A New Approach to estimate GHG content of air entering the Amazon basin for purpose of GHG fluxes using air column budgets

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dc.contributor.authorGATTI, LUCIANA V.
dc.contributor.authorDOMINGUES, LUCAS G.
dc.contributor.authorCORREIA, CAIO S.C.
dc.contributor.authorSANCHEZ, ALBER
dc.contributor.authorGLOOR, MANUEL
dc.contributor.authorMILLER, JOHN B.
dc.contributor.authorALDEN, CAROLINE
dc.contributor.authorMARANI, LUCIANO
dc.contributor.authorSANTOS, RICARDO S.
dc.contributor.authorCOSTA, WELLISON R.
dc.contributor.authorCRISPIM, STEPHANE P.
dc.contributor.authorBORGES, VIVIANE F.
dc.contributor.authorAQUINO, AFONSO R.
dc.coverageInternacionalpt_BR
dc.creator.eventoINTERNATIONAL CARBON DIOXIDE CONFERENCE, 10thpt_BR
dc.date.accessioned2018-09-17T13:34:03Z
dc.date.available2018-09-17T13:34:03Z
dc.date.eventoAugust 21-25, 2017pt_BR
dc.description.abstractAmazon humid forests are an important part of the tropical climate system and are a large pool of organic carbon which can be released rapidly both as a result of human destruction as well possibly in response to changing climate. In 2000 we started to measure regularly vertical profiles over the Brazilian Amazon Basin to estimate GHG balances as a large scale diagnostic of longer-term changes and short term responses to climate anomalies. To estimate Amazon Basin regional fluxes based on vertical profile data, we use an air column budget technique. To do so we profit from the primary air flow pattern over the basin with trade winds entering the basin along the North-east Atlantic coast, then travelling westwards towards the Andes, from where the air flow is bent south-eats-wards returning back towards the sea. Thus we can estimate fluxes from the difference in air column greenhouse gas content at a site in the Amazon basin and the air column content of air entering the basin, and an estimate of the time it takes for air parcels to travel from the Atlantic coast to the site in the Amazon. To estimate travel time we use back-trajectories calculated based on meteorological fields [Hysplit1 GDAS 1degree] One approach to estimate the greenhouse gas air column content of air entering the basin is to express air entering the basin as a mixture of northern hemisphere and southern hemisphere air. Specifically we use as end-members air concentrations measured at Barbados (RPB, NOAA site) and Ascension (ASC, NOAA site) respectively. To estimate fractional contributions we use a linear mixing model expressing in situ measured SF6 as a weighted sum of SF6 measured at the two NOAA background sites. Because flux estimates are very sensitive to SF6 precision and accuracy we have developed an alternative approach. Instead of determining weights from SF6 we base the weights on the latitude where a back-trajectory extending backwards in time from the site intersects a line connecting RPB, ASC (until 30°S). Now we use RPB, ASC and CPT (Cape Point; 34.35°S, 18.49°E). We will describe in detail the method and show tests of the approach using the SF6 based method which we trust for the years 2010 and 2011, but less for the following years because the NOAA quantification method change and our continue during more 4 years in the old linear quantification method. This difference produce slightly bias over time. While we developed this method for the Amazon it similarly could be applied to other regions with clearly defined wind patterns.pt_BR
dc.event.siglaICDCpt_BR
dc.format.extent242-242pt_BR
dc.identifier.citationGATTI, LUCIANA V.; DOMINGUES, LUCAS G.; CORREIA, CAIO S.C.; SANCHEZ, ALBER; GLOOR, MANUEL; MILLER, JOHN B.; ALDEN, CAROLINE; MARANI, LUCIANO; SANTOS, RICARDO S.; COSTA, WELLISON R.; CRISPIM, STEPHANE P.; BORGES, VIVIANE F.; AQUINO, AFONSO R. A New Approach to estimate GHG content of air entering the Amazon basin for purpose of GHG fluxes using air column budgets. In: INTERNATIONAL CARBON DIOXIDE CONFERENCE, 10th, August 21-25, 2017, Interlaken, Switzerland. <b>Abstract...</b> Bern, Switzerland: Swiss Academy of Sciences (SCNAT), 2017. p. 242-242. Disponível em: http://repositorio.ipen.br/handle/123456789/29150.
dc.identifier.orcidhttps://orcid.org/0000-0003-4908-8974
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/29150
dc.localBern, Switzerlandpt_BR
dc.local.eventoInterlaken, Switzerlandpt_BR
dc.publisherSwiss Academy of Sciences (SCNAT)pt_BR
dc.rightsopenAccesspt_BR
dc.titleA New Approach to estimate GHG content of air entering the Amazon basin for purpose of GHG fluxes using air column budgetspt_BR
dc.typeResumo de eventos científicospt_BR
dspace.entity.typePublication
ipen.autorRICARDO SANTANA DOS SANTOS
ipen.autorAFONSO RODRIGUES DE AQUINO
ipen.autorCAIO SILVESTRE DE CARVALHO CORREIA
ipen.autorLUCAS GATTI DOMINGUES
ipen.autorLUCIANA VANNI GATTI
ipen.codigoautor14384
ipen.codigoautor1171
ipen.codigoautor9389
ipen.codigoautor6548
ipen.codigoautor670
ipen.contributor.ipenauthorRICARDO SANTANA DOS SANTOS
ipen.contributor.ipenauthorAFONSO RODRIGUES DE AQUINO
ipen.contributor.ipenauthorCAIO SILVESTRE DE CARVALHO CORREIA
ipen.contributor.ipenauthorLUCAS GATTI DOMINGUES
ipen.contributor.ipenauthorLUCIANA VANNI GATTI
ipen.date.recebimento18-09pt_BR
ipen.event.datapadronizada2017pt_BR
ipen.identifier.ipendoc24962pt_BR
ipen.notas.internasAbstractpt_BR
ipen.type.genreResumo
relation.isAuthorOfPublication57a302cb-c596-4726-9dd0-6fe2d544faaa
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relation.isAuthorOfPublication.latestForDiscovery12ece531-6992-4dbf-b85f-3026471e1a3b
sigepi.autor.atividadeGATTI, LUCIANA V.:670:1010:Spt_BR
sigepi.autor.atividadeDOMINGUES, LUCAS G.:6548:1010:Npt_BR
sigepi.autor.atividadeCORREIA, CAIO S.C.:9389:1010:Npt_BR
sigepi.autor.atividadeSANTOS, RICARDO S.:14384:1010:Npt_BR
sigepi.autor.atividadeAQUINO, AFONSO R.:1171:1250:Npt_BR
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