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    Wyświetlanie 1-10 z 10
    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:
    Catch of Skipjack Tuna (Euthynnus sp.) in National Fisheries Port Pengambengan, Bali, Indonesia
    Autorzy:
    Apriliani, Izza Mahdiana
    Rizal, Achmad
    Hamdani, Herman
    Denika, Ayang
    Powiązania:
    https://bibliotekanauki.pl/articles/1065114.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Bali strait
    Euthynnus
    Thunnus albacares
    Thunnus obesus
    bigeye tuna
    catch per unit effort
    monsoon
    tuna
    yellowfin tuna
    Opis:
    The Bali Strait has very high pelagic fish resources, ranging from small pelagic fish to large pelagics, one of which is a type of tuna. Skipjack tuna (Euthynnus sp.) is one of the dominant and high economic value fish resources. The composition of fish catch landed in National Fisheries Port (PPN) Pengambengan in 2014 is dominated by small pelagic fish. The composition of the largest fish catches consists of lemuru, skipjack, mackerel and scad. This study aims to look at the production of skipjack tuna and season distribution for 5 years. This information can be used as an effort to manage fisheries in PPN Pengambengan continuously. This research was carried out in the waters of the Bali Strait with fishing base PPN Pengambengan. The catch of skipjack tuna in Bali is fluctuated every month during 2013 until 2017. The average catch is high in 2014, and the lowest catch was in 2016. This was allegedly due to the catches of previous years namely in 2014 – 2015 skipjack tuna fish resources were overexploited. The catch of skipjack tuna based on the season has the highest value in September - November (transition II (intern-monsoon)) and the lowest is in December-February (northwest season).
    Źródło:
    World Scientific News; 2019, 120, 2; 144-153
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Inter-annual and seasonal patterns of precipitable water vapour over Malaysia from 1990-2019 based on MERRA-2 reanalysis
    Autorzy:
    Makama, Ezekiel K.
    Lim, Hwee S.
    Powiązania:
    https://bibliotekanauki.pl/articles/35524412.pdf
    Data publikacji:
    2021
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    total precipitable water vapour
    MERRA-2
    monsoon
    reanalysis
    Opis:
    In this study seasonal and inter-annual patterns as well as trend in the total precipitable water vapour (TPW) over Malaysia, based on a 30-year data from MERRA-2, have been evaluated using least square regression method. Indicator TPW revealed a pair of minima in February/August and maxima in May/November with highest and lowest long-term means found in East Malaysia. Long-term seasonal variability of TPW exhibited latitudinal dependency in both the NEM and SWM seasons. Indicator TPW showed respective southeast-northwest and southwest-northeast spatial distribution in West and East Malaysia, with the highest statistically significant positive trend found in the former.
    Źródło:
    Scientific Review Engineering and Environmental Sciences; 2021, 30, 1; 208-218
    1732-9353
    Pojawia się w:
    Scientific Review Engineering and Environmental Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocean Currents, Temperature, and Salinity at Raja Ampat Islands and The Boundaries Seas
    Autorzy:
    Nugraha, Angga P.
    Purba, Noir P.
    Junianto, Junianto
    Sunarto, Sunarto
    Powiązania:
    https://bibliotekanauki.pl/articles/1163118.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Indonesian Seas
    Monsoon
    Pacific Ocean
    Physical Condition
    T-S Diagram
    Opis:
    Raja Ampat Islands and eastern seas influenced by water masses from the Pacific Ocean and the monsoon. The aim of the research is to study the physical condition of water column, movement, and identification of water sources. The method used in this study with spatial and temporal analysis. The results show that water movement through Raja Ampat, Halmahera, Ceram, and Banda Seas. Mix layer condition up to 71 m depth and thermocline layer up to 567 m depth. The identified water masses from T-S Diagram are SPIW (South Pacific Intermediate Water), SPSW (South Pacific Subtropical Water), NPSW (North Pacific Subtropical Water), and AAIW (Antartic Intermediate Water). The maximum SST value occurred at the end of west monsoon (February) in the range 28.25 °C - 30.5 °C, and the minimum value occurred at the end of east monsoon (August) in the range 26.25 °C - 29.25 °C. The maximum SSS value occurred at early monsoon transition 2 (September) in the range 34.25 psu - 34.75 psu, and the minimum value occurred at early monsoon transition 1 (March) in the range 32.75 psu - 34 psu.
    Źródło:
    World Scientific News; 2018, 110; 197-209
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Orographic barrier of the Great Himalayas
    Autorzy:
    Zgorzelski, Marek
    Mikulska, Małgorzata
    Powiązania:
    https://bibliotekanauki.pl/articles/2028872.pdf
    Data publikacji:
    2004-06-01
    Wydawca:
    Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
    Tematy:
    geoecology
    high mountains
    monsoon
    Opis:
    The entire geographical literature, starting with school textbooks, presents the Himalayas as a classical model of an impermeable orographic barrier, halting the masses of monsoon air and causing aridity of the Tibetan landscapes. Despite of that, however, the author, during his trips to Western and, particularly, to Central Tibet, organised exactly during the summer monsoon, always found the southern regions of these provinces flooded to a large extent with water. It is also puzzling that catastrophic floods occurring in China (connected with the high water in rivers originating in Tibet) are correlated in time with the period of the summer monsoon in the Himalayas.
