Developments in marine pCO2 measurement technology; towards sustained in situ observations

被引：36

作者：

Clarke, Jennifer S. ^{[1
,2
]}

Achterberg, Eric P. ^{[1
,2
]}

Connelly, Douglas P. ^{[3
]}

Schuster, Ute ^{[4
]}

Mowlem, Matthew ^{[3
]}

机构：

[1] Univ Southampton, Natl Oceanog Ctr Southampton, Ocean & Earth Sci, Southampton S014 3ZH, Hants, England

[2] GEOMAR Helmholtz Ctr Ocean Res, Wischhofstr 1-3, D-24148 Kiel, Germany

[3] Natl Oceanog Ctr, Waterfront Campus,European Way, Southampton S014 3ZH, Hants, England

[4] Univ Exeter, North Pk Rd, Exeter EX4 4QE, Devon, England

来源：

TRAC-TRENDS IN ANALYTICAL CHEMISTRY | 2017年 / 88卷

基金：

英国自然环境研究理事会;

关键词：

pCO(2); Sensors; Seawater; In situ observations; Optodes; CAVITY RINGDOWN SPECTROSCOPY; CARBON-DIOXIDE; OCEAN-ACIDIFICATION; OPTICAL SENSOR; PARTIAL-PRESSURE; HIGH-RESOLUTION; CO2; PH; INSTRUMENTS; SYSTEM;

D O I：

10.1016/j.trac.2016.12.008

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The oceanic uptake of anthropogenic CO2 causes pronounced changes to the marine carbonate system. High quality pCO(2) measurements with good temporal and spatial coverage are required to monitor the oceanic uptake, identify regions with pronounced carbonate system changes, and observe the effectiveness of CO2 emission mitigation strategies. There are currently several instruments available, but many are unsuitable for autonomous deployments on in situ platforms such as gliders, moorings and Argo floats. We assess currently available technology on its suitability for in situ deployment, with a focus on optode technology developments. Optodes for pCO(2) measurements provide a promising new technological approach, and were successfully calibrated over the range of 280-480 mu atm applying modified time-domain dual lifetime referencing. A laboratory precision of 0.8 mu atm (n = 10) and a response time (tau(90)) of 165 s were achieved, and with further development pCO(2) optodes may become as widely used as their oxygen counterparts. (C) 2017 The Authors. Published by Elsevier B.V.

引用

页码：53 / 61

页数：9

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