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    Tytuł:
    Assessment of annual high-discharge patterns in Kapuas River using information and complexity measures
    Autorzy:
    Gusti, Gillang N.N.
    Herawati, Henny
    Kawanisi, Kiyosi
    Al Sawaf, Mohamad B.
    Danial, Mochammad M.
    Powiązania:
    https://bibliotekanauki.pl/articles/27312645.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    El Niño-Southern Oscillation
    flood pattern
    information measures
    complexity measures
    Kapuas River
    tropical monsoon
    Opis:
    A recent study revealed that the amount of rainfall on the Kapuas River has increased over the last 30 years. The increase in rainfall increases the possibility of high discharge events, which might lead to destructive flooding of the Kapuas River and its tributaries. Hence, the ability to characterise the pattern of high discharge events is compulsory for the development and management of the Kapuas River watershed. The main objective of this study was to assess and characterise flood patterns in the Kapuas River watershed. To achieve this objective, we utilised information and complexity measures that consisted of mean information gain (MIG), effective measure complexity (EMC) and fluctuation complexity (FC) in daily water level records from 2002 to 2011 from a gauging station in Sanggau, West Kalimantan Province. The results revealed that flood events in the Kapuas River were mainly generated by the Indo-Australian monsoon, which occurred from December to March. The anomaly in 2010, when intense flood events were observed during the dry season, can be identified as the effect of a strong negative El Niño-Southern Oscillation (ENSO). Additionally, the analysis of the information and complexity measures indicates that: (i) EMC, which reflects the length of flood events, tends to increase along with greater discharge, and (ii) MIG and FC, which denote the degree of randomness and fluctuation of flood events, respectively, tended to have higher values when the number of months without high discharge was less.
    Źródło:
    Journal of Water and Land Development; 2023, 57; 62--68
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Barycenter reflected equatorial Pacific sea level structure evolution and its indication of ENSO events
    Autorzy:
    Luo, W.
    Yi, L.
    Yu, Z.
    Sun, H.
    Yuan, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/49107.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    sea level
    El Nino-Southern Oscillation
    Equatorial Pacific
    satellite altimetry
    principal tensor analysis
    barycenter method
    Źródło:
    Oceanologia; 2015, 57, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    El-Nino effect on reservoir capacity reliability: Case study of Sumi dam, Sumbawa Island, Indonesia
    Autorzy:
    Andawayanti, Ussy
    Yasa, I. Wayan
    Bisri, Mohammad
    Sholichin, Mochamad
    Sulianto, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/947275.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    capacity
    El-Nino
    evaporation
    reliability
    reservoir
    Opis:
    Reservoirs have a very important function in providing multi-sector water requirements. In the future, reservoirs not only serve to store and available water can also be used as disaster mitigation instruments. The completeness of hydrological measurements in reservoirs can be expanded more widely for climate change mitigation. The reliability of the reservoir capacity varies greatly depending on the El-Nino character that occurs among them El-Nino is weak, moderate, strong and very strong. The El-Nino characteristic is very influential on the period of water availability, the increase of evaporation capacity and decrease of reservoir capacity. Analysis of the reliability of the reservoir volume due to El-Nino using the Weibull equation. The deficit reservoir was calculated using the concept of water balance in the reservoir that is the relationship between inflow, outflow, and change of storage at the same time. Based on the results of the analysis showed that the evaporation increase and the decrease of reservoir capacity had a different pattern that is when the evaporation capacity started to increase at the same time the reservoir capacity decreased significantly. The correlation coefficient between evaporation capacity increase and decrease of reservoir water capacity are consecutively –0.828, –0.636, and –0.777 for El- Nino weak, moderate and very strong respectively. At the reservoir capacity reliability of 50% reservoir has a significant deficit. When weak El-Nino the deficit is 2.30∙106 m3, moderate: 6.58∙106 m3, and very strong 8.85∙106 m3.
    Źródło:
    Journal of Water and Land Development; 2020, 44; 1-7
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hydrological drought index based on reservoir capacity – Case study of Batujai dam in Lombok Island, West Nusa Tenggara, Indonesia
    Wskaźnik suszy hydrologicznej obliczany na podstawie pojemności zbiornika – przypadek zapory Batujai na wyspie Lombok, West Nusa Tenggara w Indonezji
    Autorzy:
    Yasa, I. W.
