AMT31 Cruise Report

Tilstone, G 2025 AMT31 Cruise Report. Plymouth, PML Publishing, 70pp. (UNSPECIFIED)

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Abstract/Summary

The 31st AMT cruise departed Southampton on the 27th November 2024 and arrived in Montevideo, Uruguay on 30th December 2024. Onboard were teams from Plymouth Marine Laboratory, UK; the University of East Anglia, UK; University of Galway, Ireland; University of Rio Grande, FURG, Brazil; Alfred Wegner Institute, Germany and the University of Connecticut, USA. Operations onboard included the measurement of core AMT variables in the maintenance of a 31 year time series; 30 days of continuous underway Optical and atmospheric observations in support of the European Space Agency Sentinel satellite and the new NASA PACE satellite; Deployment of 12 autonomous argo floats for WHOI and the UK MetOffice; and between 90 and 135 samples taken for the quantification of genetic biodiversity, phytoplankton community structure and ocean acidification parameters. AMT’s oceanography training programme continued with opportunities provided by POGO in the sponsorship of a research fellow from Brazil. The whole of the scientific complement would like to extend their gratitude to Captain John and his officers and crew who supported our activities throughout with dedication and extreme professionalism. Our thanks are also extended to Mark Maltby from NMF. who ensured the delivery of all scientific activities. My particular thanks to Andy Rees and Meryl Hopper who assisted in the pre-cruise logistics. AMT is a multidisciplinary program which undertakes biological, chemical and physical oceanographic research during an annual voyage throughout the Atlantic Ocean. AMT objectives have evolved to enable the maintenance of a continuous set of observations, whilst addressing global issues that are raised throughout the most recent IPCC assessment and UK environmental strategy. AMT objectives are to: (1) quantify the nature and causes of ecological and biogeochemical variability in planktonic ecosystems; (2) quantify the effects of this variability on nutrient cycling, on biogenic export and on air-sea exchange of climate active gases; (3) construct a multi-decadal, multidisciplinary ocean time-series which is integrated within a wider “Pole-to-pole” observatory concept; (4) provide essential sea-truth validation for current and next generation satellite missions; (5) provide essential data for global ecosystem model development and validation and; (6) provide a valuable, highly sought after training arena for the next generation of UK and International oceanographers.

Item Type:	Publication - Report (UNSPECIFIED)
Divisions:	Plymouth Marine Laboratory > National Capability categories > Atlantic Meridional Transect
Depositing User:	Mrs Christina Devereux
Date made live:	14 Mar 2025 17:17
Last Modified:	14 Mar 2025 17:17
URI:	https://plymsea.ac.uk/id/eprint/10389

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