bluuebunny/crossref_metadata_2025 huggingface dataset:
Pengaruh Kualitas Produk dan Kualitas Pelayanan Terhadap Kepuasan Konsumen Pada PT. FCS RGP Plastic Di Kota Batam
Authors: Hendy Hendy , Khoiri M.Khoiri
Published: March 2023

Perekonomian yang ada pada Indonesia, dituntut untuk lebih berkembang dalam menjalankan kegiatan ekonomi. Terdapat satu perusahaan yang bernama PT FCS RGP Plastic yang didirikan di Kota Batam sejak tahun 2019. Perusahaan ini dikenal sebagai perusahaan produksi skala besar yang mengintegrasikan gulungan plastik. Konsumen pada perusahaan mengalami penurunan sejak awal tahun 2021 dikarenakan produk yang ditawarkan ada yang reject berarti pengujian kelolosan standar produk pada perusahaan masih kurang maksimal sehingga mengakibatkan pandangan buruk oleh konsumen mengenai kualitas produk perusahaan. Adanya proses komunikasi yang kurang lancar bersama customer service sehingga mengalami kesalahan dalam bertransaksi sehingga mengakibatkan keluhan oleh konsumen mengenai kualitas pelayanan buruk yang dimiliki perusahaan. Penjualan yang menurun yang diakibatkan kepuasan konsumen yang kurang maksimal. Populasi yang diambil oleh peneliti adalah seluruh konsumen yang ada pada PT FCS RGP Plastic berjumlah 143 konsumen. Teknik sampel penelitian ini yakni sampel jenuh, di mana pengambilan sampel memakai keseluruhan populasi. Disimpulkan sampelnya berjumlah 143 responden. Hasil menyatakan kualitas produk dan kualitas pelayanan berpengaruh positif dan signifikan secara parsial terhadap kepuasan konsumen pada PT FCS RGP Plastic. Pada uji F menyatakan kualitas produk dan kualitas pelayanan secara simultan rpengaruh positif dan signifikan kepuasan konsumen pada PT FCS RGP Plastic.

The existing economy in Indonesia is required to be more developed in carrying out economic activities. There is one company named PT FCS RGP Plastic which was established in Batam City since 2019. This company is known as large-scale production company that integrates plastic. Consumers at the company have decreased since the beginning of 2021 because some of the products offered are rejected, meaning that the testing of product standards at the company is still not optimal, resulting in bad view by consumers regarding the quality of the company's products. The existence of a communication process that is not smooth with customer service so that they experience errors in transactions resulting in complaints by consumers about the poor service quality of the company. Decreased sales caused by less than optimal customer satisfaction. The population taken by the researchers were all consumers at PT FCS RGP Plastic totaling 143 consumers. The sampling technique of this research is the saturated sample, where the sampling uses the entire population. It was concluded that the sample amounted to 143 respondents. The results state that product quality and service quality have a positive and partially significant effect on consumer satisfaction at PT FCS RGP Plastic.
Analisis Rasio Keuangan Dalam Memprediksi Pertumbuhan Laba Pada Pdam Tirta Dhaha Kota Kediri
Authors: Nadanu Layung Puspo , Isnaniati Siti , Selviasari Rike
Published: March 2023

Abstrak

Penelitian ini merupakan penelitian desktiptif kuantitatif yang dilakukan pada Perusahaan Daerah Air Minum (PDAM) Tirta Dhaha Kota Kediri. Tujuan penelitian ini adalah untuk menganalisis rasio lancar (current ratio), rasio utang terhadap total aset (debt to total asset ratio), perputaran total aset (total asset turnover), dan margin laba bersih (net profit margin) dalam memprediksi pertumbuhan laba Perusahaan Daerah Air Minum (PDAM) Tirta Dhaha Kota Kediri pada tahun 2019-2021. Metode pengumpulan data yang digunakan adalah dokumentasi dan wawancara.

Hasil penelitian pada tahun 2019-2021 menunjukkan bahwa pertumbuhan laba pada Perusahaan Daerah Air Minum (PDAM) Tirta Dhaha Kota mengalami peningkatan dan penurunan. Masing-masing rasio yang digunakan yaitu rasio likuiditas yang dihitung dengan rasio lancar (current ratio) dan rasio solvabilitas yang dihitung dengan rasio utang terhadap total aset (debt to total asset ratio) mengalami peningkatan dan penurunan. Sedangkan, rasio aktivitas yang dihitung dengan perputaran total aset (total asset turnover), dan rasio profitabilitas yang dihitung dengan marjin laba bersih (net profit margin) mengalami peningkatan pada tahun 2019-2021.

