2020
DOI: 10.1175/waf-d-20-0017.1
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Cloud-Resolving Model Applied to Nowcasting: An Evaluation of Radar Data Assimilation and Microphysics Parameterization

Abstract: This research explores the benefits of radar data assimilation for short-range weather forecast in Southeastern Brazil using the Weather Research and Forecasting (WRF) model’s three-dimensional variational data assimilation (3DVAR) system. Different data assimilation options are explored, including the cycling frequency, the number of outer loops and the use of null-echo assimilation. Initially, four microphysics parameterizations are evaluated (Thompson, Morrison, WSM6 and WDM6). The Thompson parameterization… Show more

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Cited by 2 publications
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“…Previously, most numerical simulation researches on the effect of different LH altitudes were about large-scale circulations [22,23]. The fact that CRMs tend to create top-heavier reflectivity and overestimate MCS updrafts in the middle and upper troposphere compared to the observation in many cases [24][25][26], indicate that uncertainties of certain vertical scale may exist in these simulations. In their ideal simulation study, Pandya and Durran [5] indicated that differences in LH profiles may result in different development of the circulation within MCSs.…”
Section: Introductionmentioning
confidence: 99%
“…Previously, most numerical simulation researches on the effect of different LH altitudes were about large-scale circulations [22,23]. The fact that CRMs tend to create top-heavier reflectivity and overestimate MCS updrafts in the middle and upper troposphere compared to the observation in many cases [24][25][26], indicate that uncertainties of certain vertical scale may exist in these simulations. In their ideal simulation study, Pandya and Durran [5] indicated that differences in LH profiles may result in different development of the circulation within MCSs.…”
Section: Introductionmentioning
confidence: 99%
“…Newer studies are emerging to illustrate data assimilation techniques to better configure cloud microphysical schemes, particularly when both droplet sizes and numbers are used to compute cloud conversion. A recent paper by Vendrasco et al [11] recommended the use of radar data assimilation for short-range local predictions using the widely used Weather Research and Forecasting (WRF) model configured with a double-moment microphysical scheme. At this stage, we wish to point out that the present paper used droplet spectral attributes within the remit of an optimised Kessler scheme for warm rain processes through the WRF double-moment scheme.…”
Section: Introductionmentioning
confidence: 99%