ALEX CARLOS PELLEGRINETTI MENDES

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    Resumo IPEN-doc 30958
    Inversion of methane TROPOMI data applied to Metropolitan Region of São Paulo
    2024 - ANDRADE, IZABEL S.; MENDES, ALEX C.P.; VARON, DANIEL; ANDRADE, MARIA F.; LANDULFO, EDUARDO
    Despite having numerous sources of methane emissions, the Metropolitan Region of São Paulo (MRSP), has a deficit in data related to emissions, especially in the identification of greenhouse gas sources in this region. Thus, the use of satellite data becomes a powerful tool to obtain estimates of methane emissions. The Sentinel 5-P satellite provides daily data on methane, so the application of an inverse method of these data makes it possible to estimate methane emissions from MRSP. We use Integrated Methane Inversion (IMI), this tool makes an inversion process that utilizes a highly sophisticated research-grade algorithm performing a straightforward inversion with a grid and default prior emission estimates. Inversions were performed, in the months of August, September, and October, due to the years of 2019, 2020, and 2021. This work presents the preliminary results of this study, which proved that IMI is a promising tool to obtain emission data of the MRSP.
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    Resumo IPEN-doc 30949
    Status and update on the WMO GAW Aerosol Lidar Observation Network (GALION)
    2024 - WELTON, E.J.; MONA, L.; LANDULFO, E.; SHIMIZU, A.; LEBLANC, T.; DEMA, C.; CHOUZA, F.; MENDES, A.; PALLOTTA, J.
    The WMO Global Atmospheric Watch (GAW) Aerosol Lidar Observation Network (GALION) was formed in 2008 as a collaboration of lidar networks, and includes the Asian Dust and Aerosol Lidar Observation Network (AD-Net), the European Aerosol Research Lidar Network (EARLINET), the Latin American Lidar Network (LALINET), the Micro Pulse Lidar Network (MPLNET), and lidar sites in the Network for the Detection of Atmospheric Composition Change (NDACC). The goal of GALION was to utilize a network of networks approach to share information, best practices, develop frameworks and techniques for quality data, and eventually provide an easier method of searching for and obtaining groundbased lidar data globally. A brief overview of GALION and its network members will be provided, along with a status update. We will provide an overview of the creation of the GALION data center, and our efforts to develop interoperability between the individual lidar network data centers and the WMO Observing Systems Capability Analysis and Review tool (OSCAR) to develop a database of lidar network capabilities. The GALION data center provides a first ever ability to examine global and regional coverage gaps and address coordinated site planning for the support of field campaigns, modeling and forecasting, satellite validation, and various other scientific studies. We will also present crossnetwork activities relevant to harmonizing the data products and quality across GALION, including intercomparison campaigns and formal work projects. Finally, we will discuss future plans to provide standard GALION data products and application support for air quality and volcanic plume monitoring, and consideration of including ceilometer networks in GALION.
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    Resumo IPEN-doc 27962
    Overview of the 2019 Sentinel-5p TROpomi vaLIdation eXperiment (TROLIX)
    2020 - APITULEY, ARNOUD; KREHER, KARIN; PITERS, ANKIE; SULLIVAN, JOHN; VAN ROOZENDAEL, MICHEL; VLEMMIX, TIM; DEN HOED, MIRJAM; FRUMAU, ARNOUD; HENZING, BAS; SPEET, BART; VONK, JAN; VEEFKIND, PEPIJN; ALVES, DIEGO; CACHEFFO, ALEXANDRE; STEIN-ZWEERS, DEBORAH; ALLAART, MARC; ESKES, HENK; VAN DER ENT, FLORIS; SALEEB, GEORGE; MCGEE, TOM; TWIGG, LARRY; SUMNICHT, GRANT; HENDRICK, FRANCOIS; MERLAUD, ALEXIS; FAYT, CAROLINE; HERMANS, CHRISTIAN; PINARDI, GAIA; DORNER, STEFFEN; WAGNER, THOMAS; LAUSTER, BIANCA; UBELE, ALMA; MENDES, ALEX; LOPES, FABIO; LANDULFO, EDUARDO; SPINEI, ELENA; QUEREL, RICHARD; KARAGKIOZIDIS, DIMITRIS; BAIS, ALKIS; HUTJES, RONALD
    For the validation of Sentinel-5p/TROPOMI the TROpomi vaLIdation eXperiment (TROLIX) was held in the Netherlands based at the Cabauw Experimental Site for Atmospheric Research during September 2019. TROLIX consisted of active and passive remote sensing platforms in conjunction with several balloon-borne and surface measurements. The intensive observations will serve to establish the quality of TROPOMI L2 main data products (UVAI, Aerosol Layer Height, NO2, O3, HCHO, Clouds) under realistic conditions with varying cloud cover and a wide range of atmospheric conditions. Since TROPOMI is a hyperspectral imager with a very high spatial resolution of 3.6 x 5.6 km2, understanding local effects such as inhomogeneous sources of pollution, sub-pixel clouds and variations in ground albedo is important to interpret TROPOMI results. Therefore, the campaign included sub-pixel resolution local networks of sensors, involving MAXDOAS and Pandora instruments, around Cabauw (rural) and within the city of Rotterdam (urban). Utilising its comprehensive in-situ and remote sensing observation program in and around the 213 m meteorological tower, Cabauw was the main site of the campaign with focus on vertical profiling using lidar instruments for aerosols, clouds, water vapor, tropospheric and stratospheric ozone, as well as balloon-borne sensors for NO2 and ozone. The data set collected can be directly compared to the TROPOMI L2 data products, while measurements of parameters related to a-priori data and auxiliary parameters that infuence the quality of the L2 products such as aerosol and cloud profiles and in-situ aerosol and atmospheric chemistry were also collected.