Data processing procedures for SNOMS project 2007 to 2012. Version-1: 28 August 2012

Abstract

The Swire NOC Monitoring System (SNOMS) has enabled the collection of a global set of surface hydrological and dissolved gas measurements from the MV Pacific Celebes. The data is being used to assess the rate of transfer of carbon dioxide between the atmosphere and the sea in different regions and to assess the forces that control this exchange. During the period from summer 2007 through to summer 2009 the ship crossed the North Atlantic, North Indian and Equatorial Pacific oceans with one voyage via the Cape of Good Hope. From 2009 until March 2012 repeat transects of the Pacific Ocean were made between Australia, New Zealand and North America. Its route has included areas of the World Ocean that are largely under sampled in terms of the carbonate system, the daily sampling of salinity, total alkalinity and dissolved inorganic carbon has provided valuable additional coverage to this data set. The system was a novel design developed to require a minimum of maintenance that was provided by the ship’s crew. This report describes the bespoke processes that were developed in the SNOMS project to assemble and check the quality of the data being returned. The purpose of this report is to provide a complete description of the processing used to move from the raw data collected on the ship to the final archived data set. This document forms part of the meta-data set produced by the SNOMS project, and will be available with the main data set when it is provided to users by BODC and CDIAC.

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