Equilibrator-based measurements of dissolved methane in the surface ocean using an integrated cavity output laser absorption spectrometer

LI Yuhong; ZHAN Liyang; ZHANG Jiexia; CHEN Liqi

doi:10.1007/s13131-015-0685-9

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Article Navigation > Acta Oceanologica Sinica > 2015 > 34(6): 34-41

LI Yuhong, ZHAN Liyang, ZHANG Jiexia, CHEN Liqi. Equilibrator-based measurements of dissolved methane in the surface ocean using an integrated cavity output laser absorption spectrometer[J]. Acta Oceanologica Sinica, 2015, 34(6): 34-41. doi: 10.1007/s13131-015-0685-9

Citation:

LI Yuhong, ZHAN Liyang, ZHANG Jiexia, CHEN Liqi. Equilibrator-based measurements of dissolved methane in the surface ocean using an integrated cavity output laser absorption spectrometer[J]. Acta Oceanologica Sinica, 2015, 34(6): 34-41. doi: 10.1007/s13131-015-0685-9

Citation:

LI Yuhong, ZHAN Liyang, ZHANG Jiexia, CHEN Liqi. Equilibrator-based measurements of dissolved methane in the surface ocean using an integrated cavity output laser absorption spectrometer[J]. Acta Oceanologica Sinica, 2015, 34(6): 34-41. doi: 10.1007/s13131-015-0685-9

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Equilibrator-based measurements of dissolved methane in the surface ocean using an integrated cavity output laser absorption spectrometer

doi: 10.1007/s13131-015-0685-9

Key Laboratory of Global Change and Marine-Atmospheric Chemistry, State Oceanic Administration, Xiamen 361005, China;Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China

Received Date: 2014-05-30
Rev Recd Date: 2014-09-14

Abstract

Abstract

A new off-axis integrated cavity output spectroscopy (ICOS) is coupled to Weiss equilibrator for continuous highresolution dissolved methane measurement in the surface ocean. The time constant for the equilibrator in freshwater at room temperature is determined via dis-equilibration and re-equilibration experiments. The constant for methane is about 40 min. The system is calibrated using a standard gas of 3.980×10-6, and the precision of the ICOS for methane is 0.07%. This system is equipped onboard to measure the spatial distribution in methane concentrations of South Yellow Sea (SYS) along the cruise track from Shanghai to Qingdao. Result shows that the methane concentration varies from 2.79 to 36.36 nmol/L, reveals a significant pattern of methane source in SYS, and a distinct decreasing trend from south to north. The peak value occurs at the coast area outside mouth of the Changjiang River, likely to be affected by the Changjiang diluted water mass dissolving a large amount of rich in methane. Moreover, all the surface waters are oversaturated, air-to-sea fluxes range from 98.59 to 5 485.35 μmol/(m²·d) (average value (1 169.74±1 398.46) μmol/(m²·d)), indicating a source region for methane to the atmosphere.
- methane,
- equilibrator,
- off-axis integrated cavity output spectroscopy (ICOS),
- South Yellow Sea

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References(39)

References

Baer D S, Paul J B, Gupta M, et al. 2002. Sensitive absorption meas-urements in the near-infrared region using off-axis integrated-cavity-output spectroscopy. Appl Phys B, 75(2-3): 261-265

Bange H W. 2006. Nitrous oxide and methane in European coastal waters. Estuar Coast Shelf Sci, 70(3): 361-374

Bates T S, Kelly K C, Johnson J E. 1993. Concentrations and fluxes of dissolved biogenic gases (DMS, CH₄, CO, CO₂) in the equatori-al Pacific during the SAGA 3 experiment. J Geophys Res, 98(D9): 16969-16977

Bates T S, Kelly K C, Johnson J E, et al. 1996. A reevaluation of the open ocean source of methane to the atmosphere. J Geophys Res, 101(D3): 6953-6961

