Amazon carbon balance and its sensitivity to climate and human-driven changes

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dc.contributor.authorGATTI, LUCIANApt_BR
dc.contributor.authorMILLER, JOHN B.pt_BR
dc.contributor.authorBASSO, LUANA S.pt_BR
dc.contributor.authorDOMINGUES, LUCAS G.pt_BR
dc.contributor.authorCASSOL, HENRIQUE L.G.pt_BR
dc.contributor.authorMARANI, LUCIANOpt_BR
dc.contributor.authorCORREIA, CAIO S. de C.pt_BR
dc.contributor.authorIPIA, ALBERpt_BR
dc.contributor.authorARAI, EGIDIOpt_BR
dc.contributor.authorTEJADA, GRACIELApt_BR
dc.contributor.authorARAGÃO, LUIZ E.O.C.pt_BR
dc.contributor.authorANDERSON, LIANA O.pt_BR
dc.contributor.authorVON RANDOW, CELSOpt_BR
dc.contributor.authorGLOOR, MANUELpt_BR
dc.contributor.authorPETERS, WOUTERpt_BR
dc.contributor.authorNEVES, RAIANE A.L.pt_BR
dc.contributor.authorCRISPIM, STEPHANE P.pt_BR
dc.coverageInternacionalpt_BR
dc.creator.eventoAGU FALL MEETINGpt_BR
dc.date.accessioned2020-03-27T18:38:57Z
dc.date.available2020-03-27T18:38:57Z
dc.date.eventoDecember 9-13, 2019pt_BR
dc.description.abstractThe Amazon accounts for 50% of Earth’s tropical rainforests hosting the largest live carbon pools in vegetation and soils (~200 PgC). The net carbon exchange between tropical land and the atmosphere is critically important, because the stability of carbon in forests and soils can be disrupted on short time-scales. The main processes releasing C to the atmosphere are deforestation, fires and changes in growing conditions due to increased temperatures and droughts. Such changes may thus cause feedbacks on global climate. In the last 40 years, the Amazon mean temperature has increased by 1.1ºC. Annual mean precipitation has also decreased by 51 mm during this same 40 year period. The precipitation reduction occurred mainly in the dry season, and the dry season has lengthened, exacerbating vegetation water stress with consequences for carbon balance. To better understand its C budget, starting in 2010 we established a regionally representative greenhouse gas monitoring program across Amazonia. The program aims to quantify gas concentrations (CO2, CH4, N2O, CO, and SF6) based on extensive collection of air from light aircraft vertical profiles. The atmosphere is profiled from the ground up to 4.5 km height at four sites along the main air-stream over the Amazon Basin on a twice-monthly basis. Here we will report what these new data tell us about the carbon balance and its controls from 2010-2017. During this period we performed 513 vertical profiles over four strategic regions that represent fluxes over much of Amazonia. The observed variability of carbon fluxes during these 8 years is correlated with climate-related (temperature, precipitation, soil water storage from GRACE satellite) and anthropogenic (fire counts) variables. The correlations were performed inside the upwind area for each profiling site. During our study period, the Amazon was a consistent source of 0.4 ± 0.2 PgC/year on average, extrapolating to the entire Amazon Basin area of 7.2 million km2. Fire emission is the main source of carbon to the atmosphere, which is not compensated by the C removal from old-growth Amazon forest. Moreover, the drought years of 2010, 2015 and 2016 are playing an outsized role in the eight-year mean. Removing those years from the mean, the net source is reduced from 0.4 ± 0.2 PgC/year to 0.2 ± 0.2 PgC/year.pt_BR
dc.identifier.citationGATTI, LUCIANA; MILLER, JOHN B.; BASSO, LUANA S.; DOMINGUES, LUCAS G.; CASSOL, HENRIQUE L.G.; MARANI, LUCIANO; CORREIA, CAIO S. de C.; IPIA, ALBER; ARAI, EGIDIO; TEJADA, GRACIELA; ARAGÃO, LUIZ E.O.C.; ANDERSON, LIANA O.; VON RANDOW, CELSO; GLOOR, MANUEL; PETERS, WOUTER; NEVES, RAIANE A.L.; CRISPIM, STEPHANE P. Amazon carbon balance and its sensitivity to climate and human-driven changes. In: AGU FALL MEETING, December 9-13, 2019, San Francisco, CA, USA. <b>Abstract...</b> Washington, DC, USA: American Geophysical Union, 2019. Disponível em: http://repositorio.ipen.br/handle/123456789/30979.
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/30979
dc.localWashington, DC, USApt_BR
dc.local.eventoSan Francisco, CA, USApt_BR
dc.publisherAmerican Geophysical Unionpt_BR
dc.rightsopenAccesspt_BR
dc.titleAmazon carbon balance and its sensitivity to climate and human-driven changespt_BR
dc.typeResumo de eventos científicospt_BR
dspace.entity.typePublication
ipen.autorCAIO SILVESTRE DE CARVALHO CORREIA
ipen.autorLUCAS GATTI DOMINGUES
ipen.codigoautor9389
ipen.codigoautor6548
ipen.contributor.ipenauthorCAIO SILVESTRE DE CARVALHO CORREIA
ipen.contributor.ipenauthorLUCAS GATTI DOMINGUES
ipen.date.recebimento20-03
ipen.event.datapadronizada2019pt_BR
ipen.identifier.ipendoc26776pt_BR
ipen.notas.internasAbstractpt_BR
ipen.type.genreResumo
relation.isAuthorOfPublicationacc5922b-1651-48af-a115-39477da9c65f
relation.isAuthorOfPublication3eb6eddc-494d-4e4c-bce8-4c6a4bafa5a6
relation.isAuthorOfPublication.latestForDiscovery3eb6eddc-494d-4e4c-bce8-4c6a4bafa5a6
sigepi.autor.atividadeCORREIA, CAIO S. de C.:9389:1010:Npt_BR
sigepi.autor.atividadeDOMINGUES, LUCAS G.:6548:1010:Npt_BR
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