Kata kunci: Rasio Keuangan dan Pertumbuhan Laba
Metafora Tribhuwana Tunggadewi Jayawisnuwardhani Dalam Diri CEO Wanita
Authors: Purnomo Wiga , Soewarno Noorlailie
Published: March 2023

This research metaphorizes the leadership style and characteristics of Tribhuwana Tunggadewi Jayawisnuwardhani that should exist in women when they become CEO. The analysis method is literature studies for obtaining data about Tribhuwana Tunggadewi Jayawisnuwardhani and female CEOs from various sources such as books, websites, journals. The results show that Tribhuwana Tunggadewi Jayawisnuwardhani has transformational leadership style that is very suitable when applied by women when leading. The leadership style combines feminism and masculine. On the feminism side, namely providing support for subordinates to optimize their potential, while on the masculine side, female CEOs can act decisively and wisely.
Urgensi pelaksanaan pendidikan karakter yang terintegrasi: analisis kebijakan penguatan pendidikan karakter
Authors: Fikri Sahlan Hafidzudin , Panji Wahyu Raman Warnerin Rangga , Fitriyah Eka Laila
Published: March 2023

Pendidikan karakter menjadi perhatian serius bagi pemerintah Indonesia. hal tersebut tampak pada usaha pemerintah untuk menaungi pelaksanaan Pendidikan karakter dengan peraturan perpres no 87 tahun 2017 tentang penguatan Pendidikan karakter. Penelitian ini bertujuan untuk menganalisis kebijakan Pendidikan tentang penguatan pendidikan karakter. Metode penelitian yang digunakan dalam penelitian ini penelitian kebijakan dengan pendekatan kajian pustaka. Peraturan presiden no 87 tahun 2017 menjadi sumber primer dalam penelitian ini, sedangkan sumber sekunder berasal dari buku dan jurnal ilmiah.  Hasil penelitian menunjukkan bahwa 1) Penguatan pendidikan karakter dilaksanakan di lingkungan keluarga, sekolah dan masyarakat, 2) kebijakan penguatan pendidikan karakter cenderung hanya mengatur pelaksanaan Pendidikan karakter di Pendidikan formal, 3) penguatan Pendidikan karakter yang terintegrasi antara pendidikan di lingkungan keluarga, sekolah dan masyarakat.
Desempleo, subempleo y resiliencia en la población de dominicanos inmigrantes en los en los Estados Unidos
Authors: Ortega Pedro Jose , Hernandez Ramona
Published: March 2023

Este artículo aborda por primera vez el desempleo y el subempleo en personas de origen dominicano que residen en los Estados Unidos (EE. UU.), a partir de una encuesta realizada en la ciudad de Nueva York. El análisis tiene tres objetivos específicos: 1) describir las características sociodemográficas de una muestra de personas de origen dominicano que viven en condición de desempleo (Grupo A) o de subempleo (Grupo B); 2) explorar los factores que describen la actitud de esta población problemas y adversidades de la vida, y 3) determinar su grado de estrés y ansiedad. El estudio se basó en la técnica de muestreo crítico, no aleatorio probabilístico. Se entrevistaron 128 personas de origen dominicano que se autocalificaron como desempleadas y 168 como subempleadas. La técnica de análisis factorial permitió descubrir tres factores o constructos subyacentes a la actitud. Estos son: “resiliencia”, “adaptación” y “rigidez”. El test de Kessler y Mroczek (K-10) permitió encontrar un moderado nivel de estrés y depresión, entendido como Malestar Psicológico No Específico (MPNE). Este estudio detecta el precario nivel de calidad de vida de esta población, su elevado nivel de actitud positiva y sus bajos o moderados niveles de estrés y de ansiedad.
Martinhal
Authors: Bernardes João Pedro
Published: March 2023

Ficha del yacimiento Martinhal ubicado a Vila do Bispo (Algarve) incluida en el proyecto "Figlinae Hispanae (FIGHISP). Catálogo en red de las alfarerías hispanorromanas y estudio de la comercialización de sus productos".
Los Tejares
Authors: Mosquera Castro Tania , Bartolomé Abraira Roberto , César Vila Mario , Martín Hernández Esperanza , Alonso Toucido Francisco
Published: March 2023

Ficha del yacimiento Los Tejares ubicado a Milles de la Polvorosa (Zamora) incluida en el proyecto "Figlinae Hispanae (FIGHISP). Catálogo en red de las alfarerías hispanorromanas y estudio de la comercialización de sus productos".
Metodologia da pesquisa científica: dos conceitos teóricos à construção do projeto de pesquisa
Authors: Tako Karine Vaccaro , Kameo Simone Yuriko
Published: March 2023

Livro que contém informações sobre a metodologia da Pesquisa Científica, descrevendo tipos de pesquisas científicas, saúde baseada em evidências, sistema GRADE e fontes de pesquisas, partes da metodologia do projeto de pesquisa, além da delimitação do tema, justificativa, problema de pesquisa, hipótese, elaboração de objetivos, ABNT e Vancouver. Introduzindo desde os conceitos teóricos até a construção do projeto de pesquisa.
PENERAPAN MODEL PEMBELAJARAN ROLE PLAYING UNTUK MENINGKATKAN HASIL BELAJAR KISAH KETELADANAN NABI
Authors: BAROKATI BAROKATI
Published: March 2023

