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A New Method for Continuous Measurements of Oceanic and Atmospheric N2O, Co and Co2: Performance of Off-axis Integrated Cavity Output Spectroscopy (Oa-icos) Coupled to Non-dispersive Infrared Detection (Ndir) : Volume 9, Issue 6 (11/12/2013)

By Arévalo-martínez, D. L.

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Book Id: WPLBN0004020631
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File Size: Pages 17
Reproduction Date: 2015

Title: A New Method for Continuous Measurements of Oceanic and Atmospheric N2O, Co and Co2: Performance of Off-axis Integrated Cavity Output Spectroscopy (Oa-icos) Coupled to Non-dispersive Infrared Detection (Ndir) : Volume 9, Issue 6 (11/12/2013)  
Author: Arévalo-martínez, D. L.
Volume: Vol. 9, Issue 6
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Arévalo-Martínez, D. L., Kock, A., Körtzinger, A., Piller, I., Bange, H. W., Steinhoff, T.,...Krumbholz, M. (2013). A New Method for Continuous Measurements of Oceanic and Atmospheric N2O, Co and Co2: Performance of Off-axis Integrated Cavity Output Spectroscopy (Oa-icos) Coupled to Non-dispersive Infrared Detection (Ndir) : Volume 9, Issue 6 (11/12/2013). Retrieved from

Description: Helmholtz Centre for Ocean Research Kiel (GEOMAR), Düsternbrooker Weg 20 24105 Kiel, Germany. A new system for continuous, highly resolved oceanic and atmospheric measurements of N2O, CO and CO2 is described. The system is based upon off-axis integrated cavity output spectroscopy (OA-ICOS) and a non-dispersive infrared analyzer (NDIR), both coupled to a Weiss-type equilibrator. Performance of the combined setup was evaluated by testing its precision, accuracy, long-term stability, linearity and response time. Furthermore, the setup was tested during two oceanographic campaigns in the equatorial Atlantic Ocean in order to explore its potential for autonomous deployment onboard voluntary observing ships (VOS). Improved equilibrator response times for N2O (2.5 min) and CO (45 min) were achieved in comparison to response times from similar chamber designs used by previous studies. High stability of the OA-ICOS analyzer was demonstrated by low optimal integration times of 2 and 4 min for N2O and CO respectively, as well as detection limits of < 40 ppt and precision better than 0.3 ppb Hz–1/2. Results from a direct comparison of the method presented here and well-established discrete methods for oceanic N2O and CO2 measurements showed very good consistency. The favorable agreement between underway atmospheric N2O, CO and CO2 measurements and monthly means at Ascension Island (7.96° S 14.4° W) further suggests a reliable operation of the underway setup in the field. The potential of the system as an improved platform for measurements of trace gases was explored by using continuous N2O and CO2 data to characterize the development of the seasonal equatorial upwelling in the Atlantic Ocean during two R/V Maria S. Merian cruises. A similar record of high-resolution CO measurements was simultaneously obtained, offering, for the first time, the possibility of a comprehensive view of the distribution and emissions of these climate-relevant gases in the area studied. The relatively simple underway N2O/CO/CO2 setup is suitable for long-term deployment onboard research and commercial vessels although potential sources of drift, such as cavity temperature, and further technical improvements towards automation, still need to be addressed.

A new method for continuous measurements of oceanic and atmospheric N2O, CO and CO2: performance of off-axis integrated cavity output spectroscopy (OA-ICOS) coupled to non-dispersive infrared detection (NDIR)