Butler J H, Elkins J W, Brunson C M, et al. 1988. Trace gases in and over the West Pacific and East Indian Oceans during the El Nino-Southern oscillation event of 1987. NOAA, Boulder, CO(USA). Air Resources Lab, 4-32

Butler J H, Elkins J W, Thompson T M, et al. 1989. Tropospheric and dissolved N2O of the West Pacific and East Indian Oceans dur-ing the El Ni.o southern oscillation event of 1987. J Geophys Res, 94(D12): 14865-14877

Cicerone R J, Oremland R S. 1988. Biogeochemical aspects of atmo-spheric methane. Global Biogeochem Cy, 2(4): 299-327

Damm E, Helmke E, Thoms S, et al. 2010. Methane production in aer-obic oligotrophic surface water in the central Arctic Ocean. Biogeosci, 7(3): 1099-1108

Ditchfield A K, Wilson S T, Hart M C, et al. 2012. Identification of pu-tative methylotrophic and hydrogenotrophic methanogens within sedimenting material and copepod faecal pellets. Aqua Micro Eco, 67(2): 151-160

Erickson D J. 1993. A stability dependent theory for air-sea gas ex-change. J Geophys Res: Oceans (1978-2012), 98(C5): 8471-8488

Frankignoulle M, Borges A, Biondo R. 2001. A new design of equilib-rator to monitor carbon dioxide in highly dynamic and turbid environments. Water Res, 35(5): 1344-1347

Grefe I, Kaiser J. 2013. Equilibrator-based measurements of dis-solved nitrous oxide in the surface ocean using an integrated cavity output laser absorption spectrometer. Ocean Sci Dis, 10: 1031-1065

Gu Peipei. 2012. Distribution, fluxes, production and transformation of CH₄ and N2O in representative rivers and estuaries (in Chinese) [dissertation]. Qingdao: Ocean University of China, 1-77

Gülzow W, Rehder G, Schneider B, et al. 2011. A new method for con-tinuous measurement of methane and carbon dioxide in sur-face waters using off-axis integrated cavity output spectroscopy (ICOS): an example from the Baltic Sea. Limnol Oceanogr Meth, 9(5): 176-184

Hendriks D M D, Dolman A J, Van Der Molen M K, et al. 2008. A com-pact and stable eddy covariance set-up for methane measure-ments using off-axis integrated cavity output spectroscopy. At-mos Chem Phys, 8(2): 431-443

Houghton J T, Ding Y, Griggs D J, et al. 2001. Climate Change 2001: The scientific basis: contribution of working group I to the third assessment report of the intergovernmental panel on climate change. Cambridge: Cambridge University Press Hur H B, Jacobs G A, Teague W J. 1999. Monthly variations of water masses in the Yellow and East China Seas, November 6, 1998. J Phys Oceanogr, 55(2): 171-184

IPCC. 2007. Climate Change 2007: the Physical Science Basis. Contri-bution of Working Group I to the Fourth Assessment Report of the IPCC. Cambridge: Cambridge University Press Johnson J E. 1999. Evaluation of a seawater equilibrator for ship-board analysis of dissolved oceanic trace gases. Anal Chem Acta, 395(1-2): 119-132

Karl D M, Beversdorf L, Bj.rkman K M, et al. 2008. Aerobic produc-tion of methane in the sea. Nat Geo, 1(7): 473-478

Keir R S, Greinert J, Rhein M, et al. 2005. Methane and methane car-bon isotope ratios in the Northeast Atlantic including the Mid-Atlantic Ridge (50°N). Deep-Sea Res Pt I: Oceanographic Re-search Papers, 52(6) 1043-1070

Lammers S, Suess E. 1994. An improved head-space analysis method for methane in seawater. Mar Chem, 47(2): 115-125

Liss P S, Merlivat L. 1986. Air-sea gas exchange rates: Introduction and synthesis. The Role of Air-Sea Exchange in Geochemical Cycling, 185: 113-127