When we were little, we liked to play roles with friends. Some become doctors, become patients, become mothers or fathers, some become farmers, some become soldiers, police and various kinds of professions that we like. It turns out that what we play when we are young when used in learning is very fun, exciting and useful. In Islamic Religious Education (PAI) learning, especially historical material about the exemplary stories of the Prophets and Apostles, the teacher usually uses less varied methods and positions himself as an all-knowing person. So that shellfish students are involved in exploiting their potential. The research design used is PTK (classroom action research) which is useful for correcting problems found in the learning process. Based on the results of the research that the application of the learning model can improve the learning outcomes of PAI (The Story of the Prophet's Example) of class V SD Negeri 04 Kendalsari, from an average basic score of 66.84% and classical completeness of 39.50% (incomplete). After the action was taken, in cycle I it increased by 23.60% with an average of 82.63% and classical completeness of 81.60% (complete). And in cycle II the increase was 32.70% with an average of 88.68% and 92.10% (complete) classical completeness
ABSTRAKKetika masih kecil, kita suka bermain peran bersama teman. Ada yang jadi dokter, jadi pasien,jadi ibu atau ayah, ada yang jadi petani, ada yang jadi tentara, polisi dan berbagai macam profesi yang kita sukai. Ternyata apa yang kita maainkan ketik masih kecil jika digunakan dalam pembelajaran sangatlah menyenangkan, mengasyikkan sekaligus bermanfaat. Dalam pembelajaran Pendidikan Agama Islam(PAI) khususnya materi tarikh/sejarah tentang kisah keteladanan Nabi dan Rasul, biasanya guru menggunakan método kurang variatif, dan memposisikan dirinya sebagai sosok yang serba tahu. Sehingga siswa kerang dilibatkan dalam pemanfaatan potensi yang mereka miliki. Desain peneletian yang digunakan ini adalah PTK (penelitian tindakan kelas) yang berguna untuk memperbaiki masalah-masalah yang ditemukan dalam proses pemebelajaran. Berdasarkan hasil penelitian bahwa penerapan model pembelajaran dapat meningkatan hasil belajar PAI(Kisah Keteladanan Nabi) siswa kelas V SD Negeri 04 Kendalsari, dari rata-rata skor dasar 66,84% dan ketuntasan klasikal 39,50% (tidak tuntas). Setelah dilakukan tindakan,maka pada siklus I mengalami peningkatan sebesar 23,60% dengan rata-rata 82,63% dan ketuntasan klasikal 81,60%(tuntas). Dan pada siklus II peningkatan sebesar 32,70% dengan rata-rata 88,68% dan ketuntasan klasikal 92,10%(tuntas).
PENGARUH MODEL PROBLEM BASED LEARNING TERHADAP KEMAMPUAN LITERASI SAINS PESERTA DIDIK KELAS XI MIA SMA ANGKASA MAROS
Authors: YUSUF A.ANNISA TRI UTAMI , HUSAIN HALIMAH , SIDE SUMIATI
Published: March 2023

The purpose of this study was to determine the effect of Problem Based Learning model on scientific literacy ability of Class XI MIA SMA Angkasa Maros Students. The research method used is a quasi-experimental with a quantitative approach with a posttest-only control group design. The data collection technique used multiple choice tests to obtain data on scientific literacy ability. Data analysis was performed using descriptive and inferential statistics. The results of statistical analysis obtained that the experimental class average learning outcomes were 78 higher than the control class, namely 63,51. The results of statistical analysis of scientific literacy ability showed that the experimental and control class data came from a homogeneous population and normally distributed for experimental class but not normally distributed for control class so that the test used was the Mann-Whitney test, thus indicating there is an effect of scientific literacy ability on students after being taught using Problem Based Learning Modelwith a confidence level of 0.05 of 1.64. From these data, it can be seen that zcount (3,26) > ztable. (1.64). based on these data, it can be concluded that there is an effect of Problem Based Learning model on scientific literacy ability of Class XI MIA SMA Angkasa Maros Students (Material for buffer solution).  
ABSTRAKTujuan penelitian ini adalah untuk mengetahui Pengaruh Model Problem Based Learning Terhadap Kemampuan Literasi Sains Belajar Peserta Didik Kelas XI MIA SMA Angkasa Maros. Metode penelitian yang digunakan adalah quasi ekperimen dengan pendekatan kuantitatif dengan desain posttest-only control group design. Teknik pengumpulan data menggunakan tes pilihan ganda untuk memperoleh data hasil tes kemampuan literasi sains. Analisis data dilakukan menggunakan statistik deskriptif dan inferensial. Hasil analisis statistik diperoleh rata-rata  hasil belajar kelas eksperimen 78 lebih tinggi dari kelas kontrol yaitu 63,51. Hasil analisis statistik inferensial terhadap hasil belajar peserta didik menunjukkan bahwa data kelas eskperimen dan kelas kontrol berasal dari populasi yang homogen dan data kelompok eksperimen terdistribusi normal tetapi data kelompok kontrol tidak terdistribusi normal sehingga uji hipotesis yang digunakan adalah uji Mann-Whitney, sehingga menunjukkan bahwa Terdapat pengaruh kemampuan literasi sains pada peserta didik setelah diajar menggunakan model Problem Based Learning dengan taraf kepercayaan 0,05 sebesar 1,64. Dari data tersebut terlihat zhitung (3,26) > ztabel. (1,64). Berdasarkan data tersebut dapat disimpulkan bahwa ada pengaruh model Problem Based Learning Terhadap Kemampuan Literasi Sains Peserta Didik Kelas XI MIA SMA Angkasa Maros (studi pada materi pokok larutan penyangga).
TRANSFORMASI DIGITAL PENGELOLAAN KEGIATAN WARGA DI LINGKUNGAN RT/RW BERBASIS e-DASHBOARD
Authors: Minardi Joko , Abdullah Anggit
Published: March 2023

