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arXiv · 1711.04163

Evaluation of different WRF microphysics schemes: severe rainfall over Egypt case study

Muhammed ElTahan·Mohammed Magooda
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Abstract

Egypt faced heavy rainfall starting from 26th October 2016 which caused flooding in Upper Egypt and Red Sea Coast especially the city of Ras Gharib. In this work, Weather Research and Forecasting (WRF) model was used with one domain of 10-km resolution for three days starting from 26th October 2016 to simulate this severe rainy event in terms of precipitation, temperature, pressure and wind speed. In order to use the WRF model several schemes should be configured, one of them is the microphysics scheme. Microphysics is the process by which moisture is removed from the air, based on other thermodynamic and kinematic fields represented within the numerical models. Sensitivity of ten microphysics schemes were tested (Kessler, Lin, WRF single moment 3 and 5 class, Eta (Ferrier), WRF single Scheme 6 Class, Goddard, Thompson, Milbrandt-Yau Double Moment and Morrison double moment). The output temperature and precipitation from the model were compared to the satellite data obtained from Moderate Resolution Imaging Spectroradiometer (MODIS) and Tropical Rainfall Measuring Mission (TRMM), respectively. Our analysis showed that the model has the capability to simulate the rainy event spatially and produce the cloud pattern. Three coastal areas were chosen for this study, the city of Ras Gharib, Wadi Elgemal National park, and Elba National park. The results showed that the model generally tends to overestimate the precipitation for all the ten schemes and underestimated temperature compared to TRMM and MODIS data respectively

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Muhammed ElTahan, Mohammed Magooda. 2017-11-11. Evaluation of different WRF microphysics schemes: severe rainfall over Egypt case study. https://doi.org/10.1088/1742-6596%2F1039%2F1%2F012024

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