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Tropical cyclone simulations over Bangladesh at convection permitting 4.4 km & 1.5 km resolution
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Tropical cyclone simulations over Bangladesh at convection permitting 4.4 km & 1.5 km resolution
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Journal Article
Tropical cyclone simulations over Bangladesh at convection permitting 4.4 km & 1.5 km resolution
2021
Overview
High resolution simulations at 4.4 km and 1.5 km resolution have been performed for 12 historical tropical cyclones impacting Bangladesh. We use the European Centre for Medium-Range Weather Forecasting 5
th
generation Re-Analysis (ERA5) to provide a 9-member ensemble of initial and boundary conditions for the regional configuration of the Met Office Unified Model. The simulations are compared to the original ERA5 data and the International Best Track Archive for Climate Stewardship (IBTrACS) tropical cyclone database for wind speed, gust speed and mean sea-level pressure. The 4.4 km simulations show a typical increase in peak gust speed of 41 to 118 knots relative to ERA5, and a deepening of minimum mean sea-level pressure of up to −27 hPa, relative to ERA5 and IBTrACS data. The downscaled simulations compare more favourably with IBTrACS data than the ERA5 data suggesting tropical cyclone hazards in the ERA5 deterministic output may be underestimated. The dataset is freely available from
https://doi.org/10.5281/zenodo.3600201
.
Measurement(s)
atmospheric wind speed • wind speed of gust • temperature of air • humidity • geopotential height • water-based rainfall • snowfall • pressure of air • air pressure at sea level • wet bulb potential temperature • net down surface SW flux • surface downwelling SW flux in air
Technology Type(s)
computational modeling technique
Factor Type(s)
spatial resolution: 4.4 km & 1.5 km
Sample Characteristic - Environment
atmospheric weather • atmospheric boundary layer • cyclone
Sample Characteristic - Location
Bangladesh • South Asia
Machine-accessible metadata file describing the reported data:
https://doi.org/10.6084/m9.figshare.13560560
