Article
Environmental Sciences
Daniel Ford, Gavin H. Tilstone, Jamie D. Shutler, Vassilis Kitidis, Polina Lobanova, Jill Schwarz, Alex J. Poulton, Pablo Serret, Tarron Lamont, Mateus Chuqui, Ray Barlow, Jose Lozano, Milton Kampel, Frederico Brandini
Summary: This study evaluated the performance of MODIS-A algorithms for chlorophyll a, net primary production, and net community production in the South Atlantic Ocean using in situ and satellite data, and generated a 16-year time series to investigate the impacts of climate and environmental drivers on net community production.
REMOTE SENSING OF ENVIRONMENT
(2021)
Review
Oceanography
Kirsty A. McQuaid, Amelia E. H. Bridges, Kerry L. Howell, Tiago B. R. Gandra, Vitor de Souza, Jock C. Currie, Oliver T. Hogg, Tabitha R. R. Pearman, James B. Belle, Lara J. Atkinson, Diane Baum, Jarbas Bonetti, Alvar Carranza, Omar Defeo, Thomas Fureym, Maria A. Gasalla, Neil Golding, Shannon L. Hampton, Sebastian Horta, Daniel O. B. Jones, Amanda T. Lombards, Eleonora Manca, Yamandu Marin, Stephanie Martin, Pal Mortensen, Cecilia Passadore, Nils Piechaud, Kerry J. Sink, Andrew Yool
Summary: Marine Spatial Planning (MSP) is vital for developing national blue economy plans and addressing the impacts of human activities and climate change. In areas beyond national jurisdiction, MSP is proposed as a solution for multi-sectoral management. This study focuses on the South Atlantic and identifies habitat classes that represent variation in biological diversity. The insights gained from this research can support sustainable use and conservation of biodiversity beyond national jurisdiction.
PROGRESS IN OCEANOGRAPHY
(2023)
Article
Environmental Sciences
F. H. Coutinho, F. A. B. von Meijenfeldt, J. M. Walter, J. M. Haro-Moreno, M. Lopez-Perez, M. C. van Verk, C. C. Thompson, C. A. N. Cosenza, L. Appolinario, R. Paranhos, A. Cabral, B. E. Dutilh, F. L. Thompson
Summary: The microbiome of the South Atlantic Ocean has unique taxonomic and functional composition at different depths, driven by physical and chemical parameters. Genomes obtained from various depth zones include poorly characterized taxa of Bacteria and Archaea. The viral communities in the water column vary in response to shifts in microbial counterparts, targeting different hosts.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Andres Pinango, Rodrigo Kerr, Iole Beatriz Marques Orselli, Andrea da Consolacao Oliveira Carvalho, Elias Azar, Johannes Karstensen, Carlos Alberto Eiras Garcia
Summary: This study analyzed the changes in the carbonate system properties and C-ant accumulation rates in the South Atlantic. The results showed that from 1989 to 2019, the average change in C-ant column inventory was 0.94 mol C m(-2) yr(-1), with C-ant accumulation rates of 0.89 mu mol kg(-1) yr(-1) and 0.30 mu mol kg(-1) yr(-1) in central and intermediate waters, respectively. Additionally, higher acidification rates were observed in intermediate waters, and increased remineralization was found near the African coast.
GLOBAL BIOGEOCHEMICAL CYCLES
(2022)
Article
Geosciences, Multidisciplinary
Natasha Costa, Regina R. Rodrigues
Summary: Based on scenarios from CMIP6, significant positive trends in frequency, duration, and intensity of Marine Heatwaves (MHWs) are identified in the western South Atlantic, potentially leading to a near-permanent state of MHW in the region. The main mechanism causing MHWs, atmospheric blocking, is likely to intensify in the future, emphasizing the urgency for global reduction in greenhouse gas emissions.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Oceanography
Cristina Arumi-Planas, Maria Dolores Perez-Hernandez, Josep L. Pelegri, Pedro Velez-Belchi, Mikhail Emelianov, Veronica Cainzos, Luis Cana, Yvonne L. Firing, Luis Garcia-Weil, Daniel Santana-Toscano, Alonso Hernandez-Guerra
Summary: The South Atlantic Ocean plays a crucial role in the heat exchange of the climate system by hosting the returning flow of the Atlantic Meridional Overturning Circulation (AMOC). Through data analysis from hydrographic cruises, we have identified different water masses and calculated their circulation patterns in the South Atlantic Subtropical gyre. We have also assessed the strength of the AMOC, heat transport, and freshwater flux in this region.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Marine & Freshwater Biology
N. M. Menezes, C. S. McFadden, R. J. Miranda, J. A. C. C. Nunes, L. Lolis, F. Barros, C. L. S. Sampaio, T. K. Pinto
Summary: This study identified two harmful non-native octocorals in a tropical rocky reef in Brazil, the 'blue polyps' genus Sarcothelia (Xeniidae), likely an undescribed cryptic species native to Hawaii, and Briareum hamrum (Briareidae) from the Indian Ocean. Sarcothelia sp. was dominant in the reef, while B. hamrum was only found outside the sampling area. The octocorals were in physical contact with native benthic organisms, highlighting the potential impact of irresponsible marine aquarium releases as a vector for introducing invasive species to Brazilian reefs.
JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM
(2021)
Article
Meteorology & Atmospheric Sciences
Zhaoxiangrui He, Aiguo Dai, Mathias Vuille
Summary: The South American climate is influenced by both Atlantic Multidecadal Variability (AMV) and Pacific Multidecadal Variability (PMV), with complex correlations observed between precipitation and temperature changes. The perturbations in local circulations play a key role in driving these anomalies, with varying patterns observed in different seasons and regions.
JOURNAL OF CLIMATE
(2021)
Article
Environmental Sciences
Wan-Ling Tseng, Yu-Chi Lee, Yi-Chi Wang, Huang-Hsiung Hsu, Noel Keenlyside
Summary: This study aims to characterize the Atlantic symmetric pattern (ASP) which is established by the South America summer monsoon over the Atlantic Ocean during January and February. The ASP is manifested as two anomalous cyclonic-anticyclonic-cyclonic circulation trains aligned meridionally over the Atlantic, with distinct sea surface temperature (SST) dipole of the Southwest Atlantic Ocean and a tripole of the North Atlantic Ocean. The ASP is excited by convective activity in the SA summer monsoon and has important implications for linking South Atlantic SST, the SA summer monsoon, and North Atlantic climate.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Acoustics
Joseph Iafrate, Eric Reyier, Bonnie Ahr, Alexandra Carroll, Aaron N. Rice, Georges Dossot, Stephanie L. Watwood, Debra Murie
Summary: An unmanned surface vehicle was used to study the coastal soundscape and discovered a previously unidentified fish chorus. This finding provides an opportunity to identify previously undocumented biological sound sources in coastal habitats.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2023)
Article
Multidisciplinary Sciences
Taina M. L. Pinho, Cristiano M. Chiessi, Rodrigo C. Portilho-Ramos, Marilia C. Campos, Stefano Crivellari, Rodrigo A. Nascimento, Ana L. S. Albuquerque, Andre Bahr, Stefan Mulitza
Summary: Subtropical ocean gyres play a crucial role in modulating the global climate system by redistributing energy between low and high latitudes. Recent poleward displacements of the subtropical gyres may increase oceanic CO2 release, impacting climate system dynamics. Paleoceanographic records offer insights into meridional variations of subtropical gyres and their consequences on climate.
SCIENTIFIC REPORTS
(2021)
Review
Oceanography
N. Aubone, E. D. Palma, A. R. Piola
Summary: The maximum sea surface salinity region (MSR) in the South Atlantic is determined by ocean processes and influenced by the interaction of atmospheric forcing and oceanic processes. The balance of the MSR is primarily dominated by evaporative surface fluxes and entrainment.
PROGRESS IN OCEANOGRAPHY
(2021)
Article
Environmental Sciences
Hui Gao, Wei-Jun Cai, Meibing Jin, Changming Dong, Amanda H. Timmerman
Summary: The South Atlantic Ocean is an important region for anthropogenic CO2 uptake and storage. Using a multiple linear regression method with characteristic water masses, this study estimated the change in anthropogenic CO2 between the 1980s and 2010s in the South Atlantic Ocean. The overall increase rate was found to be 3.86 Pg C decade(-1), with differences observed between the western and eastern basins.
GLOBAL BIOGEOCHEMICAL CYCLES
(2022)
Article
Meteorology & Atmospheric Sciences
Teresa Losada, Belen Rodriguez-Fonseca, C. Roberto Mechoso, Elsa Mohino, Antonio Castano-Tierno
Summary: This paper investigates the dependence of interannual tropical Atlantic-Pacific basin interactions on convection-related features and their climatology. Through experimental simulations, the results show that changes in tropical convection patterns have significant impacts on the interactions between tropical basins.
JOURNAL OF CLIMATE
(2022)
Article
Oceanography
C. Z. Lazaneo, P. H. R. Calil, A. Tandon, I. C. A. da Silveira
Summary: Mesoscale eddies in the South Atlantic propagate westward and interact with the Vitoria-Trindade Ridge, leading to the formation of submesoscale coherent vortices (SCVs). The dynamics of two adjacent SCVs wandering through the ridge are described using high-resolution measurements. It is found that the anticyclonic SCVs exhibit low potential vorticity and angular momentum, and are prone to small-scale turbulence and energy dissipation.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