RT/RW are a community institution that is closest to citizens, and formed through deliberation in the framework of government and community services that are recognized and determined by the Village Government. In the era of information technology, the RT / RW environment is still very little in using information technology to meet the needs of citizens such as RT financial reporting, writing letters, delivering aspirations, and activities agenda in RT neighborhoods. By utilizing information technology in the neighborhood, the communication and activities between the residents and the village apparatus such as the RT head can run effectively. Therefore, a web-based information system is created in the neighborhood of the RT / RW named Smart by using a dashboard panel that can display infographics in RT / RW environments.
Microscopie tomographique diffractive en transmission
Authors: VERRIER Nicolas , DEBAILLEUL Matthieu , SIMON Bertrand , HAEBERLÉ Olivier
Published: March 2023

La microscopie tomographique est une extension de l’holographie numérique, présentant une meilleure résolution. Sans marquage, et donc complémentaire à l’imagerie de fluorescence, elle permet de mesurer quantitativement l’indice optique complexe d’un échantillon. Ce chapitre décrit les configurations courantes, et détaille les principes physiques permettant l’acquisition des données et les approches numériques pour la reconstruction des images.
A climatology of drylines and dryline related convection in sub-tropical southern Africa
Authors: van Schalkwyk Lynette , Blamey Ross C. , Reason Chris J. C. , Dyson Liesl L. , Gijben Morne
Published: March 2023

Surface moisture boundaries or drylines are considered important role players on severe thunderstorm days by South African weather forecasters. On 11 December 2017 one of several thunderstorms which occurred along a dryline, developed into a supercell thunderstorm that resulted in a destructive tornado over the Vaal Marina south of Johannesburg. While the importance of drylines for convection initiation in the region is relatively well understood, the climatological characteristics of drylines and dryline related convection were unknown until recently. Making use of an objective dryline identification algorithm and ERA5 reanalysis data, a climatology of synoptic drylines for the subtropical southern African interior is developed for 1979-2021. The Southern African Plateau (SAP) domain falls within 16-32°S; 18-29°E. Subsequently cloud-to-ground lightning stroke data from the South African Weather Service’s lightning detection network are used to identify days where drylines result in convection between 2010-2021 for a smaller domain within 24-30ºS; 18-24.5ºE. This region is characterized by its high rainfall variability and has some of the highest dryline frequencies in southern Africa. Drylines are found to occur regularly during spring and summer (September - February), almost daily during December, but rarely in winter. Dryline frequencies show large interannual variability with as few as 47 drylines in the summer of 2015/16 of which 38 were convective dryline days, and as many as 73 drylines in the summer of 2016/17 of which 61 were convective. A westward shift in peak dryline frequency takes place through the summer. Drylines peak first over the eastern parts of the SAP during November, but over the central and western SAP during December. Synoptic composite maps are used to gain insight into the different formation environments of drylines that result in convection and those that do not.
Overview of Recent Advancements in Convective Storm Nowcasting in the Czech Hydrometeorological Institute
Authors: Kyznarova Hana , Novak Petr
Published: March 2023

An updated version of JSMeteoView2 web-based application has been developed in the Czech Hydrometeorological Institute (CHMI). It has been used as a primary application for display of weather radar data in CHMI forecasting offices. It is used primarily for displaying of radar data which are available with horizontal and vertical resolution of 0.5 km. It also enables display and combination of other types of data such as data from synoptic stations, data from meteorological satellites, lightning data and requests for intervention of integrated rescue system. Users can use various geographical layers to precisely localize individual meteorological events.

New JSMeteoView2 layer displaying results of object based CELLTRACK algorithm is used specifically in convective situations. CELLTRACK identifies cores of radar reflectivity 44 dBZ and higher and tracks these identified reflectivity cores. It also displays various direct and derived characteristics of the identified cores based primarily on radar data but also on lightning data.

Among other reflectivity core characteristics various hail products were implemented. They are based on Waldvogel algorithm, severe hail algorithm described by Witt and also Vaisala HydroClass algorithm based on dual polarization weather radar data. Long-term evaluation of these hail products was carried out using records from European Severe Weather Database and also on continuous observations from CHMI professional stations, which enabled assessment of probability of detection but also assessment of false alarms occurrence.

The contribution will introduce the updated JSMeteoView2 application with main focus on description of CELLTRACK object layer and overview of implemented hail products. The contribution will also describe methods used for evaluation of hail products and results of this evaluation.
Addressing spatial uncertainty of convection in thunderstorm forecast verification
Authors: Jurkovic Jadran , Soljan Vinko
Published: March 2023

Terminal aerodrome forecast (TAF) is a standard ICAO product used for flight planning purposes worldwide. It is created by forecasters and states forecasted weather conditions significant for aviation and their changes for the airport in the next 24 hours. TAF Verification in Croatia control follows the approach proposed by Mahringer (2008).

