scholarly journals Estudo da atuação do anticiclone subtropical do Atlântico Sul sobre a umidade relativa do ar no entorno do Parque Estadual do Rio Doce por meio de revisão sistêmica da literatura

ForScience ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. e00771
Author(s):  
Cristiano Alexandre Vieira ◽  
Neimar de Freitas Duarte ◽  
Fúlvio Cupolillo
Keyword(s):  
High Pressure ◽  
Weather Conditions ◽  
South Atlantic ◽  
Air Humidity ◽  
The South ◽  
Pressure System ◽  
Subtropical Anticyclone ◽  
Preventive Actions ◽  
Relative Air Humidity ◽  
Mechanisms Of Formation

O objetivo deste artigo foi realizar levantamentos na literatura em estudos sobre o Anticiclone Subtropical do Atlântico Sul e suas características relacionadas à umidade relativa do ar. O levantamento foi baseado no método de revisão bibliográfica sistemática. A pesquisa foi realizada por meio de consulta nas bases de dados: Google Acadêmico, Capes e Scielo. Verificamos que o tema “Anticiclone Subtropical do Atlântico Sul (ASAS)” é bastante discutido na literatura, tanto em relação aos mecanismos de formação dos sistemas de alta pressão quanto à sua influência sobre as condições meteorológicas. Alguns trabalhos abordaram temas referentes aos impactos advindos da presença deste sistema atmosférico e às questões socioambientais, notando-se, ainda, uma pequena quantidade de artigos e trabalhos que abordam ações preventivas que devem ser inseridas em épocas de ocorrência do ASAS. Palavras-chave: Influência do ASAS. Sistema de alta pressão. Dinâmica atmosférica.   Study of the action of the subtropical anticyclone of the South Atlantic on the relative air humidity in the surroundings of the Rio Doce State Park, through a systematic literature review AbstractThe objective of this article was to carry out surveys in the literature in studies on the South Atlantic Subtropical Anticyclone and its characteristics related to the relative humidity of the air. The survey was based on the systematic bibliographic review method. The research was carried out by consulting the databases: Google Acadêmico, Capes and Scielo. We found that the theme "South Atlantic Subtropical Anticyclone - ASAS" is widely discussed in the literature, both in the mechanisms of formation of high-pressure systems and their influence on weather conditions. Some works addressed issues related to the impacts arising from the presence of this atmospheric system and socioenvironmental issues. Still there is also a smallnumber of articles and works that address preventive actions in which they should be inserted in times of occurrence of ASAS. Keywords: Influence of ASAS. High Pressure System. Atmospheric dynamics.

scholarly journals Variability in the South Atlantic Anticyclone and the Atlantic Niño Mode*

2014 ◽  
Vol 27 (21) ◽  
pp. 8135-8150 ◽  
Author(s):  
Joke F. Lübbecke ◽  
Natalie J. Burls ◽  
Chris J. C. Reason ◽  
Michael J. McPhaden
Keyword(s):  
Wind Power ◽  
South Atlantic ◽  
Cold Tongue ◽  
Kelvin Wave ◽  
Equatorial Atlantic ◽  
The South ◽  
Pressure System ◽  
Cold Events ◽  
Meridional Advection ◽  
Sst Anomalies

Abstract Previous studies have argued that the strength of the South Atlantic subtropical high pressure system, referred to as the South Atlantic anticyclone (SAA), modulates sea surface temperature (SST) anomalies in the eastern equatorial Atlantic. Using ocean and atmosphere reanalysis products, it is shown here that the strength of the SAA from February to May impacts the timing of the cold tongue onset and the intensity of its development in the eastern equatorial Atlantic via anomalous tropical wind power. This modulation in the timing and amplitude of seasonal cold tongue development manifests itself via SST anomalies peaking between June and August. The timing and impact of this connection is not completely symmetric for warm and cold events. For cold events, an anomalously strong SAA in February and March leads to positive wind power anomalies from February to June resulting in an early cold tongue onset and subsequent cold SST anomalies in June and July. For warm events, the anomalously weak SAA persists until May, generating negative wind power anomalies that lead to a late cold tongue onset as well as a suppression of the cold tongue development and associated warm SST anomalies. Mechanisms by which SAA-induced wind power variations south of the equator influence eastern equatorial Atlantic SST are discussed, including ocean adjustment via Rossby and Kelvin wave propagation, meridional advection, and local intraseasonal wind variations.

