<strong>A multilevel dataset of microplastic abundance in the world’s upper ocean </strong>

Atsuhiko Isobe

Presentation information

[J] Oral

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS19] Ocean Plastics, an earth science perspective

Sun. May 22, 2022 9:00 AM - 10:30 AM 106 (International Conference Hall, Makuhari Messe)

convener:Atsuhiko Isobe(Kyushu University), convener:Kiichiro Kawamura(Yamaguchi University), Yusuke Okazaki(Department of Earth and Planetary Sciences, Graduate School of Science, Kyushu University), convener:Masashi Tsuchiya(Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology), Chairperson:Atsuhiko Isobe(Kyushu University), Kiichiro Kawamura(Yamaguchi University)

9:00 AM - 9:25 AM

[MIS19-01] A multilevel dataset of microplastic abundance in the world’s upper ocean

★Invited Papers

*Atsuhiko Isobe¹ (1.Kyushu University)

Keywords:microplastic abundance, 2D maps

A total of 8,218 pelagic microplastic samples from the world’s oceans were synthesized to create a dataset composed of raw, calibrated, processed, and gridded data which are made available to the public. The raw microplastic abundance data were obtained by different research projects using surface net tows or continuous seawater intake. Fibrous microplastics were removed from the calibrated dataset. Microplastic abundance which fluctuates due to vertical mixing under different oceanic conditions was standardized. An optimum interpolation method was used to create the gridded data; in total, there were 24.4 trillion pieces (8.2 × 10⁴~57.8 × 10⁴ tons) of microplastics in the world’s upper oceans.