Liu Shuxun, Shen Xinqiang, Wang Youqin, et al. 1992. Preliminary analysis of distribution and variation of perennialmonthly mean water masses in the Bohai Sea, the Huanghai Sea and the East China Sea. Acta Oceanol Sin, 11(4): 483-498

Reeburgh W S. 2007. Oceanic methane biogeochemistry. Chem Rev, 107(2): 486-513

Rehder G, Suess E. 2001. Methane and pCO₂ in the Kuroshio and the South China Sea during maximum summer surface temperat-ures. Mar Chem, 75(1-2): 89-108

Schmitt M, Faber E, Botz R, et al. 1991. Extraction of methane from seawater using ultrasonic vacuum degassing. Anal Chem, 63(5): 529-532

Schneider B, Kremling K, Duinker J C. 1992. CO₂ partial pressure in Northeast Atlantic and adjacent shelf waters: Processes and seasonal variability. J Marine Syst, 3(6): 453-463

Schneider B, Sadkowiak B, Wachholz F. 2007. A new method for con-tinuous measurements of O2 in surface water in combination with pCO₂ measurements: implications for gas phase equilibra-tion. Mar Chem, 103(1-2): 163-171

Smethie W M Jr, Takahashi T, Chipman D W, et al. 1985. Gas ex-change and CO₂ flux in the tropical Atlantic Ocean determined from 222Rn and pCO₂ measurements. J Geophy Res: Oceans (1978-2012), 90(C4): 7005-7022

Swinnerton J W, Linnenbom V J, Cheek C H. 1962. Determination of dissolved gases in aqueous solutions by gas chromatography. Anal Chem, 34(4): 483-485

Takahashi T, Sutherland S C, Wanninkhof R, et al. 2009. Climatolo-gical mean and decadal change in surface ocean pCO₂, and net sea-air CO₂ flux over the global oceans. Deep-Sea Res Pt II: Topical Studies in Oceanography, 56(8-10): 554-577

Tilbrook B D, Karl D M. 1994. Dissolved methane distributions, sources, and sinks in the western Bransfield Strait, Antarctica. J Geophy Res, 99(C8): 16383-16393

Wanninkhof R. 1992. Relationship between wind speed and gas ex-change over the ocean. J Geophy Res: Oceans (1978-2012), 97(C5): 7373-7382

Weiss R F. 1981. Determinations of carbon dioxide and methane by dual catalyst flame ionization chromatography and nitrous ox-ide by electron capture chromatography. J Chromatogr Sci, 19(12): 611-616

Weller D I, Law C S, Marriner A, et al. 2013. Temporal variation of dis-solved methane in a subtropical mesoscale eddy during a phytoplankton bloom in the southwest Pacific Ocean. Prog Oceanogr, 116: 193-206

Wiesenburg D A, Guinasso N L Jr. 1979. Equilibrium solubilities of methane, carbon monoxide, and hydrogen in water and sea water. J Chem Eng Data, 24(4): 356-360

Zhang Guiling, Zhang Jing, Kang Yubao, et al. 2004. Distributions and fluxes of methane in the East China Sea and the Yellow Sea in spring. J Geophys Res, 109(C7): 101-111

Zhang Guiling, Zhang Jing, Liu Sumei, et al. 2008a. Methane in the Changjiang (Yangtze River) Estuary and its adjacent marine area: riverine input, sediment release and atmospheric fluxes. Biogeochem, 91(1): 71-84

Zhang Guiling, Zhang Jing, Ren Jingling, et al. 2008b. Distributions and sea-to-air fluxes of methane and nitrous oxide in the North East China Sea in summer. Mar Chem, 110(1-2): 42-55

Zhao Yuchuan. 2011. Distributions and fluxes of methane and ni-trous oxide in the Changjiang (Yangtze River) and its Estuary (in Chinese) [dissertation]. Qingdao: Ocean University of China, 1-93

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