Super El Niño

Hong, Li‐Ciao

doi:10.1007/978-981-10-0527-5

Cited by 6 publications

(3 citation statements)

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“…Salah satunya adalah penelitian Kurniawan [4] yang membuktikan pengaruh ElNino terhadap gelombang signifikan tidak kuat berdasarkan data model WINDWAVE-05 periode tahun 2000-2010. Penelitian tersebut tidak mampu menganalisis dengan baik karena periode penelitian tidak mencakup masa super ElNino [5]. Oleh karena itu, penulis akan mengkaji ulang pengaruh ElNino terhadap gelombang signifikan di perairan Indonesia dengan periode yang mencakup peristiwa ElNino super.…”

Section: Pendahuluanunclassified

Pengaruh ElNino pada Gelombang Signifikan di Perairan Indonesia

Rais¹

2019

JFA

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Dalam penelitian sebelumnya, pengaruh ElNino terhadap gelombang signifikan tidak mampu dianalisis dengan baik karena simulasi model yang digunakan tidak mencakup periode ElNino super. Oleh karena itu, kajian ulang perlu dilakukan dengan mempergunakan data yang mencakup periode ElNino super. Sebelum dilakukan analisis, penulis menilai akurasi gelombang signifikan model wavewatch III (WW3) dengan menghitung korelasi dan root mean square error (RMSE) terhadap data gelombang signifikan satelit altimeter. Pengaruh ElNino terhadap gelombang signifikan didapatkan dari nilai korelasi antara oceanic nino index (ONI) 3.4 dengan gelombang signifikan WW3. Penulis juga menghitung rasio antara komposit gelombang signifikan saat ElNino/LaNina serta ElNino super dengan gelombang signifikan saat normalnya. Hasil penelitian menunjukkan bahwa gelombang signifikan WW3 yang digunakan memiliki akurasi yang baik pada perairan Indonesia. El-Nino dan LaNina memiliki pengaruh yang kuat terhadap gelombang signifikan di Laut Jawa dan Selat Sunda pada periode Desember-Januari-Februari (DJF). ElNino (LaNina) dapat mengurangi (menambah) tinggi gelombang signifikan sampai 30% dari normalnya di Laut Jawa dan Selat Sunda. Pada kasus ekstrim, ElNino super mampu mengurangi tinggi gelombang signifikan sampai 50% terhadap normalnya.

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Section: Pendahuluanunclassified

Pengaruh ElNino pada Gelombang Signifikan di Perairan Indonesia

Rais¹

2019

JFA

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“…In the satellite era, only three strong El Niño events (excluding the coastal type) have been observed (1982/83, 1997/98, and 2015/16). Nevertheless, and despite their limited number, extreme El Niño events may share some common features (Hong, 2016). Therefore, the group study of extreme El Niño provides an excellent starting point to understand the complexity of the El Niño phenomenon.…”

Section: Introductionmentioning

confidence: 99%

Effect of extreme El Niño events on the precipitation of Ecuador

Thielen

Ramoni‐Perazzi

Zamora-Ledezma

et al. 2023

Nat. Hazards Earth Syst. Sci.

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Abstract. Extreme El Niño events stand out not only because they have powerful impacts but also because they are significantly different from other El Niños. In Ecuador, such events are accountable for negatively impacting the economy, infrastructure, and population. Spatial–temporal dynamics of precipitation anomalies from various types of extreme El Niño events are analyzed and compared. Results show that for eastern Pacific (EP) and coastal Pacific (COA) El Niño types, most precipitation extremes occur in the first half of the second year of the event. Any significant difference between events becomes more evident at this stage. Spatially, for any event, 50 % of all extreme anomalies occurred at elevations < 150 m. The difference between events was significant when considering the altitude when reaching 80 % of all extreme anomalies: the eastern Pacific (EP) El Niño from 1997/98 (EP98) at 500 m, the El Niño from January to April 2017 (COA17) at 800 m, and the EP El Niño from 1982/83 (EP83) at 1000 m. Nevertheless, in some sectors of the Andean Cordillera, the El Niño–Southern Oscillation (ENSO) signal could be detected at 3200–3900 m. The distance to the coastline and the steepness of relief may play a determining role. At lowlands, anomalies are most severe in regions where the seasonality index is the highest. These results are useful at different decision-making levels for identifying the most appropriate practices reducing vulnerability from a potential increase in extreme El Niño frequency and intensity.

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“…Detailed basin-wide assessments of the influence of ENSO in the transition from the coastal plain toward the western Andean Cordillera are also very scarce (Pineda et al 2013). Various studies have considered 5 precipitation in Ecuador (Rossel et al, 1999;Bendix and Bendix, 2006;Buytaert et al, 2006), or have focused on precipitation in specific areas of the country (Mora and Willems, 2012;Thielen et al, 2015 and2016). In general, a strong connection between the ENSO and precipitation in Ecuador has been found, but none of the previous studies analyzed stations throughout the entire country (Morán-Tejeda et al, 2016).…”

mentioning

confidence: 99%

Effect of extreme El Niño events on the precipitations of Ecuador

Thielen

Ramoni‐Perazzi

Puche

et al. 2022

Preprint

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Abstract. Extreme El Niño events stand out not only for their powerful impacts but also because they are significantly different from other El Niños. In Ecuador, such events are accountable for impacting negatively the economy, infrastructure, and population. Spatial-temporal dynamics of precipitation anomalies from various types of extreme El Niño events are analyzed and compared. Results show that for Eastern Pacific and Coastal El Niño types, most precipitation extremes occur in the first half of the second year of the event. Any significant difference between events becomes more evident at this stage. Spatially, for any event, 50 % of all extreme anomalies occurred at elevations <150 m. Difference between events was significant when considering the altitude when reaching 80 % of all extreme anomalies: EP-EN 97/98 at 500 m, COA-EN 17 at 800 m, and EN 82/83 at 1000 m. Nevertheless, in some sectors of the Andean Cordillera, the ENSO signal could be detected at 3200–3900 m. Distance to coastline and steepness of relief may play determining role. At lowlands, anomalies are most severe in regions where seasonality index is the highest. These results are useful at different decision-making levels for identifying most appropriate practices reducing vulnerability from a potential increase in extreme El Niño frequency and intensity.

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Super El Niño

Cited by 6 publications

References 0 publications

Pengaruh ElNino pada Gelombang Signifikan di Perairan Indonesia

Pengaruh ElNino pada Gelombang Signifikan di Perairan Indonesia

Effect of extreme El Niño events on the precipitation of Ecuador

Effect of extreme El Niño events on the precipitations of Ecuador

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