scholarly journals The Prevention of Tipburn on Chinese Cabbage (Brassica rapa L. var. pekinensis (Lour.) Olson) with Foliar Fertilizers and Biostimulators

2016 ◽  
Vol 24 (1) ◽  
pp. 47-56
Author(s):  
Jan Borkowski ◽  
Barbara Dyki ◽  
Michał Oskiera ◽  
Aleksandra Machlańska ◽  
Anna Felczyńska
Keyword(s):  
Brassica Rapa ◽  
Chinese Cabbage ◽  
Foliar Application ◽  
Calcium Nitrate ◽  
Weather Conditions ◽  
Potassium Oxide ◽  
Air Humidity ◽  
Physiological Disorder ◽  
Relative Air Humidity ◽  
Young Leaves

AbstractInvestigations were carried out in 2008-2010 on Chinese cabbage (Brassica rapaL. var.pekinensis(Lour.) Olson). The main problem in cultivation of this vegetable is physiological disorder – tipburn. It is connected with low level of calcium in young leaves and with water deficiency. In 2008, seeds of Chinese cabbage were sown twice, in April and July. In July, the day temperature was high (25-30 °C) and relative air humidity was low (35-50%). In these conditions, the young leaves were injured heavily. Rotting was caused by the activity of bacteriaPectobacterium carotovorumsubsp.carotovorum(Jones) Hauben et al. However, three times foliar application of 1.5% calcium nitrate or 1.5% Wapnovit significantly reduced the tipburn. Also spraying with 0.03% of Tytanit (containing ions of titanium) or with 2.5% of Biochikol 020 PC (containing chitosan) gave similar effect. In these conditions, application of 1.5% K-300 (containing potassium oxide and ammonium nitrate) exacerbated symptoms of tipburn. Application of Wapnovit or Tytanit reduced instantly rotting of heads contrary to the application of their mixture. In autumn cultivation, when the relative air humidity was 80-100%, spraying with 1.5% solution of K-300 significantly decreased injuries in comparison to control. Application of Wapnovit, K-300, Biochikol, Tytanit or the mixture of Biochikol and calcium nitrate eliminated rotting. In experiments done in the springs of 2009 and 2010, when weather conditions were less favorable for tipburn appearance, a severity of it was lower but application of K-300 increased it appearance. In these experiments, Biochikol and Wapnovit eliminated rotting of heads. The results of three years of study have shown that calcium nitrate, Wapnovit, Tytanit and Biochikol limited occurrence of tipburn and bacterial rotting of Chinese cabbage, but the weather conditions during cultivation had the greatest impact on the severity of tipburn.

scholarly journals The influence of weather conditions on the course of pollen seasons of alder (Alnus spp.), hazel (Corylus spp.) and birch (Betula spp.) in Lublin (2001-2006)

2012 ◽  
Vol 61 (1) ◽  
pp. 53-57 ◽  
Author(s):  
Agnieszka Dąbrowska
Keyword(s):  
Pollen Season ◽  
Birch Pollen ◽  
Correlation Coefficients ◽  
Pollen Grains ◽  
Thermal Conditions ◽  
Weather Conditions ◽  
Air Humidity ◽  
Relative Air Humidity ◽  
Beginning Of Flowering ◽  
Pollen Seasons

The start and rate of florescence of <i>Alnus</i>, <i>Corylus</i> and <i>Betula</i> are dependent on meteorological conditions. In the present paper we have analysed the effect of mean, maximum and minimum temperature, relative air humidity and precipitation on the onset of the pollen season as well as on its length and annual count of pollen grains in alder, hazel and birch. The measurement of pollen fall was done by the gravimetric methods with the use of Durham sampler. Correlation coefficients were calculated between the determined characteristics of the pollen season and weather conditions. In the six-year research period 2001-2006 it was observed that low temperatures in January produced a delayed start of the pollen season in alder, hazel and birch. The beginning of flowering in these taxa was also influenced by thermal conditions prevailing directly before the season (ca. 10 days). The pollen season of the trees in question tended to be prolonged alongside with the increase in relative air humidity, but it was shortened due to higher temperatures. The volume of alder and hazel pollen release increased together with the rise in relative air humidity and precipitation. The annual counts of birch pollen increased along with rising temperature and decreasing relative air humidity and precipitation in the season.

scholarly journals Understanding the transport of Patagonian dust and its influence on marine biological activity in the South Atlantic Ocean

