Earth’s oceans are changing colour due to climate change

More than half of the seas on Earth are green, according to NASA satellite images, as a result of climate change disrupting marine ecosystems.

Scientists have been prompted to investigate strange shifts in ocean color.

According to satellite data, 56% of the world's seas have seen a color change from blue to green during the past 20 years. The changes are most noticeable in tropical areas close to the equator.

According to researchers, the gradual greening of our seas indicates how climate change is affecting aquatic life.

What is causing the ocean to get green?

Over half of the world's seas gradually changed from blue to mostly green colours, as observed by NASA's Modis-Aqua satellite. Greater than the whole surface of the planet, the area has changed color.

After analyzing the NASA data, BB Cael and his colleagues at the National Oceanography Centre in Southampton, UK, concluded that the green coloring is a symptom of ecological change brought on by climate change.

Although the nature of these changes and their precise origin are unknown, according to BB Cael, they are probably related to the phytoplankton that make up the majority of food chains. These creatures are essential for stabilizing our atmosphere and creating much of the oxygen we breathe.

The surface marine microbial community is already experiencing the consequences of climate change, according to the study.

Oceans that change color might be a sign of a deeper issue.

According to the study's authors, a shift in the ocean's color may indicate a change in the condition of its ecosystems. Greener tones imply higher phytoplankton activity whereas deeper blues suggest less life.

It provides a picture of what is occurring in the water's topmost layers.

However, due of the drastically different chlorophyll levels at the surface, the color of the ocean can shift from year to year. It is challenging to determine whether the transition from blue to green is a result of climate change.

Before seeing any patterns, scientists predicted that it may take up to 40 years of monitoring the ocean's color. Additionally, different satellites assess color variations in various ways. It means that it is frequently impossible to merge the data from each one.

In January 2024, NASA will launch the Pace mission to learn more about how the ocean's colors change. Plankton, aerosol, clouds, and the ocean ecology will all be observed.