Resultados de búsqueda - "Shandong"
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Causes of the Outer Spiral Rainbands in Typhoon Yagi （ 2018） in Shandong Province of China
Publicado 2025-06-01“…On August 14， 2018， Typhoon Yagi （2018） moved northward and impacted Shandong Province of China， resulting in widespread rainstorm and heavy rainstorm.The total rainfall caused by the typhoon in Shandong presents a round-shaped distribution.Specifically， on August 14， an outer spiral rainband appeared on the typhoon periphery in southeastern Shandong， bringing short-term heavy rainfall and local heavy rainstorms.Due to the relatively small scale of this rainband， both numerical forecasting models and forecasters face challenges in predicting its rainfall accurately.To study the mechanisms of the outer spiral rainbands of Typhoon Yagi， the characteristics and causes of the spiral rainbands are investigated in this study by using radar data and the observations from ground-based stations， radiosonde stations and aircraft.Numerical experiments are also conducted based on the Advanced Research WRF （Weather Research and Forecasting） model and its Hybrid-3DVAR （three-dimensional variational） data assimilation system.The model adopts 12 km and 4 km one-way nested grids， with 44 vertical layers.The initial ensemble perturbation fields are generated by using a stochastic perturbation method， and the Ensemble Transform Kalman Filter （ETKF） method is used for the bias correction of ensemble forecast， providing flow dependent background errors for the Hybrid-3DVAR assimilation module.Comparative experiments with and without the Aircraft Meteorological Data Relay （AMDAR） data assimilation are conducted by adopting 100% flow-dependent error covariance and by using a 45-minute assimilation time window.The results indicate that the outer spiral rainbands are formed by the merging and development of several linear mesoscale convective systems （MCSs）.The outer spiral rainbands exhibit distinct characteristics of the linear MCSs with leading stratiform precipitation， i.e.， the linear MCSs consist of several convective cells with back-building convection.There are several stronger linear MCSs merging laterally into other linear MCSs.Broad stratiform echoes appear in the front （eastern part） of the linear MCS in its maturity stage， and the convection develops up to 10 km or more.There is a weak-echo transition zone between the strong convective line and the sub-strong stratiform echo region.Short-term heavy rainfall occurs along the linear MCS at the maturity stage.The water vapor of heavy rainfall mainly comes from the near-surface layer （below 850 hPa） around the typhoon， and the water vapor flux convergence is mainly concentrated near the wind field convergence line.Before convection initiation， the middle and lower levels over Shandong are thermally unstable with high temperature and high humidity， and the wind rotates clockwise with height， which favor the development of convective systems.As the typhoon slowly moves northward， downward intrusion of cold air appears at 500 hPa.Below 900 hPa， on the southeast of the typhoon over central Shandong there are local convergence between southwesterly wind and southerly wind， and between southerly wind and southeasterly wind.The convergence-induced dynamic uplift triggers the release of unstable energy， stimulating several local linear MCSs.The MCSs develop northward along the steering flow.The linear MCSs merge and strengthen for several times， and finally the elongated spiral rainbands occur.During the convection lifetime， the updrafts are noticeably stronger than the downdrafts.At the mature stage of the convective systems， dry and cold downdrafts appear in the lower levels in the front of the MCS.Convective systems at the heights above 600 hPa move rapidly eastward with the upper-air steering flow， leading to the gradual weakening and dissipation of the linear MCS.Assimilation of AMDAR can improve the typhoon track and wind field forecasts of the WRF model， as well as the dynamical triggering mechanism of convective systems.Thus， the occurrence of spiral rainbands in the typhoon periphery could be accurately forecasted.Furthermore， central Shandong is a mountainous region， so how does the topography influence the triggering and developing of convective systems？ …”On August 14， 2018， Typhoon Yagi （2018） moved northward and impacted Shandong Province of China， resulting in widespread rainstorm and heavy rainstorm.The total rainfall caused by the typhoon in Shandong presents a round-shaped distribution.Specifically， on August 14， an outer spiral rainband appear...
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Tectonic Controls on Late Paleozoic Shale Gas Preservation in Western Shandong, China
Publicado 2025-06-01Materias: Enlace del recursoBased on structural geology, petrology, shale gas geology, and basin modeling, this study investigates the characteristics of tectonic evolution and sedimentary responses in Western Shandong since the Late Paleozoic. Additionally, this study systematically investigates the hydrocarbon generation and...
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Viral etiology of severe acute respiratory infections in hospitalized patients, Shandong, China
Publicado 2025-01-01 Enlace del recurso
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Viral etiology of severe acute respiratory infections in hospitalized patients, Shandong, China.
Publicado 2025-01-01“…This study systematically characterizes the epidemiological and clinical phenotypes of SARI patients in Shouguang county, Shandong Province, China.<h4>Methods</h4>A prospective observational study was conducted at Shouguang People's Hospital between August 28, 2023 and April 30, 2024, enrolling 1,730 hospitalized patients with SARI from the Departments of Infectious Diseases and Respiratory and Critical Care Medicine. …”<h4>Background</h4>Severe Acute Respiratory Infection (SARI) represents a critical global public health challenge, accounting for substantial severe morbidity and hospitalization burdens with distinct geographical patterns in etiological profiles. This study systematically characterizes...
