Science Advances

Supplementary Materials

The PDF file includes:

  • Fig. S1. Length frequency (%) of microfibers found in Arctic and European snow.
  • Note S1. Calculation of propagation of uncertainty of results regarding possible contamination.
  • Table S1. Concentration of MPs, fibers polymer types, and other particles detected in snow samples.

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Other Supplementary Material for this manuscript includes the following:

  • Table S2 (Microsoft Excel format). Concentration of MPs, fibers, polymer types, and other particles detected in snow samples as well as size frequency distribution and metadata.
  • Table S3 (Microsoft Excel format). Number, size, and color of fibers measured in Arctic and European snow samples.
  • Table S4 (Microsoft Excel format). Concentration, composition, and size of MPs detected in blank samples.

Files in this Data Supplement: