How can satellite imagery be used to detect and map ocean plastics?
Introduction:
Scientists have developed a new technique that can map the distribution of plastics in the ocean from space. The results of the study are particularly significant due to the scale and complexity of the problem of plastic pollution in our oceans.
The Problem of Plastic Pollution:
Plastic pollution is a growing environmental concern. It is estimated that eight million tonnes of plastic waste enter the ocean annually, causing harm to marine life, ecosystems, human health, and causing economic damage. Plastic debris can remain in the ocean for hundreds of years and can travel long distances across the globe.
The Technology:
The new technique relies on satellite data to track the concentration of plastics in the world’s oceans. The researchers used a model that analyses ocean currents and sea surface temperature to predict the location of plastic waste. The model was trained using data collected from surveys of plastic debris in the ocean.
Results:
The model was found to be accurate, with a 86% correlation between the predicted locations of plastic waste and actual observations from surveys. The researchers were also able to identify previously unknown regions of high plastic concentrations, particularly in parts of the southern hemisphere.
Conclusion:
The new technique represents a significant step forward in tackling the problem of plastic pollution in our oceans. By mapping the distribution of plastics, policymakers and conservationists will be better equipped to target efforts towards areas that have the highest concentrations of plastic waste. The study is a reminder of the important role that technology can play in addressing environmental challenges. We must continue to innovate and push the boundaries of what is possible in order to protect our planet and its natural resources for future generations.
References:
- https://www.sciencedaily.com/releases/2021/03/210331115503.htm
- https://www.nature.com/articles/s41598-021-86118-w
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