90,816 results match your criteria weather conditions


[Evaluation of Air Pollution Characteristics and Air Quality Improvement Effect in Beijing and Chengdu].

Huan Jing Ke Xue 2021 Aug;42(8):3622-3632

Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu 610225, China.

In recent years, China's air quality has been improving, and the concentration of atmospheric particulate matter has decreased significantly. In this study, the pollution characteristics and trends of two typical representative cities (Beijing and Chengdu) were analyzed. The geographical locations, pollution emissions, and meteorological diffusion conditions of the two cities were compared, to evaluate the relative contribution of meteorological conditions and pollution reduction regulations in decreasing fine particulate matter (PM) concentrations. Read More

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Common Buzzards wintering strategies as an effect of weather conditions and geographic barriers.

Ecol Evol 2021 Jul 27;11(14):9697-9706. Epub 2021 Jun 27.

Faculty of Geography and Geology "Alexandru Ioan Cuza" University of Iasi Iasi Romania.

Aim: Migration is a constantly changing adaptation due to the climate condition evolution. The struggle for surviving during harsh winter season is different across Europe, being more complex toward the inner parts of the continent. The current approach explores the Common Buzzard number variation during the cold season and the climatic predictors of birds of prey wintering movements in relation to the possible influences of the Carpathian Mountains, which may act as a geographical barrier providing shelter from cold air outbreak from north and northeast of the continent. Read More

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The Physiological Functionality of PGR5/PGRL1-Dependent Cyclic Electron Transport in Sustaining Photosynthesis.

Front Plant Sci 2021 7;12:702196. Epub 2021 Jul 7.

School of Biological Sciences, The University of Western Australia, Perth, WA, Australia.

The cyclic electron transport (CET), after the linear electron transport (LET), is another important electron transport pathway during the light reactions of photosynthesis. The proton gradient regulation 5 (PGR5)/PRG5-like photosynthetic phenotype 1 (PGRL1) and the NADH dehydrogenase-like complex pathways are linked to the CET. Recently, the regulation of CET around photosystem I (PSI) has been recognized as crucial for photosynthesis and plant growth. Read More

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Elite Marathoners Run Faster With Increasing Temperatures in Berlin Marathon.

Front Physiol 2021 7;12:649898. Epub 2021 Jul 7.

School of Health and Caring Sciences, University of West Attica, Athens, Greece.

The influence of environmental conditions has been investigated for different marathon races, but not for the Berlin Marathon, the fastest marathon race course in the world. The aim of this study was to investigate the potential influence of environmental conditions such as temperature, precipitation, sunshine, and atmospheric pressure on marathon race times in the Berlin Marathon since its first event in 1974-2019. A total of = 882,540 valid finisher records were available for analysis, of which 724,135 correspond to male and 158,405 to female runners. Read More

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Prediction of Pest Insect Appearance Using Sensors and Machine Learning.

Sensors (Basel) 2021 Jul 16;21(14). Epub 2021 Jul 16.

IHP-Leibniz-Institut für Innovative Mikroelektronik, Im Technologiepark 25, 15236 Frankfurt Oder, Germany.

The appearance of pest insects can lead to a loss in yield if farmers do not respond in a timely manner to suppress their spread. Occurrences and numbers of insects can be monitored through insect traps, which include their permanent touring and checking of their condition. Another more efficient way is to set up sensor devices with a camera at the traps that will photograph the traps and forward the images to the Internet, where the pest insect's appearance will be predicted by image analysis. Read More

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GPS-Free, Error Tolerant Path Planning for Swarms of Micro Aerial Vehicles with Quality Amplification .

Sensors (Basel) 2021 Jul 10;21(14). Epub 2021 Jul 10.

Institute of Computing, University of Campinas, 13083-852 Campinas, Brazil.

We present an error tolerant path planning algorithm for Micro Aerial Vehicle (MAV) swarms. We assume navigation without GPS-like techniques. The MAVs find their path using sensors and cameras, identifying and following a series of visual landmarks. Read More

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Qualitative Study on the Observations of Emissions, Transport, and the Influence of Climatic Factors from Sugarcane Burning: A South African Perspective.

