Tag

Sediment Analysis

All articles tagged with #sediment analysis

science-and-environment1 year ago

"Mars's Influence on Earth's Deep Ocean Circulation Uncovered"

A new study suggests that Mars may be influencing Earth's deep ocean currents, driving "giant whirlpools" through a gravitational interaction that affects the shape of their orbits and the distance from the sun. These 2.4 million-year cycles correlate with warmer climates and more vigorous ocean currents, but are not linked to current human-caused warming. The study's authors also propose that these eddies could potentially mitigate the impacts of a potential collapse of the Atlantic Meridional Overturning Circulation (AMOC), a crucial ocean circulation system. However, some experts caution that the link between Mars and ocean circulation is speculative, and the evidence for deep ocean circulation being stronger in warm climates is thin.

environment1 year ago

"Microplastics Threaten Accuracy of Ancient Rock Age Markers"

Microplastics have been found to seep through layers of rock, making their presence in rock strata an unreliable indicator of the beginning of the Anthropocene epoch. A study analyzing sediment samples from three lakes in Latvia revealed that smaller plastic particles could travel deeper into the mud, reaching layers predating the acceleration of plastic production in the 1950s. This challenges the use of plastic presence in rock strata as a marker for human impact on the planet. The study identified 14 different types of plastic in the sediment samples, highlighting the pervasive nature of microplastics in the environment and their potential to impact natural cycles and food chains.