scholarly journals Key Features and Adverse Weather of the Named Subtropical Cyclones over the Southwestern South Atlantic Ocean

Atmosphere ◽  
2018 ◽  
Vol 10 (1) ◽  
pp. 6 ◽  
Author(s):  
Michelle Reboita ◽  
Rosmeri da Rocha ◽  
Débora Oliveira
Keyword(s):  
Atlantic Ocean ◽  
Vertical Wind Shear ◽  
Moisture Flux ◽  
Weather Conditions ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
Brazilian Coast ◽  
Adverse Weather Conditions ◽  
Wide Range ◽  
Adverse Weather

This work documents the main features of six subtropical cyclones occurred between the years 2010 and 2016 over the southwestern South Atlantic Ocean, near the Brazilian coast, which received names (with the exception of one) from the Brazilian Navy Hydrographic Center. The fine-resolution ERA5 reanalysis and rainfall estimates from the Tropical Rainfall Measuring Mission (TRMM) were used to describe the synoptic environment and the adverse weather conditions during the six events. The support of a small-amplitude trough at mid-levels or a cut-off low, weak vertical wind shear, and moisture flux convergence are the main features contributing to the subtropical cyclogenesis at the surface. On the other hand, sea surface temperature (SST) presents a secondary contribution since the cyclones develop over the ocean with a wide range of SST values (from 22.5 °C to 28.6 °C in the initial phase of cyclones). The six subtropical cyclones are less deep in the atmosphere column than the tropical ones and, unlike the extratropical cyclones, they have little or no westward tilt with an increase in height. The studied subtropical cyclones produced adverse weather conditions such as (a) strong winds (reaching 17 m·s−1 at 10 m high) for a long period occurring east/southeastward of the cyclone center, and (b) high amounts of rainfall along the southeastern coast of Brazil, where the accumulated rainfall varied between 170 to 350 mm, being in most cases higher than the monthly climatology. Over the continent, the Brazilian states of Rio de Janeiro and Espírito Santo were the most affected by the intense rainfall associated with the cyclones.

scholarly journals A Review of Detection and Removal of Raindrops in Automotive Vision Systems

2021 ◽  
Vol 7 (3) ◽  
pp. 52
Author(s):  
Yazan Hamzeh ◽  
Samir A. Rawashdeh
Keyword(s):  
Detrimental Effect ◽  
Weather Conditions ◽  
Traffic Sign ◽  
Survey Paper ◽  
Sign Recognition ◽  
Adverse Weather Conditions ◽  
Wide Range ◽  
Adverse Weather ◽  
Protective Cover

Research on the effect of adverse weather conditions on the performance of vision-based algorithms for automotive tasks has had significant interest. It is generally accepted that adverse weather conditions reduce the quality of captured images and have a detrimental effect on the performance of algorithms that rely on these images. Rain is a common and significant source of image quality degradation. Adherent rain on a vehicle’s windshield in the camera’s field of view causes distortion that affects a wide range of essential automotive perception tasks, such as object recognition, traffic sign recognition, localization, mapping, and other advanced driver assist systems (ADAS) and self-driving features. As rain is a common occurrence and as these systems are safety-critical, algorithm reliability in the presence of rain and potential countermeasures must be well understood. This survey paper describes the main techniques for detecting and removing adherent raindrops from images that accumulate on the protective cover of cameras.

scholarly journals First record of Flabellina dana Millen and Hamann, 2006 (Mollusca: Nudibranchia) in the South Atlantic Ocean

Check List ◽  
2011 ◽  
Vol 7 (6) ◽  
pp. 880 ◽  
Author(s):  
Licia Sales ◽  
Marlon Delgado ◽  
Vinicius Queiroz ◽  
Vinicius Padula ◽  
Cláudio L. S. Sampaio ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Geographic Distribution ◽  
Caribbean Sea ◽  
First Record ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
Brazilian Coast ◽  
The South ◽  
The Bahamas ◽  
The Caribbean

The nudibranch Flabellina dana Millen and Hamann, 2006 is reported from two localities in the northeastern Brazilian coast. These are the first records of this species, previously recorded from localities in the Bahamas and the Caribbean Sea, in South Atlantic Ocean, extending its known geographic distribution more than 3500 km southward.

scholarly journals Ages of the Magmatism and the Opening of the South Atlantic Ocean

1998 ◽  
Vol 25 (2) ◽  
pp. 47 ◽  
Author(s):  
ANA MARIA PIMENTEL MIZUSAKI ◽  
ANTONIO THOMAZ FILHO ◽  
PEDRO DE CESERO
Keyword(s):  
Atlantic Ocean ◽  
Process Development ◽  
Volcanic Rocks ◽  
River Mouth ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
Geochemical Data ◽  
Brazilian Coast ◽  
The South ◽  
Break Up