2010 ◽  
Vol 10 (11) ◽  
pp. 27283-27320
Author(s):  
M. S. Johnson ◽  
N. Meskhidze ◽  
V. P. Kiliyanpilakkil ◽  
S. Gassó
Keyword(s):  
Mineral Dust ◽  
Low Pressure ◽  
Remotely Sensed ◽  
South Atlantic ◽  
The South ◽  
Remotely Sensed Data ◽  
Pressure System ◽  
Transport Pathways ◽  
Dust Transport ◽  
Chl A

Abstract. The supply of bioavailable iron to the high-nitrate low-chlorophyll (HNLC) waters of the Southern Ocean through atmospheric pathways could stimulate phytoplankton blooms and have major implications for the global carbon cycle. In this study, model results and remotely-sensed data are analyzed to examine the horizontal and vertical transport pathways of Patagonian dust and quantify the effect of iron-laden mineral dust deposition on marine biological productivity in the surface waters of the South Atlantic Ocean (SAO). Model simulations for the atmospheric transport and deposition of mineral dust and bioavailable iron are carried out for two large dust outbreaks originated at the source regions of Northern Patagonia during the austral summer of 2009. Model-simulated horizontal and vertical transport pathways of Patagonian dust plumes are in reasonable agreement with remotely-sensed data. Simulations indicate that the synoptic meteorological patterns of high and low pressure systems are largely accountable for dust transport trajectories over the SAO. According to model results and retrievals from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO), synoptic flows caused by opposing pressure systems (a high pressure system located to the east or north-east of a low pressure system) elevate the South American dust plumes well above the marine boundary layer. Under such conditions, the bulk concentration of mineral dust can quickly be transported around the low pressure system in a clockwise manner, follow the southeasterly advection pathway, and reach the HNLC waters of the SAO and Antarctica in ~3–4 days after emission from the source regions of Northern Patagonia. Two different mechanisms for dust-iron mobilization into a bioavailable form are considered in this study. A global 3-D chemical transport model (GEOS-Chem), implemented with an iron dissolution scheme, is employed to estimate the atmospheric fluxes of soluble iron, while a dust/biota assessment tool (Boyd et al., 2010) is applied to evaluate the amount of bioavailable iron formed through the slow and sustained leaching of dust in the ocean mixed layer. The effect of iron-laden mineral dust supply on surface ocean biomass is investigated by comparing predicted surface chlorophyll-a concentration ([Chl-a]) to remotely-sensed data. As the dust transport episodes examined here represent large summertime outflows of mineral dust from South American continental sources, this study suggests that (1) atmospheric fluxes of mineral dust from Patagonia are not likely to be the major source of bioavailable iron to ocean regions characterized by high primary productivity; (2) even if Patagonian dust plumes may not cause visible algae blooms, they could still influence background [Chl-a] in the South Atlantic sector of the Southern Ocean.

scholarly journals Inner Radiation Belt Simulations of the Proton Flux Response in the South Atlantic Anomaly during the Geomagnetic Storm of 15 May 2005

2021 ◽  
Author(s):  
Kirolosse Mina Georges Zaki Girgis ◽  
Tohru Hada ◽  
Shuichi Matsukiyo ◽  
Akimasa Yoshikawa
Keyword(s):  
Geomagnetic Storm ◽  
Weather Conditions ◽  
South Atlantic ◽  
Low Earth Orbit ◽  
Proton Flux ◽  
Particle Simulation ◽  
The South ◽  
Simulation Code ◽  
South Atlantic Anomaly ◽  
Flux Response

A test particle simulation code was developed to simulate the inner proton belt response during the intense geomagnetic storm of May 15, 2005. The guiding center model was implemented in order to compute the proton trajectories with energy range 70-180 MeV. The time-varying magnetic field model implemented in the simulations was computed by the Tsyganenko model TS05 with the associated inductive electric field. One of the most important features of the Low-Earth Orbit (LEO) environment is the presence of the South Atlantic Anomaly, which imposes a dangerous radiation load on most of the LEO missions. The objective of this research is to investigate the proton flux variations in the anomaly region with respect to space weather conditions. The results showed that during the main phase of the geomagnetic storm, the proton flux in the SAA was decreased, whereas throughout the initial and recovery phases, the proton flux was increased at most of the altitudes. Numerical results were confirmed by satellite measurements.

scholarly journals Daily Activity Dynamics of Different Species (Diptera, Culicidae) of Blood-Sucking Mosquitoes in the South of the Tyumen Region

