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Numerical tools to estimate the flux of a gas across the air-water interface and assess the heterogeneity of its forcing functions

2013Journal article Open access
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dc.contributor.authorVieira, V. M. N. C. S.
dc.contributor.authorMartins, Flávio
dc.contributor.authorSilva, João
dc.contributor.authorSantos, Rui
dc.date.accessioned2018-12-07T14:58:30Z
dc.date.available2018-12-07T14:58:30Z
dc.date.issued2013
dc.description.abstractA numerical tool was developed for the estimation of gas fluxes across the air-water interface. The primary objective is to use it to estimate CO2 fluxes. Nevertheless application to other gases is easily accomplished by changing the values of the parameters related to the physical properties of the gases. A user-friendly software was developed allowing to build upon a standard kernel a custom-made gas flux model with the preferred parameterizations. These include single or double layer models; several numerical schemes for the effects of wind in the air-side and water-side transfer velocities; the effects of atmospheric stability, surface roughness and turbulence from current drag with the bottom; and the effects on solubility of water temperature, salinity, air temperature and pressure. An analysis was also developed which decomposes the difference between the fluxes in a reference situation and in alternative situations into its several forcing functions. This analysis relies on the Taylor expansion of the gas flux model, requiring the numerical estimation of partial derivatives by a multivariate version of the collocation polynomial. Both the flux model and the difference decomposition analysis were tested with data taken from surveys done in the lagoon system of Ria Formosa, south Portugal, in which the CO2 fluxes were estimated using the infrared gas analyzer (IRGA) and floating chamber method, whereas the CO2 concentrations were estimated using the IRGA and degasification chamber. Observations and estimations show a remarkable fit.
dc.identifier.doi10.5194/os-9-355-2013
dc.identifier.issn1812-0784
dc.identifier.urihttp://hdl.handle.net/10400.1/12054
dc.language.isoeng
dc.peerreviewedyes
dc.publisherCopernicus Gesellschaft Mbh
dc.subjectAtmospheric Surface-Layer
dc.subjectCarbon-Dioxide
dc.subjectWind Stress
dc.subjectTransfer Velocity
dc.subjectDiffusion-Coefficients
dc.subjectBulk Parameterization
dc.subjectRiver Estuary
dc.subjectSea Fluxes
dc.subjectExchange
dc.subjectOcean
dc.titleNumerical tools to estimate the flux of a gas across the air-water interface and assess the heterogeneity of its forcing functions
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage375
oaire.citation.issue2
oaire.citation.startPage355
oaire.citation.titleOcean Science
oaire.citation.volume9
person.familyNameMartins
person.familyNameSilva
person.familyNameSantos
person.givenNameFlávio
person.givenNameJoão
person.givenNameRui
person.identifier82814
person.identifier42560
person.identifier.ciencia-id6711-E990-FFD9
person.identifier.ciencia-id8216-527E-1BD4
person.identifier.ciencia-id9B18-444D-2244
person.identifier.orcid0000-0002-9863-6255
person.identifier.orcid0000-0002-7211-1661
person.identifier.orcid0000-0002-7861-4366
person.identifier.ridU-2673-2018
person.identifier.ridJ-7874-2013
person.identifier.ridB-4168-2008
person.identifier.scopus-author-id7006504350
person.identifier.scopus-author-id7403023547
person.identifier.scopus-author-id7201375018
rcaap.rightsopenAccess
rcaap.typearticle
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relation.isAuthorOfPublication61040b53-b17a-40f6-b42e-f5476a7a6ddb
relation.isAuthorOfPublication84487ca8-404a-4584-81f0-3662c340d712
relation.isAuthorOfPublication.latestForDiscovery1a3bc5b3-6032-43b3-880e-1a551ba84d02

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