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African dust crosses the Atlantic

ScienceDaily (April 20, 2022)

Titre : African dust crosses the Atlantic

A beautiful sunset over the Atlantic off the Florida coast, or an orangey glow in the Texas sky at dusk may be caused by dust from West Africa, according to researchers who are looking at the paths of particulate matter in the skies over the Sahara desert and the semi-arid Sahel.

ScienceDaily (April 20, 2022)

The researchers can measure the amounts of dust that reach the Western Atlantic near Miami, Barbados and Puerto Rico for example, because there are ample meteorological and other measurement stations in those areas, but in West Africa and places like Cabo Verde, there are few ground-based measurement facilities to measure the dust reaching there.

Researchers must then rely on satellite-based measurements, which cannot provide measurement at night. The data collected by ground-based and satellite instruments is used as the basis for models that estimate the paths and amounts of dust hitting West Africa in the winter and the Atlantic and Caribbean in the summer. However, there are so few measurement stations in Africa — because the stations require electricity, cell phones, internet and someone to maintain them — that the models are somewhat incomplete.

Story Source  : Penn State

Annonce (ScienceDaily)

Page publiée le 12 janvier 2023