Portuguese Sea and Atmosphere Institute

Improving on the spatial location of geostationary satellite-derived FRP by accounting for parallax effect

When a satellite observes the Earth at an angle, the apparent position of elevated features, such as mountains, clouds or fires in high terrain, can be shifted from their true ground location. This effect, which may be particularly pronounced in the case of geostationary platform...

Environmental DNA for detecting marine fish species: testing the volume of sampled water, markers and primers in a public oceanarium

To maximize the efficiency of marine fish detection using environmental DNA (eDNA) metabarcoding, methodological factors such as PCR amplification bias and sampled water volume must be carefully considered. In this study, we evaluated the influence of different genetic markers (C...

The Contribution of DAS to the Routine Monitoring of Seismicity in Oceanic Islands: The Case for Faial (Azores)

Distributed acoustic sensing (DAS) deployed on submarine telecom cables is bound to revolutionize the earthquake monitoring routine currently performed by seismic network operators, particularly in domains where most seismic activity originates offshore. In this work, we analyze...

Nutritional properties and traditional uses of a native palm species in West Africa

Abstract Palm trees (Arecaceae) are critically important worldwide, particularly in tropical regions where they provide essential resources for food, shelter, medicine, and income. The African oil palm, Elaeis guineensis holds particular significance in West Africa, as a vital nu...

Tracking Variability in Atmospheric, Oceanic, and Riverine Inputs to the Iberian Margin Over the Last 250 kyr

Abstract The Iberian Margin provides an exceptional archive of climate variability due to its high sedimentation rates. However, uncertainties persist regarding the provenance of terrigenous detrital sediments on the Iberian Margin, and the climate‐driven changes in their source...

A compilation of global bio-optical in situ data for ocean-colour satellite applications – version four

Abstract. A global in situ dataset for validation of satellite products from the ESA Ocean Colour Climate Change Initiative (OC-CCI) is presented. This version of the compilation, with data starting in 1996, extends to 2025, which is important for the validation of recent algorit...

Bivalve Gut Microbiome Responses to Sediment Characteristics and Anthropogenic Activities in Cerastoderma edule (Linnaeus, 1758)

Abstract Estuaries are dynamic ecosystems influenced by fluctuating environmental conditions and sediment-associated contamination, which may affect host-associated microbiomes. This study investigated the gut microbiome of the bivalve Cerastoderma edule across three estuarine si...

Quaternary Arctic planktonic foraminifera: morphological differentiation and taxonomic reassessment of subpolar spinose taxa

Abstract. Planktonic foraminifera in the modern Arctic Ocean are dominated by the non-spinose polar species Neogloboquadrina pachyderma. Acmes of two spinose, presumed subpolar taxa in Quaternary central Arctic sediment cores are therefore anomalous, implying significantly differ...