2020 ◽  
Vol 14 (1) ◽  
pp. 17-28
Author(s):  
Tatiana A. Khlyzova
Keyword(s):  
Daily Activity ◽  
Mosquito Species ◽  
Steppe Zone ◽  
Southern Taiga ◽  
Forest Steppe ◽  
Air Humidity ◽  
The South ◽  
Blood Sucking ◽  
Relative Air Humidity ◽  
Birch Forests

The purpose of the research is studying features of daily activity of different blood-sucking mosquito species from the southern taiga subareas, and aspen and birch forests of the Tyumen Region woodland and forest-steppe zone. Materials and methods. The researches were conducted in 2005–2015 in the south of the Tyumen Region in three natural environment and climatic areas (subareas), namely, the southern taiga, the aspen and birch forests, and the forest-steppe zone. The surveys were carried out in each of three subareas twice in the summertime, namely, in June and July. The census of biting mosquitoes was held using an entomological net with detachable sacs. An interval between the censuses held was 2 hours. The temperature, relative air humidity, wind velocity and precipitation were recorded simultaneously. In determining a species composition of the blood-sucking mosquito imago, special identification tables were applied; specific names were given in accordance with the current list of valid specific names. Results and discussion. Blood-sucking mosquito number in the south of the Tyumen Region is high within 24 hours. The maximum number and a peak in species diversity were observed at 11 p.m. in all-natural environment and climatic areas of the Region. In studying a 24-hour rhythm, attacks by 29 mosquito species of the Culicidae family, which belong to five genera, namely, Anopheles, Culiseta, Coquillettidia, Aedes and Culex were detected. In terms of temperature, they can roughly be divided into two groups. The first group (10 species) includes species that attack actively at 10 to 20°С, and the second group (19 species) includes species that attack actively at 10 to 30°С. High flight activity of mosquitoes can be observed at 12.6–26°С, relative air humidity of 54–99% and light intensity of 0–8600 lux. Given night temperatures are relatively high, the main factor that limits mosquito night activity is fog occurrence with air humidity up to 100%. One of the limiting factors for mosquitoes is strong wind; when wind velocity was 5 m/sec, attacks by few individual mosquitoes were only detected. The female mosquito activity is influenced by their overall number – the higher the mosquito number is, the harder they find a feeder and receive required blood meal.

scholarly journals Evidence for increased expression of the Amundsen Sea Low over the South Atlantic during the late Holocene

2018 ◽  
Author(s):  
Zoë Thomas ◽  
Richard T. Jones ◽  
Chris Fogwill ◽  
Jackie Hatton ◽  
Alan Williams ◽  
...  
Keyword(s):  
Southern Ocean ◽  
Late Holocene ◽  
Ice Core ◽  
South Atlantic ◽  
Falkland Islands ◽  
The South ◽  
Pressure System ◽  
Amundsen Sea ◽  
Atlantic Sector ◽  
Synoptic Conditions

Abstract. The Amundsen Sea Low (ASL) plays a major role in modulating the climate and environment of Antarctica and is of global importance in the Earth system. Unfortunately, a relative dearth of observational data across the Amundsen and Bellingshausen Seas prior to the satellite era (post-1979) limits our understanding of past behaviour and impact of the ASL. The limited proxy evidence for changes in the ASL are primarily limited to the Antarctic where ice core evidence suggests a deepening of the atmospheric pressure system during the late Holocene. However, no data has previously been reported from the northern side of the ASL. Here we report a high-resolution, multi-proxy study of a 5000 year-long peat record from the Falkland Islands (South Atlantic sector of the Southern Ocean), an area sensitive to contemporary ASL dynamics. In combination with climate reanalysis, we find a marked period of wetter, colder conditions most likely the result of enhanced southerly airflow between 5000 and 2500 years ago, and inconsistent with synoptic conditions associated with the ASL today. After 2500 years ago, drier and warmer conditions were established, implying more westerly airflow and the increased projection of the ASL onto the South Atlantic. Our results are in agreement with Antarctic ice core records and suggest the Falkland Islands provide a valuable location for reconstructing atmospheric circulation changes across a large sector of the Southern Ocean on multi-decadal to millennial timescales. The possible role of tropical Pacific in establishing contemporary-like synoptic circulation is explored.

scholarly journals THE INCIDENCE OF PAROXYSMAL ATRIAL FIBRILLATION DEPENDING ON WEATHER CONDITIONS

2017 ◽  
pp. 39-43
Author(s):  
A. N. Tsyrulnikova ◽  
A. E. Voropaeva ◽  
A. N. Aleynikova ◽  
V. N. Dotsenko
Keyword(s):  
Risk Factors ◽  
Atrial Fibrillation ◽  
Coronary Heart Disease ◽  
Heart Disease ◽  
Atmospheric Pressure ◽  
Weather Conditions ◽  
Meteorological Conditions ◽  
Emergency Medical Care ◽  
Air Humidity ◽  
Relative Air Humidity

