bluuebunny/crossref_metadata_2025_split huggingface dataset:
Accuracy assessment of heavy rainfall forecasting in the Western Caucasus with ICON-Eu regional atmospheric model for short-term flood forecasting
Authors: Belyakova P A , Shikhov A N , Perminov S I , Moreydo V M. 
Published: December 2020

Abstract
Heavy rainfalls and rain-induced floods regularly cause substantial damage in the Western Caucasus region. In this study, we assess the accuracy of heavy rainfall forecasting with ICON-Eu regional atmospheric model (developed by the weather service of Germany) and the possibility of its use as input data for rain flood prediction. The main conclusion is that the forecast accuracy is strongly determined by the nature of the rainfall in question (mainly convective or triggered by synoptic-scale processes) and the season of the year. The ICON-Eu model systematically underestimates (by 2-3 times) the precipitation amount in the warm season (April-September) and almost never reproduces local convective heavy rainfall events. Therefore, its forecasts for short-term prediction of summertime rain floods have low efficiency. On the other hand, in the cold season (October-March) the model adequately reproduces heavy precipitation events, with some underestimation of the maximum precipitation amount and overestimation of the coverage area. These forecasts can be used to improve the short-term prediction of flash floods on the rivers of the Black Sea coast of the Caucasus during the period from October to March. In addition, we have performed a detailed analysis of the heavy rainfall and a related flood event which occurred on August 17-18, 2019 by comparing hourly observed precipitation with ICON-Eu and Cosmo-Ru forecasts, as well as applying WRF simulation and rainfall-runoff modelling.
New methods for the study of hydrometeorological metric data systems: the experience of Kazan Federal University
Authors: Sabirova M V , Bakanin A S , Korotkova N V 
Published: December 2020

Abstract
A new technology is analysed: a mobile application that allows one to process images and recognize various objects of hydrometeorological metric data systems. As an example, the results of real image processing by the application are shown. Recommendations for the use of this method in different focus areas of hydrometeorology are given.
Automatic weather station Arctic Meteo: first field test results
Authors: Korolkov V A , Kobzev A A , Tikhomirov A A , Telminov A E , Pustovalov K N , Bogushevich A Ya , Kalchikhin V V , Kurakov S A 
Published: December 2020

Abstract
A technical description of an experimental sample of an automatic weather station (AWS), ArcticMeteo, designed to operate in remote and hard-to-reach areas under extreme climatic conditions is presented. The AWS provides measurements of some basic and specific meteorological parameters. Since the beginning of 2020, the AWS has been tested in real and critical conditions at the IMCES SB RAS meteorological site. Results of measurement of meteorological parameters during a storm in Tomsk on 26 May 2020 are given.
Web-based service for prediction of thermal comfort conditions in large administrative centers of the Russian Federation
Authors: Kakovkina A G , Martynova Yu V , Konstantinov P I 
Published: December 2020

Abstract
This paper discusses the problem of thermal comfort in cities of the Russian Federation. The average person is faced with environmental conditions that are beyond his control. In residential areas associated with permanent population, a more comfortable thermal state is achieved by architectural and urban planning methods. For scientific assessment of thermal comfort, indices have been developed, the Physiological Equivalent Temperature (PET) and the Universal Thermal Climate Index (UTCI), taking into account many factors. These are completely new indices, and there are no statistical regular data available in Russia during the recent ten years. Calculations are made to obtain bioclimatic indices and characteristics of selected cities for further assessment of the comfort of cities and their comparison. In addition, this paper describes a project http://heat2020.ru «Heat in Russian Cities». The main aim and methods of the project are given, and forecasts of comfort for Moscow in direct sunlight and in shade conditions are compared and analysed.
Seasonal wave characteristics in Southern Bali Waters in 2014
Authors: Kuntoro W S , Ningsih N S , Rachmayani R 
Published: December 2020

