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减少二甲基硫化物和增加聚甲:微塑料污染在酸化海洋中的潜在气候影响

Qian-Yao Ma^1,2, Ya-Wen Zou³, Jun-Qi Yang¹

¹Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China.

Environmental science & technology

|June 12, 2025

概括

海洋微塑料 (MP) 污染和海洋酸化 (OA) 减少了像DMS这样的气候冷却气体. 联合MP和OA污染可能会通过改变海洋生物性气体循环而加剧全球变暖.

科学领域:

海洋化学和气候科学
生物地质化学循环生物地质化学循环
环境污染的影响环境污染.

背景情况:

微塑料 (MP) 污染和海洋酸化 (OA) 是重要的海洋环境问题.
对于MP和OA对气候活性气体的联合影响尚不清楚.
像二甲基硫化物 (DMS),形式 (CHBr3) 和二甲 (CH2Br2) 这样的生物气体在气候调节中起着至关重要的作用.

研究的目的:

调查MP污染和OA对DMS,CHBr3和CH2Br2.2生产的综合影响.
评估这些气体生产变化如何影响海洋气候反机制.
了解在综合污染情景下对未来全球变暖的影响.

主要方法:

一个基于船舶的微观宇宙实验,模拟现场条件.
控制引入OA和MP污染.
测量DMS,CHBr3和CH2Br2度和生产速度.

主要成果:

MP和OA都抑制了植物浮游生物的生长和DMS的产生.
澳大利亚石油公司进一步降低了DMS的生产速度和产量.
添加MP增加了溶解的有机物,OA增强了氧化酶活性,促进了CHBr3和CH2Br2的产生.
联合OA和MP导致DMS下降61%,CHBr3增加132%,CH2Br2.4增加45%.

结论:

在OA条件下的MP污染可能会破坏海洋生物性气体循环.
减少DMS可能会削弱其气候冷却效应,而增加CHBr3和CH2Br2可能会对大气产生其他影响.
这种相互作用可能会通过改变未来酸化海洋的气候活性气体生产来加剧全球变暖.

关键词:

生物地化学循环的生物地化学循环.形是一种形.气候变化气候变化气候变化甲基二硫化二甲基硫化物印度洋东部印度洋东部微塑料微塑料的使用海洋酸化是指海洋的酸化.

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