Forecasting of convection is challenging and nowadays mostly leans on ingredients-based methodology. Ingredients for deep moist convection are never ideally known–especially mesoscale lift–so uncertainty in local initiation is always present. On the other hand, the standard reference area for thunderstorm (TS) forecast in TAF is a 16 km diameter circle around the airport. The commonly used procedure of verifying TS in TAFs is against observed TS stated in standard reports for the airport (METAR) where a thunderstorm is observed in the same area. But is this enough and fair considering the inherent spatial uncertainty of convection initiation?

For example, the forecaster predicts conditions for TS at the airport for an afternoon with a probability of 40%, and TS was observed 40km away. There is no doubt that it was a  miss event for the (small) airport area but still, TAF had some value. On the other hand, when TS is forecast with high probability and it was not observed within 200km of the airport it is apparently a false alarm. 

To do a fairer TAF verification we used lighting data network (LINET) data and adapted it for several diameters around airports: 16, 30, 50, 100, 150, and 200 km. Hourly series with observed thunderstorms were derived from raw data and verified with forecasted ones from TAFs. We also tried to investigate differences in using this TAF verification method on the homogeneous mainland of Croatia, at the coast, or on complex topography near mountains.

Our results reflect the inherent spatial uncertainty of convection and could be used in analyzing and diagnosing where more improvements could be made in local thunderstorm forecasting.
Analysis of splitting supercell storm based on the Doppler weather radar data 
Authors: Barakova Denitsa , Dimitrova Tsvetelina , Georgiev Stefan , Kadiyska Nadezhda
Published: March 2023

Bulgaria is a country with a high frequency of thunderstorms during the warm season. Extreme convection, leading to torrential rain and large hail, and more specifically a supercell development was discussed in this case study. Radar data from S-band Doppler radars were used for the analysis. The full volume scan had a maximum range of 300 km and was completed in 4 minutes. All radar products shown throughout the study were generated by the Interactive Radar Information System (IRIS) Analysis of Vaisala.

On the 29-th of May 2022 over the territory of Bulgaria there was a 500-hpa trough with the center of the upper level low over the Scandinavian Peninsula. On the surface pressure chart there was a sequence of cold fronts. The upper level flow and the one near the ground had opposite directions – northern and predominantly southern respectively. This leads to strengthening of the vertical wind shear. This synoptic setup was favorable for severe convection development. Data for temperature stratification of the atmosphere, instability indices, wind hodograph, etc. were additionally used.

In the afternoon an isolated convective cell was registered in Southern Bulgaria, which had maximum radar reflectivity Zmax=23 dBZ at height of 6.8 km (-23°C) at 15:47 EET. The cell grew rapidly and after 20 minutes Zmax was 60 dBZ and the storm acquired characteristics of a supercell. A mesocyclonic vortex was visible on the Doppler radar. The cell acquired a V-shaped structure, and later on it split into two cells, both of which retained high radar reflectivity. The cells passed over the Stara planina mountain and the left-moving cell kept high values of radar characteristics for a long time. The right-moving cell also maintained high values of radar reflectivity, but had shorter life time and its intensity was lower.  Both cells produced multiple convective hazards along their paths. The hazards associated with the left-moving cell were severe hail (hailstone sizes greater than 2 cm in diameter), strong wind gusts, heavy rain and intense lighting activity.

Based on the radar data the presence of the typical supercellular radar signatures, such as weak echo region (WER), bounded weak echo region (BWER), hook echo, V-notch and TBSS are presented. The storm severity and the presence of large hail stones were confirmed by maximum radar reflectivity, VIL (Vertical integrated liquid) and VILD (VIL density).
How Mountains Alter Quasi-linear Convective System Dynamics and Tornado Potential
Authors: Lombardo Kelly , Wu Fan , Fenrich Adisen
Published: March 2023

Though tornadoes commonly form in quasi-linear convective systems (QLCSs), predicting their development remains a challenge, due to their rapid formation, relatively short lifetimes as compared to supercell tornadoes, and the likelihood of formation along any segment of the line. Rapid changes in near-surface vertical vorticity associated with QLCS tornadogenesis can result from environmental heterogeneities, including those associated with mountainous landscapes. Mountains can induce variations in stability and vertical wind shear, for example, due to changes in elevation and the configuration of the valleys. Such heterogeneities can influence the evolution of QLCS structures, and thus vertical vorticity. Sloping mountain surfaces can also induce variations in cold pool characteristics and advancement which may further alter storm structural evolutions. Potential systematic linkages between QLCS vertical vorticity and mountains may offer hope toward improved QLCS tornado prediction.