Int J Environ Res Public Health 2021 Jul 19;18(14). Epub 2021 Jul 19.

School of Geography, Archaeology and Environmental Studies, University of the Witwatersrand, Johannesburg 2050, South Africa.

There are two methods of harvesting sugarcane-manual or mechanical. Manual harvesting requires the burning of the standing sugarcane crop. Burning of the crop results in the emission of aerosols and harmful trace gases into the atmosphere. Read More

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Weather conditions associated with death attributed to bovine respiratory disease complex in high-risk auction market-sourced male beef calves.

Am J Vet Res 2021 Aug;82(8):644-652

Objective: To evaluate associations between weather conditions and management factors with the incidence of death attributable to bovine respiratory disease complex (BRDC) in high-risk auction-sourced beef calves.

Animals: Cohorts (n = 3,339) of male beef calves (545,866) purchased by 1 large cattle feeding operation from 216 locations and transported to 1 of 89 feeding locations (backgrounding location or feedlot) with similar management protocols.

Procedures: Associations between weather conditions and management factors on the day of purchase (day P) and during the first week at the feeding location and cumulative BRDC mortality incidence within the first 60 days on feed were estimated in a mixed-effects negative binomial regression model. Read More

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Heat-Related Emergency Department Visits During the Northwestern Heat Wave - United States, June 2021.

MMWR Morb Mortal Wkly Rep 2021 Jul 23;70(29):1020-1021. Epub 2021 Jul 23.

Record high temperatures are occurring more frequently in the United States, and climate change is causing heat waves to become more intense (1), directly impacting human health, including heat-related illnesses and deaths. On average, approximately 700 heat-related deaths occur in the United States each year (2). In the northwestern United States, increasing temperatures are projected to cause significant adverse health effects in the coming years (3). Read More

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Death Zone Weather Extremes Mountaineers Have Experienced in Successful Ascents.

Front Physiol 2021 5;12:696335. Epub 2021 Jul 5.

Department of Nutritional Biochemistry, Faculty of Health Sciences, Medical University of Gdańsk, Gdańsk, Poland.

Background: Few data are available on mountaineers' survival prospects in extreme weather above 8000 m (the Death Zone). We aimed to assess Death Zone weather extremes experienced in climbing-season ascents of Everest and K2, all winter ascents of 8000 m peaks (8K) in the Himalayas and Karakoram, environmental records of human survival, and weather extremes experienced with and without oxygen support.

Materials And Methods: We analyzed 528 ascents of 8K peaks: 423 non-winter ascents without supplemental oxygen (Everest-210, K2-213), 76 ascents in winter without oxygen, and 29 in winter with oxygen. Read More

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Air particulate concentration during orthodontic procedures: a pilot study.

BMC Oral Health 2021 07 21;21(1):361. Epub 2021 Jul 21.

Department of Orthodontics, Universidad Alfonso X El Sabio, Madrid, Spain.

Background: This study evaluates the particle dispersion involved in dental procedures carried out during orthodontic treatments. Variants such as temperature and relative humidity in the dental cabinet were considered.

Methods: Using a particle counter, a pilot study was conducted, in which 98 consecutive recordings were made during appointments of patients undergoing orthodontic treatments. Read More

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MIRRA: A Modular and Cost-Effective Microclimate Monitoring System for Real-Time Remote Applications.

Sensors (Basel) 2021 Jul 5;21(13). Epub 2021 Jul 5.

IDLab-AIRO-Ghent University-imec, Technologiepark-Zwijnaarde 126, 9052 Zwijnaarde, Belgium.

Monitoring climate change, and its impacts on ecological, agricultural, and other societal systems, is often based on temperature data derived from official weather stations. Yet, these data do not capture most microclimates, influenced by soil, vegetation and topography, operating at spatial scales relevant to the majority of organisms on Earth. Detecting and attributing climate change impacts with confidence and certainty will only be possible by a better quantification of temperature changes in forests, croplands, mountains, shrublands, and other remote habitats. Read More

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FBG-Based Temperature Sensors for Liquid Identification and Liquid Level Estimation via Random Forest.

