JBCS

Metal concentrations below or at the typical lower limit for marine slope sediments. Metals originate from continental inputs to the continental shelf and eroded and transported from there to the slope region. No anthropic influence was detected on metal concentrations.

Studies published between 2000 and early 2022 about the CO₂ fluxes show that, in general, the Brazilian continental shelf behaves as a sink of atmospheric CO₂ at its north and south areas, and as a source of CO₂ at the northeast and southeast regions. However, the presence of different coastal ecosystems and the seasonal variability can change those behaviors.

Provenance of PAH to sediments of the Solimões River and some associated lakes.

Two scenarios of the carbon dioxide fluxes at the Jaguaribe River estuary (FCO₂); the first is during july 2015 (direct pCO₂ measurements) and the second is during november 2015 (indirect pCO₂ measurements).

The variation of pH in the estuarine systems follows the biogeochemical properties and the salinity contributes to the buffering capacity that maintain the seawater pH (~ 8) stable (1). The pH decreasing (acidification) affects the water properties influencing the nutrients balance. PID flux shows a behavior that is related to the sediment texture, biota presence, pH and salinity variation (2).

Determination of sources of organic matter to Itapicuru River estuary (Bahia, Brazil) through the analysis of isotopes (δ¹³C and δ¹⁵N) and n-alkanes.

Sectoral comparisons of natural and anthropogenic N and P (t yr^-1) emissions over a 27-year time series (1990-2016) in tropical watersheds, associated with population density and rainfall.

Ocean full of PFAS.

Marine aerosols play an important role in the global carbon cycle and in the Earth's climate.

Example of incorrect disposal of plastics that are destined for Amazonian rivers, and that through factors such as: UV rays, wind, water, fragment into microplastics, which can be ingested by Amazonian fish species or transported from rivers to the ocean.

Unconventional polyaromatics and mercury environmental levels in the Todos os Santos Bay, Brazil.