scholarly journals Asymmetric continental deformation during South Atlantic rifting along southern Brazil and Namibia

2017 ◽  
Vol 51 ◽  
pp. 170-176 ◽  
Author(s):  
Eric Salomon ◽  
Cees Passchier ◽  
Daniel Koehn
Keyword(s):  
South Atlantic ◽  
Southern Brazil ◽  
Continental Deformation

scholarly journals Record of Electrona paucirastra Bolin, 1962 (Pisces: Myctophiformes: Myctophidae) in Brazilian waters, with comments on the occurrence of Electrona risso (Cocco, 1829) in the western South Atlantic

Check List ◽  
2016 ◽  
Vol 12 (4) ◽  
pp. 1949
Author(s):  
Rodrigo A. Caires
Keyword(s):  
Sao Paulo ◽  
South Atlantic ◽  
São Paulo ◽  
Southern Brazil ◽  
Western Atlantic ◽  
First Time

Electrona risso, a warm circumtropical lanternfish species distributed in all oceans, has been reported in the western Atlantic from Suriname to Southern Brazil. Re-examination of specimens attributed to this species which presumably supported the southernmost record in the western South Atlantic and are available at Museu de Zoologia, Universidade de São Paulo, Brazil, revealed that they were misidentified and are really Electrona paucirastra. As a result, E. paucirastra is reported for the first time in southern Brazil and the distribution of E. risso in the western Atlantic is discussed.

scholarly journals The genus Melobesia (Corallinales, Rhodophyta) from the subtropical South Atlantic, with the addition of M. rosanoffii (Foslie) Lemoine

Phytotaxa ◽  
2014 ◽  
Vol 190 (1) ◽  
pp. 268 ◽  
Author(s):  
Vanessa Poletto Borges ◽  
Eduardo Bastos ◽  
Manuela Bernardes Batista ◽  
Zenilda Bouzon ◽  
Cintia Lhullier ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Measurement Data ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
Coralline Algae ◽  
Taxonomic Identification ◽  
Southern Brazil ◽  
Spore Dispersal ◽  
Epiphytic Algae ◽  
First Time

The calcareous crusted epiphytic algae are a group of extremely delicate, fragile and poorly studied algae. The subfamily Melobesioideae (Corallinophycidae, Rhodophyta) includes the genus Melobesia, which has no record of molecular analysis.However, thanks to measurement data, it was possible to find enough similarity for taxonomic identification of two species: Melobesia rosanoffii (Foslie) Lemoine, described for the first time in South Atlantic Ocean, and Melobesia membranacea (Esper) Lamouroux, first described in southern Brazil. The group has undergone several changes of classification from animals to plants. Today crusty coralline algae have great importance due to the possibility of easy spore dispersal between oceans.

scholarly journals Position of the South Atlantic Anticyclone and Its Impact on Surface Conditions across Brazil

2018 ◽  
Vol 57 (3) ◽  
pp. 535-553 ◽  
Author(s):  
Joshua M. Gilliland ◽  
Barry D. Keim
Keyword(s):  
Wind Speed ◽  
Sea Level ◽  
Surface Wind ◽  
South Atlantic ◽  
Atmospheric Conditions ◽  
Southern Brazil ◽  
The South ◽  
Sea Level Pressure ◽  
Level Pressure ◽  
Northern Brazil

AbstractThis study examines the surface wind characteristics of Brazil on the basis of the location of the maximum high pressure center in the South Atlantic basin (SAB), known as the South Atlantic anticyclone (SAA), from three reanalysis datasets for the period of 1980–2014. Linear wind speed trends determined for Brazil are geographically related to surface and macroscale atmospheric conditions found in the SAB. The daily mean position of the SAA exhibited a latitudinal poleward shift for all seasons, and a longitudinal trend was dependent upon extratropical activity found in the SAB. Results also show that wind speed and sea level pressure for northern Brazil are dependent upon the latitudinal position of the SAA. Consequently, surface wind correlations for southern Brazil tend to be related to changes in the longitudinal position of the SAA, which result from transient anticyclones migrating over the SAB. An examination of positive and negative wind anomalies shows that shifts in the position of the SAA are coupled with changes in sea level pressure for northern Brazil and air temperature for southern Brazil. From these findings, a surface wind analysis was performed to demonstrate how the geographical location of the SAA affects wind speed anomalies across Brazil and the SAB. Results from this study can assist in understanding how atmospheric systems change within the SAB so that forthcoming socioeconomic and climate-related causes of wind for the country of Brazil can be known.

