui, T. PY - 2016 TI - High-resolution NU-WRF simulations of a deep convective-precipitation system during MC3E: Part I: Comparisons between Goddard microphysics schemes and observations JA - J. Geophys. Res. Atmos. VL - 121 IS - 3 SP - 1278 EP - 1305 DO - 10.1002/2015JD023986 ER -
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