The analysis of published and unpublished 368 K/Ar radiometric ages of basic, intermediate and alkaline volcanic rocks, related to the post-Paleozoic magmatism linked to the opening of the South Atlantic Ocean, yields some important evidence concerning the break up of the Gondwana supercontinent. At the Brazilian Equatorial margin, the Gondwana break up started in the Permo-Triassic, when the opening of the Equatorial South Atlantic Ocean began and spread out south-eastward up to the present day Amazon River mouth. During the middle Jurassic/lower Cretaceous (pre-Aptian), the continuity of this separation, towards the Potiguar Basin, was coeval with the northward opening of the south-east Brazilian margin, up to the Espírito Santo State latitude. The relationship between large volcanic events in the basins and the resistance to the rifting process development offered by the cratonic area was shown by the trend of the magmatic age. Along the equatorial margin, the fragmentation resistance caused by the São Luis / West African craton is manifested by a large basic magmatism described in the Tacutu, Acre, Solimões, Amazonas and Parnaíba basins. A similar mechanism along the south-east margin, is proposed for the magmatism described in the Paraná Basin which is associated with the fracturing resistance offered by the São Francisco/Congo cratonic area. The integration of geochronological, micropalentological, sedimentological and geochemical data from the basins of the east Brazilian continental margin supports a model to explain the final disruption between South America and Africa during Cenonian/Turonian time. This model implies that 90 Ma basic magmatic rocks, related to the oceanic crust formation, probably occur offshore from the present-day eastern Brazilian coast line.

scholarly journals New species of bone-eating worm Osedax from the abyssal South Atlantic Ocean (Annelida, Siboglinidae)

ZooKeys ◽  
2019 ◽  
Vol 814 ◽  
pp. 53-69 ◽  
Author(s):  
Yoshihiro Fujiwara ◽  
Naoto Jimi ◽  
Paulo Y.G. Sumida ◽  
Masaru Kawato ◽  
Hiroshi Kitazato
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Atlantic Ocean ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
Brazilian Coast ◽  
The South ◽  
Trunk Length ◽  
Molecular Phylogenetic ◽  
A New Species

A new species of bone-eating annelid, Osedaxbraziliensissp. n., found in a sunken whale carcass at a depth of 4,204 m at the base of the São Paulo Ridge in the South Atlantic Ocean off the Brazilian coast is described. The organism was retrieved using the human-occupied vehicle Shinkai 6500 during the QUELLE 2013 expedition. This is the 26th species of the genus and the first discovery from the South Atlantic Ocean, representing the deepest record of Osedax worldwide to date. This species morphologically resembles Osedaxfrankpressi but is distinguished by the presence of a yellow bump or patch behind the prostomium and its trunk length. Molecular phylogenetic analysis using three genetic markers (COI, 16S, and 18S) showed that O.braziliensissp. n. is distinct from all other Osedax worms reported and is a sister species of O.frankpressi.

scholarly journals A HIGH-FIDELITY ARTIFICIAL AIRPORT ENVIRONMENT FOR SESAR APOC VALIDATION EXPERIMENTS

2017 ◽  
Vol 8 (1) ◽  
pp. 31-50 ◽  
Author(s):  
Florian Piekert ◽  
Nils Carstengerdes ◽  
Sebastian Schier ◽  
Reiner Suikat ◽  
Alan Marsden
Keyword(s):  
Situation Awareness ◽  
Weather Conditions ◽  
High Fidelity ◽  
Airport Management ◽  
Traffic System ◽  
Adverse Weather Conditions ◽  
Artificial Environment ◽  
Wide Range ◽  
Adverse Weather ◽  
Before And After

Europe’s SESAR Program develops a wide range of solutions to increase the performance of the Air Traffic System. At airport level, the Airport Operations Center (APOC) is expected to provide the most benefit in adverse weather conditions, being the ultimate communication platform to pursue the Total Airport Management (TAM) Collaborative Decision Making Process. It will increase mutual and common situation awareness and allows the joint definition and implementation of the operational strategy. The assessment of APOC benefits in a live airport environment is rather limited and requires implementation and “right” weather and traffic situations. This work argues for validation trials in high fidelity artificial airport environments as a more reliable and less costly alternative which allows comparison between operations before and after implementation of new solutions. Based on requirements provided by SESAR concept documentation and from live operations this work presents an approach for such a high fidelity artificial environment.

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