    Źródło:
    Miscellanea Geographica. Regional Studies on Development; 2004, 11; 71-74
    0867-6046
    2084-6118
    Pojawia się w:
    Miscellanea Geographica. Regional Studies on Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seasonal variation in elemental composition of certain seaweeds from Mandapam and Kilakarai coast, Gulf of Mannar biosphere reserve
    Autorzy:
    Thillaivasan, Muthukumarasamy
    Kumar, Kaliyamoorthy
    Silvakumar, Kathiresan
    Powiązania:
    https://bibliotekanauki.pl/articles/1075507.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Gracilaria corticata
    Gracilaria verrucosa
    Grateloupia filicinia
    Gulf of Mannar
    Post monsoon
    Pre-monsoon
    SEM-EDS
    Sargassum wightii
    Seaweeds
    Stoechospermum marginatum
    Summer
    monsoon
    Opis:
    Vegetative plants of certain seaweeds were collected from the natural habitat of Kilakarai and Mandapam coast were subjected to SEM-energy dispersive spectroscopic analysis and quantified the following minerals viz., Na, Mg, Si, S, Cl, K, Ca, Mn, P, Fe, Zn and Cr during summer, pre-monsoon, monsoon and post-monsoon seasons in 2007-2008. The order of preferential accumulation of elemental composition during summer 2007 in Sargassum wightii: Ca > Mg > Na > S > Fe > Si > Cl > K > Mn; Stoechospermum marginatum: Ca > Si > S > Mg > Mn > P > Na; Gracilaria corticata: Ca > Mg > Na > Si > Cl > S > Mn > K > Fe > P; Gracilaria verrucosa: Ca > Cl > Si > Mg > Na > P > S > Mn > Fe > K and Grateloupia filicinia: Ca > Cl > P > Si > Na > Cr > K. Seasonal distribution of elemental composition in the seaweeds showed that most of the minerals were high during the summer followed post-monsoon and monsoon seasons. This could perhaps be due to an ambient concentration of these minerals was high during these seasons thereby facilitating their uptake by seaweeds.
    Źródło:
    World Scientific News; 2019, 129; 147-160
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sensitivities of the Tiedtke and Kain-Fritsch Convection Schemes for RegCM4.5 over West Africa
    Autorzy:
    Adeniyi, Mojisola Oluwayemisi
    Powiązania:
    https://bibliotekanauki.pl/articles/108457.pdf
    Data publikacji:
    2019
    Wydawca:
    Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
    Tematy:
    convective precipitation
    West African monsoon
    Kain-Fritsch convection scheme
    Tiedtke convection scheme
    African easterly jet
    Opis:
    Realistic simulation of weather and climate parameters over West Africa is daunting, so the performance of the Tiedtke and Kain-Fritsch convection schemes within version 4.5 of the Regional Climate Model (RegCM4.5) of the International Centre for Theoretical Physics, Trieste is evaluated over West Africa for improved simulation. The two schemes are compared to two traditional mixture schemes (Grell on land and Emanuel on Ocean), outperforming the mixture schemes with reduced magnitude and spatial coverage of dry bias. Both schemes simulate precipitation over West Africa with a low dry bias, however, the Kain-Fritsch convection scheme simulates more realistic precipitation in the West African convective environment. This is associated with the inclusion of a variable cloud radius and the convective available potential energy closure for the Kain-Fritsch in contrast to a fixed cloud radius and moisture convergence of the of the Tiedtke scheme. The simulated outgoing longwave radiation and omega lend support to the spatial variations and amount of simulated precipitation in the different areas by the schemes. The spatial variation of simulated temperature over the target region shows lower bias than precipitation by all the convection schemes. Soil moisture is more accurately simulated (correlation coefficient ~1) in the savannah (8-10°N) and Sahel (22-28°N) environments by all the convection schemes. Tiedtke performs the most accurate simulations of the pattern and profile of zonal wind which controls climate circulation, with slightly weaker simulations of the Africa easterly jet with core magnitude less than 10 m·s-1. The accuracy of the KF and Tiedtke in RegCM4.5 in simulating the climate of West Africa is documented for the first time for application in future studies over the region.
    Źródło:
    Meteorology Hydrology and Water Management. Research and Operational Applications; 2019, 7, 2; 27-37
    2299-3835
    2353-5652
    Pojawia się w:
    Meteorology Hydrology and Water Management. Research and Operational Applications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spatial and temporal precipitation trends of proposed smart cities based on homogeneous monsoon regions across India
    Autorzy:
    Singh, Lakhwinder
    Khare, Deepak
    Mishra, Prabhash K.
    Pingale, Santosh M.
