An intercomparison of oceanic methane and nitrous oxide measurements
<p>Large-scale climatic forcing is impacting oceanic biogeochemical cycles and is expected to influence the water-column distribution of trace gases, including methane and nitrous oxide. Our ability as a scientific community to evaluate changes in the water-column inventories of methane an...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2018-10-01
|
| Series: | Biogeosciences |
| Online Access: | https://www.biogeosciences.net/15/5891/2018/bg-15-5891-2018.pdf |
| _version_ | 1818648832037093376 |
|---|---|
| author | S. T. Wilson H. W. Bange D. L. Arévalo-Martínez J. Barnes A. V. Borges I. Brown J. L. Bullister M. Burgos M. Burgos D. W. Capelle M. Casso M. de la Paz M. de la Paz L. Farías L. Fenwick S. Ferrón G. Garcia M. Glockzin D. M. Karl A. Kock S. Laperriere C. S. Law C. S. Law C. C. Manning A. Marriner J.-P. Myllykangas J. W. Pohlman A. P. Rees A. E. Santoro P. D. Tortell R. C. Upstill-Goddard D. P. Wisegarver G.-L. Zhang G. Rehder |
| author_facet | S. T. Wilson H. W. Bange D. L. Arévalo-Martínez J. Barnes A. V. Borges I. Brown J. L. Bullister M. Burgos M. Burgos D. W. Capelle M. Casso M. de la Paz M. de la Paz L. Farías L. Fenwick S. Ferrón G. Garcia M. Glockzin D. M. Karl A. Kock S. Laperriere C. S. Law C. S. Law C. C. Manning A. Marriner J.-P. Myllykangas J. W. Pohlman A. P. Rees A. E. Santoro P. D. Tortell R. C. Upstill-Goddard D. P. Wisegarver G.-L. Zhang G. Rehder |
| author_sort | S. T. Wilson |
| collection | DOAJ |
| description | <p>Large-scale climatic forcing is impacting
oceanic biogeochemical cycles and is expected to influence the water-column
distribution of trace gases, including methane and nitrous oxide. Our ability
as a scientific community to evaluate changes in the water-column inventories
of methane and nitrous oxide depends largely on our capacity to obtain robust
and accurate concentration measurements that can be validated across
different laboratory groups. This study represents the first formal
international intercomparison of oceanic methane and nitrous oxide
measurements whereby participating laboratories received batches of seawater
samples from the subtropical Pacific Ocean and the Baltic Sea. Additionally,
compressed gas standards from the same calibration scale were distributed to
the majority of participating laboratories to improve the analytical accuracy
of the gas measurements. The computations used by each laboratory to derive
the dissolved gas concentrations were also evaluated for inconsistencies
(e.g., pressure and temperature corrections, solubility constants). The
results from the intercomparison and intercalibration provided invaluable
insights into methane and nitrous oxide measurements. It was observed that
analyses of seawater samples with the lowest concentrations of methane and
nitrous oxide had the lowest precisions. In comparison, while the analytical
precision for samples with the highest concentrations of trace gases was
better, the variability between the different laboratories was higher:
36 % for methane and 27 % for nitrous oxide. In addition, the
comparison of different batches of seawater samples with methane and nitrous
oxide concentrations that ranged over an order of magnitude revealed the
ramifications of different calibration procedures for each trace gas.
