海洋中微塑料如何分布？最新研究称受大小影响或有部分进入碳循环

Core Insights - The research published in the journal "Nature" explores the distribution of microplastics in the ocean at various depths, indicating that the size of microplastics significantly affects their distribution and behavior, with some potentially entering the carbon cycle [1][2] Group 1: Microplastic Distribution - Larger microplastics (100-5000 micrometers) are more likely to be captured by the ocean's stratification, while those smaller than 100 micrometers have a more uniform distribution and longer lifespan in the water column [1] - The study highlights the importance of understanding microplastic distribution for developing effective strategies to mitigate their environmental impact [1] Group 2: Research Methodology - The research utilized depth profile data from 1885 global recording stations collected between 2014 and 2024 to assess the concentration and behavior of microplastics at different depths [1] - The findings indicate that microplastics may constitute a significant component of the ocean's carbon cycle, with their proportion increasing from 0.1% at 30 meters depth to 5% at 2000 meters depth [1] Group 3: Observations in Deep Water - Significant quantities of microplastics were observed in deep water, with over 1100 particles per cubic meter detected at depths of 100-270 meters in the Atlantic, 600 particles per cubic meter at 2000 meters in the North Pacific subtropical gyre, and 13500 particles per cubic meter at 6800 meters in the Mariana Trench [2] - The authors noted that the lack of standardized methods has led to considerable uncertainty, making it challenging to draw clear conclusions and better understand the distribution of microplastics in the ocean [2]