TY - GEN
T1 - Meteorological Factors Influencing Coastal Flooding in Semarang, Central Java, Indonesia, on 23 May 2022
AU - Harjana, Teguh
AU - Hermawan, Eddy
AU - Risyanto,
AU - Purwaningsih, Anis
AU - Andarini, Dita Fatria
AU - Ridho, Ainur
AU - Ratri, Dian Nur
AU - Sujalu, Akas Pinaringan
PY - 2023
Y1 - 2023
N2 - It has been well established that coastal flooding is caused by heavy rains, storm surges, and high tidal waves that potentially lead to tremendous damage. Using brightness temperature (TBB) data from the Himawari satellite and ocean surface wind data from ERA5, we have investigated meteorological factors influencing strong wind and increased seawater level over the northern coast of Semarang which caused the coastal flood on 23 May 2022. Our results indicated that there are two potential meteorological factors that contribute to the coastal flooding during that period. Firstly, the formation of MCS over the ocean on the northern coast of Semarang led to heavy rain over the coast and strong-surface wind speed that potentially enhances ocean tidal waves toward Semarang. Secondly, the unusually strong-surface easterly winds cause the increase in seawater level through the Ekman pumping mechanism. As for the latter, the strong easterly wind stress led to strong Ekman transport to the south of the flow (i.e., to the northern coast of Java), causing a large net transport of seawater toward this region as a result of a balance between Coriolis and turbulent (wind) drag forces. Our results provided a new perspective on the factors influencing the increased seawater level intruding into Semarang during the coastal flooding on 23 May 2022.
AB - It has been well established that coastal flooding is caused by heavy rains, storm surges, and high tidal waves that potentially lead to tremendous damage. Using brightness temperature (TBB) data from the Himawari satellite and ocean surface wind data from ERA5, we have investigated meteorological factors influencing strong wind and increased seawater level over the northern coast of Semarang which caused the coastal flood on 23 May 2022. Our results indicated that there are two potential meteorological factors that contribute to the coastal flooding during that period. Firstly, the formation of MCS over the ocean on the northern coast of Semarang led to heavy rain over the coast and strong-surface wind speed that potentially enhances ocean tidal waves toward Semarang. Secondly, the unusually strong-surface easterly winds cause the increase in seawater level through the Ekman pumping mechanism. As for the latter, the strong easterly wind stress led to strong Ekman transport to the south of the flow (i.e., to the northern coast of Java), causing a large net transport of seawater toward this region as a result of a balance between Coriolis and turbulent (wind) drag forces. Our results provided a new perspective on the factors influencing the increased seawater level intruding into Semarang during the coastal flooding on 23 May 2022.
U2 - 10.1007/978-981-19-9768-6_25
DO - 10.1007/978-981-19-9768-6_25
M3 - Conference paper
AN - SCOPUS:85168769996
SN - 9789811997679
T3 - Springer Proceedings in Physics
SP - 259
EP - 267
BT - Proceedings of the International Conference on Radioscience, Equatorial Atmospheric Science and Environment and Humanosphere Science - INCREASE 2022
A2 - Basit, Abdul
A2 - Yulihastin, Erma
A2 - Cahyarini, Sri Yudawati
A2 - Santoso, Heru
A2 - Slamet S., Lilik
A2 - Belgaman, Halda Aditya
A2 - Pranowo, Widodo S.
PB - Springer
T2 - 2nd International Conference on Radioscience, Equatorial Atmospheric Science and Environment, INCREASE 2022
Y2 - 22 November 2022 through 23 November 2022
ER -