A dataset of temperature and salinity in the South Brazil Bight: Identifying water mass interfaces

Abstract

Temperature and salinity data were recorded at the slope and outer shelf of the South Brazil Bight, from November 2014 to February 2015 using an Underwater Autonomous Vehicle, specifically, a glider. During the mission, the slope was crossed 10 times, reaching depths of up to 970 m and with a sampling rate of one record per second. The density profiles were also calculated to estimate interface levels between Tropical Water (TW) and South Atlantic Central Water (SACW), and between SACW and Antarctic Intermediate Water (AAIW). The interface levels are presented in cross section figures and the raw dataset is provided in netCDF files, including scientific and navigation datasets.

Assessment of prokaryotic communities in Southwestern Atlantic deep-sea sediments reveals prevalent methanol-oxidising Methylomirabilales

“…Under deep-sea conditions, adaptations for psychrophilic and piezophilic lifestyles may confer advantages. Our sampling points ranged from 433 to 747 m deep where water temperatures can be as low as 5 °C for the Antarctic Intermediate Water mass 28 . Some traits, such as the expression of cold and shock proteins can have key roles in the cold seafloor 99 .…”

“…Under the hydrographic point of view, the area of study is localised in the transition between two water masses, the South Atlantic Central Water (SACW) and the Antarctic Intermediate Water (AAIW) 33 . The SACW (T ≤ 18.5 °C, S ≥ 35.3) occupies the pycnocline level, while the AAIW presents temperatures between 3 and 6 o C and salinities between 34.2 and 34.5 26 – 28 .…”

Mudanças Oceanográficas E Climáticas Nos Últimos 50 Mil Anos No Sudoeste Do Atlântico Com Base Em Registros De Paleo-Indicadores Orgânicos E Inorgânicos Na Margem Continental Do Rio De Janeiro, Brasil

“…Há evidências que nutrientes transportados por essa frente são responsáveis pela fertilização da água até pelo menos 24ºS e as consequentes florações de inverno de cianobactéria Trichodesmium (Burone et al, 2013;Rodrigues et al, 2014;Gu et al, 2018) e diatomáceas e dinoflagelados (Gonçalves-Araujo et al, 2018). (7,10) (0,45-0,46) ---a alquenonas (C37:2 + C37:3); b somatório de esteróis 27Δ 5,22 + 27Δ 5 + 28Δ 5,22 + 28Δ 5,24(28) + 28Δ 5 + 29Δ 5,22 (Figura 6.2d). Esta tendência pode ser atribuída à presença de uma grande fração de MO terrígena nestes períodos (Meyers, 1997).…”

Diversidade e Estrutura de Comunidades Microbianas em Áreas de Pockmarks e Diápiros de Sal na Margem Continental Brasileira (Sudoeste do Oceano Atlântico)

“…SB is limited to the north by Alto de Cabo Frio and to the south by Cabo Santa Marta Grande in Alto de Florianópolis [31,32]. Under the hydrographic point of view, the area of study is located in the transition between two water masses, the South Atlantic Central Water (SACW) and the Antarctic Intermediate Water (AAIW) [33]. The SACW (T ≤ 18.5 o C, S ≥ 35.3) occupies the pycnocline level [34],…”

“…In deep-sea conditions, adaptations for psychrophilic and piezophilic lifestyles may confer advantages. Our sampling points ranged from 433 to 747 m deep where water temperatures can be as low as 5°C for the Antarctic Intermediate Water mass [33,105]. Some traits, such as the expression of cold and shock proteins can have key roles in the cold seafloor [106] SB_MAG_00001 contains cspA and rhlB genes, which encode for the cold-shock protein and cold-shock dead-box protein-A, respectively, and have been suggested to have a role in the adaptation to cold conditions [107][108][109].…”