Abstract
Seasonal characteristics of wave height in Southern Bali waters (SBW) in 2014 was simulated using SWAN (Simulating Wave Nearshore) model with the resolution of 1/216° (0.51 km). The model was forced using Cross Calibrated Multi Purposed (CCMP) wind data with resolution 1/4° (27.75 km) and 1/600° (0.18 km) bathymetry data derived from Batimetri Nasional (BATNAS) provided by Geospatial Information Agency (BIG). The result shows that the highest (lowest) seasonal average of Significant Wave Height (SWH) in the SBW in 2014 during east (west) monsoon or JJA (DJF) in June-July-August (December-January-February) months was about 2.2 m (1.4 m). Meanwhile, SWH during the first (second) transitional monsoon or MAM (SON) in March-April-March (September-October-November) months was about 1.7 m (2.1 m). The 2D spectrum analysis exhibits that seasonal wave characteristic in the study region was dominated by swell propagation from the Indian Ocean (IO) associated with the Gallian Cyclone. Corresponds to the SWH, seasonal average of wave energy spectrum during east monsoon (JJA) shows the highest value up to 0.0038 m2s/deg compared to the other seasons.
Preliminary Study of Ocean Acidification: Relationship of pH, Temperature, and Salinity in Ohoililir, Southeast Maluku
Authors: Rugebregt M.J. , Nurhati I.S. 
Published: December 2020

Abstract
Changes in pH, temperature, and salinity in seawater can indicate the occurrence of ocean acidification. The purpose of this research was to study changes in acidity that occur in Ohoililir waters, Southeast Maluku, which is part of the Banda Sea. This research was conducted in March 2019 as a study of the prefix of oceanic equities in the Southeast Maluku region which is part of the Banda Sea which is currently one of the priority researches in Indonesia, and sampling at 10 points. The results obtained were pH average of 8.69, temperature average of 29.74°C, and salinity of 33.23. The correlation between pH and temperature is -0.097 and the correlation between pH and salinity is in the range of -0.054 which indicates a very weak relationship between pH and temperature and salinity. Besides, pH has a negative correlation to temperature and salinity. This shows the need for further research on the relationship between these three or more parameters to see the effect on the ocean.
Numerical Modeling of Currents Circulation in Balikpapan Bay during Oil Spill Event on March 31, 2018
Authors: Nur A A , Radjawane I M , Suprijo T , Mandang I 
Published: December 2020

Abstract
The coastal area in Balikpapan Bay and its surrounding area has been devastated after the burst of an underwater oil pipe at the bay on March 31st, 2018, and the crude oil still continues spreading for a few days later. A three-dimensional hydrodynamic model is used to simulate the currents dynamic and investigate the influence of the current circulation on the spreading of the oil spill in Balikpapan Bay from March 31th to April 15th, 2018, to cover the event i.e. several weeks after the oil spill incident. Model results are validated by calculating the RMSE, MAPE and model skill using water level between available observation data at Semayang Port, Balikpapan station and numerical model from October 1st, 2012 to January 1st, 2013. Verification result of tidal elevation data from observation and model prediction shows a good agreement with RMSE = 7.8 cm, MAPE = 14.3% and model skill = 0.995. Surface currents circulation in Balikpapan Bay can be distinguished by the currents pattern on the spring tide and neap tide condition. During the spring tide condition, the surface currents mostly move to the east after coming out from the bay. However, the surface currents are strongly going southward after come out from the bay on the neap tide condition. Based on the satellite images captured for the next days after the event, the spreading pattern of the oil spill seems to be matched to the pattern of surface currents circulation on the spring tide condition. From the analysis of the model result, it shows that the currents circulation playing the main role to disperse the oil spill in Balikpapan Bay towards the Makassar Strait.
Identification of Tidal Current Vertical Structure in Ombai Strait and Timor Passage
Authors: Beliyana E , Radjawane I M , Susanto R D 
Published: December 2020

Abstract
Indonesian seas are strongly affected by strong semidiurnal tidal signals from the Indian Ocean and diurnal signals from the Pacific Ocean. Therefore, within the internal seas, there is possibility of mixed tides (semidiurnal and diurnal signals). This research is focused on determining tidal current based on the velocity data measured during the INSTANT (International Nusantara Stratification and Transport) program. The velocity data from Ombai Strait and Timor Passage from January 18, 2004 to December 31, 2004 are analyzed. Characteristics of tidal current data at certain fixed depths (50, 100, 350 and 750 meters) are processed and calculated using MATLAB software and present the magnitude and variability of total currents, residual currents, and tidal currents as well as vertical variability at these straits. In Ombai Strait and Timor Passage currents tend to move zonally (east – west). The dominant tidal currents are observed at 350 and 750 meters, while subtidal (nontidal) current dominant occurs with 50 to 150 meters.
Extreme Wave Height Analysis in Natuna Sea Using Peak-Over Threshold Method
Authors: Jabbar Ismail Abdul , Ningsih Nining Sari 
Published: December 2020

