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Mars's Gravity A Deep Ocean's Surprise

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March 13, 2024
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Mars’s Gravity: A Deep Ocean’s Surprise

by nasaspacenews
March 13, 2024
in Mars, News, Others
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Mars's Gravity A Deep Ocean's Surprise
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For decades, scientists have focused on the Moon’s influence on Earth’s oceans, but a new study reveals a surprising partner: Mars. Researchers from the University of Sydney and Sorbonne University have discovered a 2.4-million-year cycle linked to the gravitational interactions between Earth and Mars, impacting deep-sea circulation and potentially influencing past global warming patterns.

This groundbreaking research, published in Nature Communications, delves into the complexities of Earth’s climate on geological timescales. Unlike current rapid warming caused by human activity, this study explores how natural cycles might influence ocean circulation patterns over millions of years.

Unveiling the Deep: Reading the Sedimentary Record

The team, led by Dr. Adriana Dutkiewicz from the University of Sydney’s EarthByte Group, analyzed over 50 years of deep-sea drilling data from hundreds of locations worldwide. They focused on sedimentation patterns as a clue to past ocean current activity.

“A break in sedimentation indicates vigorous deep-sea currents, while continuous sediment accumulation indicates calmer conditions,” explains Dr. Dutkiewicz. “By combining this data with advanced analysis techniques, we were able to identify the frequency of these breaks over a staggering 65 million years.”

New evidence for an unexpected player in Earth's multimillion-year climate  cycles: the planet Mars

The Orbital Connection: A Celestial Dance

The researchers then investigated a potential link between these sedimentary shifts and changes in Earth’s orbit. Collaborating with Professor Dietmar Müller and Associate Professor Slah Boulila, they discovered a remarkable alignment – the vigor of deep-sea currents mirrored 2.4-million-year astronomical grand cycles.

These cycles are theorized to occur due to gravitational interactions between Earth and Mars. However, concrete evidence for their impact on Earth’s climate system has been elusive.

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“We were surprised to find such a clear signature of these cycles in our deep-sea data,” says Dr. Dutkiewicz. “It strongly suggests that Earth’s deep oceans respond to the gravitational nudges from Mars over vast timescales.”

Warmer, Whirlier Oceans: A Challenge to Current Models

The study revealed a fascinating twist: the 2.4-million-year cycles of stronger deep-sea circulation coincided with periods of warmer global climates. This finding contradicts current models suggesting that a warming climate, as we experience today, could lead to a stagnant ocean, potentially impacting crucial systems like the Atlantic Meridional Overturning Circulation (AMOC) that influences the Gulf Stream.

Professor Müller sheds light on this unexpected result: “The freezing and melting of sea ice isn’t the only factor influencing deep-sea circulation. In a warmer climate with stronger storms, deep-ocean eddies, like giant whirlpools, are predicted to intensify.”

These eddies can reach the seafloor, stirring up sediments and potentially influencing future ocean circulation patterns.

Beyond the AMOC: A More Complex Picture

Dr. Dutkiewicz emphasizes the importance of this research: “Our data suggests that warmer oceans might have more vigorous deep circulation, potentially offsetting the effects of a slowing AMOC.”

This finding highlights the complexities of Earth’s climate system and the need for a more nuanced understanding of the various processes at play. While the precise interplay between these factors remains under investigation, the study offers valuable insights for building more comprehensive climate models.

The Future of Climate Modeling: Accounting for the Celestial Dance

This research paves the way for a more holistic approach to climate modeling. By incorporating the influence of celestial mechanics and deep-sea dynamics, scientists can develop more robust predictions for the future of Earth’s climate.

Further research is needed to understand how these various mechanisms interact and influence ocean life over extended periods. However, the discovery of a link between Mars and Earth’s deep oceans opens a new chapter in our understanding of our planet’s complex climate system.

Tags: deep space imagingNASANASA missionspace discoveryspace research

FEATURED POST

A storm is pictured in the Arabian Sea less than 700 miles off the coast of Oman as the International Space Station orbited 260 miles above. NASA / Jasmin Moghbeli

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