Sensors (Basel) 2021 Jul 3;21(13). Epub 2021 Jul 3.

Graduate Program in Electrical Engineering, Federal University of Espirito Santo (UFES), Vitória 29075-910, ES, Brazil.

This paper proposed a liquid level measurement and classification system based on a fiber Bragg grating (FBG) temperature sensor array. For the oil classification, the fluids were dichotomized into oil and nonoil, i.e. Read More

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The risks of warm nights and wet days in the context of climate change: assessing road safety outcomes in Boston, USA and Santo Domingo, Dominican Republic.

Inj Epidemiol 2021 Jul 19;8(1):47. Epub 2021 Jul 19.

Department of Environmental Health, Harvard T.H. Chan School of Public Health, 401 Park Drive, 4th Floor West, 404N, Boston, MA, 02215, USA.

Background: There remains a dearth of cross-city comparisons on the impact of climate change through extreme temperature and precipitation events on road safety. We examined trends in traffic fatalities, injuries and property damage associated with high temperatures and heavy rains in Boston (USA) and Santo Domingo (Dominican Republic).

Methods: Official publicly available data on daily traffic outcomes and weather conditions during the warm season (May to September) were used for Boston (2002-2015) and Santo Domingo (2013-2017). Read More

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Weather conditions associated with subarachnoid hemorrhage: a multicenter case-crossover study.

BMC Neurol 2021 Jul 19;21(1):283. Epub 2021 Jul 19.

Hans-Berger Department of Neurology, Jena University Hospital, Am Klinikum 1, 07747, Jena, Germany.

Background: Most spontaneous subarachnoid hemorrhages (SAH) occur unexpectedly and independently of classical risk factors. In the light of increasing climate variability and change, we investigated weather and rapid weather changes as possible short-term risk factors for SAH.

Methods: Seven hundred ninety one patients admitted to three major hospitals in Germany for non-traumatic SAH with a determinable onset of SAH symptoms were included in this hospital-based, case-crossover study. Read More

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Citric Acid-Mediated Abiotic Stress Tolerance in Plants.

Int J Mol Sci 2021 Jul 5;22(13). Epub 2021 Jul 5.

Graduate School of Environmental and Life Science, Okayama University, Okayama 700-8530, Japan.

Several recent studies have shown that citric acid/citrate (CA) can confer abiotic stress tolerance to plants. Exogenous CA application leads to improved growth and yield in crop plants under various abiotic stress conditions. Improved physiological outcomes are associated with higher photosynthetic rates, reduced reactive oxygen species, and better osmoregulation. Read More

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Prevalence and Risk Factors Associated With Antimicrobial Resistance in Bacteria Related to Bovine Respiratory Disease-A Broad Cross-Sectional Study of Beef Cattle at Entry Into Canadian Feedlots.

Front Vet Sci 2021 1;8:692646. Epub 2021 Jul 1.

Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada.

A broad, cross-sectional study of beef cattle at entry into Canadian feedlots investigated the prevalence and epidemiology of antimicrobial resistance (AMR) in , and , bacterial members of the bovine respiratory disease (BRD) complex. Upon feedlot arrival and before antimicrobials were administered at the feedlot, deep nasopharyngeal swabs were collected from 2,824 feedlot cattle in southern and central Alberta, Canada. Data on the date of feedlot arrival, cattle type (beef, dairy), sex (heifer, bull, steer), weight (kg), age class (calf, yearling), source (ranch direct, auction barn, backgrounding operations), risk of developing BRD (high, low), and weather conditions at arrival (temperature, precipitation, and estimated wind speed) were obtained. Read More

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The Role of Personal Experience and Prior Beliefs in Shaping Climate Change Perceptions: A Narrative Review.

Front Psychol 2021 2;12:669911. Epub 2021 Jul 2.