Abstract
Extreme wave height analysis has been conducted in Natuna Sea, Indonesia, using 25 years (1991-2015) significant wave height (SWH) data from WAVEWATCH 3 (WW3) with a spatial resolution of 1/8°. The Natuna Sea is geographically connected to South China Sea (SCS) and is often crossed by tropical cyclones. These cyclones may have contributed to the existences of high waves in the SCS, which can propagate as swell waves to the Natuna Sea and can lead to extreme waves in this region. The extreme analysis has been done by classifying extreme events of SWHs using Peak-Over Threshold (POT) method with a fixed threshold level at quantile 0.93 and a minimum time separation of 48 hours between two successive extreme events. Furthermore, Generalized Pareto (GP) distribution has been applied to estimate return values of the extreme SWHs for several return periods. Parameters of the GPD have been estimated by Maximum Likelihood Estimation (MLE) method.
Characteristics of extreme SWHs in the Natuna Sea have been explained by maximum and seasonal distribution plots. The maximum value of extreme SWHs in the SCS can reach 13 m and around 3-5 m in the Natuna Sea. The seasonal distributions of extreme waves indicate that the occurrences of extreme waves in the SCS during Northeast Winter Monsoon (NWM) are higher than those during Southwest Summer Monsoon (SSM). Seasonal mean and maxima of extreme SWHs in the Natuna Sea are also high during the NWM and low during the SSM.
To examine the effects of swell waves from the SCS and also future extreme waves in the Natuna Sea, we have analyzed the characteristics and calculated return values of extreme waves in front and behind of Bunguran Island, which the former faces directly to the SCS. There were 172 (331) extreme waves from 1991-2015 in the front (behind) of Bunguran Island and mainly from the northeast (southwest). Most of them were around 2 – 4 (0.5 – 2) m with mean periods of 6 – 10 (3 – 6) s. Based on the return values in the front (behind) of the Bunguran Island, there are possibilities of extreme waves with values 4.70, 4.87, and 4.96 (2.08, 2.20, and 2.27) m for return periods of 25, 50, and 75-year, successively.
Substrate Types on Habitat Breeding Embryonic Development and Larval Morphometric of Sea Urchin Tripneustes gratilla (Linnaeus 1758)
Authors: Radjab Abdul Wahab , Baszary Chomsa Dintasari Umi , Lekatompessy Vanela Chatrin , Purbiantoro Wahyu 
Published: December 2020

Abstract
Hatchery is the main factor that plays an important role in aquaculture sea urchin Tripneustes gratilla (Linnaeus 1758). The quality of sea urchin egg is determined by the absorption of nutrients that carried throughout the gonad development while the quality of nutrients is very likely influenced by the type of food consuming. This research of substrate types on habitat breeding embryonic development and larval morphometric of sea urchin had been done on October - November 2016 at the laboratory of marine, Research Center for Deep Sea, Indonesia Institute of Sciences, Ambon. The Samples taken from three different habitats comprises Hative Besar, Liang and Suli beach. The purpose of this research is to determine the effects of substrate types on habitat breeding embryonic development and larval morphometric of sea urchin. The method that has been used to determine the morphometric was done by measuring the diameter and height of the shell using a digital caliper and total body weight using a digital scale. To observe embryonic development and larval morphometric done by in vitro fertilization through eggs selection then cultured in petri dish at a density of 10ind/ml. The result of this research is the most dominant quantity of embryonic development (72 hours) indicated by culture vessel from Hative Besar meanwhile the least is indicated by Liang. The greatest larval morphometric is indicated by culture vessel from Hative Besar with length and height of larval body further the larval of culture vessel from Hative Besar shown ossification formation.
Description and identification of tuna larvae based on genetic and morphological analysis
Authors: Romdon A , Sembiring A , Pertiwi N P D , Malik M D A , Pay L , Hehuwat Y , Satrioajie W N 
Published: December 2020

