DOI: 10.1007/s11069-020-04208-0
论文题名: Weather radar and ancillary observations of the convective system causing the northern Persian Gulf meteotsunami on 19 March 2017
作者: Kazeminezhad M.H. ; Vilibić I. ; Denamiel C. ; Ghafarian P. ; Negah S.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2021
卷: 106, 期: 2 起始页码: 1747
结束页码: 1769
语种: 英语
中文关键词: Mesoscale atmospheric system
; Meteotsunami
; Northern Persian Gulf
; Proudman resonance
; Squall line
; Weather radar
英文关键词: convective system
; mesoscale meteorology
; radar
; resonance
; squall line
; tsunami
; weather
; Arabian Sea
; Indian Ocean
; Persian Gulf
英文摘要: This study documents the atmospheric system driving the observed meteotsunami waves that hit the northern Persian Gulf on 19 March 2017 during high tide. This destructive meteotsunami event resulted in coastal inundations that reached several hundred metres inland along the 100-km coastline between the cities of Dayyer and Asaluyeh and caused the death or injury of 27 persons. Based on previously published research, eyewitness reports, oceanic and atmospheric observations, including synoptic station and weather radar data, and available reanalysis ERA5 products, this study provides new insights into destructive events, particularly mesoscale atmospheric systems conjoined with observed meteotsunami waves. Precipitation intensity, maximum reflectivity and echo top height images provided by the weather radar covering the affected area and the area over which the meteotsunamigenic disturbance travelled revealed that a strong convective system that encompassed the mid- and upper troposphere entered the northern Persian Gulf approximately 4 h before the event and moved eastward. Two hours before reaching the affected coastline, this convective system was reshaped to an elongated and narrow squall line varying between 70 and 130 km in length with a width of less than 10 km and travelled at an average speed of approximately 24 m/s over the sea. The peak maximum reflectivity of the squall line always surpassed 40 dBZ, while it increased to 60 dBZ near the Dayyer area. As such, intense atmospheric disturbances are known to be associated with sharp air pressure increases, and these disturbances were found to resonantly pump energy to the ocean through Proudman resonance for over 12 or more disturbance wavelengths (i.e. up to 120 km in this study). A half-metre meteotsunami wave was presumably created in the open sea and then amplified while travelling towards the shore where it broke as a meteotsunami bore and inundated the coastal areas. Further research on the physical mechanisms driving the interactions between meteotsunamigenic disturbances and ocean responses, the recurrence of such events and meteotsunami hazard assessments along the affected coastline is envisaged. © 2020, Springer Nature B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169120
Appears in Collections: 气候变化与战略
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作者单位: Iranian National Institute for Oceanography and Atmospheric Science, Etemad Zadeh St., Fatemi Ave., Tehran, 14155-4781, Iran; Institute of Oceanography and Fisheries, Šetalište I. Meštrovića 63, Split, 21000, Croatia; I.R. Iran Meteorological Organization, Gilan Meteorology Office, Havashenasi St., Moallem Blv., Rasht, Gilan, Iran
Recommended Citation:
Kazeminezhad M.H.,Vilibić I.,Denamiel C.,et al. Weather radar and ancillary observations of the convective system causing the northern Persian Gulf meteotsunami on 19 March 2017[J]. Natural Hazards,2021-01-01,106(2)