Microplastics (i.e., plastics measuring less than 5mm) pollution is a growing problem affecting coastal communities, marine ecosystems, aquatic life, and human health. The widespread occurrence of marine microplastics, and the need to curb its threats, require expansive, and continuous monitoring. W

This dataset includes surface underway data collected during the racing sailing vessel Malizia Ocean Challenge cruises in the Atlantic Ocean, South Pacific Ocean, Indian Ocean from 2023-02-26 to 2023-05-29. These data include partial pressure of carbon dioxide in the water, sea surface salinity, sea