1,721,058 research outputs found
DEFRApH - Sample collection and handling procedures
Full text linkAll chemical and biogeochemical process in the sea are affected by the acidity of the water. Acidity is therefore fundamental property of seawater. The growing concern that the acidity of the oceans might be increasing has revealed weaknesses in our knowledge of this fundamental property and its variation in space and time. In 2008 the DEFRApH project (DEFRA contract ME4133) was initiated to provide this missing information in UK related waters. It required sampling for and analysis of the total inorganic carbon and total alkalinity content of samples. This reports documents the procedures sued for sampling. A companion document Hartman Dumousseaud and Roberts (NOC Internal Document No. 01) describes in detail the analytical procedures used and the calculation of the results
Data processing procedures for SNOMS project 2007 to 2012. Version-1: 28 August 2012
Full text linkThe 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
Report on the maintenance of precision and accuracy of measurements of dissolved nutrients - silicate and nitrate - over 40 days of measurements on WOCE Leg A8, FS "Meteor" Cruise 28/1, 29 March to 11 May 1994
Full text linkA manual of methods for the continuous flow determination of ammonia, nitrate-nitrite, phosphate and silicate in seawater
Full text linkRRS Discovery Cruise 160A, 28 July - 9 August 1986. Geochemical studies in the English Channel
Full text linkRRS Challenger Cruise 39, 1-13 November 1988. NERC North Sea Community Research Project Survey Cruise No. 4
Full text linkFirst Annual Report on the SNOMS Project
Full text linkIn 2006 the Swire Group Charitable Trust funded the development and installation of a system to measure the partial pressure of carbon dioxide dissolved in the surface ocean from one of the Swire Group’s ships. The system was fitted on the MV Pacific Celebes in June 2007. The Celebes trades on a global route out of Singapore. It takes about 5 months to go round the world. Measurements are made of the partial pressure of carbon dioxide in seawater and air, also of water temperature, salinity, dissolved oxygen and nitrogen, air temperature, pressure and humidity. Data are collected automatically on the ship and then transmitted to shore where they are transferred to a public web page. The data are vital to enabling the prediction of change in the ocean’s ability to absorb carbon dioxide and hence the rate of climate change induced by anthropogenic release of carbon dioxide. Key observations to date are: (1) potentially high inputs of gasses into the ocean during sustained storm conditions, (2) a substantial natural flux of carbon dioxide into the atmosphere of the western equatorial Pacific under the ‘La Nina’ conditions of 2007, (3) the potential of the western North Atlantic to absorb more carbon dioxide in autumn than previously predicted
Preliminary studies of the effects of oxidative and reductive leaches on the ion exchange behaviour of marine sediments
Full text linkRRS Challenger Cruise 43, 30 December 1988 - 12 January 1989. NERC North Sea Community Research Project Survey Cruise No. 6
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