AbstractBiological information of tuna larvae is essential for understanding spawning ground and time. However, morphological identification of fish larvae is difficult and questionable. Meanwhile, genetic identification is useful and helpful to confirm the morphological identification result. This study purpose is to confirm a morphological identification result with genetic identification and determine the tuna species exactly. Specimens were obtained from a survey conducted in the Banda Sea in October 2018. Samples were collected by a bongo net towed obliquely. The result of morphological identification is showed that the larvae having 37 to 42 myomeres, preopercular spine developed, moderate in-depth, moderate to large head and eyes identified asThunninilarvae. The morphological result is supported by the genetic result, even though the larvae are not from the genus ofThunnus. The samples were identified asKatsuwonus pelamis, Euthynnus affinis, andPetenia splendida. The intraspecific pairwise genetic distance for each species ofK. pelamis, E. affinis, andP. splendidais 4.4 %; 0.5 %; and 22.3%, respectively. Meanwhile, the average pairwise genetic distance between the three species ranges from 16.2% to 33.3%.
Characterization of S-Acyltransferase Gene Fragment from an Isolate of Tropical Marine Microalgae Chlorella vulgaris CBI
Authors: Purnaningtyas D W , Aryantha I N P , Nurachman Z , Rachmayanti Y 
Published: December 2020

Abstract

S-Acyltransferase gene (pat) encodes a protein acyltransferase (PAT) that acts as an enzyme catalyzing an acyl chain transfer to the molecular acceptor, mono- or di-acylglycerol, in the biosynthesis of triacylglycerol (TAG). To date, pat from tropical marine microalgae has yet to be explored. Here, we identified a marine microalgae isolate (CBI) based on its physical morphology and 18S rRNA gene, then we isolated the pat fragment by reverse transcription (RT) PCR, followed by ligation into pGemT vector and cloning in E. coli TOP10. The pat fragment was characterized using several DNA analysis softwares. Our results showed that the isolate CBI obtained from Maluku waters was green-colored and spherical in shape with a cell diameter of 2–10 μm. A 1644-bp of 18S rRNA gene was obtained and showed a 99% nucleotide sequence similarity with 18S rRNA gene of Chlorella vulgaris (GenBank no. KF574391.1). The microalgae isolate was identified as Chlorella vulgaris CBI. Reverse transcription produced a 600-bp cDNA, in which the first 300-bp nucleotide was unidentified, however starting from nucleotide no. 301 to the end, it showed a 51% identity with the pat fragment of Chlorella variabilis (GenBank no. XP_005849764.1). A 77-residue peptide chain deduced was identified as the first N-terminus of PAT (domain transporter protein). This pat fragment of Chlorella vulgaris CBI was useful as a starting point to isolate and characterize the whole pat sequence.
Spatial Study of Indonesia’s Historic Bay: A Case Study in Tomini Bay
Authors: Rachma Tia Rizka N , Windiastuti Rizka 
Published: December 2020

Abstract
To become a global maritime axis, Indonesia needs to strengthen the security of its maritime region. Indonesia has adopted the United Nations Convention on the Law of the Sea (UNCLOS) to determine its water boundaries. One of the points in UNCLOS that has not been implemented in Indonesia is related to internal waters. Until now Indonesia has not yet determined the extent of its internal waters. This study aims to examine the potential of Tomini Bay as a historical bay, especially spatial terms so that it will increase the area of Indonesia’s internal waters. The methods used were literature study of the cases in other countries, determination of the area, and extensive calculations using basic data on topographic maps of Indonesia (Peta Rupabumi Indonesia/RBI), such as toponym data, and coastline data. Based on this study, Tomini Bay has an area of 56,948.51 km2, but according to UNCLOS it is not a juridical bay since the width of its opening is more than 24 nautical miles. Some small juridical bays in the Tomini region have an accumulative area of 418.49 km2, only about 0.73% of the Tomini area. In order for Tomini Bay to meet the provisions of UNCLOS as a bay, Indonesia needs to define Tomini Bay as a “historical bay”, because in this study it was found the defining potential. By recognizing Tomini as a historical bay, Indonesia can change the status of the waters inside it from archipelagic waters to internal waters, so that Indonesia’s authority over the region becomes stronger.
Mooring Analysis of SPAR Type Floating Offshore Wind Turbine in Operation Condition due to Heave, Roll, and Pitch Motions
Authors: Prastianto Rudi W. , Ramzi  , Murdjito  
Published: December 2020