This study leverages idealized numerical simulations to quantify the potential role of mountainous landscapes in the development and evolution of QLCS vertical vorticity. Two different base-state environments are tested, including a profile observed during a QLCS-tornadic event and an analytic profile with several different vertical wind shear configurations. For each base-state environment, we evaluate the sensitivity of QLCS vertical vorticity evolution to a suite of simplified mountain configurations, including a plateau with either a downward or upward sloping surface, each with or without a localized valley of different widths within the sloping surface. Preliminary results indicate that as QLCSs move over a mountain slope with a valley, line echo wave patterns form, which have been associated with QLCS tornado damage. Thus, terrain may be important for the development of QLCS tornadoes through the modification of the linear structure by the underlying irregular surface landscape. Localized valleys also favor CI and the development of intense convective cells, which may increase tornado potential within and near the valley.
Hodographs and Skew-Ts of Hail-Producing Supercells
Authors: Nixon Cameron , Allen John
Published: March 2023

Most forecasters can recognize a “textbook” tornado environment. But what does a classic hail environment look like? The latest literature finds moderate buoyancy, weak low-level shear, and straight hodographs to be most favorable for severe hail. However, not all large hail events occur in this sort of environment. This study seeks to answer three main questions. First, is there an optimal "balance" of buoyancy and shear conducive for large hail? Second, is strong low-level shear really detrimental to hail, or only in some environments? Lastly, does buoyancy really matter, or more simply the depth of the storm above the freezing level? This study seeks to establish a basic conceptual model for large hail forecasting. 

To understand the variety of conditions that lead to large hail, we use a self-organizing map (SOM) algorithm trained on ERA-5 reanalysis data to examine the most common clusters of hail environments given over 48,000 reports. An SOM can reveal patterns in the shapes of hodographs or skew-Ts that can guide further investigations. We find that large hail may depend on a delicate balance between CAPE, shear, and relative humidity, and can occur in a wide variety of shear environments (even when low-level shear is strong). We find that low-level shear can thwart the production of large hail, but that this effect can be suppressed by low-level stability. Lastly, we find that maximum hail size may depend simply on storm depth, rather than buoyancy. With the help of the comprehensive conceptual models explored here, we hope that forecasters can more readily recognize the next “textbook” hail environment.
Tornado in Czech Republic – An ICON-RUC case study
Authors: Ulbrich Sven , Zschenderlein Philipp , Rempel Martin , de Lozar Alberto , Pucik Tomas , Blahak Ulrich
Published: March 2023

The German Meteorological Service (DWD) aims to enhance its ability to provide warnings on shorter notice (e.g. of extreme convective events) and therefore implements a rapid update cycle (RUC). This system produces more frequent and faster available numerical ensemble forecasts compared to the standard ICON-D2 short range numerical weather prediction (SRNWP) forecast procedure. The RUC’s focus is on lead times of up to 12 hours.

The RUC’s capability in predicting extreme convective events is tested by applying its setup to re-forecast the violent tornado case near Hodonin in the Czech Republic in June 2021. As this area is outside of the ICON-D2 domain, the model domain was shifted. While several German radar stations could not contribute to the new domain, 3D radar reflectivities and radial winds from several Czech and Slovakian radars were used for this case study. The assimilation cycle is started from the ICON-EU state the day before the event and hourly ensemble forecasts are started before the actual event. In addition, we included a nested domain, which uses a resolution of ~1km to evaluate the impact on the atmospheric parameters and dynamics.

We present results of the simulation of the atmospheric condition as well as tracks and dynamics of the developing convective systems with respect to different lead times and horizontal resolutions. As expected, there is an increase in forecast accuracy of the convective event with decreasing lead time. With respect to the different horizontal resolution, amplitudes of wind speed and updraft helicity are larger for the 1-km domain. Further, the rotation signature of the simulated tornadic supercell (e.g. radial wind) is comparable to the actually observed one.
Supercell low-level mesocyclones: Origins of inflow and vorticity
Authors: Coffer Brice , Parker Matthew , Peters John , Wade Andrew
Published: March 2023

In this presentation, we will recap the historical use of storm-relative helicity in supercell environments, share updated climatioglical distributions from both the United States and Europe, and use simulations of supercells (described below) to explain why near-ground streamwise horizontal vorticity within the environment is such a powerful tool for forecasting supercell tornadogenesis across multiple continents.

Low-level mesocyclones in supercell thunderstorms has historically been associated with the development of storm-generated streamwise vorticity along a baroclinic gradient in the forward flank of supercells. However, the ambient streamwise vorticity of the environment (often quantified via storm-relative helicity), especially near the ground, is particularly skillful at discriminating between nontornadic and tornadic supercells. This study investigates whether the origins of the inflow air into supercell low-level mesocyclones, both horizontally and vertically, can help explain the dynamical role of environmental versus storm-generated vorticity in low-level mesocyclone intensification. Simulations of supercells, initialized with wind profiles common to supercell environments observed in nature, show that the air bound for the low-level mesocyclone primarily originates from the undisturbed, ambient environment, rather than from along the forward flank, and from very close to the ground, often in the lowest 200 - 400 m of the atmosphere. Given that the near-ground environmental air comprises the bulk of the inflow into low-level mesocyclones, this likely explains the forecast skill of environmental streamwise vorticity in the lowest few hundred meters of the atmosphere. Contrary to prior conceptual models of low-level mesocyclones, intensification does not appear to require the development of additional horizontal vorticity in the forward flank. Instead, the dominant contributor to vertical vorticity within the low-level mesocyclone is from the environmental horizontal vorticity. This study therefore supports a revised view of low-level mesocyclones in supercells.
SIFT - An interactive tool for satellite data visualisation and analysis
Authors: Meraner Andrea , Strandgren Johan , Joro Sauli
Published: March 2023

