Investigation of Atmospheric Conditions Associated with a Storm Surge in the South-West of Iran

Severe thunderstorms are often accompanied by strong vertical air currents, temporary wind gusts, and heavy rainfall. The development of this atmospheric phenomenon over tropical shallow water zones, such as bays, can lead to intensification of atmospheric disturbances and produce a small-scale storm surge. Here, the storm surge that occurred on 19 March 2017 in the Persian Gulf coastal area has been investigated. Air temperature, precipitation, mean sea level pressure, wave height, wind direction, wind speed, geopotential height, zonal components, meridional winds, vertical velocity, relative humidity, and specific humidity obtained from the European Centre for Medium-Range Weather Forecasts (ECMWF (and Global Forecast System (FNL) were used to implement the Weather Research and Forecasting (WRF) model. The results showed that the main cause of the storm surge was the occurrence of a supercell thunderstorm over the Persian Gulf. The formation of this destructive phenomenon resulted from a downburst under Cumulonimbus cloud and high-velocity air subsidence, after collision with the sea surface coinciding with the high tide. This caused a severe, yet temporary, gust, which in turn caused the creation of the four waves of 3.1 m height along the coast of Bandar Dayyer.

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Investigation of Atmospheric Conditions Associated with a Storm Surge in the South-West of Iran

Atmosphere ◽

10.3390/atmos12111429 ◽

2021 ◽

Vol 12 (11) ◽

pp. 1429

Author(s):

Esmaeil Abbasi ◽

Hana Etemadi ◽

Joseph M. Smoak ◽

Iman Rousta ◽

Haraldur Olafsson ◽

...

Keyword(s):

Storm Surge ◽

Persian Gulf ◽

High Tide ◽

Wrf Model ◽

Specific Humidity ◽

Small Scale ◽

Atmospheric Conditions ◽

Severe Thunderstorms ◽

Meridional Winds ◽

The Persian Gulf

Severe thunderstorms are often accompanied by strong vertical air currents, temporary wind gusts, and heavy rainfall. The development of this atmospheric phenomenon over tropical shallow water zones, such as bays, can lead to intensification of atmospheric disturbances and produce a small-scale storm surge. Here, the storm surge that occurred on 19 March 2017 in the Persian Gulf coastal area has been investigated. Air temperature, precipitation, mean sea level pressure, wave height, wind direction, wind speed, geopotential height, zonal components, meridional winds, vertical velocity, relative humidity, and specific humidity obtained from the European Centre for Medium-Range Weather Forecasts (ECMWF) and Global Forecast System (FNL) were used to implement the Weather Research and Forecasting (WRF) model. The results showed that the main cause of the storm surge was the occurrence of a supercell thunderstorm over the Persian Gulf. The formation of this destructive phenomenon resulted from a downburst under Cumulonimbus cloud and high-velocity air subsidence, after collision with the sea surface coinciding with the high tide. This caused a severe, yet temporary, gust, which in turn caused the creation of the four waves of 3.1 m height along the coast of Bandar Dayyer.

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Simulation of Severe Thunderstorms in Conjugation of Westerly and Easterly on 31 March 2019 in Bangladesh

Journal of Engineering Science ◽

10.3329/jes.v12i3.57477 ◽

2022 ◽

Vol 12 (3) ◽

pp. 29-43

Author(s):

Samarendra Karmakar ◽

Mohan Kumar Das ◽

Md Quamrul Hassam ◽

Md Abdul Mannan

Keyword(s):