Objective: to analyze the influence of different meteorological conditions: relative air humidity, atmospheric pressure, precipitation on the incidence of development of AF paroxysms. Material and methods. The study involved 259 patients with AF paroxysms who were admitted into the Cardiology ward of Gomel City Clinical Hospital of Emergency Medical Care during the period from November 2015 to January 2016. Results. We have determined the incidence of development of AF paroxysms depending on such weather conditions as atmospheric pressure, relative air humidity, cloudiness, and precipitation. Conclusion. Meteorological conditions have a direct effect on the occurrence of AF paroxysms. The determined risk factors in this case are: high relative humidity, fall of temperature and harsh precipitation and changes in atmospheric pressure. Also, the aggravating factor in the development of AF paroxysms was age of patients over 56 and a combination of coronary heart disease and hypertension.

Influence of meteorological conditions on ripening of grape shoots in south areas of Western Siberia

2020 ◽  
Vol 60 (1) ◽  
pp. 55-61
Author(s):  
G. A. Makarova
Keyword(s):  
Western Siberia ◽  
Weather Conditions ◽  
Growing Season ◽  
Meteorological Conditions ◽  
The South ◽  
Air Temperatures ◽  
Relative Air Humidity ◽  
Large Fluctuations ◽  
June July ◽  
Grape Varieties

Introduced grape varieties were studied in the south of Western Siberia in order to identify the effects of unfavourable factors of the growing season on the ripening of grape shoots. Weather conditions in the south of Western Siberia during the vegetation periods 2012-2017 were characterized by large fluctuations in water and temperature conditions; there were sharp changes not only in different years, but also during one season. Compared with long-term average data, a significant increase of relative air humidity and the amount of precipitation was noted from May to September. In 2016-2017 sharp changes of the amount of precipitation by months were marked (dry June, over-moistened July). The most unfavorable weather conditions for grape crop were the conditions of the growing season of 2013 with excessive rainfall (410.3 mm), very low average monthly air temperatures in May, June, July, September and the sum of active temperatures (2031.7°C). Under the influence of meteorological conditions, the terms of the beginning of the studied phenological phase changed very significantly over the years (30-62 days). Shoots ripening in years with favourable weather conditions (2012, 2015) began from July 14-August 1, with unfavorable (2013, 2017) — September 11-15. In one grape variety, insignificant variability of the degree of the studied character was revealed by years, in two — medium, in eight — high. Shoots ripened better in warmer and less humid 2012 (66.8-94.1 %) and in 2015 (58.4-92.5 %). Varieties with very poor ripening (33.0-46.9 %) Arkady, Kodryanka, Tomaysky are unsuitable for cultivation under production conditions and recommended for cultivation in amateur gardens with additional shelter. Varieties with maximum ripening of shoots on average over the years were selected from the American group White Pearls, Latvian Pink (83.1-84.9 %), Amurian Adel, Vaskovsky Souvenir, Hasan Bousa (65.5-79.3 %).

Capillary volume and evaporation of textile materials

2011 ◽  
Vol 7 (1) ◽  
pp. 1-15
Author(s):  
István Patay ◽  
Márk Montvajszki
Keyword(s):  
Weather Conditions ◽  
Secondary Effect ◽  
Air Humidity ◽  
Evaporation Surface ◽  
Total Evaporation ◽  
Textile Materials ◽  
Principal Influence ◽  
Relative Air Humidity ◽  
Evaporation Intensity ◽  
Main Factor

The objectives of the paper were to show that the evaporation intensity of water can be increased by the application of appropriate textile materials. The purpose was to determine the dependence of the evaporation intensity on the textile characteristics and the influence weather conditions on the evaporation intensity of different textiles. Five different textile strips of different widths and of single- and multi-layer were tested in definite experimental pots under open air conditions. The results of the experiments showed the total evaporation surface of the textiles depended on the texture material and the capillary volume of the textiles and the capillary volume had a limit at approximately Vc = 1000–1200 cm3/m2. Another important result was that the relative air humidity is a main factor of the weather conditions that has principal influence on the evaporation intensity. However, the other parameters — such as temperature, solar radiation and wind speed — have only a secondary effect on the evaporation intensity of textiles.

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