Meteorological satellites continuously provide a wealth of data while observing the weather from space. With the next generation satellites and space-borne imagers, the spatial resolution, temporal resolution and spatial/spectral coverage is increasing, further increasing the amount of data. While this is certainly useful for severe weather monitoring and forecasting, it also puts high demands on the tools used to read, process, visualise and analyse the data. The heterogeneous nature of both the satellite data as well as possible reference data from e.g. ground-based networks requires further flexibility and modularity for effective data handling. Similarly, it is usually not feasible for a single user or user group to be familiar with all the different satellite data formats including how to open the files and how to extract and visualize the relevant data.

The Satellite Information Familiarization Tool – SIFT – is a free and open source interactive tool initially developed at SSEC University of Wisconsin for the visualisation and analysis of satellite imagery data. In preparation for Meteosat Third Generation (MTG) and the launch of the Flexible Combined Imager (FCI) and Lightning Imager (LI) in 2022, EUMETSAT has further developed SIFT, with the main objective of having an easy to use and responsive software compatible with data from different instruments that can be used for different tasks including e.g. data visualization and analysis, Cal/Val activities and training. SIFT also utilises several of the Pytroll open source libraries (e.g. Satpy) to read and process the data, thus enabling access to the visualization and analysis of a multitude of different data sources.

The new version of SIFT, including the latest developments led by EUMETSAT, is expected to be released to users in 2023 and with this presentation we want to show potential users how this tool can be used to visualize satellite data for severe storm analysis including a live demonstration.
Tailoring SINFONY forecasts and other DWD products to flood forecasting applications following a co-design approach
Authors: Keller Julia H. , Berndt Christian , Blahak Ulrich , Bondy Jan , Fundel Vanessa , Schmidt Malte
Published: March 2023

To improve the prediction of small-scale flooding events with high societal impacts that may result from heavy precipitation associated with severe convective storms, Deutscher Wetterdienst (DWD) is strengthening its collaboration with Germany´s flood forecasting authorities.

With its focus on the seamless and probabilistic prediction of severe summertime convective events and associated heavy precipitation, DWD´s novel Seamless Integrated Forecasting System (SINFONY) is considered as a major step towards improving precipitation information for the forecast range from minutes to approx. 12 hours. To ensure a significant contribution of our newly developed SINFONY data and products for hydrological applications, in particular the prediction of flash floods, the SINFONY team is in a continuous dialogue with users from flood forecasting centres. One of the main objectives thereby is to identify user requirements and to utilize this information for targeted development of forecast products. In addition, users are supported in implementing those data and products in their models and decision processes.

Starting from this year, the above-mentioned activities within SINFONY will be complemented by a research project for augmenting the hydrometeorological value chain through co-design. This project is jointly developed and conducted by DWD and operational German flood forecasting centres, and funded in the context of DWD´s new research Programme “Italia – Deutschland science-4-services network in weather and climate”. The activities within the project stretch across the value chain for the generation of hydrometeorological forecasts. They aim for i.) a user-oriented evaluation and optimization of DWD´s precipitation forecasts (SINFONY, ICON-D2-EPS,…); ii.) the implementation of functionalities and processes optimised to the needs of flood forecasting centres into the DWD´s new warning system; iii.) the evaluation of DWD (new) data and products within operational flood forecasting applications; vi.) the harmonisation of precipitation and flood warnings; v.) the improvement of the communication and perception of forecasts and warnings.

With this poster presentation we will provide an overview of the ongoing and commencing activities described above. We are also interested in an exchange with participants of ECSS 2023, working on the intersection between meteorology and hydrology, to learn about their experiences.
EUMETSAT-ESSL Testbeds and Workshops for Meteosat Third Generation User Preparation
Authors: Holzer Alois M. , Groenemeijer Pieter , Púčik Tomáš , Bojinski Stephan , Strelec-Mahović Nataša
Published: March 2023

To prepare users for the Meteosat Third Generation of satellites, the first of which was launched in December 2022, ESSL conducts testbeds and expert workshops in cooperation with EUMETSAT at the ESSL Research and Training Centre in Wiener Neustadt, Austria. The goal of the testbeds is to expose forecasters to the capabilities of new MTG sensors, the Flexible Combined Imager (FCI), the Lightning Imager (LI), and the Infrared Sounder (IRS) and to collect their feedback on the visualizations of the data. 

In each of the testbeds, three of which were held in 2022, 15 people from different EUMETSAT member states take part in a week-long activity with working conditions close to the usual working environment of a forecaster, i.e., with having a wide range of data available, including many data not from satellites, together with predefined output formats and time pressure. The task of the participating meteorologists is to produce nowcasts and probabilistic forecasts for predefined types of severe weather. The forecast region depends on the weather situation of a particular day and can shift from one part of Europe to another from day to day, depending on the active weather patterns.

