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T1 Guidelines for the Monitoring and Assessment of Plastic Litter in the Ocean - GESAMP Reports and Studies No. 99
A1 Joint Group of Experts on the Scientific Aspects of Marine Pollution, 
A2 Kershaw, Peter
A2 Turra, Alexander
A2 Galgani, Francois
K1 plastic waste
K1 marine pollution
K1 microplastic
K1 environmental indicator
K1 survey
K1 citizen science
PB United Nations Environment Programme
YR 2019
FD 2019
LK https://wedocs.unep.org/handle/20.500.11822/30009
UL https://wedocs.unep.org/handle/20.500.11822/30009
NO The principal purpose of this report is to provide recommendations, advice and practical guidance, for establishing programmes to monitor and assess the distribution and abundance of plastic1 litter, also referred to as plastic debris, in the ocean. It is a product of the GESAMP Working Group (WG40) on ‘Sources, fate and effects of plastics and microplastics in the marine environment’2, co-led bythe Intergovernmental Commission on Oceanography (IOC-UNESCO) and the United Nations Environment Programme (UNEP). The term ‘plastic litter’ is used throughout, but is synonymous with ‘plastic debris’. In some cases the report refers to monitoring strategies and sampling protocols that have been designed for the monitoring of all forms of marine litter (i.e. processed wood, metal, textiles, glass, munitions, and plastics).
DS UN Environment Document Repository
RD Sep 24, 2026