Finally, this study builds upon the intercomparison results to develop
recommendations for improving oceanic methane and nitrous oxide measurements,
with the aim of precluding future analytical discrepancies between
laboratories.</p> |
| first_indexed | 2024-12-17T01:24:41Z |
| format | Article |
| id | doaj.art-461017df62674175a9349734d0a06a31 |
| institution | Directory Open Access Journal |
| issn | 1726-4170 1726-4189 |
| language | English |
| last_indexed | 2024-12-17T01:24:41Z |
| publishDate | 2018-10-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Biogeosciences |
| spelling | doaj.art-461017df62674175a9349734d0a06a312022-12-21T22:08:42ZengCopernicus PublicationsBiogeosciences1726-41701726-41892018-10-01155891590710.5194/bg-15-5891-2018An intercomparison of oceanic methane and nitrous oxide measurementsS. T. Wilson0H. W. Bange1D. L. Arévalo-Martínez2J. Barnes3A. V. Borges4I. Brown5J. L. Bullister6M. Burgos7M. Burgos8D. W. Capelle9M. Casso10M. de la Paz11M. de la Paz12L. Farías13L. Fenwick14S. Ferrón15G. Garcia16M. Glockzin17D. M. Karl18A. Kock19S. Laperriere20C. S. Law21C. S. Law22C. C. Manning23A. Marriner24J.-P. Myllykangas25J. W. Pohlman26A. P. Rees27A. E. Santoro28P. D. Tortell29R. C. Upstill-Goddard30D. P. Wisegarver31G.-L. Zhang32G. Rehder33University of Hawai'i at Manoa, Daniel K. Inouye Center for Microbial Oceanography: Research and Education (C-MORE), Honolulu, Hawai'i, USAGEOMAR Helmholtz Centre for Ocean Research Kiel, Düsternbrooker Weg 20, 24105 Kiel, GermanyGEOMAR Helmholtz Centre for Ocean Research Kiel, Düsternbrooker Weg 20, 24105 Kiel, GermanyNewcastle University, School of Natural and Environmental Sciences, Newcastle upon Tyne, UKUniversité de Liège, Unité d'Océanographie Chimique, Liège, BelgiumPlymouth Marine Laboratory, Plymouth, UKNational Oceanic and Atmospheric Administration, Pacific Marine Environmental Laboratory, Seattle, Washington, USAUniversity of Hawai'i at Manoa, Daniel K. Inouye Center for Microbial Oceanography: Research and Education (C-MORE), Honolulu, Hawai'i, USAUniversidad de Cádiz, Instituto de Investigaciones Marinas, Departmento Química-Física, Cádiz, SpainUniversity of British Columbia, Department of Earth, Ocean and Atmospheric Sciences, British Columbia, Vancouver, CanadaU.S. Geological Survey, Woods Hole Coastal and Marine Science Center, Woods Hole, USAInstituto de Investigaciones Marinas, Vigo, Spaincurrent address: Instituto Español de Oceanografía, Centro Oceanográfico de A Coruña, A Coruña, SpainUniversity of Concepción, Department of Oceanography and Center for climate research and resilience (CR2), Concepción, ChileUniversity of British Columbia, Department of Earth, Ocean and Atmospheric Sciences, British Columbia, Vancouver, CanadaUniversity of Hawai'i at Manoa, Daniel K. Inouye Center for Microbial Oceanography: Research and Education (C-MORE), Honolulu, Hawai'i, USAUniversity of Concepción, Department of Oceanography and Center for climate research and resilience (CR2), Concepción, ChileLeibniz Institute for Baltic Sea Research Warnemünde, Rostock, GermanyUniversity of Hawai'i at Manoa, Daniel K. Inouye Center for Microbial Oceanography: Research and Education (C-MORE), Honolulu, Hawai'i, USAGEOMAR Helmholtz Centre for Ocean Research Kiel, Düsternbrooker Weg 20, 24105 Kiel, GermanyUniversity of California Santa Barbara, Department of Ecology, Evolution, and Marine Biology, Santa Barbara, USANational Institute of Water and Atmospheric Research (NIWA), Wellington, New ZealandDepartment of Chemistry, University of Otago, Dunedin, New ZealandUniversity of British Columbia, Department of Earth, Ocean and Atmospheric Sciences, British Columbia, Vancouver, CanadaNational Institute of Water and Atmospheric Research (NIWA), Wellington, New ZealandUniversity of Helsinki, Department of Environmental Sciences, Helsinki, FinlandU.S. Geological Survey, Woods Hole Coastal and Marine Science Center, Woods Hole, USAPlymouth Marine Laboratory, Plymouth, UKUniversity of California Santa Barbara, Department of Ecology, Evolution, and Marine Biology, Santa Barbara, USAUniversity of British Columbia, Department of Earth, Ocean and Atmospheric Sciences, British Columbia, Vancouver, CanadaNewcastle University, School of Natural and Environmental Sciences, Newcastle upon Tyne, UKNational Oceanic and Atmospheric Administration, Pacific Marine Environmental Laboratory, Seattle, Washington, USAUniversity of China, Key Laboratory of Marine Chemistry Theory and Technology (MOE), Qingdao, ChinaLeibniz Institute for Baltic Sea Research Warnemünde, Rostock, Germany<p>Large-scale climatic forcing is impacting oceanic biogeochemical cycles and is expected to influence the water-column distribution of trace gases, including methane and nitrous oxide. Our ability as a scientific community to evaluate changes in the water-column inventories of methane and nitrous oxide depends largely on our capacity to obtain robust and accurate concentration measurements that can be validated across different laboratory groups. This study represents the first formal international intercomparison of oceanic methane and nitrous oxide measurements whereby participating laboratories received batches of seawater samples from the subtropical Pacific Ocean and the Baltic Sea. Additionally, compressed gas standards from the same calibration scale were distributed to the majority of participating laboratories to improve the analytical accuracy of the gas measurements. The computations used by each laboratory to derive the dissolved gas concentrations were also evaluated for inconsistencies (e.g., pressure and temperature corrections, solubility constants). The results from the intercomparison and intercalibration provided invaluable insights into methane and nitrous oxide measurements. It was observed that analyses of seawater samples with the lowest concentrations of methane and nitrous oxide had the lowest precisions. In comparison, while the analytical precision for samples with the highest concentrations of trace gases was better, the variability between the different laboratories was higher: 36 % for methane and 27 % for nitrous oxide. In addition, the comparison of different batches of seawater samples with methane and nitrous oxide concentrations that ranged over an order of magnitude revealed the ramifications of different calibration procedures for each trace gas. Finally, this study builds upon the intercomparison results to develop recommendations for improving oceanic methane and nitrous oxide measurements, with the aim of precluding future analytical discrepancies between laboratories.</p>https://www.biogeosciences.net/15/5891/2018/bg-15-5891-2018.pdf |
