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RRS Discovery Cruise 233, 23 Apr-01 Jun 1998. A Chemical and Hydrographic Atlantic Ocean Survey: CHAOS

RRS Discovery Cruise 233, 23 Apr-01 Jun 1998. A Chemical and Hydrographic Atlantic Ocean Survey: CHAOS
RRS Discovery Cruise 233, 23 Apr-01 Jun 1998. A Chemical and Hydrographic Atlantic Ocean Survey: CHAOS
RRS Discovery Cruise 233, CHAOS (Chemical and Hydrographic Atlantic Ocean Survey) combined a long meridional section notionally along 20°W from 20°N to Iceland with a detailed survey of the Rockall Trough. The meridional section was designed to i) establish the sources and sinks of halocarbons in subtropical and subpolar waters during spring bloom conditions; ii) to examine the decadal scale variability in the eastern Atlantic over the last 40 years by repeating the northern part of the WOCE A16 line first occupied in 1988 and again in 1993 (NATL 93), and parts of other sections occupied in 1957, 1973, 1983 and 1991; iii). to study the spreading, mixing and ventilation rates of Labrador Sea Water, Mediterranean Water, and waters of Southern Ocean origin (Antarctic Intermediate Water and Antarctic Bottom Water) which extend into the northeast Atlantic. The detailed survey of the Rockall Trough comprised 4 zonal sections notionally at 57°N, 56°N, 54°N and 52°N in order to i) make a detailed study of the water masses in the Rockall Trough with particular emphasis on their circulation/recirculation patterns ii) to re-occupy stations along the Ellett line (57°N) to continue the time series dating from 1975. The sections were completed with CTD, LADCP, tracer chemistry (CFCs, nutrients, oxygen), alkalinity and pH measurements to full depth and a suite of halocarbon measurements together with sampling for plant pigments and biological species to 200m. Continuous measurements of atmospheric halocarbons, pCO2, meteorological measurements, VM -ADCP, depth, TSG, radiometer SST and navigation data were also made. All measurements were made to WOCE standards and the final data submitted to the WOCE programme.
ADCP, alkalinity, ATLNE, atmospheric halocarbons, biology, CFC, CHAOS, CO2, cruise 233 1998, Discovery, halocarbons, Iceland Waters, LADCP, meteorological data, meteorological measurements, Northeast Atlantic, nutrients, oxygen, pH, plant pigments, Rockall Trough, SISTeR, tracer chemistry, tracers, WOCE
24
Southampton Oceanography Centre Cruise Report
Smythe-Wright, D.
18f22519-f0f3-4144-ad0d-051fd3374fe8
Smythe-Wright, D.
18f22519-f0f3-4144-ad0d-051fd3374fe8

Smythe-Wright, D. (1999) RRS Discovery Cruise 233, 23 Apr-01 Jun 1998. A Chemical and Hydrographic Atlantic Ocean Survey: CHAOS (Southampton Oceanography Centre Cruise Report, 24) Southampton, UK. Southampton Oceanography Centre Cruise Report 86pp.

Record type: Monograph (Project Report)

Abstract

RRS Discovery Cruise 233, CHAOS (Chemical and Hydrographic Atlantic Ocean Survey) combined a long meridional section notionally along 20°W from 20°N to Iceland with a detailed survey of the Rockall Trough. The meridional section was designed to i) establish the sources and sinks of halocarbons in subtropical and subpolar waters during spring bloom conditions; ii) to examine the decadal scale variability in the eastern Atlantic over the last 40 years by repeating the northern part of the WOCE A16 line first occupied in 1988 and again in 1993 (NATL 93), and parts of other sections occupied in 1957, 1973, 1983 and 1991; iii). to study the spreading, mixing and ventilation rates of Labrador Sea Water, Mediterranean Water, and waters of Southern Ocean origin (Antarctic Intermediate Water and Antarctic Bottom Water) which extend into the northeast Atlantic. The detailed survey of the Rockall Trough comprised 4 zonal sections notionally at 57°N, 56°N, 54°N and 52°N in order to i) make a detailed study of the water masses in the Rockall Trough with particular emphasis on their circulation/recirculation patterns ii) to re-occupy stations along the Ellett line (57°N) to continue the time series dating from 1975. The sections were completed with CTD, LADCP, tracer chemistry (CFCs, nutrients, oxygen), alkalinity and pH measurements to full depth and a suite of halocarbon measurements together with sampling for plant pigments and biological species to 200m. Continuous measurements of atmospheric halocarbons, pCO2, meteorological measurements, VM -ADCP, depth, TSG, radiometer SST and navigation data were also made. All measurements were made to WOCE standards and the final data submitted to the WOCE programme.

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Published date: 1999
Keywords: ADCP, alkalinity, ATLNE, atmospheric halocarbons, biology, CFC, CHAOS, CO2, cruise 233 1998, Discovery, halocarbons, Iceland Waters, LADCP, meteorological data, meteorological measurements, Northeast Atlantic, nutrients, oxygen, pH, plant pigments, Rockall Trough, SISTeR, tracer chemistry, tracers, WOCE

Identifiers

Local EPrints ID: 299
URI: http://eprints.soton.ac.uk/id/eprint/299
PURE UUID: 9737f1b5-f350-455b-ad49-e7479fef119a

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Date deposited: 27 Jan 2004
Last modified: 09 Jan 2022 04:55

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Contributors

Author: D. Smythe-Wright

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