    Bisri, M.
    Sholichin, M.
    Andawayanti, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/293090.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    drought
    El-Nino
    hydrological drought index
    inflow
    outflow
    reservoir
    dopływ
    El-Niño
    odpływ
    susza
    wskaźnik suszy hydrologicznej
    zbiornik
    Opis:
    Hydrological drought index analysis has been widely developed and applied for the development of water resources. The island of Lombok, which is largely a dry land, requires a significant hydrological drought index to be sourced from measurable data analysis. This research focused aims to obtain hydrological drought index in Lombok Island using the capacity change of reservoir. The analysis includes reservoir data especially in the event of El-Nino. The main parameters analysed in this work are data homogeneity, decrease line of reservoir volume, increase in the line of reservoir volume, reservoir volume deficit, and hydrological drought index (RDI). The basic equation uses the water balance in the reservoir, which is the inflow–outflow and change of reservoir. The results of the analysis show that in the event of El-Nino, the drought hydrological index indicates different levels depending upon the water level of the reservoir. The criteria for the drought level are as follows: weak RDI = from −0.46 to −0.01 at an reservoir elevation of 90.88 to 92.33 m a.s.l, moderate RDI: from −0.59 to −0.46 at water level of reservoir from 90.27 to 90.88 m a.s.l, sever RDI: from −0.80 to −0.59 at water level of reservoir from 88.83 to 90.27 m a.s.l. and very severe RDI: from −0.89 to −0.80 at water level of water reservoir 87.78–88.83 m a.s.l. The duration of drought was 9 months, i.e., from February to November.
    Analiza wskaźnika suszy hydrologicznej ma szerokie zastosowanie w zarządzaniu zasobami wodnymi. Na ubogiej w wodę wyspie Lombok wskaźnik suszy powinien być określany na podstawie analizy mierzalnych danych. Przedstawione w niniejszej pracy badania miały na celu ustalenie wskaźnika dla wyspy z wykorzystaniem zmian pojemności zbiornika. Podstawą analiz były dane o zbiorniku, szczególnie podczas wystąpień El-Niño. Głównymi parametrami analizowanymi w tej pracy były: homogeniczność danych, linia spadku objętości zbiornika, linia wzrostu objętości zbiornika, deficyt objętości zbiornika i wskaźnik suszy hydrologicznej (RDI). Podstawowe równanie ujmuje bilans wody w zbiorniku, tzn. dopływ, odpływ i zmiany objętości. Wyniki analiz wskazują, że w trakcie trwania El-Niño wskaźnik suszy hydrologicznej przyjmował różne wartości w zależności od poziomu wody w zbiorniku. Kryteria natężenia suszy były następujące: słaba susza – RDI od –0,46 do –0,01, gdy poziom wody w zbiorniku wynosił od 90,88 do 92,33 m n.p.m., umiarkowana susza – RDI od –0,59 do –0,46, gdy poziom wody od 90,27 do 90,88 m n.p.m., silna susza – RDI od –0,80 do –0,59, gdy poziom wody od 88,83 do 90,27 m n.p.m. i bardzo silna susza – RDI od –0,89 do –0.80, gdy poziom wody od 87,78 do 88,83 m n.p.m. Susza w trakcie bardzo silnego El-Niño trwała 9 miesięcy od lutego do listopada.
    Źródło:
    Journal of Water and Land Development; 2018, 38; 155-162
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Przestrzenne zróżnicowanie ENSO
    The ENSO spatial diversity
    Autorzy:
    Rucinska, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2084712.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
    Tematy:
    rolnictwo
    dzialalnosc czlowieka
    rybolowstwo
    ENSO
    El Nino
    przyroda
    historia
    Opis:
    The paper offers information about the spatial diversity of the El Niño Southern Oscillation (ENSO) in such aspects as the spatial range of the phenomenon and its varying impacts on agriculture, i.e. plant cultivation and fishery. The author discusses both positive and negative consequences of the El Niño and La Niña phases. The nature of the phenomenon underpins the author's analysis of the region. Theoretically, the criterion for the differentiation of an impact region is the existence, within its territory, of a relationship between specific phenomena (in this case, natural phenomena and human agricultural activity), and the relevance of a given criterion is crucial for a problem at hand. Such a condition is fulfilled by areas with anthropogenic activity which are significantly subject to the ENSO influence. This approach is related to the research concept proposed by regional geography (Dumanowski 1981), which revolves around the relationships between the environment and man.
