LUCAS GATTI DOMINGUES
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Artigo IPEN-doc 22667 Validation and analysis of MOPITT CO observations of the Amazon Basin2016 - DEETER, M.N.; MARTINEZ-ALONSO, S.; GATTI, L.V.; GLOOR, M.; MILLER, J.B.; DOMINGUES, L.G.; CORREIA, C.S.C.We analyze satellite retrievals of carbon monoxide from the MOPITT (Measurements of Pollution in the Troposphere) instrument over the Amazon Basin, focusing on the MOPITT Version 6 “multispectral” retrieval product (exploiting both thermal-infrared and near-infrared channels). Validation results based on in situ vertical profiles measured between 2010 and 2013 are presented for four sites in the Amazon Basin. Results indicate a significant negative bias in retrieved lower-tropospheric CO concentrations. The possible influence of smoke aerosol as a source of retrieval bias is investigated using collocated Aerosol Robotic Network (AERONET) aerosol optical depth (AOD) measurements at two sites but does not appear to be significant. Finally, we exploit the MOPITT record to analyze both the mean annual cycle and the interannual variability of CO over the Amazon Basin since 2002.Artigo IPEN-doc 22703 CHsub(4) concentrations over the Amazon from GOSAT consistent with in situ vertical profile data2016 - WEBB, ALEX J.; BOSCH, HARTMUT; PARKER, ROBERT J.; GATTI, LUCIANA V.; GLOOR, EMANUEL; PALMER, PAUL I.; BASSO, LUANA S.; CHIPPERFIELD, MARTIN P.; CORREIA, CAIO S.C.; DOMINGUES, LUCAS G.; FENG, LIANG; GONZI, SIEGFRIED; MILLER, JOHN B.; WARNEKE, THORSTEN; WILSON, CHRISTOPHERThe Amazon Basin contains large wetland ecosystems which are important sources of methane (CH4). Space-borne observations of atmospheric CH4 provide constraints on emissions from these remote ecosystems, but lack of validation precludes robust estimates. We present the rst validation of CH4 columns in the Amazon from the Greenhouse gases Observing SATellite (GOSAT) using dedicated vertical pro le measurements of CH4 over ve sites across the Amazon Basin. These aircraft pro les, combined with the TOMCAT stratospheric model, are vertically integrated allowing direct comparison to the GOSAT measurements. The absolute columns agree within uncertainties or show no signi cant di erence at three of the aircraft sites (-1.9 2.2 ppb and 3.6 4.3 ppb at one site with two di erent campaigns; and 3.6 1.7 ppb, and 6.6 2.6 ppb at the other two), whilst at two sites GOSAT XCH4 is shown to be slightly higher than aircraft measurements, by up to approximately 10 ppb in the most di ering case (8.1 2.1 ppb and 9.7 2.8 ppb). The seasonality in XCH4 seen by the aircraft pro les is also well captured. GOSAT observes elevated concentrations in the north-west corner of South America in the dry season and enhanced concentrations elsewhere in the Amazon Basin in the wet season; with the strongest seasonal di erences coinciding with regions in Bolivia known to contain large wetlands. Our results are encouraging evidence that these GOSAT CH4 columns are in good agreement with in situ measurements and can be reliably used to provide new insights into tropical methane emissionsArtigo IPEN-doc 21680 Seasonality and interannual variability of CHsub(4) fluxes from the eastern Amazon Basin inferred from atmospheric mole fraction profiles2016 - BASSO, LUANA S.; GATTI, LUCIANA V.; GLOOR, MANUEL; MILLER, JOHN B.; DOMINGUES, LUCAS G.; CORREIA, CAIO S.C.; BORGES, VIVIANE F.Artigo IPEN-doc 21306 Response of the Amazon carbon balance to the 2010 drought derived with carbon tracker South America2015 - LAAN-LUIJKCX, I.T. van der; VELDE, I.R. van der; KROL, M.C.; GATTI, L.V.; DOMINGUES, L.G.; CORREIA, C.S.C.; MILLER, J.B.; GLOOR, M.; LEEUWEN, T.T. van; WIEDINMYER, C.; BASU, S.; CLERBAUX, C.; PETERS, W.; KAISER, J.W.