RAPID report for research expedition DY146. 4 February – 9 March 2022, RRS Discovery. Research Expedition Report No. 76

Evans, D. Gwyn ORCID: https://orcid.org/0000-0002-6328-4093. 2022 RAPID report for research expedition DY146. 4 February – 9 March 2022, RRS Discovery. Research Expedition Report No. 76. Southampton, National Oceanography Centre, 158pp. (National Oceanography Centre Cruise Report, 76)

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Abstract/Summary

The purpose of RRS Discovery research expedition DY146 was to refurbish the eastern boundary portion of the RAPID 26°N array of moorings that span the Atlantic from the Bahamas to the Canary Islands. The expedition started in Southampton on 4 February 2022 and ended on 9 March 2022 in Southampton, UK. The moorings are part of a purposeful Atlantic wide array that observes the Atlantic Meridional Overturning Circulation and the associated heat and freshwater transports. The RAPIDMOCHA-WBTS array is a joint UK- US programme. During DY146 moorings were removed at sites: EB1, EBHi and EBH4. Moorings were serviced at sites: EBH1, EBH2 and EBH3. Moorings were equipped with instruments to measure temperature, conductivity and pressure, and a number of moorings were also equipped with current meters and/or biogeochemical sensors, including oxygen, carbon and nutrient sensors. CTD stations were conducted throughout the cruise for purposes of providing pre- and post-deployment calibrations for mooring instrumentation (including oxygen and carbonate chemistry sampling). Shipboard underway measurements were systematically logged, processed and calibrated, including: surface meteorology, 5m depth sea temperatures and salinities, water depth, and navigation. Water velocity profiles from 15 m to approximately 800 m depth were obtained using two vessel mounted Acoustic Doppler Current Profilers (one 75 kHz and one 150 kHz).

Item Type:	Publication - Report
Funders/Sponsors:	National Oceanography Centre
Date made live:	05 May 2022 14:40 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/532586

Item Type:

Publication - Report

Funders/Sponsors:

National Oceanography Centre

Date made live:

05 May 2022 14:40 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/532586