Atmospheric characteristics favorable for the development of mesoscale convective complexes in southern Brazil

2020 ◽  
Vol 80 (1) ◽  
pp. 43-58
Author(s):  
FDS Moraes ◽  
FE Aquino ◽  
TL Mote ◽  
JD Durkee ◽  
KS Mattingly
Keyword(s):  
Amazon Basin ◽  
South Atlantic Convergence Zone ◽  
South Atlantic ◽  
Atmospheric Environment ◽  
Southern Brazil ◽  
The South ◽  
Average Maximum ◽  
Mesoscale Convective ◽  
The Usa ◽  
Upper Level Jet

Mesoscale convective complexes (MCCs) are meteorological events that result in severe storms, hail, flood, and tornadoes, but they are difficult to forecast. In South America (SA), MCCs are usually larger and last longer than those in the USA. Southern Brazil (SB) is one of their preferred regions of occurrence. This study’s objective was to contribute to the identification of the main physical characteristics and atmospheric environment that favors the occurrence of MCCs in SB and determine how these events are unique relative to other subtropical SA (OSSA) regions. Results indicate that SB MCCs last longer (+3 h) and their average maximum extent is at least 50000 km2 larger than OSSA MCCs. The atmospheric environment of SB MCCs meets the criteria already indicated in previous studies, with the northerly low-level jet (LLJ), which brings humidity from the Amazon Basin to the SB MCCs genesis area, coupling with the upper-level jet (ULJ). Moreover, SB MCCs have the South Atlantic as their second source of moisture, which is advected by anticyclonic circulation in the southwestern South Atlantic. This indicates that SB MCCs have unique characteristics compared to OSSA MCCs, including 2 main atmospheric circulation systems responsible for moisture advection to the SB genesis region. For comparison, OSSA MCCs are more dependent on the South Atlantic Convergence Zone (SACZ) and the advection of moisture by the LLJ from the Amazon Basin to north-central Argentina and west-central and southeast Brazil.

Acanthurus tractus Poey, 1860, a valid western Atlantic species of surgeonfish (Teleostei, Acanthuridae), distinct from Acanthurus bahianus Castelnau, 1855

Zootaxa ◽  
2011 ◽  
Vol 2905 (1) ◽  
pp. 63 ◽  
Author(s):  
MOISÉS A. BERNAL ◽  
LUIZ A. ROCHA
Keyword(s):  
Distinct Species ◽  
South Atlantic ◽  
Genetic Differences ◽  
Southern Brazil ◽  
The South ◽  
Caudal Fin ◽  
Western Atlantic ◽  
Dorsal Fin ◽  
Bright Yellow ◽  
Central Atlantic

The ocean surgeonfish, Acanthurus bahianus, has been historically recorded from Bermuda and Massachusetts to southern Brazil and the islands of the central Atlantic. We have found that individuals in the southwestern and central Atlantic consistently have a posterior bright yellow margin on the caudal fin and an orange/red margin on the dorsal fin. This coloration is different from the characteristic white/blue fin margins on individuals from the northwestern Atlantic. In addition, there is a clear genetic distinction (d= 2.4% mtDNA, CytB) between these two lineages. With the corroborating coloration and genetic differences, we suggest that these two lineages represent distinct species. The South Atlantic species retains the name of A. bahianus and we propose to resurrect A. tractus (Poey 1860) as the valid name for the northwestern Atlantic species.

scholarly journals A new deep sea species of Bathygnathia (Isopoda, Gnathiidea) from the western South Atlantic Ocean

1977 ◽  
Vol 26 (1) ◽  
pp. 11-19
Author(s):  
Plínio Soares Moreira
Keyword(s):  
Atlantic Ocean ◽  
Deep Sea ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
Southern Brazil ◽  
First Time

Bathygnathia magnifica sp.n., a new bathyal species of Gnathiidea (Crustacea, Isopoda), is described for science. It was collected from off southern Brazil, at 387 m depth. The present find seems of interest, not only because for the first time a species of Bathygnathia is reported at such a depth, but because it is the first species of the genus bearing eyes, in spite of depauperate.

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