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Yeast Diversity in Spontaneous Fermentation of Four Wine Grape Cultivars from Penglai, Shandong
Publicado 2025-06-01Materias: “…wine procuring region of penglai, shandong; wine; spontaneous fermentation; yeast diversity; saccharomyces cerevisiae; non-saccharomyces…”To investigate indigenous yeast resources and diversity in the wine producing region of Penglai, Shandong, WLN medium combined with sequencing of the D1/D2 region of the 26S rDNA was employed to isolate and identify yeasts during spontaneous fermentation of four wine grape cultivars (Chardonnay, Pet...
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First report of cereal cyst nematode (Heterodera filipjevi) on winter wheat in Shandong Province, China
Publicado 2018-08-01 Enlace del recurso
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Hydrochemical Characteristics and Genesis Analysis of Closed Coal Mining Areas in Southwestern Shandong Province, China
Publicado 2025-07-01“…This study comprehensively applied methods such as Piper’s trilinear diagram, linear fitting, and correlation analysis to quantitatively analyze the hydrochemical characteristics of closed coal mining areas in southwest Shandong and to clarify the sources of geochemical components in surface water and groundwater, and the PMF model was used to analyze the sources of chemical components in mine water and karst water. …”With the large-scale closure of coal mines leading to groundwater pollution, in order to systematically identify the sources of major chemical ions in surface water and groundwater. This study comprehensively applied methods such as Piper’s trilinear diagram, linear fitting, and correlation analysis...
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Comparative Analysis of Hydrodynamic Characteristics off Shandong Under the Influence of Two Types of Storm Surges
Publicado 2025-05-01Materias: Enlace del recursoAs China’s largest peninsula, the Shandong Peninsula faces recurrent threats from both tropical and extratropical cyclone-induced storm surges. Understanding the distinct mechanisms governing these surge types is critical for developing targeted coastal hazard mitigation strategies. This investigati...
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Ambient Noise Tomography of the Shandong Province and its Implication for Cenozoic Intraplate Volcanism in Eastern China
Publicado 2018-09-01“…Abstract New images of shear wave velocity (VS) structure of the crust and uppermost mantle in the Shandong province of China are presented based on inversion of ambient seismic noise data from 47 broadband stations. …”Abstract New images of shear wave velocity (VS) structure of the crust and uppermost mantle in the Shandong province of China are presented based on inversion of ambient seismic noise data from 47 broadband stations. Interstation Rayleigh wave phase‐velocity dispersion curves for periods of 1–40 s a...
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Zonal Estimation of the Earliest Winter Wheat Identification Time in Shandong Province Considering Phenological and Environmental Factors
Publicado 2025-06-01“…Results indicated that Shandong Province was divided into four zones (A–D), with Zone D (southwestern Shandong) achieving the earliest mapping by early December with an overall accuracy (OA) of 97.0%. …”Early-season crop mapping plays a critical role in yield estimation, agricultural management, and policy-making. However, most existing methods assign a uniform earliest identification time across provincial or broader extents, overlooking spatial heterogeneity in crop phenology and environmental co...
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Population dynamics of Tricentrus sp. and detection of jujube witches'-broom phytoplasma in a Shandong jujube orchard
Publicado 2025-06-01“…[Objective] China's jujube industry has achieved an annual output value exceeding 100 billion RMB, serving as a crucial economic source for approximately 20 million farmers in saline, sandy, and arid regions. Shandong Province, one of China's major jujube-producing areas, features plantations concentrated in the saline-alkali regions of northwest Shandong and the barren mountainous areas of central and southern Shandong. …”[Objective] China's jujube industry has achieved an annual output value exceeding 100 billion RMB, serving as a crucial economic source for approximately 20 million farmers in saline, sandy, and arid regions. Shandong Province, one of China's major jujube-producing areas, features plantati...
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Epidemiological characteristics and spatial clustering analysis of human brucellosis in Zibo City, Shandong Province, China, 2006–2024
Publicado 2025-06-01Enlace del recursoBackgroundThe significant rise in human brucellosis incidence is a serious public health issue in Zibo City. However, its temporal and spatial distribution has not been thoroughly investigated.ObjectiveThis study aims to describe the demographic, temporal, and spatial distribution patterns and clust...
