Plastic rain in protected areas of the United States

doi:10.1126/science.aaz5819

GSTDTAP > 气候变化

DOI	10.1126/science.aaz5819
	Plastic rain in protected areas of the United States
	Janice Brahney; Margaret Hallerud; Eric Heim; Maura Hahnenberger; Suja Sukumaran
	2020-06-12
发表期刊	Science
出版年	2020
英文摘要	No place is safe from plastic pollution. Brahney et al. show that even the most isolated areas in the United States—national parks and national wilderness areas—accumulate microplastic particles after they are transported there by wind and rain (see the Perspective by Rochman and Hoellein). They estimate that more than 1000 metric tons per year fall within south and central western U.S. protected areas. Most of these plastic particles are synthetic microfibers used for making clothing. These findings should underline the importance of reducing pollution from such materials. Science , this issue p. [1257][1]; see also p. [1184][2] Eleven billion metric tons of plastic are projected to accumulate in the environment by 2025. Because plastics are persistent, they fragment into pieces that are susceptible to wind entrainment. Using high-resolution spatial and temporal data, we tested whether plastics deposited in wet versus dry conditions have distinct atmospheric life histories. Further, we report on the rates and sources of deposition to remote U.S. conservation areas. We show that urban centers and resuspension from soils or water are principal sources for wet-deposited plastics. By contrast, plastics deposited under dry conditions were smaller in size, and the rates of deposition were related to indices that suggest longer-range or global transport. Deposition rates averaged 132 plastics per square meter per day, which amounts to >1000 metric tons of plastic deposition to western U.S. protected lands annually. [1]: /lookup/doi/10.1126/science.aaz5819 [2]: /lookup/doi/10.1126/science.abc4428
领域	气候变化 ; 资源环境
URL	查看原文
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/274473
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Janice Brahney,Margaret Hallerud,Eric Heim,et al. Plastic rain in protected areas of the United States[J]. Science,2020.
APA	Janice Brahney,Margaret Hallerud,Eric Heim,Maura Hahnenberger,&Suja Sukumaran.(2020).Plastic rain in protected areas of the United States.Science.
MLA	Janice Brahney,et al."Plastic rain in protected areas of the United States".Science (2020).