| spellingShingle | S. T. Wilson H. W. Bange D. L. Arévalo-Martínez J. Barnes A. V. Borges I. Brown J. L. Bullister M. Burgos M. Burgos D. W. Capelle M. Casso M. de la Paz M. de la Paz L. Farías L. Fenwick S. Ferrón G. Garcia M. Glockzin D. M. Karl A. Kock S. Laperriere C. S. Law C. S. Law C. C. Manning A. Marriner J.-P. Myllykangas J. W. Pohlman A. P. Rees A. E. Santoro P. D. Tortell R. C. Upstill-Goddard D. P. Wisegarver G.-L. Zhang G. Rehder An intercomparison of oceanic methane and nitrous oxide measurements Biogeosciences |
| title | An intercomparison of oceanic methane and nitrous oxide measurements |
| title_full | An intercomparison of oceanic methane and nitrous oxide measurements |
| title_fullStr | An intercomparison of oceanic methane and nitrous oxide measurements |
| title_full_unstemmed | An intercomparison of oceanic methane and nitrous oxide measurements |
| title_short | An intercomparison of oceanic methane and nitrous oxide measurements |
| title_sort | intercomparison of oceanic methane and nitrous oxide measurements |
| url | https://www.biogeosciences.net/15/5891/2018/bg-15-5891-2018.pdf |
| work_keys_str_mv | AT stwilson anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT hwbange anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT dlarevalomartinez anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT jbarnes anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT avborges anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT ibrown anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT jlbullister anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT mburgos anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT mburgos anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT dwcapelle anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT mcasso anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT mdelapaz anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT mdelapaz anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT lfarias anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT lfenwick anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT sferron anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT ggarcia anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT mglockzin anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT dmkarl anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT akock anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT slaperriere anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT cslaw anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT cslaw anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT ccmanning anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT amarriner anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT jpmyllykangas anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT jwpohlman anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT aprees anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT aesantoro anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT pdtortell anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT rcupstillgoddard anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT dpwisegarver anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT glzhang anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT grehder anintercomparisonofoceanicmethaneandnitrousoxidemeasurements AT stwilson intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT hwbange intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT dlarevalomartinez intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT jbarnes intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT avborges intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT ibrown intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT jlbullister intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT mburgos intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT mburgos intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT dwcapelle intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT mcasso intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT mdelapaz intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT mdelapaz intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT lfarias intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT lfenwick intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT sferron intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT ggarcia intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT mglockzin intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT dmkarl intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT akock intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT slaperriere intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT cslaw intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT cslaw intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT ccmanning intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT amarriner intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT jpmyllykangas intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT jwpohlman intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT aprees intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT aesantoro intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT pdtortell intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT rcupstillgoddard intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT dpwisegarver intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT glzhang intercomparisonofoceanicmethaneandnitrousoxidemeasurements AT grehder intercomparisonofoceanicmethaneandnitrousoxidemeasurements |