Allan, D. W.: Statistics of atomic frequency standards, Proc. IEEE, 54, 221–230, 1966.; Andrié, C., Oudot, C., Genthon, C, and Merlivat, L.: CO2 fluxes in the tropical Atlantic during FOCAL cruises, J. Geophys. Res., 21, 11741–11755, 1986.; Baer, D. S., Paul, J. B., Gupta, M., and O'keefe, A.: Sensitive absorption measurements in the near-infrared region using off-axis integrated-cavity output spectroscopy, Appl. Phys. B., 75, 261–265, 2002.; Bakker, D. C. E., de Baar, H. J. W., and de Jong, E.: Dissolved carbon dioxide in tropical east Atlantic surface waters, Phys. Chem. Earth, 24, 399–404, 1999.; Bange, H. W., Rapsomanikis, S., and Andreae, M. O.: Nitrous oxide in coastal waters, Global Biogeochem. Cy., 10, 197–207, 1996a.; Bange, H. W., Rapsomanikis, S., and Andreae, M. O.: The Aegean Sea as a source of atmospheric nitrous oxide and methane, Mar. Chem., 53, 41–49, 1996b.; Bange, H. W., Rapsomanikis, S., and Andreae, M. O.: Nitrous oxide cycling in the Arabian Sea, J. Geophys. Res., 106, 1053–1065, 2001.; Bates, T. S., Kelly, K. C., and Johnson, J. E.: Concentrations and fluxes of dissolved biogenic gases (DMS, CH4, CO, CO2) in the equatorial Pacific during the SAGA 3 experiment, J. Geophys. Res., 98, 16969–16977, 1993.; Dyroff, C.: Optimum signal-to-noise ratio in off-axis integrated cavity output spectroscopy, Opt. Lett., 36, 1110–1112, 2011.; Bates, T. S., Kelly, K. C., Johnson, J. E., and Gammon, R. H.: Regional and seasonal variations in the flux of oceanic carbon monoxide to the atmosphere, J. Geophys. Res., 100, 23093–23101, 1995.; Battino, R.: The Ostwald coefficient of gas solubility, Fluid Phase Equilibr., 15, 231–240, 1984.; Becker, M., Andersen, N., Fiedler, B., Fietzek, P., Körtzinger, A., Steinhoff, T., and Friedrichs, G.: Using cavity ringdown spectroscopy for continuous monitoring of δ13C(CO2) and fCO2 in the surface ocean, Limnol. Oceanogr. Methods, 10, 752–766, 2012.; Burch, D. E., Singleton, E. B., and Williams, D.: Absorption line broadening in the infrared, Appl. Optics, 1, 359–363, 1962.; Butler, J. H., Elkins, J. W., Brunson, C. H., Egan, K. B., Thompson, T. M., Conway, T. J., and Hall, B. D.: Trace gases in and over the West Pacific and East Indian Oceans during the E1 Niño-Southern Oscillation event of 1987, Data Rep. ERL ARL-16, Air Resour. Lab., Natl. Oceanic and Atmos. Admin., Silver Spring, Maryland, 104 pp., 1988.; Conrad, R., Seiler, W., Bunse, G., and Giehl, H.: Carbon monoxide in seawater (Atlantic Ocean), J. Geophys. Res., 87, 8839–8852, 1982.; Conway, T. J., Lang, P. M., and Masarie, K. A.: Atmospheric carbon dioxide dry air mole fractions from the NOAA ESRL Carbon Cycle Cooperative Global Air Sampling Network, 1968–2011, last access: May 2013, version: 15.08.2012, 2012.; Day, D. A. and Faloona, I.: Carbon monoxide and chromophoric dissolved organic matter cycles in the shelf waters of the northern California upwelling system, J. Geophys. Res., 114, C01006, doi:10.1029/2007JC004590, 2009.; Dickson, A. G., Sabine, C. L., and Christian, J. R.: Guide to best practices for ocean CO2 measurements, PICES Special Publication, 3, 191 pp., 2007.; Denman, K. L., Brasseur, G., Chidthaisong, A., Ciais, P., Cox, P. M., Dickinson, R. E., Hauglustaine, D., Heinze, C., Holland, E., Jacob, D., Lohmann, U., Ramachandran, S., da Silva Dias, P. L., Wofsky, S. C., and Zhang, X.: Couplings between changes in the climate system and biogeochemistry, in: Climate change 2007, the physical science basis, contribution of working group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Solomon, S., Qin, D., Manning, M., Che


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