Centre for Decision Research, Leeds University Business School, University of Leeds, Leeds, United Kingdom.

Global climate change is increasing the frequency and intensity of extreme weather events such as heatwaves, droughts, and flooding. This is the primary way many individuals experience climate change, which has led researchers to investigate the influence of personal experience on climate change concern and action. However, existing evidence is still limited and in some cases contradictory. Read More

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Long-term variation of boundary layer height and possible contribution factors: A global analysis.

Sci Total Environ 2021 Jul 10;796:148950. Epub 2021 Jul 10.

Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou, Gansu, China.

Boundary layer height (BLH) plays an important role in regulating global weather/climate, as well as the dispersion and transportation of pollutants. Until now, however, the attribution and contributions of different controlling factors to BLH long-term variability and trends have not been quantified on a global scale. The long-term radiosonde dataset was used in this study to retrieve global BLH climatology; seasonal, diurnal, long-term variation and trends were analyzed over a 39-year period (1980-2018). Read More

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Identifying Sources of Faecal Contamination in a Small Urban Stream Catchment: A Multiparametric Approach.

Front Microbiol 2021 29;12:661954. Epub 2021 Jun 29.

UCD School of Biomolecular and Biomedical Science, UCD Earth Institute, and UCD Conway Institute, University College Dublin, Dublin, Ireland.

Small urban streams discharging in the proximity of bathing waters may significantly contribute to the deterioration of water quality, yet their impact may be overlooked. This study focuses on the Elm Park stream in the city of Dublin that is subject to faecal contamination by unidentified sources. The aim of the study was to identify a minimum number of "sentinel" sampling stations in an urban catchment that would provide the maximum amount of information regarding faecal pollution in the catchment. Read More

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[Sweat as an indicator of health].

Rev Med Suisse 2021 Jul;17(745):1289-1294

Centre de médecine du sport, Swiss Olympic Medical Center, Division de médecine physique et réadaptation, CHUV, 1011 Lausanne.

Sweat is a body fluid produced by the sweat glands and is mainly composed of water. Sweat has various functions, the two main ones being the evacuation of heat produced by the body, especially during exercise, and the maintenance of skin homeostasis. Its production is highly variable and depends on many individual and environmental factors. Read More

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Factors Affecting the Development of Bovine Respiratory Disease: A Cross-Sectional Study in Beef Steers Shipped From France to Italy.

Front Vet Sci 2021 28;8:627894. Epub 2021 Jun 28.

Department of Veterinary Medicine, University of Bari, Bari, Italy.

Bovine respiratory disease (BRD) is a complex, multifactorial syndrome and one of the major welfare and economical concerns for the cattle industry. This 1-year cross-sectional study was aimed at documenting the prevalence of BRD-related pathogens and clinical signs before and after a long journey and at identifying possible predisposition factors. Male Limousine beef steers ( = 169) traveling from France to Italy were health checked and sampled with Deep Nasopharyngeal Swabs (DNS) at loading (T0) and 4 days after arrival (T1). Read More

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Persistence of marine heat waves for coral bleaching and their spectral characteristics around Andaman coral reef.

Environ Monit Assess 2021 Jul 14;193(8):491. Epub 2021 Jul 14.

Indian National Centre for Ocean Information Services (INCOIS), Ministry of Earth Sciences (MoES), Hyderabad, India.

Coral reefs are fragile and endangered ecosystems in the tropical marine and coastal environment. Thermal stress due to marine heat waves (MHW) could cause significantly negative impacts on the health conditions, i.e. Read More

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Burrow characteristics and ecological significance of in the northeastern Qinghai-Tibetan Plateau.

Ecol Evol 2021 Jul 15;11(13):9100-9109. Epub 2021 Jun 15.

State Key Laboratory of Grassland Agro-Ecosystems Key Laboratory of Grassland Livestock Industry Innovation Ministry of Agriculture Lanzhou China.

