Reconstruction of Extreme Rainfall Event on September 19-20, 2017, Using a Weather Radar in Bengkulu of Sumatra Island

Paski, Jaka Anugrah Ivanda; Alfahmi, Furqon; Permana, Donaldi Sukma; Makmur, Erwin Eka Syahputra

doi:10.1155/2020/1639054

Cited by 9 publications

(3 citation statements)

References 13 publications

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“…These results were confirmed by radar and satellite observations, though there were differences in the amplitude and timing of precipitation (Figures 1b and 1c). In particular, the radar estimates were low compared to the in situ and satellite observations, possibly due to bias in calibration, correction, and quantitative precipitation estimation (e.g., Paski et al., 2020).…”

Section: Characteristics Of Heavy Rainfallmentioning

confidence: 99%

Record‐Breaking Precipitation in Indonesia's Capital of Jakarta in Early January 2020 Linked to the Northerly Surge, Equatorial Waves, and MJO

Lubis

Hagos

Hermawan

et al. 2022

Geophysical Research Letters

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Jakarta, the capital megacity of Indonesia located in the northwest of Java Island, Indonesia (Figure 1a), experienced an extraordinary heavy rainfall event in early January 2020. The highest amount reached up to 377 mm (14.83 inches) per day, making it a record-breaking number in observations since 1866. This extreme rainfall subsequently triggered widespread disastrous flooding in Jakarta and its surroundings in the early morning of 1 January 2020, leading to catastrophic losses. It is estimated that at least 173,000 people were evacuated, 66 people died, more than 60% of the residential areas were submerged, and the economic loss reached over US$700 million (Berlinger & Yee, 2020;Nisa, 2020). Because of the high vulnerability of Jakarta to rainfall extremes, a better understanding of the physical processes of heavy rainfall is needed to establish a reliable extended-range flood forecast system for this region.Numerous studies have examined the effects of large-scale atmospheric circulation on precipitation extremes and major floods in Jakarta. For example, the major flooding event in February 2007 (the second highest record-breaking precipitation event) was attributed to an intense and persistent cross-equatorial northerly surge (CENS) that created an intensive low-level wind convergence and favorable dynamic conditions for the

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Section: Characteristics Of Heavy Rainfallmentioning

confidence: 99%

Record‐Breaking Precipitation in Indonesia's Capital of Jakarta in Early January 2020 Linked to the Northerly Surge, Equatorial Waves, and MJO

Lubis

Hagos

Hermawan

et al. 2022

Geophysical Research Letters

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“…Analysis using ground observations has the advantages of temporal resolution, high historical time series, and data interpretation that can describe actual conditions. Ground observation in the field has the disadvantage of low spatial resolution because it is limited by the number of existing observation stations [9]. On the other way, UHI analysis using remote sensing such as satellites will have a high spatial resolution when compared to ground observations but has a lack of temporal resolution.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Land Cover Changes to Increase Land Surface Temperature in Surabaya using Landsat Satellite

Prayuda,

Kusuma

2024

j. meteorologi dan geofisika

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Surabaya has experienced very significant development in the last few decades. Changes in land use will cause the Urban Heat Island phenomenon. This study aims to determine how far the impact of land cover changes on the increase in surface temperature in the Surabaya. The use of Landsat satellite imagery is considered very effective in describing land cover and surface temperature because it has good spatial resolution and long data availability. During 1991 – 2020 there was a significant decrease in the amount of vegetation by 24.3%, decrease in the number of water bodies by 4.9%, and increase in the number of buildings by 29.2%. The average increase in Land Surface Temperatures was 1.40°C between decades 2 and 1, and an increase of 2.19°C between decades 3 and 2. The development of Surabaya began in the city center and then developed mainly in the west and east. The urban development model is consistent with the pattern of land surface temperature changes. Each type of land cover has special characteristics on the value of NDVI, NDBI, and surface temperature. Changes in cover from water bodies to buildings have the highest contribution to increasing the and surface temperature. There was a significant increase in hotspots in decade 3 in Surabaya which indicated an increasingly severe UHI phenomenon.

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“…Understanding the environmental factors leading to this devastating flood and others like it may ultimately lead to improved predictions. Indonesia, as part of the Maritime Continent (MC), is particularly susceptible to extreme rainfall events, given the predominant tropical and monsoon climatological conditions (e.g., Chang et al 2005;Moron et al 2015) that often lead to severe floods (Aryastana et al 2015;Sekaranom and Masunaga 2017;Paski et al 2020). On a subseasonal time scale, precipitation over the MC is dominated by the Madden-Julian oscillation (MJO) (Madden and Julian 1972;Peatman et al 2014;Reid et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Sensitivity and Predictability of an Extreme Rainfall Event in Sulawesi, Indonesia

Doyle

Reynolds

Flatau

et al. 2023

SOLA

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The Makassar Peninsula in southwestern Sulawesi, Indonesia, experienced its largest flood in its recorded history in January 2019. Four-day accumulated rainfall exceeded 350 mm with devastating impacts on the community, including 53 perished and over 14 thousand evacuated. Previous studies find a convectively coupled Kelvin wave and convectively coupled equatorial Rossby wave associated with the Madden-Julian Oscillation to be likely contributors to the onset of the mesoscale convective system responsible for the flooding. We employ an adjoint model to identify and dynamically link specific components of the mesoscale and environmental flow affecting the flooding event.The adjoint simulations indicate that enhancing the moisture and low-level convergence associated with the mesoscale convective system can substantially increase rainfall. The sensitivity patterns are complex, with low-level convergence and vorticity sensitivity in quadrature and projecting onto the larger-scale Kelvin and Rossby waves.The vorticity sensitivity enhances waves along the dynamic equator. Small adjoint-based perturbations made to the initial state can increase the 36-h rainfall maximum by greater than 30%. The sensitivity analysis supports the importance of a mesoscale convective system, orographic ascent, and equatorial wave components in contributing to the flood.The rapid growth of small initial perturbations underscores the need for probabilistic forecasts.

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Reconstruction of Extreme Rainfall Event on September 19-20, 2017, Using a Weather Radar in Bengkulu of Sumatra Island

Cited by 9 publications

References 13 publications

Record‐Breaking Precipitation in Indonesia's Capital of Jakarta in Early January 2020 Linked to the Northerly Surge, Equatorial Waves, and MJO

Record‐Breaking Precipitation in Indonesia's Capital of Jakarta in Early January 2020 Linked to the Northerly Surge, Equatorial Waves, and MJO

Analysis of Land Cover Changes to Increase Land Surface Temperature in Surabaya using Landsat Satellite

Sensitivity and Predictability of an Extreme Rainfall Event in Sulawesi, Indonesia

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