    Thakur, Hitesh P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1844405.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    smart city
    trend
    modified Mann–Kendall test
    MMK
    monsoon homogeneous regions
    India
    Opis:
    The conservation of rainwater and augmentation of groundwater reserve is necessary to meet the increased water demands. Precipitation occurring in the smart cities need to be understood for a better water management action plan. Therefore, monotonic precipitation trend analysis was performed for eight smart cities drawn from six monsoon homogeneous regions across India. The precipitation data were investigated for trends using the modified Mann–Kendall (MMK) test and Sen’s slope estimator at annual, seasonal and monthly scales. The trend analysis was carried out over 118 years (from 1901 to 2018) at 95% significance level. The Dehradun city (Northern Himalayan region) showed a significant increasing annual precipitation trend (Z = +3.22). Indore and Bhopal cities from West Central region showed significant increasing annual trend (Z = +2.01) and non-significant decreasing annual trend respectively. Although, Vadodara and Jaipur are lying in the same Northwest region, the trends are opposite in nature. Jaipur city showed a significant increasing annual pre-monsoon trend (Z = +2.44). The winter rainfall in the city of Vadodara is showing a significant decreasing trend (Z = –2.16). The pre-monsoon rainfall in Bhubaneswar (Central Northeast region) and monsoon precipitation in Trivandrum (Peninsular region) are showing significant increasing (Z = +2.56) and decreasing (Z = –2.71) trends, respectively. A non-significant decreasing trend was seen in Guwahati city (Northeast region). The eight smart cities selected for investigation are not truly representing the entire country. However, the study is clearly pointing towards the regional disparity existing in the coun-try. These findings will be helpful for water managers and policymakers in these regions for better water management.
    Źródło:
    Journal of Water and Land Development; 2020, 47; 150-159
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The interaction between local factors and the Convectively Coupled Equatorial Waves over Indonesia during the Western North Pacific and Australian monsoon phase
    Autorzy:
    Pramuwardani, Ida
    Sunarto, Hartono
    Sopaheluwakan, Ardhasena
    Powiązania:
    https://bibliotekanauki.pl/articles/108463.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
    Tematy:
    Convectively Coupled Equatorial Waves
    Kelvin waves
    local factor
    monsoon
    Indonesia
    Opis:
    A large scale perturbation by the Convectively Coupled Equatorial Waves (CCEW) is often observed in the tropics as a precursor to influence weather condition, for example over the Indonesian archipelago (Maritime Continent (MC)). This study examines the interaction between local factors and CCEW with regard to convection and vertical interferences on a local scale over Indonesia during extreme Western North Pacific (WNP) and Australian (AU) monsoon phases. Through space-time spectra analysis of a 15 year (2001-2015) Tropical Rainfall Measuring Mission (TRMM) 3B42 dataset, the propagation of CCEW, i.e. Kelvin, Equatorial Rossby (ER) and Mixing Rossby-Gravity (MRG) waves was assessed. An Empirical Orthogonal Function (EOF) 1 and 2 for each wave evolution across the region of Indonesia, was then compared with daily precipitation anomalies and multilevel wind observations from seven locations in Indonesia to assess the interaction between local factors and CCEW. Results suggest there is evidence of local convection associated with Kelvin waves in the afternoon through to the evening in Tangerang, Surabaya and Makassar during WNP monsoon phases. Local convection associated with MRG waves only occurred in Makassar at the last evolution day during the same period, while there is no clear evidence for an interaction between local factors for ER waves. Low-level westerly winds appear to be significantly coupled with convection from Kelvin waves in Tangerang, Surabaya, and Makassar during the WNP monsoon phase, while the interaction is less significant for MRG-coupled convections (except in Makassar during the same monsoon phase) and absent for ER waves. This study suggests that the global scale phenomena of the Kelvin wave is associated with local scale factors in controlling convection, particularly during an extreme WNP phase in Indonesia.
    Źródło:
    Meteorology Hydrology and Water Management. Research and Operational Applications; 2020, 8, 1; 84-89
    2299-3835
    2353-5652
    Pojawia się w:
    Meteorology Hydrology and Water Management. Research and Operational Applications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Upwelling session in Indonesia waters
    Autorzy:
    Purba, Noir P.
    Khan, Alexander M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1076677.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    coastal area
    economic exclusive zone
    periodic monsoon
    satellite data
    upwelling
    Opis:
    The aim of this research was to analyze monthly sea surface temperature (SST) and chlor-a satellite data for 16 years from 2003 in an area from south Java to north Papua. The results show that the temporal and spatial pattern of SST and chlor-a distribution strongly was related to the monsoonal pattern. The upwelling session starts from May and ends in the October, in the south-east monsoon season. The lowest SST (25-30 °C) and the highest chlor-a (2.23 mg/l) is found in August in the south-east monsoon season. In addition, the largest upwelling area occurs in July, and ranges within 790,221 km2 of size.
    Źródło:
    World News of Natural Sciences; 2019, 25; 72-83
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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