    Źródło:
    Prace i Studia Geograficzne; 2010, 44; 115-138
    0208-4589
    Pojawia się w:
    Prace i Studia Geograficzne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spatial and temporal patterns of ocean variability using empirical orthogonal functions (EOF) in the Southern Java Waters
    Autorzy:
    Syamsuddin, Mega
    Powiązania:
    https://bibliotekanauki.pl/articles/1031454.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    El Niño Southern Oscillation
    Empirical Orthogonal Function
    Ocean variability
    Opis:
    The oceanographic parameters of Sea Surface Temperature (SST) from NOAA/AVHRR, Chlorophyll-a (Chl-a) from SeaWiFS and Modis/Aqua, Sea Surface Height Anomaly (SSHA) and eddy kinetic energy (EKE) from from TOPEX and Poseidon ERS-1/2 are used to understand the oceanographic variability in the Southern Java Waters. Analyses were done using empirical orthogonal function (EOF) and wavelet spectrum analysis in order to know spatial and temporal distributions related to the main forcing of the ocean climate variability for the period of January 1997 to December 2008 (12 years). The first EOF modes of Chl-a, SSHA and SST accounted for 42.8%, 36.5%, and 27.4% of total variance, corresponded with interannual signal for all the first modes, respectively. The spatial patterns of the first and second EOF modes of SSHA, SST and Chl-a gave a very typical cold water of SSHA, low SST and high Chl-a concentration located along the southern coast of Indonesian archipelago and warm water of SSHA, high SST and much less Chl-a concentration in the offshore region to make frontal areas along the latitudinal line around 10–12ºS. The results showed that total variance of the first two mode of SSHA, SST, and Chl-a explain 59.94%, 35.52%, and 55.26 %, respectively. These infer that SSHA and Chl-a give more response to the climate variability of El Niño Southern Oscillation (ENSO) forcing in the study area.
    Źródło:
    World Scientific News; 2020, 142; 76-87
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spatio-Temporal Model of Extreme Rainfall Data in the Province of South Sulawesi for a Flood Early Warning System
    Autorzy:
    Bakri, Bambang
    Adam, Khaeryna
    Rahim, Amran
    Powiązania:
    https://bibliotekanauki.pl/articles/1838013.pdf
    Data publikacji:
    2021
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    spatio-temporal model
    extreme rainfall
    province of South Sulawesi
    El Nino South Oscillation
    Indian Ocean Dipole Mode
    Madden-Julian Oscillation
    Opis:
    In this study, we model extreme rainfall to study the high rainfall events in the province of South Sulawesi, Indonesia. We investigated the effect of the El Nino South Oscillation (ENSO), Indian Ocean Dipole Mode (IOD), and Madden-Julian Oscillation (MJO) on extreme rainfall events. We also assume that events in a location are affected by events in other nearby locations. Using rainfall data from the province of South Sulawesi, the results showed that extreme rainfall events are related to IOD and MJO.