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Rational Analysis of the Utilization of Pentoxifylline in a Tertiary Hospital: Central Hospital Affiliated to Shandong First Medical University
Publicado 2025-07-01“…Yuanyuan Zheng,1,2,&ast; Yanhui Yin,1,&ast; Hong Liu,3 Wenwen Gao,1 Qian Wang1 1Department of Pharmacy, Central Hospital Affiliated to Shandong First Medical University, Jinan, 250013, People’s Republic of China; 2The First Affiliated Hospital of Shandong First Medical University, Jinan, 250014, People’s Republic of China; 3Department of Pharmacy, Laiwu District People’s Hospital, Jinan, 271100, People’s Republic of China&ast;These authors contributed equally to this workCorrespondence: Qian Wang, Department of Pharmacy, Central Hospital Affiliated to Shandong First Medical University, No. 105 Jiefang Road, Lixia District, Jinan City, Shandong Province, 252213, People’s Republic of China, Email 13165131021@163.comObjective: This study aimed to evaluate the rational use, safety, and economic implications of pentoxifylline in a hospital setting and provide recommendations for its appropriate clinical application.Methods: A retrospective analysis was conducted on 322 patients discharged from September to December 2020, who received pentoxifylline. …”Yuanyuan Zheng,1,2,&ast; Yanhui Yin,1,&ast; Hong Liu,3 Wenwen Gao,1 Qian Wang1 1Department of Pharmacy, Central Hospital Affiliated to Shandong First Medical University, Jinan, 250013, People’s Republic of China; 2The First Affiliated Hospital of Shandong First Medical University, Ji...
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Diversity and antibiotic resistance of cultivable bacteria in bulk tank milk from dairy farms in Shandong Province, China
Publicado 2025-07-01“…IntroductionThis study systematically analyzed bacterial diversity and antimicrobial resistance (AMR) profiles in bulk tank milk from five dairy farms (n = 30) in Shandong Province, China, to assess public health risks associated with microbial contamination and provide critical data for regional quality control and AMR risk assessment in dairy production systems.MethodsTotal bacterial counts were quantified, revealing significant inter-farm variation (P < 0.05) with a range of 3.94–6.68 log CFU/mL. …”IntroductionThis study systematically analyzed bacterial diversity and antimicrobial resistance (AMR) profiles in bulk tank milk from five dairy farms (n = 30) in Shandong Province, China, to assess public health risks associated with microbial contamination and provide critical data for regional qu...
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Unraveling hydrogeochemical dynamics and mixing mechanisms in North Shandong coastal aquifers: insights from isotopic and geochemical tracers
Publicado 2025-06-01“…The muddy coastal region of North Shandong, China, including Laizhou Bay and the Huanghe River (Yellow River) Delta, is a complex depositional environment where land and sea intersect, creating diverse water types and intricate coastal groundwater formation and evolution. …”The muddy coastal region of North Shandong, China, including Laizhou Bay and the Huanghe River (Yellow River) Delta, is a complex depositional environment where land and sea intersect, creating diverse water types and intricate coastal groundwater formation and evolution. This study focuses on the s...
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Research on rural domestic sewage treatment in the context of rural resident decline*: A survey in Qufu, Shandong Province
Publicado 2025-09-01“…Methods: Through an in-depth investigation of Qufu, Shandong Province—a national demonstration county for rural domestic sewage treatment—and literature reviews, group discussions, interviews, and questionnaire surveys, the adverse effects of rural population decline on rural domestic sewage treatment are summarized. …”Purpose: This study analyses the impact of large rural population outflows on rural domestic sewage treatment and proposes countermeasures to improve the efficiency of rural domestic sewage treatment against the background of rural resident decline, with the goal of providing decision-making referen...
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Association between hydrometeorological conditions and hemorrhagic fever with renal syndrome in Shandong Province, China, from 2005 to 2019.
Publicado 2025-07-01“…This study aimed to assess the non-linear and lagged effects of extreme hydrometeorological conditions on HFRS risk and examine the modifying effects of regional characteristics in Shandong Province, China.<h4>Methods</h4>Data from January 1, 2005 to December 31, 2019 across 136 counties in Shandong Province were collected. …”<h4>Background</h4>Hemorrhagic fever with renal syndrome (HFRS) is a rodent-borne zoonotic disease with a case fatality rate ranging from 1% to 15%. Long-term evidence regarding its association with local hydrometeorological conditions remain limited. This study aimed to assess the non-l...
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Enteroaggregative Escherichia coli foodborne outbreak in Shandong Province, China (2023): comprehensive epidemiology and genomic resistance profiling
Publicado 2025-06-01“…Despite its clinical significance, the global understanding of EAEC outbreaks and pathogen characteristics remains limited due to its complex epidemiological profile.MethodsThis study presented a retrospective analysis of a foodborne diarrheal outbreak caused by EAEC in a county school in Shandong Province, China in 2023 by using epidemiological investigation and comprehensive genomic analysis techniques.ResultsA total of 15 EAEC isolates were identified, including 13 from stool samples, one from sauced beef, and one from flies. …”IntroductionEnteroaggregative Escherichia coli (EAEC) is an emerging and intricate diarrheagenic bacterial pathogen responsible for acute and persistent diarrhea in children, adults, and travelers. Despite its clinical significance, the global understanding of EAEC outbreaks and pathogen characteris...
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Impact of agricultural intensification on soil organic carbon: A study using DNDC in Huantai County, Shandong Province, China
Publicado 2016-06-01Enlace del recursoUsing the biogeochemical model denitrification/decomposition (DNDC), the dynamic changes of soil organic carbon (SOC) of farmland from the 1980s to 2030s were investigated in Huantai County, a typical intensive agricultural region in the Huang-Huai-Hai Plain of China. Prior to modelling, validation...
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