Burrows provide burrowing animals with a place to hibernate, reproduce, and avoid predators and harsh weather conditions and thus have a vital impact on their survival. However, the general physical characteristics and ecological functions of burrows as well as whether there are differences in burrow traits under different terrains (e.g. Read More

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Adaptation to simultaneous warming and acidification carries a thermal tolerance cost in a marine copepod.

Biol Lett 2021 07 14;17(7):20210071. Epub 2021 Jul 14.

Department of Marine Sciences, University of Connecticut, Groton, CT 06340-6048, USA.

The ocean is undergoing warming and acidification. Thermal tolerance is affected both by evolutionary adaptation and developmental plasticity. Yet, thermal tolerance in animals adapted to simultaneous warming and acidification is unknown. Read More

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Predicting unsafe driving risk among commercial truck drivers using machine learning: Lessons learned from the surveillance of 20 million driving miles.

Accid Anal Prev 2021 Jul 10;159:106285. Epub 2021 Jul 10.

Farmer School of Business, Miami University, Oxford, OH 45056, USA. Electronic address:

The emergence of sensor-based Internet of Things (IoT) monitoring technologies have paved the way for conducting large-scale naturalistic driving studies, where continuous kinematic driver-based data are generated, capturing crash/near-crash safety critical events (SCEs) and their precursors. However, it is unknown whether the SCEs risk can be predicted to inform driver decisions in the medium term (e.g. Read More

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Adaptive drift and barrier-avoidance by a fly-forage migrant along a climate-driven flyway.

Mov Ecol 2021 Jul 13;9(1):37. Epub 2021 Jul 13.

Estación Biológica de Doñana, CSIC. Cartuja TA-10, Edificio I, Calle Américo Vespucio, s/n, 41092, Sevilla, Spain.

Background: Route choice and travel performance of fly-forage migrants are partly driven by large-scale habitat availability, but it remains unclear to what extent wind support through large-scale wind regimes moulds their migratory behaviour. We aimed to determine to what extent a trans-equatorial fly-forage migrant engages in adaptive drift through distinct wind regimes and biomes across Africa. The Inter-tropical Front (ITF) marks a strong and seasonally shifting climatic boundary at the thermal equator, and we assessed whether migratory detours were associated with this climatic feature. Read More

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Facile Fabrication of Densely Packed TiC MXene/Nanocellulose Composite Films for Enhancing Electromagnetic Interference Shielding and Electro-/Photothermal Performance.

ACS Nano 2021 Jul 12. Epub 2021 Jul 12.

State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China.

The development of modern electronics has raised great demand for multifunctional materials to protect electronic instruments against electromagnetic interference (EMI) radiation and ice accretion in cold weather. However, it is still a great challenge to prepare high-performance multifunctional films with excellent flexibilty, mechanical strength, and durability. Here, we propose a layer-by-layer assembly of cellulose nanofiber (CNF)/TiCT nanocomposites (TM) on a bacterial cellulose (BC) substrate repeated spray coating. Read More

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Evaluating the Drought Tolerance of Seven Potato Varieties on Volcanic Ash Soils in a Medium-Term Trial.

Front Plant Sci 2021 25;12:693060. Epub 2021 Jun 25.

Instituto de Investigaciones Agropecuarias, INIA Remehue, Osorno, Chile.

One of the main factors limiting the productivity of potatoes ( L.) is water stress. Two irrigation systems: full irrigation (I) and rainfed conditions (R), were compared over the growing seasons from 2012-13 to 2019-20. Read More

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[MORPHOLOGICAL CHANGES IN THE SKIN OF GUINEA PIGS AFTER THE IMPACT OF LOCAL UVA EXPOSURE].

Georgian Med News 2021 May(314):162-166

3National University of Pharmacy, Kharkiv, Ukraine.

It seems that safety of the impact of the UVA on the skin is associated with insidious identifying of early manifestation of damage and distant consequences of impact on the skin and the whole organism. The imagination of safety of UVA exposure has led to wide spread of radiator of UV rays of range A. This scientific research was devoted to identifying of positive and negative impact of UVA on the skin. Read More

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