Abstract
In Indonesia, one of the regions that have good potential for Floating Offshore Wind Turbine (FOWT) installations is the Natuna Sea which has a fairly good average wind speed in the range of 10.0 - 15.0 m/s. In addition, the Natuna Sea has a water depth of around 50-250 m with relatively mild wave height. This condition is a suitable environment for the installation of the FOWT. Therefore, it is necessary to investigate the appropriate mooring system configuration due to the motion of the structure. This paper examined the analysis of mooring system of the SPAR type FOWT structure due to its global motion through numerical modelling by using open source software FAST. The analysis was carried out for operation condition, by varying three configurations of the mooring system for the direction of environmental loads (waves and winds), namely 0 degrees (perpendicular in front of the turbine), 45 degrees, and 90 degrees (the turbine side direction) and wind speed. With the scope of such analysis, it could be properly examined the mooring system due to the global motion of heave, roll and pitch of the Spar.
Characteristic of Wave Run-up on Schematic Precast System (SPS) Revetment
Authors: Ginting Juventus W R , Simanjuntak Eduardo Meyrianso , Putra Ida Ayu Irawati Diah Ratna , Eliasta Leo 
Published: December 2020

Abstract
Revetment Sistem Panel Serbaguna (SPS) or Schematic System Precast (SPS) Revetment is latest innovation of SPS technology. It has been applied for various area of civil engineering such as bridge, dams and irrigation channel. For this upgrading, SPS has been tested in Hydraulic Laboratory of Experimental Station for Coastal Engineering Ministry of Public Works and Housing as revetment. SPS is tested with 14 scenarios of various wave steepness and water depth to determine the wave run-up characteristic. All hydraulic performance of SPS for each scenario is recorded with video camera. Using image processing technique, we calculate the wave run-up height for each scenario. From all scenarios, the wave run-up only happen in scenarios with water depth of 0.65 m while the rest only experience wave overtopping. Comparing to the classical Iribarren Number graph, relative wave run-up height on SPS revetment is higher than other type of revetment such as Riprap Arhens, Riprap Gunbak, Batu Pecah, Qudripod, Dolos and Tetrapod but below Sisi Miring. For Sisi Miring Revetment, the maximum relative wave run-up height (Ru/Hm0) is 2.5 for Iribarren Number (Ir) = 2.5 as for SPS revetment, it is approximately 2.4 for Ir = 11.
Progress in Research on Drilling Safety of Natural Gas Hydra te Formation
Authors: JingxuanMa  
Published: December 2020

Abstract
With the development of its economy and society in recent years, China’s demand for energy is increasing. Traditional energy such as coal and petroleum can no longer meet the needs of China’s economic development, because it is very easy to cause environmental pollution in the process of traditional energy reuse. In recent years, China has begun to explore, develop and utilize marine natural gas hydrates, which can achieve better energy effects in use and reduce environmental pollution. However, there are great difficulties in the exploration and development of marine natural gas hydrates and safety issues in the process of drilling the formation. In the process of research, based on the extensive research on the safety of marine gas hydrate drilling at home and abroad, this paper discusses and summarizes the safety problems encountered in Dacheng drilling, and organizes the research on the drilling safety issues of marine gas hydrate formation, providing reference for future research.
Research on the impact of industrial agglomeration on industrial green efficiency from the perspective of big data
Authors: Wang Guanyi 
Published: December 2020

Abstract
This paper uses the data of labor force, capital, all kinds of energy input, industrial pollutant emissions and output value of industries in 30 provinces and autonomous regions of China from 2011 to 2015, and uses big data and data envelopment analysis to calculate the industrial green efficiency of provinces and cities in China. At the same time, in order to explore the relationship between industrial agglomeration and industrial green efficiency, the panel regression model is used to conduct quantitative analysis. The results show that: whether from the national level or the eastern, central and western regions, industrial agglomeration can significantly promote the improvement of industrial green efficiency. Environmental regulation, industrial enterprise scale and other control variables can also significantly promote the improvement of industrial green efficiency in some areas, but not in some areas.