In 2022, before any MTG data was available, a range of products that functioned as a proxy for MTG data was used. This included data from imagers on polar-orbiting satellites mimicking the capabilities of future FCI products. These data were visualized in the ESSL Displayer, ESSL’s html interface for visualizing meteorological data. Based on the participants’ work and expert consultation on several RGBs, a novel “Low Moisture” product, and a range of products from the Nowcasting Satellite Applications Facility (NWC-SAF), direct and written feedback was collected and provided to the developers. In 2023, the focus will move away from proxy data to data collected by real MTG sensors. Actual FCI and, later, LI products will be included in the Testbed Displayer. For the hyperspectral IRS, a sensor mounted on the second MTG satellite to be launched in 2024, proxy data will be visualized.
Using land surface information to improve nowcasts of mesoscale convective systems in West Africa
Authors: Klein Cornelia , Anderson Seonaid , Taylor Christopher , Cole Steven , Abdoulahat Diop
Published: March 2023

Mesoscale convective systems (MCSs) dominate rainfall and its extremes in most parts of West Africa, frequently producing flash floods that results in major damage and loss of life. As West African storms are already intensifying, these effects are expected to become more frequent and severe under climate-change and rapid urban expansion. To help mitigate these impacts, we co-developed a prototype nowcasting system with West African meteorological services based on conditioned climatologies of MCSs as seen from the Meteosat Second Generation satellites since 2004. The system is now being trialled for improving storm nowcasts for up to 6 hours ahead and for the first time incorporates near real-time remotely-sensed land surface information (land surface temperature, soil moisture) to increase storm predictability due to surface effects on convective instability, moisture convergence and regions of high wind shear. We will present the workflow of this nowcasting system and will discuss our current understanding of the land surface effects that play a role for storm development and prediction in the region. Crucially, the developed nowcasting system is computationally inexpensive to run operationally once set up, can be combined with existing forecast workflows, and achieves skill in the absence of rainfall radar, which is not available over most of Africa. Lessons learnt on co-developing nowcasting tools and further development steps will be discussed.
A-5-year climatology of squall from Moldova meteorological stations
Authors: Pruteanu Daniela , Tiron Gina , Pasat Carleta-Elena , Oprea Carolina-Irina
Published: March 2023

Thunderstorms bring severe weather conditions such as damaging winds, a large hail and heavy precipitation. The squall phenomenon reported at the meteorological station is characterized by a strong variation of wind: its speed increases suddenly for a short period of time, sometimes of the order of minutes, just as quickly accompanied by a change of direction, in most cases.  The squall precedes or accompanies Cumulonimbus clouds and it is part of the entire range of sudden variations of meteorological elements that can be observed during the passage of a strong thunderstorm. At synoptic and mesoscale this strong thunderstorm are parts of squall lines. Squall line is a quasi-linear convective system that often occur along a cold front or in the warm sector of a midlatitude cyclone, usually about a few kilometers in advance of the cold front.

This study focuses on a 5-year period between 2018 and 2022 to quantify the spatial and temporal characteristics of squalls, as well as the type of thunderstorm associated with them. We used a set of 100 meteorological observations recorded at the following stations: Galati, Focşani, Tecuci, Barlad, Vaslui, Negresti, Iasi, Cotnari, Botosani, Darabani, Suceava, Piatra Neamt, Bacau and Targu Ocna. These meteorological stations are part of Moldova meteorological network. Radar data from the Barnova meteorological radar were used for the purpose of identifying different types of convective organization, in special squall lines and bow echoes. 

 

Keywords: thunderstorm, squall
The climatology of supercell thunderstorms across Poland based on multisource data
Authors: Piasecki Krzysztof , Taszarek Mateusz , Surowiecki Artur , Pilguj Natalia
Published: March 2023

Each year supercell storms in Europe are responsible for significant property damage and cause injury and death to people. Storms that have a deep persistent rotating updraft are capable of generating particularly violent phenomena - flash floods, large hail and strong wind gusts of convective origin. Supercells are also responsible for producing the strongest tornadoes with intensity of even F4-F5 in Fujita scale as evidenced over the recent decades across Europe, including Poland. Despite significant hazards posed by these types of storms, no research on climatological aspects of supercell thunderstorms in Poland has been carried out so far.

The goal of this work was to study spatial and temporal characteristics of supercell thunderstorms in Poland between 2008 and 2022. In order to accomplish this task, a vector-tabular database of supercell thunderstorms over Poland was created, based on a manual analysis of 10-minute interval radar data accompanied by severe weather reports from the European Severe Weather Database (ESWD). The typical radar-derived signatures of supercells (e.g. bounded weak echo region, velocity couplet, hook echo) and/or long, continuous paths of high radar reflectivity with deviant motion were one of the main identification criterias. Identified supercells were classified into 3 groups, based on the confidence of their detection from plausible events to those producing significant severe weather. Manual evaluation of 15 years of radar and ESWD data allowed to analyze in the climatological context supercells track widths and lengths, storm duration, spatiotemporal frequency, accompanying hazards and characteristics such as right- or left-moving movement propagation. Moreover, ERA5 reanalysis was used to study accompanying atmospheric environments of identified supercells. An addition of lightning data from the PERUN network enabled also to evaluate non-supercell storm environments to show differences with supercells.