South Asian ◽

Wrf Model ◽

Horizontal Resolution ◽

Weather Research And Forecasting ◽

Atmospheric Conditions ◽

Microphysics Scheme ◽

Severe Thunderstorms ◽

Synoptic Conditions ◽

Pbl Scheme ◽

Single Moment

The diagnostic and prognostic studies of thunderstorms/squalls are very important to save live and loss of properties. The present study aims at diagnose the different tropospheric parameters, instability and synoptic conditions associated the severe thunderstorms with squalls, which occurred at different places in Bangladesh on 31 March 2019. For prognostic purposes, the severe thunderstorms occurred on 31 March 2019 have been numerically simulated. In this regard, the Weather Research and Forecasting (WRF) model is used to predict different atmospheric conditions associated with the severe storms. The study domain is selected for 9 km horizontal resolution, which almost covers the south Asian region. Numerical experiments have been conducted with the combination of WRF single-moment 6 class (WSM6) microphysics scheme with Yonsei University (YSU) PBL scheme in simulation of the squall events. Model simulated results are compared with the available observations. The observed values of CAPE at Kolkata both at 0000 and 1200 UTC were 2680.4 and 3039.9 J kg-1 respectively on 31 March 2019 and are found to be comparable with the simulated values. The area averaged actual rainfall for 24 hrs is found is 22.4 mm, which complies with the simulated rainfall of 20-25 mm for 24 hrs. Journal of Engineering Science 12(3), 2021, 29-43

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Performance of Bycatch Reduction Devices in the Small-Scale Shrimp Trawl Fishery of the Persian Gulf

Thalassas An International Journal of Marine Sciences ◽

10.1007/s41208-018-0114-x ◽

2018 ◽

Vol 35 (1) ◽

pp. 229-238

Author(s):

Morteza Eighani ◽

Seyed Yousef Paighambari

Keyword(s):

Persian Gulf ◽

Small Scale ◽

Trawl Fishery ◽

Bycatch Reduction ◽

Shrimp Trawl ◽

The Persian Gulf

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Evaluation of Different Wind Fields for Storm Surge Modeling in the Persian Gulf

Journal of Coastal Research ◽

10.2112/jcoastres-d-15-00202.1 ◽

2016 ◽

Vol 33 (3) ◽

pp. 596 ◽

Cited By ~ 6

Keyword(s):

Storm Surge ◽

Persian Gulf ◽

Wind Fields ◽

Storm Surge Modeling ◽

The Persian Gulf

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Observations and Modeling of Atmospheric Profiles in the Arctic Seasonal Ice Zone

Monthly Weather Review ◽

10.1175/mwr-d-14-00118.1 ◽

2015 ◽

Vol 143 (1) ◽

pp. 39-53 ◽

Cited By ~ 8

Author(s):

Zheng Liu ◽

Axel Schweiger ◽

Ron Lindsay

Keyword(s):

Boundary Layer ◽

Relative Humidity ◽

Wrf Model ◽

Specific Humidity ◽

The Arctic ◽

Atmospheric Conditions ◽

Near Surface ◽

Low Level ◽

The Mean ◽

Seasonal Ice Zone

Abstract The authors use the Polar Weather Research and Forecasting (WRF) Model to simulate atmospheric conditions during the Seasonal Ice Zone Reconnaissance Survey (SIZRS) in the summer of 2013 over the Beaufort Sea. With the SIZRS dropsonde data, the performance of WRF simulations and two forcing datasets is evaluated: the Interim ECMWF Re-Analysis (ERA-Interim) and the Global Forecast System (GFS) analysis. General features of observed mean profiles, such as low-level temperature inversion, low-level jet (LLJ), and specific humidity inversion are reproduced by all three models. A near-surface warm bias and a low-level moist bias are found in ERA-Interim. WRF significantly improves the mean LLJ, with a lower and stronger jet and a larger turning angle than the forcing. The improvement in the mean LLJ is likely related to the lower values of the boundary layer diffusion in WRF than in ERA-Interim and GFS, which also explains the lower near-surface temperature in WRF than the forcing. The relative humidity profiles have large differences between the observations, the ERA-Interim, and the GFS. The WRF simulated relative humidity closely resembles the forcings, suggesting the need to obtain more and better-calibrated humidity data in this region. The authors find that the sea ice concentrations in the ECMWF model are sometimes significantly underestimated due to an inappropriate thresholding mechanism. This thresholding affects both ERA-Interim and the ECMWF operational model. The scale of impact of this issue on the atmospheric boundary layer in the marginal ice zone is still unknown.

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