    Źródło:
    Geomatics and Environmental Engineering; 2021, 15, 2; 5-15
    1898-1135
    Pojawia się w:
    Geomatics and Environmental Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The analysis of the El Niño phenomenon in the East Nusa Tenggara Province, Indonesia
    Autorzy:
    Karuniasa, Mahawan
    Pambudi, Priyaji Agung
    Powiązania:
    https://bibliotekanauki.pl/articles/2073753.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    climate
    communities
    drought
    El Nino
    freshwater
    rainfall
    Opis:
    Climate change causes various events, such as El Niño , and we experience their larger frequency. This study based on a quantitative approach uses observation data from the Umbu Mehang Kunda Meteorological Station and the Ocean Niño Index (ONI). As a result, East Sumba, which has an arid climate, has more challenges in dealing with drought and water deficits during El Niño. This study identifies rainfall when the El Niño phenomenon takes place in East Sumba through data contributing to the ONI value and dry day series from 1982 to 2019. The analysis was carried out by reviewing these data descriptively and supported by previous literature studies. The research found that there was a decrease in the accumulative total rainfall in El Niño years. The annual rainfall in the last six El Niño events is lower than the annual rainfall in the first six El Niño events. The dry day series is dominated by an extreme drought (>60 days) which generally occurs from July to October. This drought clearly has a major impact on livelihoods and causes difficulties in agriculture as well as access to freshwater. This results in crop failure, food shortages, and decreased income. The phenomenon triggers price inflation in the market and potential increase in poverty, hunger, and pushes the country further away from the first and second Sustainable Development Goals. This phenomenon and problems related to it need to be dealt with by multistakeholders.
    Źródło:
    Journal of Water and Land Development; 2022, 52; 180--185
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Uncertain Seasons in the El Niño Continent: Local and Global Views
    Autorzy:
    Robin, Libby
    Powiązania:
    https://bibliotekanauki.pl/articles/888691.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
    Tematy:
    Australia
    El Niño cycles
    global change
    environment and identity
    eco-fiction
    Janette Turner Hospital
    Jane Harper
    Opis:
    As global climate change shifts seasonal patterns, local and uncertain seasons of Australia have global relevance. Australia’s literature tracks extreme local weather events, exploring ‘slow catastrophes’ and ‘endurance.’ Humanists can change public policy in times when stress is a state of life, by reflecting on the psyches of individuals, rather than the patterns of the state. ‘Probable’ futures, generated by mathematical models that predict nature and economics, have little to say about living with extreme weather. Hope is not easily modelled. The frameworks that enable hopeful futures are qualitatively different. They can explore the unimaginable by offering an ‘interior apprehension.’
    Źródło:
    Anglica. An International Journal of English Studies; 2019, 28/3; 7-19
    0860-5734
    Pojawia się w:
    Anglica. An International Journal of English Studies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variability in fish catch rates associated with Sea Surface Temperature Anomaly (Niño 3.4 index) in the West of Java Sea
    Autorzy:
    Syamsuddin, Mega
    Sunarto, Sunarto
    Yuliadi, Lintang
    Harahap, Syawaludin
    Powiązania:
    https://bibliotekanauki.pl/articles/1076099.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Catch rates
    El Niño
    Java Sea
    La Niña
    oceanographic conditions
    Opis:
    The remotely derived oceanographic variables included sea surface height anomaly (SSHA), sea surface temperature (SST), chlorophyll-a (Chl a) and fish catches are used as a combined dataset to understand the ocean climate variability and further addresses their relations with the fish catches in the West-Java Sea. Fish catches and remotely sensed data are analyzed for the 5 years datasets from 2010-2014 and emphasized the differences of climate conditions during El Niño Southern Oscillation (ENSO) events. Here, we demonstrate the prominent annual variation of two species small pelagic fish catches (Euthynus affinis and Scomberomorus commerson) and one demersal species (Netuma thallasina) as representative of dominant catch in the region. Small pelagic catches had significant increment during El Niño compared to during La Niña events. Changes in oceanographic conditions during ENSO events resulted in perceivable variations in catches, with an average catches of 839.6 t (E. affinis) and 273,7 t (S. commerson) during El Niño. During La Niña event catch rates were reduced with an average catches of 602.6 t (E. affinis) and 210.3 t (S. commerson). During the La Niña event was less favorable for small pelagic catches. In contrast, N. thallasina does not seem to be directly affected by the ENSO. The average catches of N. thallasina during El Niño (182.17 t) lower than during La Niña (250.14 t). This inferred that different climate events might cause different oceanographic conditions that related to fish biodiversity. Our results would benefit the fish biodiversity-management to reduce risks due to climate regimes.
    Źródło:
    World Scientific News; 2019, 117; 175-182
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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